ATLANTIC OCEAN

TENNESSEE

NORTH CAROLINA

KENTUCKY

WEST VIRGINIA

MARYLAND

WASHINGTON, D.C.

Culpeper Basin

U.S. Department of the Interior

U.S. Geological Survey

Scientific Investigations Report 2011–5143

Prepared in cooperation with the Virginia Department of Environmental Quality

Low-Flow Characteristics of Virginia Streams
Cover art. See figure 1 (map showing low-flow study sites in Virginia).
Low-Flow Characteristics of Virginia Streams

By Samuel H. Austin, Jennifer L. Krstolic, and Ute Wiegand

Prepared in cooperation with the Virginia Department of Environmental Quality

Scientific Investigations Report 2011–5143

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

KEN SALAZAR, Secretary

U.S. Geological Survey

Marcia K. McNutt, Director

U.S. Geological Survey, Reston, Virginia: 2011

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reproduce any copyrighted materials contained within this report.

Suggested citation:

Austin, S.H., Krstolic, J.L., and Wiegand, Ute, 2011, Low-flow characteristics of Virginia streams: U.S. Geological 

Survey Scientific Investigations Report 2011–5143, 122 p. + 9 tables on CD.

(Also available online at http://pubs.usgs.gov/sir/2011/5143/.)

ISBN 978 1 4113 3287 4
iii

Contents

Abstract...........................................................................................................................................................1

Introduction.....................................................................................................................................................1

Purpose and Scope ..............................................................................................................................1

Background............................................................................................................................................2

Physical Setting.....................................................................................................................................2

Coastal Plain.................................................................................................................................2

Piedmont........................................................................................................................................2

Blue Ridge.....................................................................................................................................4

Valley and Ridge...........................................................................................................................4

Appalachian Plateaus.................................................................................................................4

Previous Studies ...................................................................................................................................4

Approach.........................................................................................................................................................5

Site Selection.........................................................................................................................................5

Data Evaluation .....................................................................................................................................5

Monthly Streamflow Statistics ...........................................................................................................6

Flow-Duration Curves...........................................................................................................................6

Low-Flow Frequency Analysis............................................................................................................6

Conditional-Probability Adjustment..........................................................................................7

MOVE.1 Regression Equations for Short-Term, Continuous-Record and Partial-Record 

Streamgaging Stations...........................................................................................................8

MOVE.1 Analyses for Short-Term, Continuous-Record Streamgaging Stations...............8

MOVE.1 Analyses for Partial-Record Streamgaging Stations .............................................8

Basin Characteristics...........................................................................................................................9

Regionalization...............................................................................................................................................9

Definition of Regions ............................................................................................................................9

Model Development ...........................................................................................................................12

Model Verification and Diagnostics ................................................................................................12

Weighting Multiple Estimates....................................................................................................................19

Weighting of Independent Estimates ..............................................................................................19

Low-Flow Characteristics...........................................................................................................................20

Other Methods for Estimation at Ungaged Sites....................................................................................20

Example Applications..................................................................................................................................20

Use of Regression Equations............................................................................................................21

Drainage-Area Ratio Method ...........................................................................................................21

Ungaged Site with Nearby Gage......................................................................................................21

Gaged Site............................................................................................................................................22

Summary........................................................................................................................................................22

Acknowledgments.......................................................................................................................................22

References....................................................................................................................................................23

Glossary.........................................................................................................................................................26
iv

Figures

1. Map showing selected low-flow study sites and physiographic provinces 

for application of low-flow regional estimating equations....................................................3

2. Example leverage plots showing significant explanatory power, insignificant 

explanatory power, and evidence of collinearity ..................................................................13

Tables

1. Study sites and their identifying information ......................................................CD in pocket

2. Monthly streamflow statistics for selected continuous-record 

streamgaging stations ............................................................................................CD in pocket

3. Flow-duration statistics and flow variability indices for selected 

streamgaging stations ............................................................................................CD in pocket

4. Low-flow characteristics of streamgaging stations in Virginia..........................................27

5. Low-flow MOVE.1 equations for selected short-term, 

continuous-record streamgaging stations..........................................................CD in pocket

6. Low-flow MOVE.1 equations for selected partial-record 

streamgaging stations ............................................................................................CD in pocket

7. Statistics summarizing basin characteristics selected for regional 

regression of low flows in Virginia .......................................................................CD in pocket

8. Selected basin characteristics, their definitions, and datasources ..................................10

9. Basin characteristics of low-flow streamgaging stations in Virginia.............CD in pocket

10. Regional regression equations for estimating low flows 

of streams in Virginia .................................................................................................................15

11. Low-flow characteristics for selected short-term, continuous-record 

streamgaging stations, transferred using the MOVE.1 method.......................CD in pocket

12. Low-flow characteristics for selected partial-record streamgaging 

stations, transferred using the MOVE.1 method.................................................CD in pocket
v

Conversion Factors

Inch/Pound to SI

Multiply By To obtain

Length

foot (ft) 0.3048 meter (m)

mile (mi) 1.609 kilometer (km)

Area

acre 0.4047 hectare (ha)

square foot (ft2) 0.09290 square meter (m2)

square mile (mi2) 259.0 hectare (ha)

Volume

gallon (gal) 0.003785 cubic meter (m3) 

cubic foot (ft3) 0.02832 cubic meter (m3) 

acre-foot (acre-ft) 1,233 cubic meter (m3)

Flow rate

acre-foot per day (acre-ft/d) 0.01427 cubic meter per second (m3/s)

foot per second (ft/s) 0.3048 meter per second (m/s)

cubic foot per second (ft3/s) 0.02832 cubic meter per second (m3/s)

Hydraulic gradient

foot per mile (ft/mi) 0.1894 meter per kilometer (m/km)

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 

(NAVD 88).

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

Altitude, as used in this report, refers to distance above the vertical datum.

Low-Flow Characteristics of Virginia Streams

By Samuel H. Austin, Jennifer L. Krstolic, and Ute Wiegand

Abstract 

Low-flow annual non-exceedance probabilities (ANEP), 

called probability-percent chance (P-percent chance) flow estimates, regional regression equations, and transfer methods are 

provided describing the low-flow characteristics of Virginia 

streams. Statistical methods are used to evaluate streamflow 

data. Analysis of Virginia streamflow data collected from 

1895 through 2007 is summarized. Methods are provided for 

estimating low-flow characteristics of gaged and ungaged 

streams. The 1-, 4-, 7-, and 30-day average streamgaging 

station low-flow characteristics for 290 long-term, continuousrecord, streamgaging stations are determined, adjusted for 

instances of zero flow using a conditional probability adjustment method, and presented for non-exceedance probabilities 

of 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0.05, 0.02, 0.01, and 

0.005. Stream basin characteristics computed using spatial 

data and a geographic information system are used as explanatory variables in regional regression equations to estimate 

annual non-exceedance probabilities at gaged and ungaged 

sites and are summarized for 290 long-term, continuous-record 

streamgaging stations, 136 short-term, continuous-record 

streamgaging stations, and 613 partial-record streamgaging 

stations. Regional regression equations for six physiographic 

regions use basin characteristics to estimate 1-, 4-, 7-, and 

30-day average low-flow annual non-exceedance probabilities 

at gaged and ungaged sites. Weighted low-flow values that 

combine computed streamgaging station low-flow characteristics and annual non-exceedance probabilities from regional 

regression equations provide improved low-flow estimates. 

Regression equations developed using the Maintenance of 

Variance with Extension (MOVE.1) method describe the line 

of organic correlation (LOC) with an appropriate index site for 

low-flow characteristics at 136 short-term, continuous-record 

streamgaging stations and 613 partial-record streamgaging 

stations. Monthly streamflow statistics computed on the individual daily mean streamflows of selected continuous-record 

streamgaging stations and curves describing flow-duration 

are presented. Text, figures, and lists are provided summarizing low-flow estimates, selected low-flow sites, delineated 

physiographic regions, basin characteristics, regression 

equations, error estimates, definitions, and datasources. This 

study supersedes previous studies of low flows in Virginia.

Introduction 

Understanding low flows in Virginia streams is essential 

to sound management of our water resources and associated 

riparian and watershed ecosystems. Meaningful characterizations of the magnitude, frequency, and duration of low flows 

provide valuable insights into the dynamics and variability 

of water movement through these unique stream systems. 

Improved estimates of low flows provide data needed for 

the effective management of riparian systems and ecology 

associated with forested, agricultural, and urban landscapes. 

Low-flow estimates provide a basis for analysis of future 

streamflow response to changes in ecosystem and climate.

This report is the product of a cooperative partnership 

between the Virginia Department of Environmental Quality 

(DEQ) and the U.S. Geological Survey. The report describes 

the magnitude, frequency, and duration of low flows in 

Virginia streams. Low-flow characteristics are used to identify 

the reliability and sustainability of streamflows within the 

context of changing human demands and changing states of 

ecosystem organization. This information aids understanding 

of water use and the environmental health of watersheds and 

their associated ecosystems. 

Purpose and Scope

The purpose of this report is to present the findings of 

a study to determine the magnitude, frequency, and duration 

of low flows in Virginia streams. This report summarizes 

a statistical analysis of low-flow characteristics of Virginia 

streams using data collected in Virginia from 1895 through 

2007. Low-flow annual non-exceedance probabilities, called 

probability-percent chance (P-percent chance) flow estimates, 

and regional regression equations are used to describe the lowflow characteristics of Virginia streams. Statistical methods 

are used to evaluate streamflow data. Methods are provided 

for estimating low flow of gaged and ungaged streams. The 

1-, 4-, 7-, and 30-day average streamgaging station low flows 

for 290 long-term, continuous-record streamgaging stations 

are determined, adjusted for instances of zero flow using a 

conditional probability adjustment method, and presented for 

non-exceedance probabilities of 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 

0.3, 0.2, 0.1, 0.05, 0.02, 0.01, and 0.005 (recurrence intervals 

of 1.11, 1.25, 1.43, 1.67, 2.0, 2.5, 3.3, 5, 10, 20, 50, 100, 
2 Low-Flow Characteristics of Virginia Streams

and 200 years, respectively). Stream basin characteristics 

computed using spatial data and a geographic information 

system are used as explanatory variables in regional regression 

equations to estimate annual non-exceedance probabilities at 

gaged and ungaged sites and are summarized for 290 longterm, continuous-record streamgaging stations, 136 short-term, 

continuous-record streamgaging stations, and 613 partialrecord streamgaging stations. Regional regression equations 

for six physiographic regions use basin characteristics to 

estimate 1-, 4-, 7-, and 30-day average low-flow annual nonexceedance probabilities at gaged and ungaged sites. Weighted 

low-flow values that combine computed streamgaging station 

low-flow characteristics and annual non-exceedance probabilities from regional regression equations provide improved 

low-flow estimates. Regression equations developed using 

the Maintenance of Variance with Extension (MOVE.1) 

method describe a line of organic correlation (LOC) with 

an appropriate index site for low-flow characteristics at 

136 short-term, continuous-record streamgaging stations and 

613 partial-record streamgaging stations. Monthly streamflow 

statistics computed on the individual daily mean streamflows 

of 375 selected continuous-record streamgaging stations and 

statistics describing flow-duration are presented. Text, figures, 

and lists are provided summarizing low-flow estimates, 

selected low-flow sites, delineated physiographic regions, 

basin characteristics, regression equations, error estimates, 

definitions, and datasources. This study supersedes previous 

studies of low flows in Virginia.

Background

The DEQ and the U.S. Geological Survey (USGS) work 

cooperatively, maintaining a statewide network of more than 

290 continuous streamgaging stations with many additional 

partial-record streamgaging stations. Together DEQ and 

USGS develop computations, analyses, and tools to support 

understanding and effective management of streamflows. 

These data and methods support evaluation and prediction by 

DEQ of streamwater low flows throughout Virginia.

Physical Setting

Virginia is located on the Atlantic Coast, bordered to 

the north by Maryland and West Virginia, to the south by 

North Carolina and Tennessee, and to the west by Kentucky 

and West Virginia (fig. 1). The total area of Virginia is 

approximately 41,000 square miles (mi2). This includes almost 

1,000 mi2 of lakes, tidal rivers, and bays. There are more than 

3,000 miles (mi) of nontidal rivers in Virginia and 5,000 mi 

of shoreline along the Atlantic Coast and Chesapeake Bay 

(Fenneman, 1938; Fenneman and Johnson, 1946).

Virginia lies within five physiographic provinces—the 

Coastal Plain, Piedmont, Blue Ridge, Valley and Ridge, 

and Appalachian Plateaus Physiographic Provinces. Each 

province, hereafter termed physiographic region or low-flow 

region, has distinctive geologic features and landforms. Geology ranges from unconsolidated sands and clays in the Coastal 

Plain physiographic region, to igneous and metamorphic rocks 

in the Piedmont and Blue Ridge physiographic regions, to 

sedimentary rocks, carbonate rocks, sandstone, and shale in 

the Valley and Ridge and Appalachian Plateaus physiographic 

regions (Hayes, 1991). Topography ranges from virtually flat 

in the Coastal Plain to highly dissected rugged terrain along 

the Blue Ridge and Appalachian crests. The central Piedmont 

is characterized by rolling hills and valleys, and is separated 

from the Valley and Ridge physiographic region by the Blue 

Ridge Mountains. Land-surface elevations range from 0 feet 

(ft) to over 5,000 ft above sea level (Fenneman, 1938).

Coastal Plain

The Coastal Plain physiographic region (Coastal Plain) 

generally consists of unconsolidated, gently sloping layers of 

sand and gravel separated by layers of clay and marl. The eastern boundary of the Coastal Plain is the Atlantic Ocean. The 

western boundary is the Fall Line, where the resistant rock of 

the Piedmont forms a contact with the unconsolidated sediments of the Coastal Plain (Fenneman, 1938). Sediments are 

thin at the Fall Line and thicken to as much as 6,000 ft at the 

eastern edge of the Coastal Plain and are more than 13,000 ft 

thick under the Continental Shelf. These sediments rest on 

an eroded surface of Precambrian to early Mesozoic rock. 

Two-thirds of this material is composed of Late Jurassic and 

Cretaceous clay, sand, and gravel, which was stripped from 

the Appalachian mountains, carried eastward by rivers, and 

deposited in deltas in the newly formed Atlantic Ocean basin. 

A sequence of thin, fossiliferous marine sands of Tertiary age 

overlies the older strata. These sands were deposited in warm, 

shallow seas during repeated marine transgressions across the 

Coastal Plain (Hayes, 1991). This pattern of deposition was 

interrupted about 35 million years ago by a large meteorite 

that plummeted into a shallow sea and created a crater more 

than 55 mi in diameter, termed the Chesapeake Bay impact 

structure, which was subsequently buried under about 4,000 ft 

of younger sediment (Edwards and others, 2005). Rivers 

and streams are affected by tides over a substantial area 

(Fenneman, 1938; Fenneman and Johnson, 1946).

Piedmont

The Piedmont physiographic region (Piedmont) in 

Virginia consists of gently rolling terrain, which extends from 

the base of the Blue Ridge Mountains east to the Fall Line. It 

is the largest physiographic region in Virginia, is widest along 

the Virginia–North Carolina border (approximately 125 mi 

wide), then narrows to about 25 mi wide in northern Virginia. 

The Piedmont is formed mainly of metamorphic and igneous 

rocks that consist of granite, gneiss, schist, slate, phyllite, and 

quartzite. Triassic and Jurassic sedimentary rocks form several 

early Mesozoic Basins in the Piedmont that consist mainly of 
Introduction 

3

ATLANTIC OCEAN

EXPLANATION

Site type

Long-term continuous recordShort-term continuous recordPartial record

Physiographic provinces

Coastal PlainPiedmont

Mesozoic Basins

Blue RidgeValley and RidgeAppalachian Plateaus

NORTH CAROLINA TENNESSEE

KENTUCKY

WEST VIRGINIA MARYLAND

WASHINGTON, D.C.

Culpeper Basin

Fall Line

75° 76° 77° 78° 79° 80° 81° 82° 83°

40°39°38°37°36°

0 20 40 MILES0 20 40 KILOMETERS

Figure 1. Selected low-flow study sites and physiographic provinces for application of low-flow regional

Base from U.S. Geological Survey Digital Line Graph, 1:2,000,000, 1987

Figure 1. estimating equations. Selected low-flow study sites and physiographic provinces for application of low-flow regional estimating equations.
4 Low-Flow Characteristics of Virginia Streams

shales and sandstones intruded by diabase. Geologic formations of the Piedmont trend northeast-southwest and generally 

are covered by a deep (6 to 65 ft) layer of saprolite. Outcrops 

commonly are restricted to stream valleys where saprolite has 

been removed by erosion. The topography becomes somewhat 

more rugged with proximity to the Blue Ridge physiographic 

region, where local hills, knobs, or ridges of more resistant 

rock are present (Fenneman, 1938).

The Mesozoic Basins are located within the Piedmont, 

but they are evaluated as a separate physiographic region 

in this study because of their unique geomorphology and 

the associated improvements in explanatory power of basin 

characteristics in regional regression equations developed 

specifically for Mesozoic Basins. The Mesozoic Basins consist 

of sediments deposited in fault basins and are usually referred 

to as Triassic Basin deposits, though they are known to also 

contain lower Jurassic rocks. These basins formed when Africa 

separated from North America to create the Atlantic Ocean. 

The Culpeper basin, in the western Piedmont near the Blue 

Ridge physiographic region is the largest Mesozoic Basin in 

Virginia, but smaller basins, including the Richmond, Farmville, and Danville, are scattered throughout the Piedmont. 

Structurally, these are partially depressed blocks of land with a 

main fault on the western side. Ancient alluvial fan conglomerates fill these basins along the western borders, and deep red 

sediments fill the eastern portions of these basins. These red 

sediments often contain fish fossils or dinosaur tracks, indicating that tropical lakes and mudflats were present. Numerous 

igneous rocks and lava flows cut into these Triassic sediments 

and are remnants of the volcanic activity that accompanied the 

opening of the Atlantic Ocean (Hayes, 1991).

Blue Ridge

The Blue Ridge physiographic region (Blue Ridge) lies 

between the Valley and Ridge and the Piedmont. It is a fairly 

thin ridge of northeast–southwest-trending mountains consisting mainly of metamorphic and igneous rocks, with some 

sedimentary rock on the western slope. By the early Cambrian, 

the Iapetus Ocean had opened to the east of the Blue Ridge, 

and a westward transgression occurred along the ancient 

North American margin. In the western Blue Ridge, shallow 

marine siliclastics of the Chilhowee Group were deposited in 

the early Cambrian and eventually gave way to carbonates of 

Cambro-Ordovician age. In central and northern Virginia, the 

Blue Ridge Mountains rise to elevations exceeding 4,000 ft. 

Local relief on the east side of the Blue Ridge is up to 3,000 ft. 

In southern Virginia, the Blue Ridge forms a broad plateaulike upland that rises over 1,500 ft from the Piedmont along 

a prominent escarpment. Mt. Rogers (5,728 ft), in the southwestern Virginia Blue Ridge, is the highest peak in Virginia. 

Steep slopes allow only thin soils in some areas, thus reducing 

the amount of groundwater storage (Hayes, 1991).

Valley and Ridge

The Valley and Ridge physiographic region (Valley 

and Ridge) was formed by the folding and faulting of 

sedimentary rocks. Northeast–southwest-trending ridges are 

formed by resistant quartzite, sandstone, and conglomerates, 

while narrow valleys are underlain by limestone, shale, and 

dolostone. The characteristic topography of this region is the 

result of differential weathering of linear belts of rocks that 

has been repeated by folding and faulting. Cambrian clastic 

sediments of the western Blue Ridge are overlain by carbonate 

rocks. For at least 70 million years, carbonates were deposited 

in a shallow, tropical ocean along the southeastern edge of 

North America. Today these carbonates, up to 2 mi thick, are 

exposed in the Great Valley, known as the Shenandoah Valley 

in central and northern Virginia, and in the easternmost portion 

of the Valley and Ridge. Well-developed karst topography 

is characteristic of the Great Valley, and many caverns are 

located in the subsurface (Hayes, 1991).

Appalachian Plateaus

The Appalachian Plateaus physiographic region (Appalachian Plateaus), locally known as the Cumberland Plateau, 

consists of westward-dipping, consolidated, sedimentary rocks 

composed mainly of sandstone, shale, and coal. It is located 

at the western end of Virginia. Extensive erosion has formed 

steep slopes and narrow valleys throughout this province. 

Although some parts exhibit a low relief plateau-like morphology, much of the Appalachian Plateaus is strongly dissected by 

stream erosion, and the topography is rugged. Regional-scale 

folds in the Appalachian Plateaus were formed in response to 

shortening on thrust faults that do not reach the present surface 

and are rooted to the east in the Valley and Ridge. The upper 

Paleozoic strata of the Plateaus are rich in mineral resources, 

such as coal, natural gas, and petroleum (Fenneman, 1938; 

Fenneman and Johnson, 1946).

Previous Studies

Previous studies have collected and reported low-flow 

data or analyzed low-flow characteristics for Virginia streams. 

Hayes (1991) provided a comprehensive analysis of low-flow 

characteristics in Virginia streams. A study by Nuckels (1970) 

analyzed long-term, continuous-record streamgaging stations 

throughout Virginia. Other studies have focused on portions of 

the State. These include studies by Cushing and others (1973), 

Trainer and Watkins (1975), Mohler and Hagan (1981), Smith 

(1981), Wetzel and Bettandorff (1986), Lynch (1987), and 

Lynch and others (1987).
Approach 5

Approach

Low-flow characteristics were determined by frequency 

analysis of low-flow non-exceedance probabilities and annual 

and monthly flow-duration statistics. Study sites were selected, 

data were evaluated, basin characteristics were compiled, and 

low-flow frequency and duration analyses were performed. 

Regional regression equations were developed using 

frequency data and basin characteristics. Study results are 

presented in a series of tables.

Site Selection

Streamgaging stations with at least 10 years of continuous record were identified as long-term, continuous-record 

streamgaging stations. Streamgaging stations with less than 

10 years of continuous record were identified as short-term, 

continuous-record streamgaging stations. A total of 426 

continuous-record streamgaging stations met these criteria. 

There were 290 long-term, continuous-record streamgaging 

stations and 136 short-term, continuous-record streamgaging 

stations selected for study. More than 3,000 partial-record 

streamgaging stations were identified as candidates for 

low-flow characterization. Of these, 1,642 were identified 

as potential study sites, each having enough flow data upon 

which to perform statistical tests. Of these, 626 sites met a 

threshold of at least 10 low-flow discharge measurements 

considered necessary to create a meaningful index-site, 

partial-record site x-y low-flow relation. Of these, 13 sites 

were removed from the final group of relations due to a lack 

of meaningful statistical relation between the paired x-y 

datasets. A total of 613 sites were found to be suitable with 

viable statistical relations between partial-record flow data 

and corresponding, vetted, index-record site daily value flow 

data, from which index-site, partial-record site x-y pairs were 

developed.

In each of these site categories, (1) long-term continuousrecord, (2) short-term continuous-record, and (3) partialrecord, data from candidate streamgaging stations were quality 

checked to identify any numerical errors. Then, tables were 

created for candidate streamgaging stations in each category, 

listing all datapoints over the period of record. Each list of 

datapoints was individually evaluated, using written accounts 

of past data-collection procedures and anecdotal information 

specific to each streamgaging site, to discover and segregate 

any intervals in the record in which concomitant effects such 

as data of poor quality or severely altered or regulated flows 

negatively affected the candidate data. Data within these 

impacted intervals were segregated from the larger dataset.

Similarly, using professional judgment, drainage basin 

area and usable watershed storage volume upstream from 

the streamgaging station were calculated for each candidate 

dataset in which regulation was suspected. If the calculated 

volume of usable water storage upstream from the streamgaging station met or exceeded 100 acre-feet per square mile, 

an amount considered to significantly regulate streamflow, 

then the affected streamflow data were eliminated from the 

analysis, potentially eliminating the streamgaging station 

as a candidate site (Benson, 1962, 1964). The streamgaging 

stations used in this study are listed in table 1 (compact disc 

(CD) in pocket).

Data Evaluation

For each long- and short-term continuous-record dataset, 

the annual 1-, 4-, 7-, and 30-day average low-flow climatic 

year (April 1 through March 31) time series were determined. 

Datapoints in each long- and short-term continuous-record 

time series, and datapoints from each partial-record dataset 

were plotted in time-series-specific, streamgaging stationspecific scatter plots, and each scatter plot was visually 

checked for evidence of trends. Summary statistics were generated for each dataset along with additional statistics useful 

for identifying trends in data and monotonic, non-monotonic, 

linear, and non-linear correlation, including (1) calculating 

Kendall’s Tau, (2) creating an index of Kendall’s trend probability, and (3) calculating Spearman’s rho to help determine 

the strength of any linear or non-linear monotonic trend 

(Helsel and Hirsch, 2002). Also, (4) linear regression of each 

dataset with time and (5) plotting residuals were performed 

to help identify any significant correlation with time and, if 

evident, any negative or positive auto-correlation. Finally, 

(6) a runs test of each dataset was performed to help determine 

any significantly non-linear change over time using GraphPad 

Prism1.

The results of these statistical tests were summarized 

for each candidate dataset and used to help determine the 

degree of significant auto-correlation within the data from 

each candidate site. If no significant trend was evident at the 

0.05 confidence level, the candidate site became part of the 

study pool in its site class. If a significant trend was evident, 

it was further evaluated to determine if (1) the trend could be 

directly attributed to a causal factor or (2) the trend produced 

values that exceed those normally expected from a random 

sample. If the trend could not be directly attributed to a causal 

factor or if trend values ranged within the bounds of expected 

statistical variation, then the trend was considered nonproblematic and no efforts were made to compensate for it by 

adjusting the streamgaging station dataset. If the trend could 

be attributed to a causal factor or trend values were determined 

to range outside the bounds of expected statistical variation, 

then several methods to evaluate the dataset and remove the 

trend were considered. These methods included (1) testing the 

dataset against an annual precipitation time series to identify 

any correlation with annual precipitation, (2) sampling from 

the dataset, then re-evaluating the auto-correlation of the 

sample, (3) grouping the data into alternate time periods 

and computing a summary statistic for the period, such as a 

1

 GraphPad Prism version 5.0b, 2009, GraphPad Software, 

San Diego, California.
6 Low-Flow Characteristics of Virginia Streams

time-weighted mean or median, and (4) removing the dataset 

from the pool of sites to be analyzed. If trends persisted in the 

revised dataset, then the candidate dataset was removed from 

consideration as a possible study site. 

Of the 290 long-term, continuous-record candidate datasets considered for study, zero were removed from consideration because they either had too few datapoints available for 

analysis or characterized streams with excessively regulated 

flow, while 56 datasets were adjusted to remove data collected 

during periods of excessively regulated flow. Significant 

statistical trends were identified in 80 datasets. Of these, 

trends in 14 datasets were determined to be non-problematic, 

and trends in 66 datasets were determined as potentially 

problematic. The 66 potentially problematic datasets were 

detrended by sampling from the dataset and re-evaluating the 

auto-correlation of the sample.

Of the 136 short-term, continuous-record candidate 

datasets considered for study, zero were removed from 

consideration because they either had too few datapoints available for analysis or characterized streams with excessively 

regulated flow. Significant statistical trends were identified in 

zero of these datasets.

Of the over 3,000 partial-record candidate datasets 

considered for study, more than 1,358 were removed from 

consideration because they either had too few datapoints 

available for analysis, or characterized streams with excessively regulated flow. Of the remaining 1,642 sites, 1,016 

were removed from consideration because a minimum of 

10 low-flow measurements considered necessary to create a 

meaningful index-site, partial-record site x-y low-flow relation 

were lacking in the dataset, and 13 were removed from 

consideration because a suitable, vetted, index-record site with 

corresponding daily value flow data from which to develop 

an index-site, partial-record site x-y pair could not be found. 

Of the remaining 613 sites, statistical trends were identified in 

zero datasets, and zero datasets were partially censored due to 

indications of excessively regulated flow.

Monthly Streamflow Statistics

Monthly streamflow statistics were determined in units 

of cubic feet per second and cubic feet per second per square 

mile for over 300 continuous-record streamgaging stations 

using USGS individual daily streamflow data collected over 

the period of record (USGS National Water Information 

System (NWIS) database accessed March 11, 2009). Streamflow statistics computed include the count of individual daily 

streamflow data values, the maximum, minimum, and median 

values sampled in each month, the arithmetic, geometric, and 

harmonic mean values for each month, the standard deviation 

of values in each month, and the monthly flow-duration value 

within each of the following percentile groupings: 5th percentile, 10th percentile, 20th percentile, 30th percentile, 40th percentile, 50th percentile, 60th percentile, 70th percentile, 

80th percentile, and 90th percentile. Relative comparisons of 

inter-basin monthly streamflows may be made using monthly 

statistics presented in units of cubic feet per second per square 

mile. Relative comparisons of monthly low flows to other 

flows may be made using the monthly streamflow percentiles 

presented in groupings ranging from the 5th percentile 

monthly flow to the 90th percentile monthly flow. Monthly 

streamflow statistics are listed in table 2 (CD in pocket).

Flow-Duration Curves

Flow-duration curves were developed for more than 

300 continuous-record streamgaging stations using USGS 

individual daily value streamflow data collected over the 

period of record (USGS NWIS database accessed March 11, 

2009). Flow-duration statistics were summarized and 

transferred to short-term, continuous-record and partial-record 

streamgaging stations using the MOVE.1 method. A flowduration curve is a cumulative frequency curve that shows 

the relation between streamflow and the percentage of time 

that it is equaled or exceeded. These curves may be used to 

answer questions such as, “what percentage of time is the 

daily value of flow data above (or below) a certain discharge 

value?” To create the curves, individual daily value streamflow 

data, expressed in cubic feet per second (ft3/s), were ranked 

from largest to smallest daily value, organized by percentile 

categories and plotted. Statistics from flow-duration curves are 

summarized in table 3 (CD in pocket).

In addition to daily value flow-duration statistics, a 

base-flow index, and Lane’s variability index were computed 

for continuous-record, short-term continuous-record, and 

partial-record streamgaging stations. The ratio of daily value 

flow-duration statistics Q50 and Q90 is a useful index of the 

variability of base flow associated with stream low flow. For 

each streamgaging station, a base-flow index was computed 

as the log10 of the ratio of daily value flow-duration Q50 to 

daily value flow-duration Q90 (Nelms and others, 1997). Lane’s 

variability index (Lane and Lei, 1950) was also computed 

for each streamgaging station; this index is a measure of 

the overall variability of the daily flow-duration values for 

a particular streamgaging station and is calculated as the 

standard deviation of the logarithms of the daily flow-duration 

values. Base-flow indices and Lane’s variability indices are 

listed in table 3.

Low-Flow Frequency Analysis

Low-flow frequency analysis was used to determine 

the annual 1-, 4-, 7-, and 30-day average minimum lowflow climatic year time series and annual non-exceedance 

probabilities for long-term, continuous-record streamgaging 

stations. The 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0.05, 

0.02, 0.01, and 0.005 annual non-exceedance probabilities 

were calculated. The climatic year was defined as April 1 

through March 31. After these analyses were made, daily 

flow values from suitable long-term, continuous-record 
Approach 7

streamgaging stations were matched with daily flow values 

from short-term, continuous-record streamgaging stations, and 

instantaneous discharge measurements from partial-record 

streamgaging stations, to create index-site, short-term continuous, and index-site, partial-record x-y pairs. A line of organic 

correlation (LOC) was fitted to each set of x-y pairs using the 

Maintenance of Variance with Extension (MOVE.1) method, 

and low-flow frequencies were then described for each shortterm continuous-record site and each partial-record site as the 

transfer of the index-site flow statistic through the orthogonal 

LOC relation. For more information, see the section titled 

MOVE.1 Regression Equations for Partial-Record and ShortTerm, Continuous-Record Streamgaging Stations.

Low-flow frequency analysis began with calculation of 

the annual streamflow time series by climatic year for each 

average minimum flow of interest, yielding the 1-, 4-, 7-, and 

30-day average minimum low-flow climatic year time series 

for each long-term, continuous-record streamgaging site. Each 

time series dataset was examined for suitability for frequency 

analysis, as previously described in the data evaluation section. A Log-Pearson Type III probability distribution was then 

fitted to each vetted annual low-flow time series, yielding a 

conditional-probability curve describing all flows as restricted 

by flow value and assumed to be non-zero. Selected, restricted 

low-flow characteristics were computed using a fitted LogPearson Type III parametric distribution of the form:

, X X KS T = +

where

XT = the conditional low-flow statistic;

X = the mean of the annual events;

S = the standard deviation of the logarithms of 

the annual events; and

K = the Log-Pearson Type III frequency factor for 

skewness of G at a recurrence interval of T, 

remembering that low-flow 

non-exceedance probability 1 () . p T =

The Log-Pearson Type III is a 3-parameter distribution, 

well suited to analyses of data tending to have lower limits but 

no upper bounds. The Log-Pearson Type III distribution also 

contains the log-normal distribution, as a special case, when 

the skew coefficient of the logarithmically transformed data 

equals zero. These attributes, combined with the flexibility 

of a 3-parameter distribution, make the Log-Pearson Type 

III parametric distribution well-suited to low-flow frequency 

analysis.

The Log-Pearson Type III conditional-probability curve 

was inspected for adequate fit and the conditional return period 

low flows for the 1-, 4-, 7-, and 30-year averaged time series 

were retrieved. If flow events with a magnitude of zero were 

present in an averaged time series, then the fitted conditionalprobability curve was adjusted, using conditional-probability 

(1)

adjustment methods described below, and yielding a fitted 

Log-Pearson Type III unconditional-probability curve describing low-flow probabilities not restricted by flow value. The 

unconditional-probability curve was inspected for adequate fit, 

and the unconditional return period low flows for the 1-, 4-, 

7-, and 30-year averaged time series were retrieved. Retrieved 

return-period flows were tabulated, graphed, and organized 

by streamgaging station number and averaged-time series 

category. These data are summarized in table 4 (p. 27).

Conditional-Probability Adjustment

Methods of conditional probability adjustment (Jennings 

and Benson, 1969; Tasker, 1987), were used to adjust the 

annual non-exceedance probability Log-Pearson Type III lowflow curves, developed in the low-flow frequency analysis, 

for instances of zero flow. This was done by adjusting the 

Log-Pearson Type III distribution for cases where one or more 

elements of the annual 1-, 4-, 7-, or 30-day average low-flow 

time series were equal to zero.

The fitted Log-Pearson Type III parametric distribution 

has the form shown in eq 1 and is considered a conditional

parametric distribution, or probability curve, because it 

describes the probability that a low flow is less than a particular flow threshold given that all flow remains non-zero. 

The conditional probability adjustment creates an 

unconditional Log-Pearson Type III parametric distribution, 

in which the probability curve describing the low flow is not 

restricted by flow value.

The conditional probability adjustment is described by 

the following equation:

* , X X KS T = +

where

XT = the unconditional low-flow statistic;

X and S = mean and standard deviation respectively, 

computed from the non-zero annual 1-, 4-, 

7-, and 30-day average low flows; and

K* = the adjusted frequency factor calculated 

using an adjusted probability, padj, which 

equals

, N Nnp n n

 −   −        

where

N = the total number of events in the low-flow 

time series,

n = the number of non-zero events, and

p = the unconditional probability (1/T).

The numbers in table 4 are adjusted for zero flow using conditional probability adjustment.

(2)
8 Low-Flow Characteristics of Virginia Streams

MOVE.1 Regression Equations for ShortTerm, Continuous-Record and Partial-Record 

Streamgaging Stations

Regression equations describing low flows at partialrecord and short-term, continuous-record streamgaging stations as functions of flows at selected long-term, continuousrecord, index sites were prepared using the MOVE.1 method 

proposed by Stedinger and Thomas (Stedinger and Thomas, 

1985). This method allows common logarithms (Log10 ) of 

streamflow daily values collected at a short-term, continuousrecord, streamgaging station, or instantaneous discharge 

measurements collected at a partial-record, streamgaging 

station (y-axis), to be plotted against corresponding common 

logarithms of streamflow daily values from an appropriate 

index site (x-axis). An ordinary least squares linear regression 

model of the form y = a + bx is fitted to these transformed 

data, and the relation is then adjusted using the MOVE.1 

method, yielding an orthogonal LOC. The LOC may be used 

to estimate the common logarithm of stream low flow at the 

short-term, continuous- or partial-record site (y), as a function 

of the common logarithm of streamflow at the index-record 

site (x), while preserving the statistical variance associated 

with each site. As the relation of low-flow values from either 

a partial-record site, or a short-term, continuous-record site, 

to a corresponding long-term, continuous-record site can be 

non-linear, the linear transformation of values afforded by 

the MOVE.1 linear regression of the LOC of the common 

logarithms of each dataset can accommodate, yielding 

accurate transfer of values through the relation line.

MOVE.1 Analyses for Short-Term, ContinuousRecord Streamgaging Stations

Regression equations describing low flows at short-term, 

continuous-record streamgaging stations were prepared using 

methods similar to those used for partial-record stations. 

One-hundred thirty-six (136) short-term, continuous-record 

streamgaging station datasets were evaluated as possible 

candidates for low-flow characterization using the MOVE.1 

methodology. All of these datasets were identified as having 

enough flow data upon which to perform statistical tests. 

Statistics describing each dataset were developed and scattergrams of each dataset were prepared.

The daily flow values within the 136 short-term, 

continuous-record datasets were compared against the 

corresponding daily flow values within 251 vetted long-term, 

continuous-record datasets identified as candidate index sites. 

Three dimensionless indices, each expressed as a value from 0 

to 1, were created to facilitate the ranking and comparison of 

each potential x-y pair by (1) the number of coincident days 

in which daily flow data values were computed, expressed as 

a fraction of the number of daily flow data values computed 

at the short-term, continuous-record site, (2) the value of 

Spearman’s rank correlation coefficient (rs ) computed for 

each short-term, continuous-record site and candidate index 

site, and (3) a ranking of candidate index-site proximity to the 

short-term, continuous-record site, relative to the proximity of 

other candidate index sites. An overall ranking of candidate 

index-site, short-term, continuous-record site x-y pairs, 

computed as the sum of the three separate dimensionless 

indices, was used to facilitate creation of a list containing the 

top 20 ranked candidate index-site, short-term, continuousrecord site x-y pairs. An orthogonal regression of the common 

logarithms of the measured daily flow values of the short-term, 

continuous-record site against the common logarithms of each 

of the top 20 candidate index sites was performed using the 

MOVE.1 method, yielding a plot and LOC for each of the 

top 20 candidate pairs for each short-term, continuous-record 

site. Each of the candidate x-y pair selections contained in the 

top 20 ranking list for each of the 136 short-term, continuousrecord regressions was then individually evaluated based on 

the orthogonal regression and additional statistical, empirical, 

and anecdotal information specific to each site. Then a best 

representative index-site, short-term, continuous-record site 

x-y pair regression was selected. Zero index-site, short-term, 

continuous-record site x-y pair regressions were removed 

from the final group of relations due to lack of a meaningful 

statistical relation between the x and y variables of the dataset. 

Low-flow frequencies were described for each short-term, 

continuous-record site as the transfer of the index-site flow 

statistic through the orthogonal LOC relation. Short-term, 

continuous-record site MOVE.1 regression equations are listed 

in table 5 (CD in pocket).

MOVE.1 Analyses for Partial-Record 

Streamgaging Stations

More than 3,000 partial-record streamgaging station 

datasets were evaluated as possible candidates for low-flow 

characterization using the MOVE.1 methodology. Of these, 

1,642 datasets were identified as having enough flow data 

upon which to perform statistical tests. Statistics describing 

each dataset were developed and scattergrams of each dataset 

were prepared. Based on statistical descriptions and visual 

checks of each scattergram it was determined that each partialrecord dataset should contain at least 10 low-flow discharge 

measurements in order to create a meaningful index-site, 

partial-record site x-y relation. A subset of 626 partial-record 

datasets, each with more than 9 low-flow measurements, was 

identified for further analysis.

Flow data from partial-record streamgaging stations 

are instantaneous discharge measurements, and flow data 

from continuous-record streamgaging stations are daily flow 

values. The instantaneous discharge measurements within 

the 626 partial-record datasets were compared against the 

corresponding daily flow values within 255 vetted long-term, 

continuous-record datasets identified as candidate index sites. 

Three dimensionless indices, each expressed as a value from 0 

to 1, were created to facilitate the ranking and comparison of 
Regionalization 9

each potential x-y pair by (1) the number of coincident days 

in which daily flow measurements were made, expressed as a 

fraction of the number of daily flow measurements taken at the 

partial-record site, (2) the value of Spearman’s rank correlation coefficient (rs 

) computed for each partial-record site and 

candidate index site, and (3) a ranking of candidate index-site 

proximity to the partial-record site, relative to the proximity 

of other candidate index sites. An overall ranking of candidate 

index-site, partial-record site x-y pairs, computed as the sum 

of the three separate dimensionless indices, was used to facilitate creation of a list containing the top 20 ranked candidate 

index-site, partial-record site x-y pairs. An orthogonal regression of the common logarithms of the measured instantaneous 

discharge values of the partial-record site against the common 

logarithms of the daily flow values of each of the top 20 candidate index sites was performed using the MOVE.1 method, 

yielding a plot and LOC for each of the top 20 candidate pairs 

for each partial-record site. Each of the candidate x-y pair 

selections contained in the top 20 ranking list for each of the 

626 partial-record regressions was then individually evaluated 

based on the orthogonal regression and additional statistical, 

empirical, and anecdotal information specific to each site. 

Evaluations of each regression included review of statistical 

metrics and visual checks of each regression plot for variance, 

range, and goodness of fit. A best representative index-site, 

partial-record site x-y pair regression was then selected. 

Thirteen (13) index-site, partial-record site x-y pair regressions 

were removed from the final group of relations due to lack of a 

meaningful statistical relation between the paired x-y datasets, 

bringing the total number of index-site, partial-record site x-y 

paired regressions to 613. Low-flow frequencies were then 

described for each partial-record site as the transfer of the 

index-site flow statistic through the orthogonal LOC relation. 

Partial-record site MOVE.1 regression equations are listed in 

table 6 (CD in pocket).

Basin Characteristics

Measurements and statistics describing characteristics 

associated with delineated drainage basins in Virginia were 

developed and compiled for use as possible explanatory 

variables in low-flow regional regression analyses. These 

basin characteristics describing 312 unique attributes for each 

of 3,469 delineated drainage basins form a matrix of 1,082,328 

values. The basin characteristics were compiled using ArcGISTM2

 and data from the following sources: (1) a Virginia 

delineated drainage basin dataset (Hayes and Wiegand, 2006); 

(2) a USGS national hydrography dataset (U.S. Geological 

Survey, 2006); (3) a Natural Resources Conservation Service 

(NRCS) soil statistics dataset (U.S. Department of Agriculture, 

2007); (4) a PRISM climate dataset (PRISM Climate Group, 

2007); (5) a National Oceanic and Atmospheric Administration 

2

 Arc-GIS, ESRI Inc., copyright 1999-2009, ESRI ArcMap 9.3.1 

and ArcInfo Workstation GIS software, ESRI Inc., 380 New York 

Street, Redlands, California 92373-8100, USA.

(NOAA) rainfall intensity and climate dataset (National Oceanic and Atmospheric Administration, 2007; Paybins, 2008); 

(6) a USGS 2005 geology dataset (Dicken and others, 2005); 

(7) a USGS 2007 national elevation dataset (U.S. Geological 

Survey, 2007); and (8) a physiography dataset for the United 

States (Fenneman, 1938). Statistics summarizing basin 

characteristics selected for regional regression of low flows in 

Virginia are listed in table 7 (CD in pocket). A description of 

these basin characteristics, their definitions, and datasources 

can be found in table 8. A table of basin characteristics chosen 

for possible use in candidate regional regression models can 

be found in table 9 (CD in pocket). Drainage-basin boundaries 

were obtained from the delineated drainage basin dataset listed 

above (Hayes and Wiegand, 2006).

Regionalization 

Regional regression analysis was used to develop 

equations for estimating the frequency of low flows at 

ungaged sites in Virginia. These equations relate the annual 

non-exceedance probability flows computed using low-flow 

frequency analysis of data from long-term gages to the 

measured basin characteristics of delineated drainage basins.

Six physiographic regions were used to organize 

regression analyses of basin characteristics against low-flow 

estimates. These six physiographic regions are similar to the 

five physiographic provinces identified in the discussion of 

physical setting except that the Mesozoic Basins, considered 

a subset of the Piedmont Physiographic Province, are identified separately as one of the six physiographic regions. The 

rationale for this organizational framework, that physiographic 

differences expressed in these six regions are related to 

hydrologic response, appeared to be a sound rationale because 

candidate regression models significantly improved across 

the range of low-flow probabilities as a consequence of these 

regressions based on physiographic regions.

Definition of Regions

The six regions delineated and used to evaluate low flows 

are Coastal Plain, Piedmont, Mesozoic Basins, Blue Ridge, 

Valley and Ridge, and Appalachian Plateaus (fig. 1). Each 

region was identified using Arc-GISTM to perform spatial 

separations of the geologic dataset. Regions were selected 

and identified iteratively, based on the improved explanatory 

power of candidate regression models associated with the 

regions across the range of low-flow annual non-exceedance 

probabilities. Exploratory statistical analyses helped improve 

the explanatory power of regional regression models. The 

Mesozoic Basins, usually grouped with the Piedmont physiographic region, were explicitly identified as a unique region 

for the purposes of this study, leading to improved correlations 

among candidate regional regression models. 
10 Low-Flow Characteristics of Virginia Streams

Table 8. Selected basin characteristics, their definitions, and datasources.—Continued

[ft, foot; mi2, square mile; ft/mi, foot per mile; DD, decimal degrees; mi, mile; in., inch]

Basin characteristic Units Definition Datasource

Mean elevation ft The average elevation in the basin. U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Drainage area mi2 Published values of surface drainage area for each basin 

in the study.

Hayes and Wiegand, 2006

Basin slope (ft/mi) The average slope of the basin from upland to outlet. U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Perimeter mi The length of the basin boundary. U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Latitude DD The east-west coordinate at the centroid of the basin 

boundary.

U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Longitude DD The north-south coordinate at the centroid of the basin 

boundary.

U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Elevation ft The distance above sea level associated with the center 

point of the watershed polygon.

U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Basin relief ft The difference between maximum and minimum elevation within the basin.U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Valley length mi The length of the main valley within the basin. U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Channel slope ft/mi The slope of the main chanel within the basin. U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Elevation at 10 percent ft The distance above sea level associated with the main 

channel at 10 percent of the basin drainage area from 

the outlet.

U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Elevation at 85 percent ft The distance above sea level associated with the main 

channel at 85 percent of the basin drainage area from 

the outlet.

U.S. Geological Survey, 2007, National Elevation Data Set (NED)

Stream length mi Length along the main channel from the outlet to the 

basin divide.

U.S. Geological Survey, 2006, National Hydrography Dataset

Forest percent Fraction of basin land area classified as forest. Homer and others, 2004, http://www.mrlc.gov/nlcd.php

Urban percent Fraction of basin land area classified as urban area. Homer and others, 2004, http://www.mrlc.gov/nlcd.php

Agriculture percent Fraction of basin land area classified as agricultural 

land.

Homer and others, 2004, http://www.mrlc.gov/nlcd.php

Wetland percent Fraction of basin land area classified as wetland. Homer and others, 2004, http://www.mrlc.gov/nlcd.php

Water percent Fraction of basin land area classified as surface water. Homer and others, 2004, http://www.mrlc.gov/nlcd.php

Grass percent Fraction of basin land area classified as grassland. Homer and others, 2004, http://www.mrlc.gov/nlcd.php

Bare percent Fraction of basin land area classified as exposed soil. Homer and others, 2004, http://www.mrlc.gov/nlcd.php

Basin area in Coastal 

Plain physiographic 

region

mi2 Area within the Coastal Plain physiographic region. Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Piedmont 

physiographic region

mi2 Area within the Piedmont physiographic region. Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Blue 

Ridge physiographic 

region

mi2 Area within the Blue Ridge physiographic region. Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Valley and 

Ridge physiographic 

region

mi2 Area within the Valley and Ridge physiographic region. Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Appalachian Plateaus physiographic regionmi2 Area within the Appalachian Plateaus physiographic 

region.

Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Mesozoic 

Basins physiographic 

region

mi2 Area within the Mesozoic Basins physiographic region. Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in water mi2 Area covered in surface water. Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Coastal 

Plain physiographic 

region

percent Percent of the basin within the Coastal Plain physiographic region.Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Piedmont 

physiographic region

percent Percent of the basin within the Piedmont physiographic 

region.

Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Blue 

Ridge physiographic 

region

percent Percent of the basin within the Blue Ridge physiographic region.Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005
Regionalization 11

Table 8. Selected basin characteristics, their definitions, and datasources.—Continued

[ft, foot; mi2, square mile; ft/mi, foot per mile; DD, decimal degrees; mi, mile; in., inch]

Basin characteristic Units Definition Datasource

Basin area in Valley and 

Ridge physiographic 

region

percent Percent of the basin within the Valley and Ridge physiographic region.Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Appalachian Plateaus physiographic regionpercent Percent of the basin within the Appalachian Plateaus 

physiographic region.

Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in Mesozoic 

Basins physiographic 

region

percent Percent of the basin within the Mesozoic Basins physiographic region.Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Basin area in water percent Percent of basin area covered in surface water. Fenneman and Johnson, 1946; Mixon and others, 1989; Dicken and 

others, 2005

Mean annual precipitationin. Mean annual precipitation falling on the basin, averaged 

over the whole basin.

PRISM Climate Group, 2007; Paybins, 2008

Mean January–February–March precipitationin. Mean January–February–March precipitation falling on 

the basin, averaged over the whole basin.

PRISM Climate Group, 2007

2-year 24-hour precipitation intensity in. Basin average rainfall at the 24-hour 2-year recurrence 

interval.

National Oceanic and Atmospheric Administration, 2007; Paybins, 

2008

Basin area with 0 percent impervious 

surface 

percent Percent of the basin coded as 0 percent impervious. Yang and others, 2002; Homer and others, 2004

Basin area with 

1–5 percent impervious surface 

percent Percent of the basin coded as 1 to 5 percent impervious. Yang and others, 2002; Homer and others, 2004

Basin area with 

6–10 percent impervious surface 

percent Percent of the basin coded as 6 to 10 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

11–25 percent impervious surface 

percent Percent of the basin coded as 11 to 25 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

26–50 percent impervious surface 

percent Percent of the basin coded as 26 to 50 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

51–75 percent impervious surface 

percent Percent of the basin coded as 51 to 75 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

76–100 percent impervious surface 

percent Percent of the basin coded as 76 to 100 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 0 percent impervious 

surface 

mi2 Area within the basin coded as 0 percent impervious. Yang and others, 2002; Homer and others, 2004

Basin area with 

1–5 percent impervious surface 

mi2 Area within the basin coded as 1 to 5 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

6–10 percent impervious surface 

mi2 Area within the basin coded as 6 to 10 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

11–25 percent impervious surface 

mi2 Area within the basin coded as 11 to 25 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

26–50 percent impervious surface 

mi2 Area within the basin coded as 26 to 50 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

51–75 percent impervious surface 

mi2 Area within the basin coded as 51 to 75 percent impervious.Yang and others, 2002; Homer and others, 2004

Basin area with 

76–100 percent impervious surface 

mi2 Area within the basin coded as 76 to 100 percent 

impervious.

Yang and others, 2002; Homer and others, 2004
12 Low-Flow Characteristics of Virginia Streams

Model Development

Exploratory analyses of all computed P-percent chance 

1-, 4-, 7-, and 30-day averaged low flows and potential 

explanatory variables (basin characteristics) were performed 

prior to developing candidate regression models, using 

statistical software, JMP® version 8.3 Sites with 50 percent 

or more of their drainage area within a region were included 

in developing that region’s regression equations, with the 

exception of the Coastal Plain region in which all sites with 

5 percent or more of their land area within the region were 

included in developing the region’s regression equations. 

Scatter plots showing relations between pairs of basin characteristics were evaluated along with basic descriptive statistics 

to (1) identify explanatory variable pairs that are highly 

correlated with one another so that they may be evaluated and 

possibly removed from the selection dataset and (2) determine 

candidate explanatory variable, response variable pairs that 

are highly correlated with potentially significant explanatory 

power. In some instances, one or both variables in an explanatory variable, response variable pair were mathematically 

transformed to potentially enhance their relation and statistical 

power when part of a linear regression model. Depending on 

the shape of each scatter plot relation, possible transformations of the X variable included 2 3 log , , , and , X XX X

and possible transformations of the Y variable included 2 3 log , , , and , Y YY Y as suggested by “Tukey’s bulging rule” 

(Mosteller and Tukey, 1977). Exploratory statistical investigation and comparison of the 312 candidate explanatory basin 

characteristics associated with each P-percent chance 1-, 4-, 

7-, and 30-day averaged low-flow value proceeded iteratively 

until each candidate variable, low-flow value x-y pair was 

vetted for possible explanatory power.

Candidate regional regression models were developed 

following an iterative approach. For each region, and for each 

1-, 4-, 7-, and 30-day averaged low-flow response variable, 

forward-, backward-, and mixed-stepwise regressions were 

used to identify combinations of basin characteristics with 

likely explanatory power. A list of all possible 1-, 2-, and 

3-parameter candidate models was prepared for each 1-, 4-, 7-, 

and 30-day averaged P-percent chance low-flow response variable. The list of candidate models was sorted by the number of 

explanatory variables in each model. Then, candidate models 

in each sub-list were evaluated using three metrics—the 

coefficient of determination (R-square), the root mean square 

error (RMSE), and Akaike’s information criterion (AIC), 

modified with a second-order correction for small sample sizes 

and identified as AICc, (Burnham and Anderson, 2002). The 

most reasonable 1-, 2-, and 3-parameter models for each 1-, 

4-, 7-, and 30-day averaged P-percent chance low flow in each 

region were chosen as final candidates for regional regression. 

Final 1-, 2-, and 3-parameter regional regression models 

were prepared using statistical software (JMP® version 8). 

Explanatory variables for any 2- and 3-parameter models were 

3

 SAS Institute Inc., 2009, Cary, North Carolina.

carefully chosen to ensure that each variable in the model 

contributed adequate explanatory power and to avoid instances 

of collinearity, autocorrelation, or excessive variance inflation. 

Regional regression models were evaluated and modified 

iteratively. Final models were then selected. Coefficients of 

final models were specified using the weighted least squares 

(WLS) option of the Weighted-Multiple-Linear Regression 

Program (WREG, version 1.01; Eng and others, 2009). Preference was given to regional regression models with explanatory 

variables that are easily determined and understood. Models 

with little explanatory power and high standard errors were 

not reported.

Model Verification and Diagnostics

Evaluation of candidate models using R-square, RMSE, 

and AICc provided insights into the most appropriate candidate model choices for each 1-, 4-, 7-, and 30-day averaged 

P-percent chance low-flow response variable in each region. 

The R-square value indicated the proportion of variability 

in each relation that was accounted for by the statistical 

model—in this case, a linear regression model. R-square 

values approaching 1 suggested increased explanatory power. 

The RMSE value indicated the differences between values 

predicted by each model and the values actually observed or 

measured. The RMSE helped to aggregate individual residual 

differences into a single measure of predictive power. To 

assist in choosing among candidate models in each region, 

plots were constructed identifying each candidate model by 

the number of model parameters (x-axis) and RMSE value 

(y-axes), providing a spatial representation of increased or 

decreased RMSE relative to the number of model terms. The 

AICc value indicated the goodness of fit of each regression 

model, relative to other candidate models in the list, providing 

a tool for model selection. AICc values are grounded in the 

concept of entropy, offering a relative measure of the information lost when a given model is used to describe reality. 

AICc describes the difference between model bias and model 

variance, or the tradeoff between model precision and model 

complexity. Several competing models may be ranked by their 

AICc values. Lower AICc values were considered better than 

higher values.

Leverage plots (Sall, 1990), also known as “partialregression residual leverage plots” (Belsley and others, 1980) 

or “added variable plots” (Cook and Weisberg, 1982), were 

used to further investigate and screen candidate regional 

regression models. Leverage plots allow one to view the 

significance of each model parameter in the candidate regression model within the context of the larger model. The effect 

of a model parameter on the larger model is displayed on the 

leverage plot by comparing the sum of squared residuals of 

the model to the sum of squared residuals of the model with 

the effect of interest removed. Residual errors that are smaller 

when the effect of a particular parameter is included in the 

model help confirm that the effect contributes significantly 
Regionalization 13

to the model fit. The leverage plot graphically displays this 

potential significance for each candidate explanatory variable, 

showing for each point in the model what the residual would 

be with and without the effect in the model. In the leverage 

plot, the distance from a point to the line of fit describes the 

actual residual. The distance from a point to the horizontal 

line of the mean describes the potential residual error if the 

effect were not part of the model. In other words, the mean 

line of the leverage plot represents the model if the value of 

the parameter effect were constrained to zero. The idea is 

to determine if the line of fit on the leverage plot for each 

explanatory variable carries each point on the plot significantly 

better than does the horizontal line of the mean shown on 

the plot. Leverage plots were used to identify (1) regression 

variables with significant explanatory power, (2) regression 

variables with borderline or insignificant explanatory power, 

and (3) regression variables exhibiting significant collinearity 

within the model (fig. 2).

Analyses of leverage plots for each potential explanatory 

variable in a candidate regression model afforded the opportunity to see the characteristics of each candidate variable, 

the influential strength of the variable, and its consequences 

within the larger model. The picture provided by each leverage 

plot enabled a thorough, visual vetting of individual candidate 

model variables and a measure of confidence in variable 

selection that could not be obtained from non-graphical 

indices of collinearity and variable inflation, preparing a 

means to construct robust regional regressions. A leverage plot 

was constructed and evaluated for each model parameter in 

each candidate regional regression model. Models containing 

explanatory variables with significant explanatory power, 

limited parameter counts, and limited collinearity were 

preferred as final candidates.

Explanatory variables associated with the best candidate 

models were chosen for inclusion in final candidate singleparameter and multi-parameter regional regression models. 

Preference was given to explanatory variables that are easily 

measured and understood.

Final models were specified using WLS regression (Eng 

and others, 2009). Weights were formed as described in the 

Weighted-Multiple-Linear Regression Program (WREG, version 1.01). Candidate regional regressions and their associated 

leverage plots were carefully evaluated to avoid the effects 

of potential cross correlation between sites and excessive 

variability in low flows at streamgaging stations.

Because the length of streamflow record varies among 

streamgages, the precision of streamflow estimates also 

varies. Different streamflow records have different variances. 

Concurrent flows observed at different gages in a region can 

yield cross correlations. If these correlations are not accounted 

for in a regional analysis, regression parameters may be less 

precise, and estimators of precision may be less accurate (Eng 

and others, 2009).

WLS analyses account for cross correlations among 

characteristics. Weights are formed using the period of 

record and the variance of the response variable annual time 

Figure 2. Example leverage plots showing (A) significant 

explanatory power, (B) insignificant explanatory power, and 

(C) evidence of collinearity. The solid red lines represent the 

significance of each explanatory model parameter, shown on the 

x-axis, within the context of the larger model. The dashed red 

lines represent the confidence interval of the significance of each 

explanatory model parameter. The dashed blue lines represent the 

horizontal line of the mean, describing the larger model if the effect 

of each explanatory model parameter were constrained to zero. 

The idea behind each leverage plot is to determine if the line of fit 

for each potential explanatory model variable carries each point on 

the plot significantly better than does the horizontal line of the mean 

shown on the plot.

5.0

4.5

4.0

3.5

3.0

2.5

2.0

0 1

log10 drainage area, in square miles

Leverage, P<0.0001

2 3

–1 0

log10 channel slope, in feet per mile

Leverage, P=0.8909

1 2 3

log10 perimeter, in miles

Leverage, P=0.2977

1 2

log10 low flow

5.5

5.0

4.5

4.0

3.5

3.0

2.5

log10 low flow

4

3

2

log10 low flow

Figure 2. Example leverage plots showing (a) significant explanat

power, (b) insignificant explanatory power and, (c) evidence of col

The solid red lines represent the significance of each explanatory 

parameter, shown on the x-axis, within the context of the larger mo

dashed red lines represent the confidence interval of the significa

each explanatory model parameter. The dashed blue lines represe

horizontal line of the mean, describing the larger model if the effec

each explanatory model parameter were constrained to zero. The 

behind each leverage plot is to determine if the line of fit for each p

explanatory model variable carries each point on the plot significa

better than does the horizontal line of the mean shown on the plot.

A

B

C
14 Low-Flow Characteristics of Virginia Streams

series. The series of annual 1-, 4-, 7-, and 30-day averaged 

P-percent chance low flows at streamgaging stations and the 

geographic distances between streamgages are examined to 

help determine the degree of potential correlation between 

sites. Weights are assigned to account for variability. Sites 

exhibiting potentially cross-correlated, concurrent low flows 

are given less weight than other sites. Pseudo R-square is 

reported for each WLS regression model. A metric in the style 

of the R-square commonly reported as part of ordinary least 

squares regression, pseudo R-square is designed specifically to 

evaluate the iterative models developed using WREG.

The average variance of prediction (AVP; Stedinger 

and Tasker, 1985; Tasker and Stedinger, 1989) is a helpful 

indication of the average error of a regression. The AVP may 

be represented by one of two equations. The first option is

( ) 1

1

1

1 ,

n T TT

i i

n

AVP x X X X

n

σ −

=

  =+ ∧    ∑

where

AVP = the average variance of prediction, T σ i = the model error variance,

n = the number of streamgaging stations in the 

regression model,

x = the vector containing the basin attributes of 

the ith station augmented by the value of 

one,

X = the matrix of all basin attributes at all 

streamgaging stations in the regression 

augmented by a column of ones,

∧ = the weighting matrix (Tasker and Stedinger, 

1989), T = superscript indicating taking the transpose of 

a matrix, and –1 = superscript indicating taking the inverse of a 

matrix.

The second option is

, AVP error error = + m t

where

AVP = the average variance of prediction,

errorm = model error, and

errort = time sampling error.

The AVP may be used to provide an estimate of errors 

that may be associated with the use of a regression model 

to estimate flow statistics at an ungaged site. An important 

consideration is that the AVP metric assumes that basin 

characteristics at the ungaged location are similar to those 

used to develop the model.

(3)

(4)

The average standard error of prediction in percent, Sp, 

is used in this report to express the AVP as a percentage. Sp

is computed from the AVP (Aitchison and Brown, 1957) and 

modified for use with common logarithms as follows:

( )2 2 100 ln 10 1, p S EXP = •−   σ

 

where:

Sp = the average standard error of prediction, in 

percent; and 2 σ = the average variance of prediction.

Regionalization yielded well-correlated low-flow 

regression equations in each of the six regions using computed 

low-flow statistics from sites listed in table 1 and selected 

basin characteristics. Candidate regional regression equations 

describing 1-, 4-, 7-, and 30-day average low flows in the 

Mesozoic Basins yielded the highest median R-square values 

of 0.80, 0.81, 0.82, and 0.86 and lowest median root mean 

square error values of 0.48, 0.48, 0.47, and 0.40, respectively. 

Candidate regional regression equations describing 1-, 4-, 

7-, and 30-day average low flows in the Blue Ridge yielded 

median R-square of 0.74, 0.79, 0.79, and 0.83 and median root 

mean square error of 0.53, 0.47, 0.48, and 0.41, respectively. 

Candidate regional regression equations describing 1-, 4-, 7-, 

and 30-day average low flows in the Valley and Ridge yielded 

median R-square of 0.76, 0.78, 0.77, and 0.80 and median root 

mean square error of 0.40, 0.39, 0.39, and 0.36, respectively. 

Candidate regional regression equations describing 1-, 4-, 

7-, and 30-day average low flow in the Piedmont, excluding 

the Mesozoic Basins located within the Piedmont, yielded 

median R-square of 0.65, 0.66, 0.68, and 0.70 and median root 

mean square error of 0.67, 0.66, 0.65, and 0.61, respectively. 

Candidate regional regression equations describing 1-, 4-, 

7-, and 30-day average low flow in the Coastal Plain yielded 

median R-square of 0.58, 0.59, 0.65, and 0.65 and median root 

mean square error of 0.61, 0.63, 0.55, and 0.53, respectively. 

Candidate regional regression equations describing 1-, 4-, 7-, 

and 30-day average low flows in the Appalachian Plateaus 

yielded median R-square of 0.49, 0.59, 0.57, and 0.68 and 

median root mean square error of 0.45, 0.32, 0.33, and 0.25, 

respectively. Regional regression equations are found in 

table 10.

(5)
Regionalization 15

Table 10. Regional regression equations for estimating low flows of streams in Virginia.—Continued

[DA, basin drainage area in square miles]

Pseudo R-squarea

Average standard 

error of 

predictiona

(percent)

Standard model 

errora

(percent)

Virginia basins in the Coastal Plain region

Log10LF1Day(0.9) = -0.857 + 0.961 • Log10(DA) 0.88 71 66

Log10LF1Day(0.8) = -1.021 + 0.952 • Log10(DA) 0.82 94 88

Log10LF1Day(0.7) = -1.177 + 0.954 • Log10(DA) 0.77 118 110

Log10LF1Day(0.6) = -1.326 + 0.957 • Log10(DA) 0.72 148 136

Log10LF1Day(0.5) = -1.482 + 0.96 • Log10(DA) 0.65 194 176

Log10LF1Day(0.4) = -1.692 + 0.964 • Log10(DA) 0.50 396 342

Log10LF4Day(0.9) = -0.601 + 0.89 • Log10(DA) 0.89 62 60

Log10LF4Day(0.8) = -0.747 + 0.875 • Log10(DA) 0.85 77 74

Log10LF4Day(0.7) = -0.883 + 0.87 • Log10(DA) 0.81 94 90

Log10LF4Day(0.6) = -1.013 + 0.867 • Log10(DA) 0.76 113 108

Log10LF4Day(0.5) = -1.144 + 0.86 • Log10(DA) 0.70 140 133

Log10LF4Day(0.4) = -1.308 + 0.849 • Log10(DA) 0.57 237 221

Log10LF7Day(0.9) = -0.538 + 0.884 • Log10(DA) 0.91 56 54

Log10LF7Day(0.8) = -0.695 + 0.874 • Log10(DA) 0.87 70 67

Log10LF7Day(0.7) = -0.83 + 0.87 • Log10(DA) 0.83 85 81

Log10LF7Day(0.6) = -0.966 + 0.869 • Log10(DA) 0.79 102 98

Log10LF7Day(0.5) = -1.106 + 0.868 • Log10(DA) 0.73 127 121

Log10LF7Day(0.4) = -1.255 + 0.859 • Log10(DA) 0.64 183 173

Log10LF30Day(0.9) = -0.335 + 0.917 • Log10(DA) 0.96 35 33

Log10LF30Day(0.8) = -0.461 + 0.897 • Log10(DA) 0.95 41 40

Log10LF30Day(0.7) = -0.578 + 0.887 • Log10(DA) 0.92 53 51

Log10LF30Day(0.6) = -0.686 + 0.876 • Log10(DA) 0.88 66 64

Log10LF30Day(0.5) = -0.8 + 0.867 • Log10(DA) 0.83 84 80

Log10LF30Day(0.4) = -0.93 + 0.858 • Log10(DA) 0.77 110 105

Log10LF30Day(0.3) = -1.072 + 0.837 • Log10(DA) 0.65 169 160

Virginia basins in the Piedmont region, except those within the Mesozoic Basins

Log10LF1Day(0.9) = -0.699 + 0.991 • Log10(DA) 0.83 112 109

Log10LF1Day(0.8) = -0.901 + 1.021 • Log10(DA) 0.80 135 131

Log10LF1Day(0.7) = -1.06 + 1.044 • Log10(DA) 0.78 156 151

Log10LF1Day(0.6) = -1.209 + 1.067 • Log10(DA) 0.76 178 173

Log10LF1Day(0.5) = -1.367 + 1.091 • Log10(DA) 0.74 207 199

Log10LF4Day(0.9) = -0.353 + 0.86 • Log10(DA) 0.71 130 126

Log10LF4Day(0.8) = -0.477 + 0.868 • Log10(DA) 0.68 148 142

Log10LF4Day(0.7) = -0.588 + 0.878 • Log10(DA) 0.65 167 160

Log10LF4Day(0.6) = -0.705 + 0.892 • Log10(DA) 0.63 189 181

Log10LF4Day(0.5) = -0.84 + 0.911 • Log10(DA) 0.60 220 209

Log10LF4Day(0.4) = -1.03 + 0.947 • Log10(DA) 0.57 274 259

Log10LF7Day(0.9) = -0.252 + 0.857 • Log10(DA) 0.78 101 98

Log10LF7Day(0.8) = -0.38 + 0.869 • Log10(DA) 0.75 113 109

Log10LF7Day(0.7) = -0.483 + 0.878 • Log10(DA) 0.73 123 119

Log10LF7Day(0.6) = -0.583 + 0.888 • Log10(DA) 0.72 134 130

Log10LF7Day(0.5) = -0.683 + 0.898 • Log10(DA) 0.70 146 141

Log10LF7Day(0.4) = -0.796 + 0.911 • Log10(DA) 0.69 159 153

Log10LF7Day(0.3) = -0.926 + 0.924 • Log10(DA) 0.67 175 169

Log10LF7Day(0.2) = -1.102 + 0.945 • Log10(DA) 0.65 199 190

Log10LF7Day(0.1) = -1.385 + 0.981 • Log10(DA) 0.63 242 231

Log10LF7Day(0.05) = -1.654 + 1.015 • Log10(DA) 0.60 302 286

Log10LF30Day(0.9) = -0.336 + 0.944 • Log10(DA) 0.88 82 80

Log10LF30Day(0.8) = -0.514 + 0.97 • Log10(DA) 0.87 93 91

Log10LF30Day(0.7) = -0.667 + 0.994 • Log10(DA) 0.85 106 103
16 Low-Flow Characteristics of Virginia Streams

Table 10. Regional regression equations for estimating low flows of streams in Virginia.—Continued

[DA, basin drainage area in square miles]

Pseudo R-squarea

Average standard 

error of 

predictiona

(percent)

Standard model 

errora

(percent)

Virginia basins in the Piedmont region, except those within the Mesozoic Basins (Continued)

Log10LF30Day(0.6) = -0.807 + 1.017 • Log10(DA) 0.84 119 116

Log10LF30Day(0.5) = -0.963 + 1.047 • Log10(DA) 0.82 136 133

Log10LF30Day(0.4) = -1.101 + 1.065 • Log10(DA) 0.80 156 152

Virginia basins in the Blue Ridge region

Log10LF1Day(0.9) = -0.705 + 1.107 • Log10(DA) 0.93 44 43

Log10LF1Day(0.8) = -0.881 + 1.137 • Log10(DA) 0.91 54 53

Log10LF1Day(0.7) = -1.025 + 1.162 • Log10(DA) 0.89 63 61

Log10LF1Day(0.6) = -1.162 + 1.188 • Log10(DA) 0.87 72 70

Log10LF1Day(0.5) = -1.305 + 1.215 • Log10(DA) 0.85 81 79

Log10LF1Day(0.4) = -1.462 + 1.247 • Log10(DA) 0.83 92 89

Log10LF1Day(0.3) = -1.651 + 1.286 • Log10(DA) 0.81 106 102

Log10LF1Day(0.2) = -1.892 + 1.338 • Log10(DA) 0.78 126 121

Log10LF1Day(0.1) = -2.293 + 1.429 • Log10(DA) 0.75 167 160

Log10LF4Day(0.9) = -0.689 + 1.118 • Log10(DA) 0.93 45 43

Log10LF4Day(0.8) = -0.858 + 1.148 • Log10(DA) 0.91 55 53

Log10LF4Day(0.7) = -0.998 + 1.174 • Log10(DA) 0.89 64 62

Log10LF4Day(0.6) = -1.134 + 1.201 • Log10(DA) 0.87 73 71

Log10LF4Day(0.5) = -1.274 + 1.229 • Log10(DA) 0.85 83 80

Log10LF4Day(0.4) = -1.427 + 1.26 • Log10(DA) 0.83 94 91

Log10LF4Day(0.3) = -1.611 + 1.3 • Log10(DA) 0.81 108 104

Log10LF4Day(0.2) = -1.854 + 1.353 • Log10(DA) 0.78 128 124

Log10LF4Day(0.1) = -2.25 + 1.445 • Log10(DA) 0.75 169 162

Log10LF4Day(0.05) = -2.682 + 1.554 • Log10(DA) 0.72 228 216

Log10LF7Day(0.9) = -0.657 + 1.119 • Log10(DA) 0.93 44 43

Log10LF7Day(0.8) = -0.83 + 1.15 • Log10(DA) 0.91 54 53

Log10LF7Day(0.7) = -0.971 + 1.177 • Log10(DA) 0.89 63 61

Log10LF7Day(0.6) = -1.107 + 1.204 • Log10(DA) 0.87 72 70

Log10LF7Day(0.5) = -1.246 + 1.232 • Log10(DA) 0.85 82 80

Log10LF7Day(0.4) = -1.4 + 1.264 • Log10(DA) 0.83 93 90

Log10LF7Day(0.3) = -1.582 + 1.303 • Log10(DA) 0.81 107 104

Log10LF7Day(0.2) = -1.82 + 1.355 • Log10(DA) 0.79 127 122

Log10LF7Day(0.1) = -2.199 + 1.441 • Log10(DA) 0.75 165 158

Log10LF7Day(0.05) = -2.589 + 1.535 • Log10(DA) 0.72 217 206

Log10LF30Day(0.9) = -0.489 + 1.096 • Log10(DA) 0.95 35 34

Log10LF30Day(0.8) = -0.661 + 1.126 • Log10(DA) 0.93 43 42

Log10LF30Day(0.7) = -0.798 + 1.151 • Log10(DA) 0.92 51 49

Log10LF30Day(0.6) = -0.924 + 1.174 • Log10(DA) 0.90 58 57

Log10LF30Day(0.5) = -1.049 + 1.198 • Log10(DA) 0.88 66 64

Log10LF30Day(0.4) = -1.184 + 1.225 • Log10(DA) 0.87 75 72

Log10LF30Day(0.3) = -1.34 + 1.258 • Log10(DA) 0.85 85 83

Log10LF30Day(0.2) = -1.533 + 1.298 • Log10(DA) 0.82 100 96

Log10LF30Day(0.1) = -1.829 + 1.361 • Log10(DA) 0.79 126 121

Log10LF30Day(0.05) = -2.111 + 1.425 • Log10(DA) 0.76 156 149

Log10LF30Day(0.02) = -2.462 + 1.508 • Log10(DA) 0.72 206 196

Log10LF30Day(0.01) = -2.703 + 1.564 • Log10(DA) 0.70 252 238

Log10LF30Day(0.005) = -2.855 + 1.589 • Log10(DA) 0.68 294 277

Virginia basins in the Valley and Ridge region

Log10LF1Day(0.9) = -0.794 + 1.064 • Log10(DA) 0.88 54 52

Log10LF1Day(0.8) = -0.907 + 1.081 • Log10(DA) 0.86 60 58

Log10LF1Day(0.7) = -0.993 + 1.094 • Log10(DA) 0.85 65 63

Log10LF1Day(0.6) = -1.071 + 1.106 • Log10(DA) 0.84 69 68
Regionalization 17

Table 10. Regional regression equations for estimating low flows of streams in Virginia.—Continued

[DA, basin drainage area in square miles]

Pseudo R-squarea

Average standard 

error of 

predictiona

(percent)

Standard model 

errora

(percent)

Virginia basins in the Valley and Ridge region (Continued)

Log10LF1Day(0.5) = -1.148 + 1.119 • Log10(DA) 0.82 74 72

Log10LF1Day(0.4) = -1.227 + 1.132 • Log10(DA) 0.81 79 77

Log10LF1Day(0.3) = -1.316 + 1.147 • Log10(DA) 0.80 86 83

Log10LF1Day(0.2) = -1.427 + 1.166 • Log10(DA) 0.78 94 92

Log10LF1Day(0.1) = -1.592 + 1.195 • Log10(DA) 0.75 109 106

Log10LF1Day(0.05) = -1.747 + 1.224 • Log10(DA) 0.71 128 124

Log10LF4Day(0.9) = -0.781 + 1.068 • Log10(DA) 0.89 52 51

Log10LF4Day(0.8) = -0.894 + 1.084 • Log10(DA) 0.87 58 57

Log10LF4Day(0.7) = -0.98 + 1.097 • Log10(DA) 0.85 63 62

Log10LF4Day(0.6) = -1.056 + 1.109 • Log10(DA) 0.84 68 66

Log10LF4Day(0.5) = -1.13 + 1.121 • Log10(DA) 0.83 73 71

Log10LF4Day(0.4) = -1.206 + 1.134 • Log10(DA) 0.82 78 76

Log10LF4Day(0.3) = -1.292 + 1.15 • Log10(DA) 0.80 84 82

Log10LF4Day(0.2) = -1.397 + 1.169 • Log10(DA) 0.78 93 90

Log10LF4Day(0.1) = -1.547 + 1.197 • Log10(DA) 0.75 107 104

Log10LF4Day(0.05) = -1.68 + 1.224 • Log10(DA) 0.73 121 117

Log10LF4Day(0.02) = -1.84 + 1.257 • Log10(DA) 0.70 142 137

Log10LF4Day(0.01) = -1.959 + 1.283 • Log10(DA) 0.68 160 155

Log10LF4Day(0.005) = -2.052 + 1.301 • Log10(DA) 0.66 179 172

Log10LF4Day(0.002) = -2.19 + 1.332 • Log10(DA) 0.63 209 201

Log10LF4Day(0.001) = -2.289 + 1.354 • Log10(DA) 0.61 233 223

Log10LF7Day(0.9) = -0.767 + 1.066 • Log10(DA) 0.89 51 50

Log10LF7Day(0.8) = -0.883 + 1.083 • Log10(DA) 0.88 57 55

Log10LF7Day(0.7) = -0.97 + 1.096 • Log10(DA) 0.86 62 60

Log10LF7Day(0.6) = -1.047 + 1.109 • Log10(DA) 0.85 66 65

Log10LF7Day(0.5) = -1.121 + 1.121 • Log10(DA) 0.84 71 69

Log10LF7Day(0.4) = -1.197 + 1.134 • Log10(DA) 0.82 76 74

Log10LF7Day(0.3) = -1.281 + 1.148 • Log10(DA) 0.81 82 80

Log10LF7Day(0.2) = -1.385 + 1.168 • Log10(DA) 0.79 90 88

Log10LF7Day(0.1) = -1.533 + 1.196 • Log10(DA) 0.77 103 100

Log10LF7Day(0.05) = -1.659 + 1.221 • Log10(DA) 0.74 117 113

Log10LF7Day(0.02) = -1.81 + 1.251 • Log10(DA) 0.71 135 131

Log10LF7Day(0.01) = -1.91 + 1.271 • Log10(DA) 0.69 151 146

Log10LF7Day(0.005) = -2.011 + 1.293 • Log10(DA) 0.67 168 162

Log10LF7Day(0.002) = -2.14 + 1.321 • Log10(DA) 0.65 194 186

Log10LF7Day(0.001) = -2.23 + 1.341 • Log10(DA) 0.63 216 207

Log10LF30Day(0.9) = -0.614 + 1.046 • Log10(DA) 0.92 41 41

Log10LF30Day(0.8) = -0.75 + 1.066 • Log10(DA) 0.90 48 47

Log10LF30Day(0.7) = -0.846 + 1.08 • Log10(DA) 0.88 53 52

Log10LF30Day(0.6) = -0.926 + 1.093 • Log10(DA) 0.87 58 57

Log10LF30Day(0.5) = -1.002 + 1.105 • Log10(DA) 0.86 63 61

Log10LF30Day(0.4) = -1.075 + 1.116 • Log10(DA) 0.84 68 66

Log10LF30Day(0.3) = -1.154 + 1.129 • Log10(DA) 0.83 73 72

Log10LF30Day(0.2) = -1.245 + 1.144 • Log10(DA) 0.81 80 78

Log10LF30Day(0.1) = -1.372 + 1.167 • Log10(DA) 0.79 91 89

Log10LF30Day(0.05) = -1.474 + 1.185 • Log10(DA) 0.76 101 98

Log10LF30Day(0.02) = -1.588 + 1.205 • Log10(DA) 0.74 114 111

Log10LF30Day(0.01) = -1.669 + 1.221 • Log10(DA) 0.72 124 120

Log10LF30Day(0.005) = -1.737 + 1.234 • Log10(DA) 0.71 134 130

Log10LF30Day(0.002) = -1.818 + 1.249 • Log10(DA) 0.69 148 143

Log10LF30Day(0.001) = -1.888 + 1.265 • Log10(DA) 0.67 160 154
18 Low-Flow Characteristics of Virginia Streams

Table 10. Regional regression equations for estimating low flows of streams in Virginia.—Continued

[DA, basin drainage area in square miles]

Pseudo R-squarea

Average standard 

error of 

predictiona

(percent)

Standard model 

errora

(percent)

Virginia basins in the Appalachian Plateaus region

Log10LF1Day(0.9) = -0.413 + 0.836 • Log10(DA) 0.91 29 26

Log10LF1Day(0.8) = -0.557 + 0.847 • Log10(DA) 0.86 36 33

Log10LF1Day(0.7) = -0.68 + 0.859 • Log10(DA) 0.82 43 40

Log10LF1Day(0.6) = -0.801 + 0.874 • Log10(DA) 0.77 51 47

Log10LF1Day(0.5) = -0.933 + 0.894 • Log10(DA) 0.72 60 55

Log10LF1Day(0.4) = -1.079 + 0.917 • Log10(DA) 0.68 70 64

Log10LF1Day(0.3) = -1.264 + 0.951 • Log10(DA) 0.63 84 76

Log10LF1Day(0.2) = -1.516 + 1.002 • Log10(DA) 0.57 106 96

Log10LF1Day(0.1) = -2.104 + 1.158 • Log10(DA) 0.44 200 174

Log10LF4Day(0.9) = -0.434 + 0.864 • Log10(DA) 0.91 30 27

Log10LF4Day(0.8) = -0.554 + 0.864 • Log10(DA) 0.87 37 34

Log10LF4Day(0.7) = -0.661 + 0.87 • Log10(DA) 0.82 44 40

Log10LF4Day(0.6) = -0.766 + 0.878 • Log10(DA) 0.78 52 47

Log10LF4Day(0.5) = -0.882 + 0.89 • Log10(DA) 0.73 60 55

Log10LF4Day(0.4) = -1.015 + 0.907 • Log10(DA) 0.69 70 63

Log10LF4Day(0.3) = -1.179 + 0.933 • Log10(DA) 0.64 82 75

Log10LF4Day(0.2) = -1.393 + 0.967 • Log10(DA) 0.58 101 91

Log10LF4Day(0.1) = -1.758 + 1.037 • Log10(DA) 0.51 139 122

Log10LF4Day(0.05) = -2.138 + 1.121 • Log10(DA) 0.46 190 163

Log10LF4Day(0.02) = -2.573 + 1.212 • Log10(DA) 0.41 288 238

Log10LF4Day(0.01) = -3.074 + 1.356 • Log10(DA) 0.39 433 342

Log10LF7Day(0.9) = -0.461 + 0.887 • Log10(DA) 0.92 30 27

Log10LF7Day(0.8) = -0.556 + 0.878 • Log10(DA) 0.87 37 33

Log10LF7Day(0.7) = -0.643 + 0.875 • Log10(DA) 0.83 43 39

Log10LF7Day(0.6) = -0.731 + 0.876 • Log10(DA) 0.79 50 46

Log10LF7Day(0.5) = -0.829 + 0.881 • Log10(DA) 0.74 57 52

Log10LF7Day(0.4) = -0.941 + 0.89 • Log10(DA) 0.70 66 60

Log10LF7Day(0.3) = -1.081 + 0.906 • Log10(DA) 0.65 77 70

Log10LF7Day(0.2) = -1.275 + 0.933 • Log10(DA) 0.59 94 84

Log10LF7Day(0.1) = -1.598 + 0.986 • Log10(DA) 0.51 127 113

Log10LF7Day(0.05) = -1.902 + 1.04 • Log10(DA) 0.45 171 148

Log10LF7Day(0.02) = -2.301 + 1.117 • Log10(DA) 0.39 256 214

Log10LF7Day(0.01) = -2.583 + 1.17 • Log10(DA) 0.35 353 285

Log10LF7Day(0.005) = -2.87 + 1.227 • Log10(DA) 0.32 505 390

Log10LF30Day(0.9) = -0.505 + 0.986 • Log10(DA) 0.97 21 19

Log10LF30Day(0.8) = -0.57 + 0.962 • Log10(DA) 0.95 25 23

Log10LF30Day(0.7) = -0.624 + 0.944 • Log10(DA) 0.92 30 27

Log10LF30Day(0.6) = -0.678 + 0.931 • Log10(DA) 0.90 34 31

Log10LF30Day(0.5) = -0.732 + 0.917 • Log10(DA) 0.87 39 36

Log10LF30Day(0.4) = -0.792 + 0.905 • Log10(DA) 0.83 45 41

Log10LF30Day(0.3) = -0.866 + 0.894 • Log10(DA) 0.78 53 48

Log10LF30Day(0.2) = -0.96 + 0.882 • Log10(DA) 0.71 64 58

Log10LF30Day(0.1) = -1.119 + 0.873 • Log10(DA) 0.59 88 79

Log10LF30Day(0.05) = -1.263 + 0.866 • Log10(DA) 0.48 117 104

Log10LF30Day(0.02) = -1.466 + 0.871 • Log10(DA) 0.36 171 149

Log10LF30Day(0.01) = -1.597 + 0.869 • Log10(DA) 0.28 230 195

Log10LF30Day(0.005) = -1.714 + 0.863 • Log10(DA) 0.22 317 260

Log10LF30Day(0.002) = -1.884 + 0.866 • Log10(DA) 0.16 491 384

Log10LF30Day(0.001) = -2.235 + 0.963 • Log10(DA) 0.14 851 621
Weighting Multiple Estimates 19

Table 10. Regional regression equations for estimating low flows of streams in Virginia.—Continued

[DA, basin drainage area in square miles]

Pseudo R-squarea

Average standard 

error of 

predictiona

(percent)

Standard model 

errora

(percent)

Virginia basins in the Mesozoic Basins region

Log10LF1Day(0.9) = -1.276 + 1.213 • Log10(DA) 0.91 71 69

Log10LF1Day(0.8) = -1.508 + 1.253 • Log10(DA) 0.89 84 81

Log10LF1Day(0.7) = -1.689 + 1.284 • Log10(DA) 0.88 96 93

Log10LF1Day(0.6) = -1.857 + 1.314 • Log10(DA) 0.86 109 106

Log10LF1Day(0.5) = -2.033 + 1.346 • Log10(DA) 0.85 126 121

Log10LF1Day(0.4) = -2.241 + 1.387 • Log10(DA) 0.82 150 145

Log10LF4Day(0.9) = -1.226 + 1.209 • Log10(DA) 0.94 70 68

Log10LF4Day(0.8) = -1.461 + 1.254 • Log10(DA) 0.93 81 79

Log10LF7Day(0.9) = -1.091 + 1.176 • Log10(DA) 0.94 67 65

Log10LF7Day(0.8) = -1.36 + 1.234 • Log10(DA) 0.93 76 74

Log10LF7Day(0.7) = -1.464 + 1.243 • Log10(DA) 0.92 85 82

Log10LF7Day(0.6) = -1.557 + 1.249 • Log10(DA) 0.91 94 91

Log10LF30Day(0.9) = -0.792 + 1.123 • Log10(DA) 0.96 52 50

Log10LF30Day(0.8) = -0.991 + 1.155 • Log10(DA) 0.95 60 58

Log10LF30Day(0.7) = -1.166 + 1.187 • Log10(DA) 0.94 66 64

a

 Weighted-multiple-linear regression.

Weighting Multiple Estimates 

Weighting techniques may improve flow estimates. Lowflow estimates may be improved by computing a weighted 

average of two independent estimates: (1) an estimate made by 

fitting a Log-Pearson Type III probability distribution to each 

vetted annual low-flow time series and adjusting it to account 

for zero flows, yielding an unconditional-probability curve, 

and (2) an estimate made by developing a regional regression 

equation describing streamgaging station low flows.

Weighting of Independent Estimates

A weighted estimate and variance at each low-flow 

station was calculated using information from low-flow 

frequency analysis and a corresponding regional regression 

equation. The equations developed in 1974 by Gilroy (Interagency Advisory Committee on Water Data, 1982, p. 8-1 of 

appendix 1 and p. 8-1 of appendix 8) were used to determine 

the weighted discharge and variance of low flows at each 

streamgaging station. The recommended procedure assumes 

that the two low-flow estimates are independent, which is true 

in most practical situations (Interagency Advisory Committee 

on Water Data, 1982; Cohn and others, 2001; Berenbrock, 

2002).

The idea is that if two independent estimates are 

weighted in inverse proportion to their variances, then the 

variance of the weighted average is less than the variance 

of either estimate. This is accomplished using the following 

equations:

( ) y x ( )

y x

xV yV Z

V V

+ = +

and

, x y

z

x y

V V

V

V V

= +

where

x = a first independent estimate of low flow,

y = a second independent estimate of low flow,

Z = a weighted average estimate of low flow,

Vx = variance of a first independent estimate of 

low flow,

Vy = variance of a second independent estimate of 

low flow, and

Vz = variance of a weighted average estimate of 

low flow.

(6)

(7)
20 Low-Flow Characteristics of Virginia Streams

Low-flow estimates determined using Log-Pearson 

Type III frequency analysis of long-term gages were used with 

low-flow estimates determined by regional regression equations from table 10 to yield the weighted low-flow estimates. 

These three low-flow estimates from (1) Log-Pearson Type III 

frequency analysis, (2) regional regression analysis, and 

(3) weighting the combined Log-Pearson Type III and regional 

regression estimates are listed in table 4 for long-term, 

continuous-record streamgaging stations.

Low-Flow Characteristics

Low-flow characteristics are found in tables 4, 11, and 12 

(CD in pocket). Low-flow regression equations are found in 

tables 5, 6, and 10.

Table 4 lists low-flow characteristics determined by lowflow frequency analysis of non-exceedance probabilities for 

long-term, continuous-record streamgaging stations. Table 4 

also lists low-flow characteristics determined by regional 

regression equations, and weighted estimates of low-flow 

characteristics that combine the low-flow characteristics from 

low-flow frequency analysis, adjusted for zero flows, and 

regional regression equations. Table 10 lists preferred lowflow regional regression equations. These equations use basin 

drainage area as the chief explanatory variable. Candidate 

single- and multi-parameter regional regression equations, not 

listed in this report, were developed for each P-percent chance 

low flow for each of six regions. Equations with significant 

explanatory power, easily measured explanatory variables, 

ease of interpretation and use, and lower risks of explanatory 

variable inflation or collinearity were selected as final regional 

regression models. Table 5 lists equations for low-flow 

frequency characteristics at selected short-term, continuousrecord streamgaging stations computed using the MOVE.1 

method. Table 6 lists equations for low-flow frequency 

characteristics at selected partial-record, streamgaging stations 

computed using the MOVE.1 method. Table 11 lists low-flow 

characteristics for selected short-term, continuous record, 

streamgaging stations, transferred from continuous-record 

index stations using the MOVE.1 method. Table 12 lists 

low-flow characteristics for partial-record, streamgaging 

stations, transferred from continuous-record index stations 

using the MOVE.1 method. Table 3 lists daily flow-duration 

statistics and flow variability indices for selected streamgaging 

stations. Table 2 lists monthly streamflow statistics for selected 

continuous-record streamgaging stations.

Basin characteristics used in developing regional 

regression equations are summarized in tables 7 through 9. 

Table 7 lists statistics summarizing basin characteristics that 

were selected for regional regression of low flows in Virginia. 

Table 8 lists the names of selected basin characteristics along 

with their definitions and data sources. Table 9 displays basin 

characteristics chosen for testing in exploratory regional 

regression analyses.

Other Methods for Estimation at 

Ungaged Sites 

The appropriate method for calculating low-flow estimates at an ungaged site depends on whether (1) the drainage 

basin lies within a single low-flow region, (2) the drainage 

basin crosses low-flow region boundaries, or (3) the ungaged 

site is located on a gaged stream.

Low-flow estimates at sites on ungaged streams that lie 

entirely within a single low-flow region may be calculated 

using the equations listed in table 10 for the appropriate 

region.

Low-flow estimates at sites with drainage basins that 

cross low-flow regional boundaries may be made by first 

determining the percentage of the basin in each region. Lowflow estimates are then computed for the entire basin area 

by using the appropriate equation for each low-flow region, 

then multiplying the low flow for each part of the basin by the 

percentage of the entire basin in that region, and summing the 

contributions from each low-flow region.

Low-flow estimates at an ungaged site located on a gaged 

stream may be adjusted using a flow-routing equation developed by Hayes, consisting of the minimum consecutive-day 

(d-day) discharge of interest, multiplied by a simple drainagearea ratio raised to the 1.2 power. The equation takes the form:

1.2

for values of 0.25 and 4.0, j j

j i

i i

A A

dQT dQT A A

    =     ≥ ≤

   

where

dQTj = the average minimum d-consecutive day 

discharge having a T-year recurrence 

interval, in cubic feet per second;

j = the location at an ungaged site or confluence 

where the low-flow value is to be 

determined;

i = the location at a gaged site where low-flow 

values have previously been determined; 

and

A = drainage area, in square miles.

Any computed low-flow value that is calculated as 

negative is assumed to be zero. The equation is limited to 

drainage area ratios of no less than 0.25 and no more than 4.0 

(Hayes, 1991).

Example Applications

The following four exercises provide step-by-step 

examples of how to perform calculations and apply the methods suggested in this report to estimate low flows. Example 

calculations are shown for estimating low flow by (1) using 

(8)
Example Applications 21

the regression equations provided in this report, (2) using the 

drainage-area ratio method when a drainage basin spans two 

or more physiographic regions, (3) using a nearby gage for an 

ungaged site, and (4) using a gaged site.

Use of Regression Equations

Example 1. Estimating the 30-day averaged 1.1-year 

(0.9 P-percent chance) low flow at an ungaged site with 

a drainage basin completely contained within the Blue 

Ridge region.

Given: Drainage area (DA) of 7.3 mi2 for this basin, 

measured from a 1:24,000-scale topographic map.

Solution: The regression estimate for the site is computed using the appropriate Blue Ridge regional equation 

in table 10 for the 30-day averaged 1.1-year (0.9 percent 

chance) low flow as follows:

(1.1)

0.46 3

(1.1)

Log10(30Q ) 0.489 1.096 Log10(DA) (from table 10)

0.489 1.096 Log10(7.3)

0.489 1.096 0.86

0.46

30Q 10 2.87 ft /s

=− + •

=− + •

=− + •

=

= =

Drainage-Area Ratio Method

Example 2. Estimating the 7-day averaged 2-year 

(0.5 P-percent chance) low flow at an ungaged site with a 

drainage basin that spans the Coastal Plain and Piedmont 

regions.

Given: 

1. Drainage area (DA) of 53 mi2 for the entire basin, 

 measured from a 1:24,000-scale topographic 

 map.

2. Twenty-seven percent of the basin is located in the 

 Coastal Plain.

3. Seventy-three percent of the basin is located in the 

 Piedmont.

Solution: Calculate the 2-year (0.5 P-percent chance) 

low-flow discharge for the basin using the two regional 

equations, then use the fraction of the total drainage area 

in each region as a weighting factor to compute a final 

estimate, as follows:

(9)

For the Coastal Plain region:

(2)

0.39 3

(2)

Log10(7Q ) 1.106 0.868 Log10(DA) (from table 10)

1.106 0.868 Log10(53)

1.106 0.868 1.72

0.39

7Q 10 2.46 ft /s

=− + •

=− + •

=− + •

=

= =

For the Piedmont Region:

(2)

0.86 3

(2)

Log10(7Q ) 0.683 0.898 Log10(DA) (from table 10)

0.683 0.898 Log10(53)

0.683 0.898 1.72

0.86

7Q 10 7.27 ft /s

=− + •

=− + •

=− + •

=

= =

The combined estimate for the basin Q(7Q2):

(7Q2)r1 r1 (7Q2)r2 r2

3

(Q fraction ) (Q fraction ) (2.46 0.27)

 (7.27 0.73) 5.97 ft /s

• + • =•

+ •=

Ungaged Site with Nearby Gage

Example 3. Estimating the 4-day averaged 50-year 

(0.02 P-percent chance) low flow at an ungaged site on 

the New River, located upstream from the New River 

gage below Route 11 at Radford, Virginia, streamgaging 

station number 03171000.

Given:

1. Drainage area (Aj) of 1,141 mi2 for the basin 

 above the ungaged site, measured from a 

 1:24,000-scale topographic map.

2. Drainage area (Ai) of 2,767 mi2 for the basin 

 above the gaged site, measured from a 1:24,000-

 scale topographic map.

Solution: Using eq 8 and the measured discharge at 

streamgaging station number 03171000 from table 4,

the 4Q50 low flow at the ungaged site = 1.2 1,141 3 751 259 ft /s.

2,767

  =    

(10)

(11)

(12)
22 Low-Flow Characteristics of Virginia Streams

Gaged Site

Example 4. Estimating the 7-day averaged 100-year low 

flow at a gaged site on the North Fork of the Rivanna 

River at Route 606, near Earlysville, Virginia.

Given: Because this is a gaged site, the 7-day averaged 

100-year low flow may be read directly from table 4 

(Low-flow characteristics of streamgaging stations in 

Virginia, p. 27).

Solution: In table 4, find streamgaging station number 

02032640 in the left hand column of the 7-day averaged 

low-flow discharge section of the table, identifying the 

gage on the North Fork of the Rivanna River at Route 

606, near Earlysville, Virginia. Read across to find the 

low-flow discharge of 0.14 ft3/s corresponding to the 

P-percent chance low-flow probability of 0.01 (100-yr 

recurrence interval): 7Q(100) = 0.14 ft3/s.

Summary

This report provides P-percent chance estimates of 1-, 

4-, 7-, and 30-day averaged non-exceedance probabilities 

adjusted for instances of zero flow, and regional regression 

equations organized by physiographic region that may be 

used to estimate annual non-exceedance probability low flows 

using basin characteristics. Regression equations developed 

using the Maintenance of Variance with Extension (MOVE.1) 

method describe the line of organic correlation (LOC) with 

an appropriate index-site for low flows at 136 short-term, 

continuous-record streamgaging stations and 613 partialrecord, streamgaging stations. Monthly streamflow statistics 

computed on the individual daily mean streamflows of 

selected continuous-record streamgaging stations and statistics 

describing flow-duration are also presented. Regional regression equations estimate P-percent chance low flows using 

basin characteristics. Methods are explained. Text, figures, 

and lists are provided summarizing low-flow sites selected for 

study, delineated physiographic regions, statistics associated 

with low-flow basin characteristics, regional regression 

equations, weighted low-flow estimates, streamgaging station 

low-flow values, basin characteristic definitions, and basin 

characteristic datasources.

Regional regression analyses of low-flow response 

associated with explanatory basin characteristics provide 

insights into the nature of low flows across Virginia. Regional 

regression equations describing low flow as a function of basin 

drainage area and other explanatory basin characteristics are 

identified across the range of 1-, 4-, 7-, and 30-day average 

P-percent chance low flows within each region identified for 

study.

Candidate regional regression equations describing each 

1-, 4-, 7-, and 30-day average P-percent chance low flow as 

a function of basin drainage area in the Coastal Plain yielded 

median R-square of 0.58, 0.59, 0.65, and 0.65 and median root 

mean square error of 0.61, 0.63, 0.55, and 0.53, respectively.

Candidate regional regression equations describing each 

1-, 4-, 7-, and 30-day average P-percent chance low flow as a 

function of basin drainage area in the Piedmont, excluding the 

Mesozoic Basins located within the Piedmont physiographic 

region, yielded median R-square of 0.65, 0.66, 0.68, and 0.70, 

and median root mean square error of 0.67, 0.66, 0.65, and 

0.61, respectively.

Candidate regional regression equations describing each 

1-, 4-, 7-, and 30-day average P-percent chance low flow 

as a function of basin drainage area in the Mesozoic Basins 

yielded median R-square of 0.80, 0.81, 0.82, and 0.86, and 

median root mean square error of 0.48, 0.48, 0.47, and 0.40, 

respectively.

Candidate regional regression equations describing 

each 1-, 4-, 7-, and 30-day average P-percent chance low 

flow as a function of basin drainage area in the Blue Ridge 

yielded median R-square of 0.74, 0.79, 0.79, and 0.83, and 

median root mean square error of 0.53, 0.47, 0.48, and 0.41, 

respectively.

Candidate regional regression equations describing each 

1-, 4-, 7-, and 30-day average P-percent chance low flow 

as a function of basin drainage area in the Valley and Ridge 

yielded median R-square of 0.76, 0.78, 0.77, and 0.80, and 

median root mean square error of 0.40, 0.39, 0.39, and 0.36, 

respectively.

Candidate regional regression equations describing each 

1-, 4-, 7-, and 30-day average P-percent chance low flow as 

a function of basin drainage area in the Appalachian Plateaus 

yielded median R-square of 0.49, 0.59, 0.57, and 0.68, and 

median root mean square error of 0.45, 0.32, 0.33, and 0.25, 

respectively.

Estimates of magnitude, frequency, and duration of low 

flows provide insights into the dynamics and variability of 

water moving through Virginia’s unique stream systems. This 

information can be used in management decisionmaking while 

providing a basis for analysis of future streamflow response to 

changes in ecosystem and climate.

Acknowledgments

The authors extend their thanks to the Virginia 

Department of Environmental Quality, whose continued 

collaboration and assistance made this report possible. We also 

extend special thanks to the following individuals for their 

exceptional and energetic guidance, work, advice, review, 

and editing as information was compiled and this report was 

prepared: Donald C. Hayes, George E. Harlow, Jr., Theodore 

B. Samsel, and Robert B. Banks of the U.S. Geological 

Survey.
References 23

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of trend analysis for monthly water quality data: Water 

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References 25

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26 Low-Flow Characteristics of Virginia Streams

Glossary

[Unless otherwise noted, definitions are based on Langbein, W.B., and Iseri, K.T, 1995, Hydrologic definitions, available at USGS 

Web site http://water.usgs.gov/wsc/glossary.html]

Cubic feet per second (ft3/s) A measure of the rate of water discharge representing a volume of 1 cubic foot of water passing a 

given point in 1 second.

Discharge The volume of water that passes a given point within a given period of time.

Drainage area The area measured in a horizontal plane and enclosed by a topographic divide from which direct surface runoff 

from precipitation normally drains by gravity into a stream, upstream from a specified location.

Gage A water-level measuring device at a streamflow-gaging station.

Gage height The water-surface elevation referred to an arbitrary gage datum. Gage height is often used interchangeably with 

the more general term stage although gage height is more appropriate when used with a reading on a gage.

Hydrologic unit A geographic area representing part or all of a surface-water drainage basin or distinct hydrologic feature as 

delineated on a State Hydrologic Unit Map prepared by the U.S. Geological Survey.

Location A description of the placement of a streamflow-gaging station. Location may include the latitude, longitude, datum, 

county, and hydrologic unit code of the station.

Low-flow frequency curve A graph showing the magnitude and frequency of minimum flows for a period of given length. Frequency is usually expressed as the average interval, in years, between recurrences of an annual minimum flow equal to or less 

than that shown by the magnitude scale. 

Regulation The artificial manipulation of the flow of a stream.

Stage-discharge relation The relation between gage height and the rate at which water flows in a stream. It is defined by measurements of stage and discharge, by theoretical assumptions based on hydraulic properties of the stream channel or manmade 

flow-confining structures, or by a combination of both.

Streamgaging or streamflow-gaging station A particular site on a stream, canal, lake, or reservoir where systematic observations of water heights and water discharges are made.

Water year The 12-month period from October 1 through September 30. The date of the water year is designated by the calendar year in which the period ends and which includes 9 of the 12 months. A water year beginning October 1, 2005, and ending 

September 30, 2006, is called the “2006 water year.”
Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued

[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01484800 (p) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 8 0.220 0.150 0.100 0.070 0.050 0.030 0.010 0.000 0.000 0.000 0.000 0.000 0.000

01484800 (r) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 8 0.258 0.176 0.123 0.087 0.061 0.038 -- -- -- -- -- -- --01484800 (w) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 8 0.225 0.153 0.103 0.072 0.051 0.031 -- -- -- -- -- -- --01613900 (p) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 1.70 1.36 1.12 0.940 0.780 0.640 0.510 0.380 0.240 0.160 0.090 0.060 0.04001613900 (r) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 3.05 2.46 2.10 1.81 1.57 1.36 1.15 0.942 0.698 0.529 -- -- --01613900 (w) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 1.74 1.39 1.15 0.963 0.801 0.659 0.526 0.394 0.251 0.168 -- -- --01614830 (p) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 6.49 4.35 3.28 2.59 2.09 1.69 1.36 1.05 0.750 0.570 0.430 0.350 0.30001614830 (r) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 2.91 2.35 1.99 1.72 1.49 1.29 1.10 0.893 0.661 0.501 -- -- --01614830 (w) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 6.39 4.29 3.24 2.57 2.07 1.68 1.35 1.05 0.748 0.568 -- -- --01615000 (p) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 11.5 8.35 6.52 5.21 4.19 3.34 2.59 1.90 1.20 0.800 0.490 0.350 0.26001615000 (r) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 12.1 10.0 8.67 7.60 6.71 5.90 5.11 4.27 3.29 2.59 -- -- --01615000 (w) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 11.5 8.40 6.58 5.28 4.26 3.41 2.66 1.96 1.25 0.844 -- -- --01615500 (p) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 2.12 1.98 1.87 1.77 1.68 1.59 1.50 1.38 1.23 1.10 0.970 0.890 0.81001615500 (r) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 1.06 0.842 0.707 0.604 0.517 0.441 0.369 0.296 0.213 0.157 -- -- --01615500 (w) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 2.10 1.96 1.85 1.75 1.66 1.57 1.48 1.36 1.21 1.08 -- -- --01616000 (p) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 13.4 11.7 10.5 9.58 8.78 8.04 7.29 6.49 5.50 4.78 4.06 3.63 3.2701616000 (r) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 3.27 2.65 2.25 1.95 1.69 1.47 1.25 1.02 0.756 0.574 -- -- --01616000 (w) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 13.2 11.5 10.3 9.42 8.63 7.90 7.17 6.38 5.41 4.70 -- -- --01616100 (p) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 6.41 5.50 4.91 4.45 4.06 3.69 3.33 2.95 2.49 2.16 1.83 1.64 1.4801616100 (r) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 2.06 1.65 1.40 1.20 1.04 0.895 0.756 0.613 0.449 0.337 -- -- --01616100 (w) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 6.31 5.42 4.83 4.38 4.00 3.63 3.28 2.90 2.45 2.13 -- -- --01620500 (p) North River above Forest Road near Stokesville, Va. 17.3 59 0 2.04 1.38 1.04 0.820 0.650 0.520 0.410 0.310 0.210 0.150 0.100 0.080 0.06001620500 (r) North River above Forest Road near Stokesville, Va. 17.3 59 0 3.34 2.70 2.30 1.99 1.73 1.49 1.27 1.04 0.772 0.587 -- -- --01620500 (w) North River above Forest Road near Stokesville, Va. 17.3 59 0 2.08 1.42 1.08 0.853 0.680 0.547 0.433 0.329 0.224 0.161 -- -- --01621050 (p) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 4.20 2.41 1.67 1.25 0.970 0.760 0.600 0.470 0.340 0.270 0.210 0.190 0.17001621050 (r) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 2.72 2.20 1.87 1.61 1.40 1.20 1.02 0.832 0.615 0.465 -- -- --01621050 (w) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 4.15 2.40 1.68 1.26 0.983 0.774 0.613 0.481 0.348 0.275 -- -- --01622000 (p) North River along Route 693 near Burketown, Va. 376 75 0 97.3 79.3 68.9 61.3 55.1 49.7 44.7 39.6 33.7 29.7 25.9 23.8 22.001622000 (r) North River along Route 693 near Burketown, Va. 376 75 0 88.3 75.3 66.7 59.9 54.2 48.8 43.4 37.6 30.6 25.4 -- -- --01622000 (w) North River along Route 693 near Burketown, Va. 376 75 0 97.1 79.3 68.8 61.3 55.1 49.7 44.6 39.5 33.6 29.6 -- -- --01624000 (p) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 4 0.420 0.220 0.130 0.070 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01624000 (r) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 4 1.82 1.46 1.24 1.06 0.916 0.786 0.663 0.536 0.392 0.293 -- -- --

01624000 (w) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 4 0.461 0.256 0.162 0.098 0.026 0.022 0.018 0.014 0.010 0.007 -- -- --

01624300 (p) Middle River at Route 742 near Verona, Va. 179 18 0 60.5 51.7 46.4 42.4 39.0 36.0 33.1 30.1 26.5 23.9 21.4 20.0 18.701624300 (r) Middle River at Route 742 near Verona, Va. 179 18 0 40.1 33.8 29.6 26.3 23.6 21.0 18.5 15.8 12.6 10.2 -- -- --01624300 (w) Middle River at Route 742 near Verona, Va. 179 18 0 60.0 51.4 46.0 42.1 38.7 35.7 32.8 29.8 26.2 23.7 -- -- --01624800 (p) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 27.4 23.5 21.0 19.1 17.4 15.9 14.5 12.9 11.0 9.68 8.36 7.57 6.9201624800 (r) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 15.4 12.8 11.1 9.77 8.65 7.63 6.63 5.57 4.31 3.42 -- -- --01624800 (w) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 27.2 23.2 20.8 18.9 17.2 15.7 14.3 12.8 10.9 9.57 -- -- --01625000 (p) Middle River at Route 769 near Grottoes, Va. 373 78 0 114 101 91.8 83.9 76.6 69.6 62.3 54.3 44.1 36.5 29.0 24.6 21.001625000 (r) Middle River at Route 769 near Grottoes, Va. 373 78 0 87.6 74.6 66.1 59.3 53.7 48.3 43.0 37.3 30.3 25.2 -- -- --01625000 (w) Middle River at Route 769 near Grottoes, Va. 373 78 0 114 101 91.2 83.3 76.1 69.1 61.9 53.9 43.8 36.3 -- -- --01625900 (p) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 -- -- -- -- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00001625900 (r) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 12.0 8.92 7.02 5.64 4.49 3.52 2.63 1.83 1.02 -- -- -- --01625900 (w) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 -- -- -- -- -- -- -- -- -- -- -- -- --

Table 4. (1-day averaged, adjusted low flow) 27
28 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01626000 (p) South River at Route 664 near Waynesboro, Va. 127 54 0 44.1 38.9 35.6 33.1 30.9 28.8 26.8 24.7 22.1 20.2 18.3 17.1 16.1

01626000 (r) South River at Route 664 near Waynesboro, Va. 127 54 0 27.8 23.3 20.3 18.0 16.1 14.3 12.5 10.6 8.36 6.73 -- -- --01626000 (w) South River at Route 664 near Waynesboro, Va. 127 54 0 43.7 38.6 35.3 32.7 30.5 28.5 26.5 24.4 21.8 19.9 -- -- --01626500 (p) South River (at Basic City) at Lyndhurst Road at 

Waynesboro, Va. 

133 23 0 51.8 44.6 40.2 36.8 34.0 31.4 28.9 26.3 23.1 20.9 18.7 17.4 16.3

01626500 (r) South River (at Basic City) at Lyndhurst Road at 

Waynesboro, Va. 

133 23 0 29.2 24.5 21.4 19.0 16.9 15.0 13.2 11.2 8.83 7.12 -- -- --

01626500 (w) South River (at Basic City) at Lyndhurst Road at 

Waynesboro, Va. 

133 23 0 51.3 44.2 39.8 36.4 33.6 31.1 28.6 26.0 22.9 20.6 -- -- --

01626850 (p) South River at Hopeman Parkway near Dooms, Va. 148 22 0 72.7 64.6 59.9 56.6 54.0 51.8 49.8 47.8 45.7 44.4 43.3 42.7 42.301626850 (r) South River at Hopeman Parkway near Dooms, Va. 148 22 0 32.7 27.5 24.1 21.3 19.1 17.0 14.9 12.7 10.0 8.12 -- -- --01626850 (w) South River at Hopeman Parkway near Dooms, Va. 148 22 0 71.8 63.8 59.2 55.9 53.3 51.1 49.1 47.1 45.0 43.7 -- -- --01627500 (p) South River at Route 778 at Harriston, Va. 212 65 0 85.5 77.6 72.0 67.2 62.8 58.5 54.1 49.0 42.4 37.4 32.1 28.8 26.001627500 (r) South River at Route 778 at Harriston, Va. 212 65 0 48.0 40.5 35.6 31.8 28.5 25.5 22.5 19.3 15.4 12.6 -- -- --01627500 (w) South River at Route 778 at Harriston, Va. 212 65 0 84.7 76.8 71.2 66.5 62.1 57.9 53.4 48.5 41.9 36.9 -- -- --01628060 (p) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 11 0.030 0.020 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01628060 (r) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 11 0.413 0.281 0.205 0.152 0.112 0.079 0.053 0.031 0.013 -- -- -- --

01628060 (w) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 11 0.040 0.026 0.014 0.003 0.002 0.002 0.001 0.001 0.000 -- -- -- --

01628500 (p) South Fork Shenandoah River below Lower Lewis 

Run near Lynnwood, Va. 

1,079 75 0 350 299 267 242 222 203 184 165 142 125 109 99.3 91.3

01628500 (r) South Fork Shenandoah River below Lower Lewis 

Run near Lynnwood, Va. 

1,079 75 0 271 235 211 192 176 161 146 129 108 92.3 -- -- --

01628500 (w) South Fork Shenandoah River below Lower Lewis 

Run near Lynnwood, Va. 

1,079 75 0 349 298 266 241 221 202 184 164 141 125 -- -- --

01629500 (p) South Fork Shenandoah River at Route 211 near 

Luray, Va. 

1,372 44 0 474 402 357 323 295 270 245 220 190 169 148 136 126

01629500 (r) South Fork Shenandoah River at Route 211 near 

Luray, Va. 

1,372 44 0 350 305 275 251 231 211 192 170 144 124 -- -- --

01629500 (w) South Fork Shenandoah River at Route 211 near 

Luray, Va. 

1,372 44 0 472 399 355 322 294 269 244 219 189 168 -- -- --

01630700 (p) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 3.27 2.04 1.48 1.14 0.900 0.720 0.570 0.440 0.310 0.240 0.190 0.160 0.14001630700 (r) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 5.59 4.08 3.16 2.49 1.94 1.49 1.09 0.730 0.382 -- -- -- --01630700 (w) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 3.34 2.10 1.53 1.18 0.928 0.739 0.582 0.446 0.311 -- -- -- --01631000 (p) South Fork Shenandoah River below Route 619 at 

Front Royal, Va. 

1,634 76 0 494 419 373 338 309 282 256 230 197 175 153 140 129

01631000 (r) South Fork Shenandoah River below Route 619 at 

Front Royal, Va. 

1,634 76 0 422 369 333 304 280 257 234 209 177 153 -- -- --

01631000 (w) South Fork Shenandoah River below Route 619 at 

Front Royal, Va. 

1,634 76 0 492 418 372 337 308 281 256 229 197 174 -- -- --

01632000 (p) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 9.65 6.41 4.71 3.59 2.76 2.11 1.57 1.10 0.660 0.420 0.250 0.180 0.130

01632000 (r) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 47.5 40.1 35.3 31.4 28.2 25.2 22.3 19.1 15.2 12.5 -- -- --

01632000 (w) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 10.9 7.52 5.71 4.48 3.58 2.84 2.21 1.65 1.08 0.755 -- -- --
Table 4. (1-day averaged, adjusted low flow) 29

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01632082 (p) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 11.8 9.42 7.96 6.87 5.98 5.19 4.46 3.71 2.86 2.30 1.79 1.51 1.29

01632082 (r) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 9.38 7.72 6.65 5.82 5.12 4.49 3.87 3.22 2.46 1.93 -- -- --01632082 (w) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 11.8 9.38 7.93 6.85 5.96 5.17 4.45 3.70 2.85 2.29 -- -- --01632900 (p) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 25.6 20.7 17.6 15.3 13.4 11.7 10.1 8.47 6.58 5.31 4.15 3.50 2.9901632900 (r) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 20.1 16.7 14.6 12.9 11.4 10.1 8.81 7.44 5.80 4.63 -- -- --01632900 (w) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 25.5 20.6 17.5 15.3 13.4 11.7 10.1 8.45 6.56 5.30 -- -- --01633000 (p) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 74.2 62.4 53.3 45.6 38.5 31.9 25.4 18.8 11.6 7.29 4.02 2.59 1.67

01633000 (r) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 122 104 92.7 83.5 75.8 68.6 61.3 53.5 43.8 36.7 -- -- --

01633000 (w) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 75.5 63.5 54.4 46.5 39.5 32.8 26.3 19.6 12.3 7.95 -- -- --

01633500 (p) Stony Creek along Route 675 at Columbia Furnace, 

Va. 

77.5 8 0 10.1 8.73 7.94 7.37 6.92 6.53 6.17 5.81 5.41 5.15 4.92 4.79 4.70

01633500 (r) Stony Creek along Route 675 at Columbia Furnace, 

Va. 

77.5 8 0 16.5 13.7 11.9 10.4 9.25 8.16 7.10 5.97 4.63 3.68 -- -- --

01633500 (w) Stony Creek along Route 675 at Columbia Furnace, 

Va. 

77.5 8 0 10.2 8.83 8.02 7.43 6.97 6.56 6.19 5.81 5.40 5.12 -- -- --

01634000 (p) North Fork Shenandoah River at Route 55 near 

Strasburg, Va. 

770 81 0 153 129 113 102 92.1 83.3 74.8 66.0 55.5 48.1 40.9 36.7 33.3

01634000 (r) North Fork Shenandoah River at Route 55 near 

Strasburg, Va. 

770 81 0 189 163 146 132 121 110 98.8 86.8 72.0 61.1 -- -- --

01634000 (w) North Fork Shenandoah River at Route 55 near 

Strasburg, Va. 

770 81 0 154 129 114 102 92.7 83.9 75.3 66.4 55.8 48.3 -- -- --

01634500 (p) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 13.2 10.8 9.38 8.30 7.40 6.59 5.82 5.02 4.09 3.44 2.83 2.49 2.2001634500 (r) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 22.0 18.4 16.0 14.1 12.6 11.1 9.72 8.22 6.43 5.15 -- -- --01634500 (w) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 13.4 11.0 9.53 8.43 7.51 6.69 5.90 5.09 4.14 3.47 -- -- --01635090 (p) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 39.4 29.4 24.0 20.4 17.7 15.4 13.4 11.4 9.31 7.97 6.79 6.14 5.6301635090 (r) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 34.2 28.7 25.1 22.3 19.9 17.8 15.6 13.3 10.5 8.52 -- -- --01635090 (w) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 39.3 29.3 24.1 20.5 17.7 15.4 13.4 11.4 9.34 7.98 -- -- --01635500 (p) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 4.99 3.94 3.30 2.83 2.44 2.10 1.79 1.47 1.12 0.880 0.670 0.560 0.47001635500 (r) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 18.5 15.4 13.4 11.8 10.5 9.24 8.05 6.79 5.28 4.21 -- -- --01635500 (w) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 5.32 4.21 3.54 3.04 2.62 2.26 1.93 1.59 1.21 0.946 -- -- --01636210 (p) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 1.13 0.740 0.550 0.420 0.330 0.260 0.200 0.150 0.100 0.070 0.050 0.040 0.03001636210 (r) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 3.66 2.64 2.03 1.58 1.22 0.927 0.665 0.438 0.221 -- -- -- --01636210 (w) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 1.21 0.800 0.594 0.454 0.355 0.277 0.211 0.157 0.102 -- -- -- --01636266 (p) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 2.04 1.31 1.00 0.820 0.700 0.600 0.530 0.470 0.410 0.380 0.350 0.340 0.34001636266 (r) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 1.31 0.921 0.690 0.526 0.397 0.292 0.202 0.127 0.059 -- -- -- --01636266 (w) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 2.01 1.29 0.988 0.809 0.689 0.589 0.520 0.460 0.401 -- -- -- --01636316 (p) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01636316 (r) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01636316 (w) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01638350 (p) South Fork Catoctin Creek at Route 698 near Waterford, Va. 31.6 5 0 9.34 4.85 2.92 1.85 1.19 0.740 0.440 0.230 0.090 0.040 0.010 0.010 0.00001638350 (r) South Fork Catoctin Creek at Route 698 near Waterford, Va. 31.6 5 0 9.02 6.67 5.22 4.17 3.29 2.56 1.89 1.30 0.708 -- -- -- --01638350 (w) South Fork Catoctin Creek at Route 698 near Waterford, Va. 31.6 5 0 9.31 5.00 3.10 2.03 1.34 0.866 0.534 0.297 0.123 -- -- -- --
30 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01638420 (p) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 5.20 2.27 1.16 0.620 0.320 0.140 0.050 0.000 0.000 0.000 0.000 0.000 0.000

01638420 (r) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 6.38 4.67 3.63 2.87 2.25 1.73 1.27 0.856 0.452 -- -- -- --

01638420 (w) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 5.35 2.56 1.45 0.877 0.530 0.303 0.166 0.079 0.036 -- -- -- --

01638480 (p) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 15.1 10.1 7.23 5.28 3.84 2.72 1.83 1.10 0.510 0.250 0.100 0.060 0.03001638480 (r) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 28.6 21.8 17.5 14.3 11.7 9.37 7.23 5.24 3.13 -- -- -- --01638480 (w) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 15.8 10.6 7.67 5.67 4.16 2.97 2.02 1.24 0.585 -- -- -- --01643590 (p) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 2.77 1.92 1.51 1.24 1.05 0.900 0.770 0.650 0.530 0.450 0.390 0.360 0.33001643590 (r) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 1.94 1.38 1.04 0.800 0.609 0.453 0.318 0.203 0.097 -- -- -- --01643590 (w) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 2.75 1.91 1.50 1.23 1.04 0.891 0.761 0.642 0.523 -- -- -- --01643700 (p) Goose Creek at Route 611 near Middleburg, Va. 122 32 3 20.6 11.2 6.87 4.31 2.68 1.57 0.820 0.320 0.010 0.000 0.000 0.000 0.00001643700 (r) Goose Creek at Route 611 near Middleburg, Va. 122 32 3 40.2 31.0 25.1 20.7 17.0 13.8 10.8 7.94 4.88 -- -- -- --01643700 (w) Goose Creek at Route 611 near Middleburg, Va. 122 32 3 22.2 12.8 8.21 5.50 3.66 2.36 1.42 0.763 0.250 -- -- -- --01643805 (p) North Fork Goose Creek at Route 729 near Lincoln, 

Va. 

38.1 4 0 15.1 7.83 5.06 3.57 2.63 1.97 1.47 1.07 0.720 0.540 0.400 0.340 0.290

01643805 (r) North Fork Goose Creek at Route 729 near Lincoln, 

Va. 

38.1 4 0 11.1 8.25 6.49 5.20 4.13 3.23 2.41 1.67 0.925 -- -- -- --

01643805 (w) North Fork Goose Creek at Route 729 near Lincoln, 

Va. 

38.1 4 0 14.9 7.85 5.11 3.63 2.68 2.01 1.50 1.09 0.725 -- -- -- --

01643880 (p) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 9.23 2.14 0.760 0.310 0.130 0.050 0.020 0.000 0.000 0.000 0.000 0.000 0.00001643880 (r) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 14.1 10.5 8.32 6.71 5.36 4.22 3.17 2.23 1.26 -- -- -- --01643880 (w) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 11.1 5.26 3.47 2.58 1.92 1.42 1.000 0.675 0.336 -- -- -- --01644000 (p) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 40.6 24.2 16.4 11.7 8.43 6.04 4.19 2.70 1.44 0.840 0.450 0.290 0.20001644000 (r) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 122 96.7 80.3 68.1 57.3 48.1 39.0 30.3 20.4 -- -- -- --01644000 (w) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 44.4 27.3 19.0 14.0 10.3 7.55 5.35 3.59 1.96 -- -- -- --01644280 (p) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 10.1 7.03 5.46 4.41 3.62 2.98 2.43 1.92 1.39 1.07 0.800 0.670 0.56001644280 (r) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 10.1 7.07 5.33 4.12 3.16 2.34 -- -- -- -- -- -- --01644280 (w) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 10.1 7.03 5.45 4.40 3.60 2.95 -- -- -- -- -- -- --01644295 (p) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 10 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00001644295 (r) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 10 0.067 0.040 0.027 0.019 0.013 -- -- -- -- -- -- -- --01644295 (w) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 10 0.003 0.002 0.001 0.001 0.000 -- -- -- -- -- -- -- --01645784 (p) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 18.6 15.9 13.6 11.4 9.47 7.58 5.75 3.94 2.09 1.12 0.490 0.260 0.14001645784 (r) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 0.158 0.099 0.068 0.048 0.033 -- -- -- -- -- -- -- --01645784 (w) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 17.9 15.3 13.0 11.0 9.15 -- -- -- -- -- -- -- --01646000 (p) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 18.6 15.9 13.6 11.4 9.47 7.58 5.75 3.94 2.09 1.12 0.490 0.260 0.14001646000 (r) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 11.1 7.91 6.02 4.69 3.59 -- -- -- -- -- -- -- --01646000 (w) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 18.3 15.6 13.3 11.2 9.27 -- -- -- -- -- -- -- --01652500 (p) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 3.18 2.47 2.08 1.80 1.58 1.40 1.23 1.07 0.880 0.760 0.650 0.590 0.54001652500 (r) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 1.59 1.06 0.746 0.533 0.375 0.234 -- -- -- -- -- -- --01652500 (w) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 3.03 2.34 1.96 1.69 1.48 1.32 -- -- -- -- -- -- --01653000 (p) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 5.24 4.12 3.48 3.01 2.63 2.31 2.01 1.71 1.36 1.14 0.930 0.820 0.72001653000 (r) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 4.11 2.73 1.92 1.38 0.970 0.607 -- -- -- -- -- -- --01653000 (w) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 5.13 3.99 3.34 2.87 2.50 2.19 -- -- -- -- -- -- --01654000 (p) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 2 5.38 4.08 3.15 2.43 1.82 1.31 0.870 0.490 0.170 0.040 0.000 0.000 0.00001654000 (r) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 2 4.65 3.21 2.39 1.83 1.37 -- -- -- -- -- -- -- --01654000 (w) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 2 5.34 4.03 3.11 2.40 1.80 -- -- -- -- -- -- -- --
Table 4. (1-day averaged, adjusted low flow) 31

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01654500 (p) Long Branch (Little Run) at Route 620 near Annandale, Va. 3.72 8 2 1.17 1.00 0.890 0.800 0.730 0.650 0.540 0.000 0.000 0.000 0.000 0.000 0.00001654500 (r) Long Branch (Little Run) at Route 620 near Annandale, Va. 3.72 8 2 0.735 0.480 0.343 0.251 0.180 -- -- -- -- -- -- -- --01654500 (w) Long Branch (Little Run) at Route 620 near Annandale, Va. 3.72 8 2 1.16 0.986 0.875 0.786 0.717 -- -- -- -- -- -- -- --01655000 (p) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 8.14 5.63 4.27 3.34 2.65 2.08 1.60 1.17 0.740 0.500 0.320 0.230 0.180

01655000 (r) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 4.48 2.97 2.09 1.50 1.06 0.662 -- -- -- -- -- -- --

01655000 (w) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 7.69 5.31 4.02 3.14 2.49 1.95 -- -- -- -- -- -- --

01655500 (p) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 2 1.39 0.870 0.620 0.460 0.340 0.250 0.170 0.110 0.050 0.000 0.000 0.000 0.00001655500 (r) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 2 3.40 2.45 1.88 1.46 1.13 0.854 0.611 0.401 0.201 -- -- -- --01655500 (w) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 2 1.47 0.927 0.663 0.494 0.365 0.268 0.182 0.118 0.053 -- -- -- --01656000 (p) Cedar Run at Route 806 near Catlett, Va. 93.4 51 8 3.41 1.96 1.25 0.800 0.510 0.300 0.140 0.040 0.000 0.000 0.000 0.000 0.00001656000 (r) Cedar Run at Route 806 near Catlett, Va. 93.4 51 8 13.0 9.14 6.93 5.40 4.16 3.10 -- -- -- -- -- -- --01656000 (w) Cedar Run at Route 806 near Catlett, Va. 93.4 51 8 4.44 2.71 1.83 1.25 0.853 0.550 -- -- -- -- -- -- --01656100 (p) Cedar Run at Route 611 near Aden, Va. 155 15 0 7.30 4.38 3.04 2.23 1.67 1.26 0.930 0.650 0.400 0.270 0.180 0.130 0.10001656100 (r) Cedar Run at Route 611 near Aden, Va. 155 15 0 24.0 17.2 13.3 10.5 8.23 6.27 -- -- -- -- -- -- --01656100 (w) Cedar Run at Route 611 near Aden, Va. 155 15 0 8.43 5.22 3.69 2.74 2.05 1.54 -- -- -- -- -- -- --01656120 (p) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656120 (r) Cedar Run at Route 646 near Aden, Va. 175 2 0 27.8 20.1 15.5 12.3 9.69 7.41 -- -- -- -- -- -- --01656120 (w) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656500 (p) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 8.08 5.74 4.40 3.46 2.73 2.13 1.62 1.15 0.690 0.440 0.260 0.180 0.13001656500 (r) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 15.1 11.3 8.94 7.22 5.77 4.56 3.44 2.42 1.37 -- -- -- --01656500 (w) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 8.31 5.91 4.53 3.57 2.81 2.19 1.66 1.18 0.703 -- -- -- --01656650 (p) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 9.51 6.38 4.83 3.83 3.10 2.52 2.03 1.59 1.14 0.880 0.660 0.550 0.47001656650 (r) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 28.6 21.8 17.5 14.4 11.7 9.39 7.24 5.25 3.14 -- -- -- --01656650 (w) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 10.1 6.82 5.17 4.11 3.31 2.68 2.14 1.67 1.18 -- -- -- --01656700 (p) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 16.2 11.2 8.28 6.20 4.61 3.34 2.30 1.42 0.670 0.340 0.140 0.080 0.040

01656700 (r) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 63.0 46.6 36.8 29.8 24.0 18.9 -- -- -- -- -- -- --

01656700 (w) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 19.9 14.0 10.4 7.89 5.94 4.35 -- -- -- -- -- -- --

01656725 (p) Bull Run at Route 705 near Catharpin, Va. 25.7 16 5 1.20 0.500 0.250 0.130 0.060 0.020 0.000 0.000 0.000 0.000 0.000 0.000 0.00001656725 (r) Bull Run at Route 705 near Catharpin, Va. 25.7 16 5 2.72 1.81 1.32 0.990 0.732 0.518 -- -- -- -- -- -- --01656725 (w) Bull Run at Route 705 near Catharpin, Va. 25.7 16 5 1.43 0.691 0.401 0.247 0.148 0.082 -- -- -- -- -- -- --01656960 (p) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 5.31 3.46 2.45 1.79 1.30 0.930 0.630 0.390 0.190 0.100 0.040 0.030 0.01001656960 (r) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 6.05 4.15 3.08 2.36 1.78 1.29 -- -- -- -- -- -- --01656960 (w) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 5.37 3.52 2.50 1.83 1.33 0.955 -- -- -- -- -- -- --01657000 (p) Bull Run at Route 616 near Manassas, Va. 146 30 0 6.39 3.85 2.63 1.89 1.38 1.00 0.700 0.460 0.250 0.150 0.080 0.050 0.04001657000 (r) Bull Run at Route 616 near Manassas, Va. 146 30 0 22.4 16.0 12.3 9.70 7.59 5.77 -- -- -- -- -- -- --01657000 (w) Bull Run at Route 616 near Manassas, Va. 146 30 0 7.62 4.76 3.33 2.44 1.80 1.30 -- -- -- -- -- -- --01657020 (p) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01657020 (r) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 22.5 16.1 12.4 9.79 7.66 5.82 -- -- -- -- -- -- --01657020 (w) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --
32 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01657415 (p) Bull Run above Yates Ford near Clifton, Va. 185 11 0 16.9 13.9 12.2 10.9 9.85 8.92 8.04 7.15 6.11 5.40 4.72 4.33 4.01

01657415 (r) Bull Run above Yates Ford near Clifton, Va. 185 11 0 29.8 21.5 16.7 13.2 10.4 8.01 -- -- -- -- -- -- --01657415 (w) Bull Run above Yates Ford near Clifton, Va. 185 11 0 17.4 14.2 12.4 11.0 9.87 8.89 -- -- -- -- -- -- --01657500 (p) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 40.3 33.8 28.6 24.1 20.0 16.1 12.4 8.70 4.87 2.77 1.33 0.770 0.440

01657500 (r) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 117 88.1 70.7 58.1 47.5 38.1 -- -- -- -- -- -- --

01657500 (w) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 44.6 36.7 30.8 25.8 21.3 17.1 -- -- -- -- -- -- --

01657655 (p) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.280 0.150 0.090 0.060 0.040 0.030 0.020 0.010 0.010 0.010 0.000 0.000 0.00001657655 (r) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.517 0.350 0.245 0.174 0.122 0.076 -- -- -- -- -- -- --01657655 (w) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.323 0.185 0.116 0.078 0.052 0.036 -- -- -- -- -- -- --01658500 (p) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 16 0.430 0.250 0.160 0.110 0.070 0.050 0.010 0.000 0.000 0.000 0.000 0.000 0.00001658500 (r) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 16 1.50 0.999 0.726 0.540 0.394 -- -- -- -- -- -- -- --01658500 (w) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 16 0.479 0.283 0.184 0.127 0.082 -- -- -- -- -- -- -- --01658698 (p) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01658698 (r) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 0.409 0.263 0.185 0.134 0.094 -- -- -- -- -- -- -- --01658698 (w) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01658705 (p) Little Creek at Geiger Road at Quantico, Va. 3.28 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01658705 (r) Little Creek at Geiger Road at Quantico, Va. 3.28 2 0 0.649 0.422 0.301 0.220 0.157 -- -- -- -- -- -- -- --01658705 (w) Little Creek at Geiger Road at Quantico, Va. 3.28 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01659000 (p) North Branch Chopawamsic Creek above Marine 

Road 1 near Independent Hill, Va. 

5.69 8 2 0.310 0.220 0.160 0.110 0.070 0.040 0.010 0.000 0.000 0.000 0.000 0.000 0.000

01659000 (r) North Branch Chopawamsic Creek above Marine 

Road 1 near Independent Hill, Va. 

5.69 8 2 1.12 0.741 0.535 0.395 0.286 -- -- -- -- -- -- -- --

01659000 (w) North Branch Chopawamsic Creek above Marine 

Road 1 near Independent Hill, Va. 

5.69 8 2 0.352 0.246 0.178 0.123 0.079 -- -- -- -- -- -- -- --

01660000 (p) South Branch Chopawamsic Creek below Marine 

Road 1 near Garrisonville, Va. 

2.46 8 0 0.380 0.250 0.190 0.140 0.110 0.080 0.060 0.040 0.020 0.010 0.010 0.000 0.000

01660000 (r) South Branch Chopawamsic Creek below Marine 

Road 1 near Garrisonville, Va. 

2.46 8 0 0.488 0.315 0.223 0.161 0.115 -- -- -- -- -- -- -- --

01660000 (w) South Branch Chopawamsic Creek below Marine 

Road 1 near Garrisonville, Va. 

2.46 8 0 0.385 0.253 0.191 0.141 0.110 -- -- -- -- -- -- -- --

01660100 (p) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 2.51 1.15 0.610 0.330 0.170 0.080 0.020 0.000 0.000 0.000 0.000 0.000 0.00001660100 (r) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 2.72 1.81 1.28 0.913 0.644 0.402 -- -- -- -- -- -- --01660100 (w) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 2.59 1.39 0.843 0.527 0.324 0.175 -- -- -- -- -- -- --01660400 (p) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 4 4.35 2.24 1.31 0.790 0.470 0.260 0.130 0.040 0.000 0.000 0.000 0.000 0.00001660400 (r) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 4 6.78 4.74 3.56 2.74 2.08 -- -- -- -- -- -- -- --01660400 (w) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 4 4.61 2.50 1.53 0.976 0.615 -- -- -- -- -- -- -- --01660500 (p) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 1.52 0.810 0.500 0.320 0.210 0.140 0.090 0.050 0.020 0.010 0.000 0.000 0.000

01660500 (r) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 2.58 1.75 1.29 0.970 0.717 -- -- -- -- -- -- -- --

01660500 (w) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 1.62 0.891 0.565 0.371 0.248 -- -- -- -- -- -- -- --
Table 4. (1-day averaged, adjusted low flow) 33

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01661800 (p) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.74 1.23 0.920 0.690 0.510 0.360 0.240 0.140 0.050 0.000 0.000 0.000 0.000

01661800 (r) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 0.873 0.588 0.412 0.294 0.207 0.128 -- -- -- -- -- -- --01661800 (w) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.60 1.13 0.846 0.635 0.470 0.333 -- -- -- -- -- -- --01661900 (p) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 4.74 3.05 2.25 1.75 1.40 1.13 0.910 0.710 0.510 0.400 0.310 0.260 0.23001661900 (r) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 5.56 4.06 3.14 2.48 1.93 1.48 1.08 0.725 0.379 -- -- -- --01661900 (w) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 4.77 3.08 2.27 1.77 1.41 1.14 0.914 0.710 0.508 -- -- -- --01662000 (p) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 39.4 26.7 19.4 14.5 10.7 7.81 5.42 3.42 1.69 0.900 0.410 0.230 0.14001662000 (r) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 67.6 52.8 43.3 36.2 30.0 24.8 19.7 14.9 9.54 -- -- -- --01662000 (w) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 40.6 27.7 20.4 15.3 11.4 8.39 5.87 3.77 1.89 -- -- -- --01662500 (p) Rush River at old Route 522 at Washington, Va. 14.6 23 6 0.710 0.470 0.350 0.260 0.200 0.140 0.080 0.000 0.000 0.000 0.000 0.000 0.00001662500 (r) Rush River at old Route 522 at Washington, Va. 14.6 23 6 3.84 2.77 2.13 1.66 1.29 0.977 0.702 0.463 0.235 -- -- -- --01662500 (w) Rush River at old Route 522 at Washington, Va. 14.6 23 6 -- -- -- -- -- -- -- -- -- -- -- -- --01662800 (p) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 5.87 3.83 2.72 1.98 1.44 1.02 0.680 0.410 0.180 0.070 0.000 0.000 0.00001662800 (r) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 7.21 5.30 4.12 3.27 2.57 1.99 1.46 0.993 0.530 -- -- -- --01662800 (w) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 5.93 3.89 2.78 2.03 1.48 1.05 0.706 0.429 0.190 -- -- -- --01663000 (p) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 50.1 30.4 20.8 14.7 10.6 7.45 5.06 3.15 1.57 0.860 0.420 0.250 0.16001663000 (r) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 46.5 35.9 29.2 24.2 19.9 16.2 12.7 9.45 5.88 -- -- -- --01663000 (w) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 49.9 30.7 21.1 15.1 10.9 7.78 5.33 3.36 1.69 -- -- -- --01663500 (p) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 84.8 54.5 38.6 28.3 20.8 15.1 10.6 6.77 3.51 1.97 0.980 0.600 0.38001663500 (r) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 103 81.3 67.2 56.8 47.6 39.7 32.1 24.7 16.4 -- -- -- --01663500 (w) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 85.6 55.6 39.8 29.4 21.8 16.0 11.2 7.32 3.84 -- -- -- --01664000 (p) Rappahannock River at Route 29 (Alternate) at 

Remington, Va. 

619 64 0 148 96.6 69.8 52.4 39.8 29.9 21.9 15.0 8.66 5.40 3.11 2.12 1.48

01664000 (r) Rappahannock River at Route 29 (Alternate) at 

Remington, Va. 

619 64 0 243 196 166 143 122 105 86.9 69.7 49.7 -- -- -- --

01664000 (w) Rappahannock River at Route 29 (Alternate) at 

Remington, Va. 

619 64 0 152 100 73.0 55.4 42.3 32.1 23.6 16.4 9.56 -- -- -- --

01664500 (p) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 166 130 104 81.7 62.9 46.4 32.0 19.3 8.40 3.72 1.29 0.580 0.260

01664500 (r) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 252 204 172 149 127 109 90.9 73.0 52.2 -- -- -- --

01664500 (w) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 169 134 106 84.3 65.3 48.6 33.9 21.0 9.56 -- -- -- --

01665000 (p) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 3.75 3.17 2.71 2.31 1.94 1.59 1.25 0.910 0.540 0.320 0.170 0.100 0.06001665000 (r) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 4.28 3.10 2.38 1.87 1.45 1.10 0.796 0.528 0.270 -- -- -- --01665000 (w) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 -- -- -- -- -- -- -- -- -- -- -- -- --01665500 (p) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 35.9 26.8 21.0 16.7 13.3 10.4 7.79 5.41 3.10 1.86 0.990 0.630 0.41001665500 (r) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 37.7 29.0 23.4 19.3 15.8 12.8 9.98 7.33 4.48 -- -- -- --01665500 (w) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 36.0 26.8 21.1 16.8 13.4 10.4 7.84 5.46 3.13 -- -- -- --01666500 (p) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 70.9 52.2 40.8 32.6 26.0 20.4 15.5 11.0 6.59 4.15 2.36 1.58 1.07

01666500 (r) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 28.6 20.6 16.0 12.7 9.98 7.65 -- -- -- -- -- -- --

01666500 (w) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 69.5 51.2 40.1 32.0 25.5 20.1 -- -- -- -- -- -- --

01667000 (p) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 80.6 56.7 46.0 39.6 35.0 31.6 28.8 26.5 24.4 23.3 22.6 22.4 22.301667000 (r) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 86.4 64.6 51.5 42.0 34.0 27.1 -- -- -- -- -- -- --01667000 (w) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 80.7 56.9 46.2 39.6 35.0 31.5 -- -- -- -- -- -- --
34 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01667500 (p) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 151 117 93.7 75.1 59.4 45.7 33.5 22.3 11.6 6.26 2.85 1.60 0.900

01667500 (r) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 91.8 68.8 54.9 44.8 36.4 29.0 -- -- -- -- -- -- --01667500 (w) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 149 116 92.5 74.1 58.7 45.3 -- -- -- -- -- -- --01667870 (p) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01667870 (r) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 3.51 2.34 1.64 1.18 0.830 0.519 -- -- -- -- -- -- --01667870 (w) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01668000 (p) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 371 298 245 202 164 130 98.7 68.6 38.3 22.0 10.8 6.40 3.81

01668000 (r) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 166 107 75.6 54.8 39.1 24.9 -- -- -- -- -- -- --

01668000 (w) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 364 292 240 197 161 128 -- -- -- -- -- -- --

01668500 (p) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 4 7.11 4.33 2.92 2.03 1.41 0.950 0.590 0.310 0.080 0.000 0.000 0.000 0.00001668500 (r) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 4 5.46 3.62 2.54 1.83 1.29 0.808 -- -- -- -- -- -- --01668500 (w) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 4 6.81 4.21 2.86 2.00 1.39 0.931 -- -- -- -- -- -- --01668800 (p) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 6.14 4.45 3.45 2.74 2.18 1.71 1.30 0.920 0.550 0.350 0.200 0.140 0.09001668800 (r) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 1.92 1.29 0.903 0.646 0.455 0.284 -- -- -- -- -- -- --01668800 (w) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 5.61 4.07 3.16 2.51 2.00 1.58 -- -- -- -- -- -- --01669000 (p) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 2 8.94 6.48 4.92 3.76 2.84 2.08 1.43 0.860 0.340 0.090 0.000 0.000 0.000

01669000 (r) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 2 3.41 2.27 1.59 1.14 0.805 0.503 -- -- -- -- -- -- --

01669000 (w) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 2 8.12 5.88 4.47 3.42 2.59 1.91 -- -- -- -- -- -- --

01669500 (p) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 16.3 8.86 5.58 3.70 2.47 1.61 0.990 0.510 0.110 0.000 0.000 0.000 0.00001669500 (r) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 10.0 6.62 4.66 3.35 2.37 1.49 -- -- -- -- -- -- --01669500 (w) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 15.1 8.43 5.41 3.64 2.45 1.59 -- -- -- -- -- -- --01669520 (p) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 29.3 13.4 7.14 3.97 2.20 1.16 0.550 0.200 0.040 0.000 0.000 0.000 0.00001669520 (r) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 12.6 8.29 5.84 4.21 2.98 1.87 -- -- -- -- -- -- --01669520 (w) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 20.6 10.8 6.49 4.08 2.57 1.47 -- -- -- -- -- -- --01670000 (p) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 6 1.16 0.760 0.550 0.410 0.300 0.220 0.140 0.070 0.000 0.000 0.000 0.000 0.00001670000 (r) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 6 0.920 0.620 0.435 0.310 0.218 0.135 -- -- -- -- -- -- --01670000 (w) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 6 1.13 0.743 0.536 0.399 0.291 0.212 -- -- -- -- -- -- --01670180 (p) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670180 (r) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 8.10 5.69 4.30 3.33 2.53 -- -- -- -- -- -- -- --01670180 (w) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670300 (p) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 0.640 0.370 0.260 0.190 0.140 0.110 0.080 0.060 0.040 0.030 0.020 0.020 0.01001670300 (r) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 1.10 0.727 0.524 0.387 0.280 -- -- -- -- -- -- -- --01670300 (w) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 0.662 0.386 0.271 0.198 0.145 -- -- -- -- -- -- -- --01670400 (p) North Anna River at Route 601 near Partlow, Va. 342 16 0 44.7 43.3 42.4 41.7 41.0 40.4 39.8 39.2 38.3 37.7 37.0 36.6 36.301670400 (r) North Anna River at Route 601 near Partlow, Va. 342 16 0 64.9 48.6 38.5 31.2 25.0 -- -- -- -- -- -- -- --01670400 (w) North Anna River at Route 601 near Partlow, Va. 342 16 0 -- -- -- -- -- -- -- -- -- -- -- -- --01671000 (p) North Anna River near Doswell, Va. 440 56 0 81.3 65.0 53.2 43.5 35.2 27.7 20.8 14.2 7.72 4.32 2.05 1.18 0.69001671000 (r) North Anna River near Doswell, Va. 440 56 0 48.2 31.3 22.1 16.0 11.4 7.18 -- -- -- -- -- -- --01671000 (w) North Anna River near Doswell, Va. 440 56 0 77.1 60.8 49.5 40.4 32.6 25.7 -- -- -- -- -- -- --
Table 4. (1-day averaged, adjusted low flow) 35

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

01671020 (p) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 62.9 58.2 54.8 51.9 49.2 46.6 43.8 40.5 36.2 32.8 29.1 26.8 24.8

01671020 (r) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 87.4 66.0 52.7 43.1 34.7 -- -- -- -- -- -- -- --

01671020 (w) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01671100 (p) Little River at Route 685 near Doswell, Va. 107 43 0 13.4 8.34 5.72 4.04 2.87 1.99 1.32 0.790 0.360 0.180 0.080 0.040 0.02001671100 (r) Little River at Route 685 near Doswell, Va. 107 43 0 12.4 8.15 5.74 4.13 2.93 1.84 -- -- -- -- -- -- --01671100 (w) Little River at Route 685 near Doswell, Va. 107 43 0 13.2 8.30 5.72 4.06 2.88 1.97 -- -- -- -- -- -- --01671500 (p) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 12 0.570 0.380 0.280 0.210 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01671500 (r) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 12 0.857 0.562 0.403 0.296 0.213 -- -- -- -- -- -- -- --

01671500 (w) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 12 0.580 0.386 0.284 0.213 0.142 -- -- -- -- -- -- -- --

01672000 (p) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672000 (r) South Anna River at Route 617 at Vontay, Va. 297 2 0 56.4 42.0 33.2 26.9 21.4 -- -- -- -- -- -- -- --01672000 (w) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672500 (p) South Anna River at Route 54 near Ashland, Va. 395 68 0 68.3 51.7 41.4 33.8 27.5 22.2 17.4 12.8 8.05 5.32 3.22 2.25 1.6001672500 (r) South Anna River at Route 54 near Ashland, Va. 395 68 0 74.9 56.3 44.8 36.4 29.2 -- -- -- -- -- -- -- --01672500 (w) South Anna River at Route 54 near Ashland, Va. 395 68 0 68.6 51.9 41.5 33.8 27.6 -- -- -- -- -- -- -- --01673000 (p) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 181 144 120 102 86.5 73.1 60.5 47.9 34.0 25.1 17.4 13.5 10.601673000 (r) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 114 73.5 52.0 37.7 26.9 17.0 -- -- -- -- -- -- --01673000 (w) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 174 136 113 95.8 81.4 68.8 -- -- -- -- -- -- --01673500 (p) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 3 0.570 0.370 0.270 0.200 0.160 0.120 0.080 0.050 0.000 0.000 0.000 0.000 0.00001673500 (r) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 3 0.749 0.505 0.354 0.253 0.177 0.110 -- -- -- -- -- -- --01673500 (w) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 3 0.592 0.386 0.280 0.206 0.162 0.119 -- -- -- -- -- -- --01673550 (p) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 8.82 6.29 4.67 3.48 2.55 1.79 1.17 0.650 0.230 0.050 0.000 0.000 0.00001673550 (r) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 3.12 2.08 1.46 1.05 0.738 0.461 -- -- -- -- -- -- --01673550 (w) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 7.84 5.59 4.16 3.11 2.29 1.62 -- -- -- -- -- -- --01673638 (p) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 5.70 3.72 2.39 1.47 0.820 0.390 0.130 0.020 0.000 0.000 0.000 0.000 0.00001673638 (r) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 1.12 0.756 0.530 0.379 0.266 0.166 -- -- -- -- -- -- --01673638 (w) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 3.57 2.37 1.57 1.00 0.591 0.305 -- -- -- -- -- -- --01673800 (p) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 6.01 3.22 2.03 1.35 0.920 0.620 0.400 0.240 0.110 0.050 0.000 0.000 0.00001673800 (r) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 14.9 10.7 8.18 6.42 4.95 -- -- -- -- -- -- -- --01673800 (w) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 6.64 3.73 2.43 1.66 1.16 -- -- -- -- -- -- -- --01674000 (p) Mattaponi River above Route 605 near Bowling 

Green, Va. 

256 63 3 22.6 15.5 10.9 7.63 5.14 3.24 1.82 0.790 0.150 0.000 0.000 0.000 0.000

01674000 (r) Mattaponi River above Route 605 near Bowling 

Green, Va. 

256 63 3 28.7 18.7 13.2 9.52 6.76 4.26 -- -- -- -- -- -- --

01674000 (w) Mattaponi River above Route 605 near Bowling 

Green, Va. 

256 63 3 24.2 16.4 11.5 8.08 5.51 3.45 -- -- -- -- -- -- --

01674500 (p) Mattaponi River near Beulahville, Va. 602 62 0 103 81.7 65.6 52.4 41.0 30.9 22.0 13.8 6.51 3.13 1.21 0.590 0.29001674500 (r) Mattaponi River near Beulahville, Va. 602 62 0 65.2 42.2 29.8 21.6 15.4 9.72 -- -- -- -- -- -- --01674500 (w) Mattaponi River near Beulahville, Va. 602 62 0 97.6 76.1 60.7 48.3 37.8 28.6 -- -- -- -- -- -- --01677000 (p) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 2.21 1.41 1.00 0.740 0.550 0.400 0.280 0.170 0.060 0.000 0.000 0.000 0.00001677000 (r) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 0.814 0.549 0.385 0.274 0.193 0.120 -- -- -- -- -- -- --01677000 (w) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 2.01 1.29 0.919 0.682 0.508 0.371 -- -- -- -- -- -- --
36 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02011400 (p) Jackson River along Route 603 near Bacova, Va. 157 31 0 37.2 31.9 28.6 26.2 24.1 22.2 20.4 18.5 16.2 14.5 12.9 12.0 11.2

02011400 (r) Jackson River along Route 603 near Bacova, Va. 157 31 0 34.9 29.3 25.7 22.8 20.4 18.1 15.9 13.6 10.8 8.73 -- -- --02011400 (w) Jackson River along Route 603 near Bacova, Va. 157 31 0 37.1 31.8 28.6 26.1 24.0 22.1 20.3 18.4 16.1 14.4 -- -- --02011460 (p) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 7.59 5.88 4.89 4.18 3.61 3.11 2.65 2.20 1.70 1.37 1.07 0.910 0.79002011460 (r) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 12.7 10.5 9.11 7.99 7.06 6.21 5.38 4.51 3.47 2.74 -- -- --02011460 (w) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 -- -- -- -- -- -- -- -- -- -- -- -- --02011470 (p) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 13.6 13.6 13.5 13.2 12.7 11.9 10.9 9.26 6.68 4.58 2.61 1.64 0.99002011470 (r) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 16.0 13.3 11.5 10.2 9.00 7.93 6.90 5.80 4.50 3.57 -- -- --02011470 (w) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 -- -- -- -- -- -- -- -- -- -- -- -- --02011480 (p) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 11.0 7.66 6.01 4.92 4.12 3.47 2.92 2.40 1.86 1.54 1.25 1.11 0.99002011480 (r) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 19.0 15.8 13.7 12.1 10.7 9.50 8.27 6.98 5.43 4.33 -- -- --02011480 (w) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 11.2 7.86 6.20 5.10 4.28 3.62 3.05 2.51 1.94 1.60 -- -- --02011490 (p) Little Back Creek near Sunrise, Va. 4.9 21 0 2.89 2.63 2.45 2.29 2.15 2.01 1.87 1.71 1.49 1.33 1.16 1.05 0.96002011490 (r) Little Back Creek near Sunrise, Va. 4.9 21 0 0.872 0.690 0.578 0.492 0.421 0.358 0.299 0.239 0.171 0.125 -- -- --02011490 (w) Little Back Creek near Sunrise, Va. 4.9 21 0 2.85 2.59 2.41 2.25 2.11 1.98 1.84 1.68 1.47 1.31 -- -- --02011500 (p) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 21.5 17.2 14.5 12.4 10.5 8.92 7.39 5.84 4.11 3.00 2.05 1.57 1.2102011500 (r) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 29.5 24.7 21.6 19.1 17.1 15.2 13.3 11.3 8.91 7.19 -- -- --02011500 (w) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 21.7 17.4 14.7 12.5 10.7 9.07 7.53 5.96 4.21 3.09 -- -- --02011800 (p) Jackson River below Gathright Dam, near Hot 

Springs, Va. 

345 32 0 179 164 152 140 130 118 106 92.6 74.0 59.9 45.7 37.5 30.8

02011800 (r) Jackson River below Gathright Dam, near Hot 

Springs, Va. 

345 32 0 80.6 68.6 60.7 54.4 49.2 44.2 39.3 34.0 27.6 22.9 -- -- --

02011800 (w) Jackson River below Gathright Dam, near Hot 

Springs, Va. 

345 32 0 176 162 150 139 128 117 105 91.4 73.1 59.2 -- -- --

02011950 (p) Johnson Spring near Hot Springs, Va. -- 6 0 0.570 0.530 0.500 0.480 0.460 0.430 0.410 0.380 0.340 0.310 0.280 0.260 0.24002011950 (r) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02011950 (w) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02012000 (p) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 8.43 7.43 6.87 6.47 6.16 5.90 5.67 5.44 5.21 5.07 4.95 4.90 4.86

02012000 (r) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 2.10 1.69 1.43 1.23 1.06 0.914 0.772 0.626 0.459 0.345 -- -- --

02012000 (w) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 8.30 7.31 6.76 6.36 6.06 5.80 5.57 5.35 5.12 4.99 -- -- --

02012500 (p) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 108 95.5 87.9 82.2 77.5 73.3 69.3 65.2 60.3 56.9 53.7 51.8 50.302012500 (r) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 96.8 82.7 73.3 65.9 59.7 53.8 48.0 41.6 33.9 28.3 -- -- --02012500 (w) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 108 95.2 87.6 81.9 77.2 72.9 68.9 64.7 59.8 56.4 -- -- --02013000 (p) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 22.1 19.1 17.2 15.8 14.6 13.5 12.5 11.4 10.1 9.19 8.30 7.78 7.3502013000 (r) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 36.1 30.3 26.6 23.6 21.1 18.8 16.5 14.1 11.2 9.07 -- -- --02013000 (w) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 22.4 19.3 17.4 15.9 14.7 13.6 12.5 11.4 10.1 9.19 -- -- --02013100 (p) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 250 231 215 200 186 171 155 136 110 90.4 70.2 58.2 48.302013100 (r) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 148 127 114 103 93.4 84.6 75.9 66.4 54.7 46.1 -- -- --02013100 (w) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 247 228 213 198 184 169 153 134 109 89.6 -- -- --02014000 (p) Potts Creek at Route 18 near Covington, Va. 153 68 0 34.2 29.5 26.7 24.6 22.9 21.4 19.9 18.5 16.8 15.6 14.4 13.8 13.202014000 (r) Potts Creek at Route 18 near Covington, Va. 153 68 0 33.9 28.5 24.9 22.1 19.8 17.6 15.5 13.2 10.4 8.45 -- -- --02014000 (w) Potts Creek at Route 18 near Covington, Va. 153 68 0 34.2 29.4 26.6 24.5 22.8 21.3 19.8 18.4 16.6 15.4 -- -- --02014500 (p) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 3.29 2.65 2.31 2.07 1.88 1.72 1.58 1.44 1.29 1.19 1.11 1.06 1.0202014500 (r) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 2.32 1.87 1.58 1.36 1.18 1.02 0.859 0.698 0.513 0.386 -- -- --02014500 (w) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 3.27 2.63 2.29 2.06 1.87 1.71 1.57 1.43 1.28 1.18 -- -- --
Table 4. (1-day averaged, adjusted low flow) 37

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02015700 (p) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 42.4 37.3 34.3 32.2 30.5 28.9 27.5 26.1 24.5 23.4 22.5 21.9 21.5

02015700 (r) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 23.9 19.9 17.4 15.4 13.7 12.1 10.6 8.98 7.04 5.65 -- -- --02015700 (w) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 42.0 36.9 34.0 31.8 30.1 28.6 27.2 25.8 24.2 23.1 -- -- --02016000 (p) Cowpasture River below Route 633 near Clifton 

Forge, Va. 

461 81 0 102 89.7 82.0 76.3 71.4 67.0 62.7 58.3 52.9 49.1 45.3 43.1 41.2

02016000 (r) Cowpasture River below Route 633 near Clifton 

Forge, Va. 

461 81 0 110 93.9 83.4 75.0 68.0 61.4 54.9 47.7 39.0 32.6 -- -- --

02016000 (w) Cowpasture River below Route 633 near Clifton 

Forge, Va. 

461 81 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02016500 (p) James River below Route 220 at Lick Run, Va. 1,371 81 0 390 336 303 279 258 240 222 204 182 167 152 143 13502016500 (r) James River below Route 220 at Lick Run, Va. 1,371 81 0 350 305 275 250 230 211 192 170 143 124 -- -- --02016500 (w) James River below Route 220 at Lick Run, Va. 1,371 81 0 389 335 303 278 258 239 222 203 181 166 -- -- --02017000 (p) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 4.98 4.06 3.52 3.11 2.78 2.49 2.22 1.94 1.62 1.39 1.18 1.06 0.97002017000 (r) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 2.52 2.03 1.72 1.49 1.29 1.11 0.940 0.765 0.564 0.425 -- -- --02017000 (w) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 4.92 4.01 3.48 3.07 2.75 2.46 2.19 1.92 1.60 1.37 -- -- --02017500 (p) Johns Creek at Route 615 at New Castle, Va. 105 80 0 16.0 13.6 12.2 11.1 10.3 9.51 8.80 8.08 7.24 6.66 6.12 5.80 5.5402017500 (r) Johns Creek at Route 615 at New Castle, Va. 105 80 0 22.7 19.0 16.5 14.6 13.0 11.5 10.1 8.51 6.66 5.33 -- -- --02017500 (w) Johns Creek at Route 615 at New Castle, Va. 105 80 0 16.2 13.7 12.3 11.2 10.3 9.55 8.83 8.09 7.23 6.64 -- -- --02018000 (p) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 60.2 52.5 47.8 44.2 41.2 38.4 35.7 32.9 29.5 27.1 24.7 23.2 22.002018000 (r) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 76.6 65.2 57.7 51.6 46.6 41.9 37.3 32.2 26.1 21.6 -- -- --02018000 (w) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 60.5 52.8 48.0 44.4 41.3 38.5 35.8 32.9 29.4 27.0 -- -- --02018500 (p) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 5.82 4.98 4.35 3.80 3.29 2.81 2.33 1.81 1.22 0.840 0.520 0.370 0.26002018500 (r) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 6.91 5.66 4.86 4.24 3.72 3.24 2.79 2.31 1.75 1.36 -- -- --02018500 (w) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 5.85 5.00 4.36 3.81 3.30 2.82 2.34 1.82 1.23 0.851 -- -- --02019000 (p) Catawba Creek near Fincastle, Va. 104 8 0 21.1 17.0 14.4 12.4 10.7 9.20 7.77 6.32 4.67 3.58 2.61 2.10 1.7002019000 (r) Catawba Creek near Fincastle, Va. 104 8 0 22.5 18.8 16.4 14.4 12.9 11.4 9.94 8.41 6.58 5.27 -- -- --02019000 (w) Catawba Creek near Fincastle, Va. 104 8 0 21.1 17.0 14.4 12.4 10.8 9.25 7.82 6.37 4.71 3.61 -- -- --02019500 (p) James River at Route 11 at Buchanan, Va. 2,073 96 0 574 503 459 424 394 366 339 310 274 248 222 206 19302019500 (r) James River at Route 11 at Buchanan, Va. 2,073 96 0 543 477 432 396 366 337 308 276 235 205 -- -- --02019500 (w) James River at Route 11 at Buchanan, Va. 2,073 96 0 573 503 458 423 393 366 339 309 274 247 -- -- --02020500 (p) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 2 11.5 8.71 6.96 5.64 4.56 3.63 2.78 1.96 1.09 0.520 0.000 0.000 0.000

02020500 (r) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 2 31.1 26.1 22.8 20.2 18.1 16.1 14.1 12.0 9.47 7.65 -- -- --

02020500 (w) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 2 12.1 9.20 7.40 6.04 4.93 3.96 3.08 2.22 1.30 0.688 -- -- --

02021000 (p) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 16.7 14.6 13.3 12.3 11.4 10.6 9.84 8.98 7.93 7.15 6.38 5.91 5.5202021000 (r) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 41.8 35.2 30.9 27.5 24.6 22.0 19.4 16.6 13.2 10.7 -- -- --02021000 (w) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 17.2 15.1 13.7 12.6 11.7 10.9 10.0 9.13 8.03 7.21 -- -- --02021500 (p) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 39.3 32.8 28.7 25.5 22.8 20.3 17.9 15.5 12.5 10.4 8.47 7.34 6.4302021500 (r) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 76.6 65.2 57.7 51.6 46.6 41.9 37.3 32.2 26.1 21.6 -- -- --02021500 (w) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 40.1 33.5 29.3 26.0 23.3 20.8 18.3 15.8 12.8 10.6 -- -- --02022500 (p) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 9.36 8.29 7.58 7.02 6.52 6.06 5.59 5.08 4.44 3.96 3.48 3.19 2.9402022500 (r) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 7.08 5.80 4.98 4.35 3.81 3.33 2.86 2.37 1.80 1.39 -- -- --02022500 (w) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 9.31 8.24 7.53 6.96 6.46 6.00 5.54 5.03 4.39 3.91 -- -- --
38 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02023000 (p) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 95.2 81.7 73.3 67.0 61.6 56.7 51.9 47.0 41.0 36.7 32.5 30.0 27.9

02023000 (r) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 115 98.3 87.4 78.6 71.3 64.4 57.6 50.2 41.0 34.4 -- -- --

02023000 (w) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 95.7 82.1 73.6 67.2 61.8 56.8 52.0 47.0 41.0 36.6 -- -- --

02023500 (p) South River at Route 631 near Riverside, Va. 112 10 0 25.2 22.3 20.4 19.0 17.8 16.7 15.6 14.4 12.9 11.9 10.8 10.2 9.6302023500 (r) South River at Route 631 near Riverside, Va. 112 10 0 36.6 28.1 22.7 18.7 15.3 12.4 9.64 7.08 4.32 -- -- -- --02023500 (w) South River at Route 631 near Riverside, Va. 112 10 0 25.4 22.4 20.5 19.0 17.7 16.6 15.5 14.3 12.8 -- -- -- --02024000 (p) Maury River near Buena Vista, Va. 647 67 0 141 123 111 101 91.5 82.9 74.2 64.8 53.0 44.3 35.8 30.8 26.702024000 (r) Maury River near Buena Vista, Va. 647 67 0 157 135 121 109 99.4 90.1 80.9 70.9 58.5 49.4 -- -- --02024000 (w) Maury River near Buena Vista, Va. 647 67 0 141 123 111 101 91.7 83.1 74.4 64.9 53.1 44.4 -- -- --02024500 (p) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 213 176 156 143 132 123 115 108 99.8 94.8 90.6 88.5 87.002024500 (r) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 339 277 235 204 176 152 128 104 76.5 -- -- -- --02024500 (w) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 216 178 158 144 133 124 116 108 99.4 -- -- -- --02024915 (p) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 14.3 11.0 9.12 7.78 6.71 5.79 4.95 4.13 3.22 2.63 2.10 1.80 1.5702024915 (r) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 7.61 5.60 4.37 3.47 2.73 2.11 1.56 1.06 0.568 -- -- -- --02024915 (w) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 14.1 10.9 9.01 7.68 6.63 5.72 4.89 4.08 3.18 -- -- -- --02025000 (p) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 20.8 15.2 12.1 9.96 8.30 6.91 5.68 4.52 3.28 2.52 1.87 1.53 1.2702025000 (r) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 30.4 23.2 18.7 15.3 12.5 10.0 7.76 5.65 3.39 -- -- -- --02025000 (w) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 21.1 15.4 12.3 10.1 8.40 6.98 5.72 4.54 3.28 -- -- -- --02025500 (p) James River at Holcomb(s) Rock, Va. 3,256 79 0 863 737 658 596 543 494 447 397 336 293 250 225 20402025500 (r) James River at Holcomb(s) Rock, Va. 3,256 79 0 878 777 708 652 606 562 516 466 403 357 -- -- --02025500 (w) James River at Holcomb(s) Rock, Va. 3,256 79 0 863 738 659 597 544 496 449 398 338 294 -- -- --02026000 (p) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,028 875 778 701 635 575 516 453 376 322 268 237 21202026000 (r) James River above Route 60 at Bent Creek, Va. 3,649 81 0 991 878 802 739 689 639 589 533 462 410 -- -- --02026000 (w) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,027 876 778 702 637 576 517 454 378 323 -- -- --02026500 (p) Tye River at Roseland, Va. 69 9 0 32.6 24.7 19.6 15.8 12.6 9.93 7.52 5.27 3.05 1.84 0.990 0.630 0.41002026500 (r) Tye River at Roseland, Va. 69 9 0 21.4 16.2 12.9 10.5 8.50 6.78 5.17 3.70 2.16 -- -- -- --02026500 (w) Tye River at Roseland, Va. 69 9 0 32.2 24.4 19.4 15.6 12.5 9.85 7.46 5.23 3.03 -- -- -- --02027000 (p) Tye River at Route 158 near Lovingston, Va. 93 68 0 37.8 29.9 24.4 20.1 16.3 13.0 9.97 7.04 4.07 2.44 1.28 0.790 0.50002027000 (r) Tye River at Route 158 near Lovingston, Va. 93 68 0 29.8 22.8 18.3 15.0 12.2 9.83 7.59 5.52 3.31 -- -- -- --02027000 (w) Tye River at Route 158 near Lovingston, Va. 93 68 0 37.5 29.7 24.2 19.9 16.2 12.9 9.92 7.01 4.06 -- -- -- --02027500 (p) Piney River at Route 151 at Piney River, Va. 47.7 57 0 18.0 13.7 11.0 8.93 7.30 5.89 4.62 3.41 2.16 1.43 0.870 0.610 0.43002027500 (r) Piney River at Route 151 at Piney River, Va. 47.7 57 0 14.2 10.7 8.42 6.79 5.43 4.28 3.22 2.26 1.28 -- -- -- --02027500 (w) Piney River at Route 151 at Piney River, Va. 47.7 57 0 17.9 13.6 10.9 8.87 7.25 5.85 4.59 3.39 2.14 -- -- -- --02027800 (p) Buffalo River at Route 657 near Tye River, Va. 148 34 0 63.3 48.8 39.7 32.8 27.1 22.1 17.5 13.1 8.50 5.75 3.57 2.55 1.8402027800 (r) Buffalo River at Route 657 near Tye River, Va. 148 34 0 49.8 38.6 31.4 26.1 21.5 17.6 13.8 10.3 6.43 -- -- -- --02027800 (w) Buffalo River at Route 657 near Tye River, Va. 148 34 0 62.9 48.6 39.5 32.6 26.9 22.0 17.5 13.1 8.46 -- -- -- --02028000 (p) Tye (Buffalo) River near Norwood, Va. 355 19 0 145 111 91.6 77.9 67.1 57.8 49.4 41.1 31.9 26.0 20.7 17.8 15.502028000 (r) Tye (Buffalo) River near Norwood, Va. 355 19 0 131 104 86.8 73.7 62.2 52.3 42.5 33.1 22.5 -- -- -- --02028000 (w) Tye (Buffalo) River near Norwood, Va. 355 19 0 144 111 91.5 77.8 67.0 57.7 49.2 40.9 31.8 -- -- -- --02028500 (p) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 30.4 25.3 21.0 17.2 13.7 10.5 7.51 4.73 2.18 1.01 0.360 0.170 0.08002028500 (r) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 30.4 23.3 18.7 15.4 12.5 10.1 7.78 5.66 3.40 -- -- -- --02028500 (w) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 30.4 25.2 20.9 17.1 13.7 10.5 7.52 4.76 2.21 -- -- -- --02029000 (p) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,322 1,100 964 863 778 703 630 556 468 406 347 313 28502029000 (r) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,461 1,200 1,027 898 785 687 -- -- -- -- -- -- --02029000 (w) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,328 1,104 967 864 779 702 -- -- -- -- -- -- --
Table 4. (1-day averaged, adjusted low flow) 39

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02029500 (p) Hardware River at Route 618 near Scottsville, Va. 104 11 0 45.6 31.6 23.6 18.1 14.0 10.6 7.75 5.26 2.95 1.76 0.950 0.610 0.400

02029500 (r) Hardware River at Route 618 near Scottsville, Va. 104 11 0 33.7 25.8 20.8 17.1 14.0 11.3 8.77 6.41 3.88 -- -- -- --02029500 (w) Hardware River at Route 618 near Scottsville, Va. 104 11 0 45.2 31.4 23.5 18.1 14.0 10.6 7.78 5.29 2.97 -- -- -- --02030000 (p) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 1 39.2 35.5 31.5 27.3 22.9 18.4 13.8 9.04 4.11 1.62 0.180 0.000 0.000

02030000 (r) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 1 38.1 29.3 23.7 19.5 16.0 13.0 10.1 7.42 4.54 -- -- -- --

02030000 (w) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 1 39.2 35.3 31.2 27.0 22.7 18.3 13.7 9.00 4.12 -- -- -- --

02030500 (p) Slate River above Route 676 near Arvonia, Va. 226 67 0 68.2 53.4 43.6 35.9 29.5 23.8 18.5 13.4 8.14 5.15 2.90 1.92 1.2802030500 (r) Slate River above Route 676 near Arvonia, Va. 226 67 0 43.0 31.8 25.0 20.1 15.9 -- -- -- -- -- -- -- --02030500 (w) Slate River above Route 676 near Arvonia, Va. 226 67 0 67.2 52.6 43.0 35.4 29.0 -- -- -- -- -- -- -- --02031000 (p) Mechums River at Route 614 near White Hall (Ivy), 

Va. 

95.3 36 1 32.6 25.4 20.4 16.5 13.2 10.3 7.66 5.13 2.56 1.07 0.000 0.000 0.000

02031000 (r) Mechums River at Route 614 near White Hall (Ivy), 

Va. 

95.3 36 1 30.6 23.4 18.8 15.5 12.6 10.1 7.84 5.70 3.43 -- -- -- --

02031000 (w) Mechums River at Route 614 near White Hall (Ivy), 

Va. 

95.3 36 1 32.5 25.3 20.4 16.5 13.2 10.3 7.66 5.14 2.58 -- -- -- --

02031500 (p) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 3 0.620 0.480 0.370 0.290 0.210 0.130 0.050 0.000 0.000 0.000 0.000 0.000 0.000

02031500 (r) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 3 2.86 2.05 1.56 1.21 0.933 0.702 0.499 0.325 0.161 -- -- -- --

02031500 (w) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 3 0.687 0.524 0.402 0.314 0.228 0.143 0.060 0.007 0.003 -- -- -- --

02032250 (p) Moormans River at Route 601 near Free Union, Va. 77 18 0 9.99 6.80 5.04 3.84 2.93 2.21 1.61 1.09 0.610 0.370 0.200 0.130 0.08002032250 (r) Moormans River at Route 601 near Free Union, Va. 77 18 0 24.2 18.4 14.7 12.0 9.71 7.77 5.96 4.29 2.53 -- -- -- --02032250 (w) Moormans River at Route 601 near Free Union, Va. 77 18 0 10.5 7.21 5.36 4.11 3.14 2.37 1.73 1.17 0.652 -- -- -- --02032400 (p) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 6.60 4.37 3.25 2.53 2.00 1.58 1.23 0.920 0.620 0.450 0.310 0.240 0.190

02032400 (r) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 9.94 7.37 5.78 4.62 3.66 2.86 2.12 1.46 0.803 -- -- -- --

02032400 (w) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 6.71 4.46 3.32 2.59 2.04 1.61 1.25 0.932 0.623 -- -- -- --

02032500 (p) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 35.5 22.3 15.8 11.8 8.85 6.64 4.86 3.35 1.97 1.26 0.750 0.530 0.38002032500 (r) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 75.3 59.0 48.4 40.6 33.8 28.0 22.3 16.9 11.0 -- -- -- --02032500 (w) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 37.0 23.6 16.9 12.7 9.64 7.28 5.34 3.71 2.17 -- -- -- --02032515 (p) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 35.9 25.5 19.9 16.1 13.2 10.8 8.71 6.78 4.79 3.59 2.59 2.09 1.7102032515 (r) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 92.6 72.9 60.2 50.7 42.4 35.3 28.3 21.7 14.3 -- -- -- --02032515 (w) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 37.5 26.7 20.9 16.9 13.9 11.3 9.12 7.08 4.95 -- -- -- --
40 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02032640 (p) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 24.0 16.3 11.8 8.67 6.34 4.52 3.05 1.85 0.850 0.420 0.170 0.090 0.050

02032640 (r) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 35.2 27.0 21.8 17.9 14.6 11.8 9.20 6.74 4.10 -- -- -- --02032640 (w) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 24.5 16.7 12.2 9.06 6.68 4.80 3.27 2.02 0.943 -- -- -- --02032680 (p) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 56.9 43.2 34.6 28.2 23.0 18.5 14.4 10.6 6.59 4.31 2.57 1.77 1.24

02032680 (r) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 59.6 46.4 37.9 31.6 26.1 21.5 17.0 12.8 8.10 -- -- -- --

02032680 (w) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 57.0 43.3 34.7 28.3 23.1 18.6 14.5 10.6 6.62 -- -- -- --

02033500 (p) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 60.3 46.8 37.4 29.9 23.5 18.0 13.1 8.55 4.34 2.27 1.00 0.540 0.29002033500 (r) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 193 155 130 112 94.9 80.7 66.6 52.8 36.9 -- -- -- --02033500 (w) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 65.2 50.7 40.5 32.5 25.7 19.8 14.5 9.71 5.06 -- -- -- --02034000 (p) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 190 144 115 94.3 77.5 63.0 49.9 37.4 24.4 16.7 10.6 7.66 5.6402034000 (r) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 262 212 179 155 133 114 94.9 76.4 54.8 -- -- -- --02034000 (w) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 192 145 117 95.9 78.8 64.1 50.8 38.2 24.9 -- -- -- --02034500 (p) Willis River at Route 690 at Lakeside Village (Flanagan Mills), Va. 262 56 0 58.1 44.7 35.9 29.2 23.6 18.7 14.3 10.1 5.93 3.63 1.97 1.26 0.82002034500 (r) Willis River at Route 690 at Lakeside Village (Flanagan Mills), Va. 262 56 0 49.8 37.0 29.2 23.5 18.7 -- -- -- -- -- -- -- --02034500 (w) Willis River at Route 690 at Lakeside Village (Flanagan Mills), Va. 262 56 0 57.8 44.4 35.7 29.0 23.4 -- -- -- -- -- -- -- --02035000 (p) James River at Route 45 at Cartersville, Va. 6,252 108 0 1,841 1,535 1,340 1,191 1,064 948 836 720 581 484 392 340 29702035000 (r) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,131 1,772 1,531 1,352 1,192 1,057 -- -- -- -- -- -- --02035000 (w) James River at Route 45 at Cartersville, Va. 6,252 108 0 1,854 1,545 1,348 1,197 1,069 952 -- -- -- -- -- -- --02036500 (p) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 3.86 2.92 2.29 1.80 1.40 1.06 0.760 0.490 0.250 0.130 0.060 0.030 0.02002036500 (r) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 4.36 3.00 2.24 1.70 1.28 -- -- -- -- -- -- -- --02036500 (w) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 3.88 2.92 2.29 1.80 1.40 -- -- -- -- -- -- -- --02037500 (p) James River above Route 147 near Richmond, Va. 6,753 72 0 1,953 1,380 1,017 753 548 385 253 146 60.9 26.6 9.30 4.28 1.9902037500 (r) James River above Route 147 near Richmond, Va. 6,753 72 0 2,340 1,951 1,691 1,496 1,323 1,176 -- -- -- -- -- -- --02037500 (w) James River above Route 147 near Richmond, Va. 6,753 72 0 1,989 1,431 1,075 815 610 445 -- -- -- -- -- -- --02038000 (p) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 2.65 2.62 2.51 2.33 2.09 1.78 1.40 0.960 0.460 0.200 0.060 0.020 0.01002038000 (r) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 4.01 2.67 1.87 1.34 0.948 0.593 -- -- -- -- -- -- --02038000 (w) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 2.83 2.63 2.43 2.22 1.97 1.67 -- -- -- -- -- -- --02038500 (p) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 6.00 3.18 2.01 1.35 0.930 0.650 0.430 0.270 0.140 0.080 0.050 0.030 0.020

02038500 (r) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 6.34 4.20 2.95 2.12 1.50 0.939 -- -- -- -- -- -- --

02038500 (w) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 6.07 3.37 2.18 1.48 1.02 0.692 -- -- -- -- -- -- --
Table 4. (1-day averaged, adjusted low flow) 41

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02038850 (p) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 2.79 2.41 2.07 1.77 1.48 1.19 0.920 0.630 0.340 0.190 0.080 0.050 0.020

02038850 (r) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 1.68 1.12 0.817 0.609 0.446 -- -- -- -- -- -- -- --

02038850 (w) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 2.75 2.36 2.02 1.73 1.45 -- -- -- -- -- -- -- --

02039000 (p) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 22.0 21.2 19.8 18.2 16.1 13.8 11.1 7.99 4.35 2.27 0.900 0.430 0.20002039000 (r) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 13.4 9.56 7.31 5.72 4.40 -- -- -- -- -- -- -- --02039000 (w) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 21.7 20.8 19.4 17.7 15.8 -- -- -- -- -- -- -- --02039500 (p) Appomattox River at Route 45 at Farmville, Va. 302 79 0 65.7 65.4 64.8 62.6 58.6 52.3 43.3 31.1 15.5 6.80 1.95 0.680 0.22002039500 (r) Appomattox River at Route 45 at Farmville, Va. 302 79 0 57.4 42.8 33.8 27.4 21.8 -- -- -- -- -- -- -- --02039500 (w) Appomattox River at Route 45 at Farmville, Va. 302 79 0 65.4 64.5 63.6 61.4 57.3 -- -- -- -- -- -- -- --02040000 (p) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 174 146 125 107 90.8 75.4 60.3 44.8 27.9 17.7 9.87 6.40 4.1702040000 (r) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 137 105 84.4 69.7 56.7 -- -- -- -- -- -- -- --02040000 (w) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 172 145 124 106 89.8 -- -- -- -- -- -- -- --02041000 (p) Deep Creek above Route 153 near Mannboro, Va. 158 60 1 28.1 20.2 15.0 11.1 8.12 5.69 3.70 2.08 0.780 0.270 0.020 0.000 0.00002041000 (r) Deep Creek above Route 153 near Mannboro, Va. 158 60 1 30.2 22.1 17.2 13.7 10.8 -- -- -- -- -- -- -- --02041000 (w) Deep Creek above Route 153 near Mannboro, Va. 158 60 1 28.2 20.3 15.1 11.3 8.26 -- -- -- -- -- -- -- --02041500 (p) Appomattox River near Petersburg, Va. 1,333 36 0 295 231 191 161 136 114 94.1 74.0 52.0 38.1 26.3 20.3 15.902041500 (r) Appomattox River near Petersburg, Va. 1,333 36 0 250 195 159 133 110 -- -- -- -- -- -- -- --02041500 (w) Appomattox River near Petersburg, Va. 1,333 36 0 293 230 190 160 135 -- -- -- -- -- -- -- --02041650 (p) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 244 184 149 124 104 87.4 72.0 57.2 41.1 31.1 22.5 18.0 14.702041650 (r) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 252 196 160 134 111 -- -- -- -- -- -- -- --02041650 (w) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 244 184 150 125 105 -- -- -- -- -- -- -- --02042500 (p) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 37.5 25.9 18.8 13.7 9.85 6.83 4.43 2.52 1.03 0.440 0.150 0.070 0.030

02042500 (r) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 28.1 18.3 13.0 9.34 6.63 4.18 -- -- -- -- -- -- --

02042500 (w) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 35.7 24.5 17.7 12.9 9.32 6.44 -- -- -- -- -- -- --

02044000 (p) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 2 3.33 2.12 1.48 1.06 0.760 0.530 0.340 0.190 0.070 0.000 0.000 0.000 0.00002044000 (r) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 2 7.49 5.25 3.96 3.06 2.32 -- -- -- -- -- -- -- --02044000 (w) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 2 3.57 2.29 1.61 1.16 0.834 -- -- -- -- -- -- -- --02044500 (p) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 77.5 55.5 41.7 31.6 23.7 17.3 12.0 7.40 3.49 1.73 0.720 0.380 0.20002044500 (r) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 60.2 44.9 35.6 28.8 23.0 -- -- -- -- -- -- -- --02044500 (w) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 76.6 54.9 41.4 31.5 23.7 -- -- -- -- -- -- -- --02045500 (p) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 108 76.4 58.4 45.7 36.0 28.0 21.1 14.9 8.86 5.60 3.23 2.20 1.5202045500 (r) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 62.6 40.5 28.7 20.7 14.7 9.33 -- -- -- -- -- -- --02045500 (w) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 102 71.9 54.9 42.9 33.7 26.2 -- -- -- -- -- -- --02046000 (p) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 1 9.46 5.68 3.84 2.71 1.92 1.34 0.900 0.550 0.250 0.120 0.020 0.000 0.00002046000 (r) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 1 21.7 15.7 12.1 9.59 7.46 -- -- -- -- -- -- -- --02046000 (w) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 1 10.2 6.26 4.30 3.07 2.20 -- -- -- -- -- -- -- --02047000 (p) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 188 130 99.4 79.4 64.5 52.4 42.1 32.6 22.9 17.2 12.5 10.1 8.3302047000 (r) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 151 96.8 68.6 49.8 35.5 22.5 -- -- -- -- -- -- --02047000 (w) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 183 126 96.2 76.5 61.8 49.9 -- -- -- -- -- -- --02047500 (p) Blackwater River at Route 617 near Dendron, Va. 290 61 24 9.79 3.80 1.81 0.880 0.370 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.00002047500 (r) Blackwater River at Route 617 near Dendron, Va. 290 61 24 32.3 21.0 14.9 10.7 7.62 4.81 -- -- -- -- -- -- --02047500 (w) Blackwater River at Route 617 near Dendron, Va. 290 61 24 15.6 8.13 4.96 3.16 1.97 0.980 -- -- -- -- -- -- --
42 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 1-day averaged, adjusted low flow (ft3/s) 02048000 (p) Blackwater River at Route 460 at Zuni, Va. 451 45 4 19.1 9.78 5.67 3.39 2.00 1.11 0.550 0.190 0.010 0.000 0.000 0.000 0.000 02048000 (r) Blackwater River at Route 460 at Zuni, Va. 451 45 4 49.4 32.0 22.7 16.4 11.6 7.36 -- -- -- -- -- -- -- 02048000 (w) Blackwater River at Route 460 at Zuni, Va. 451 45 4 29.5 17.2 11.2 7.44 4.88 2.80 -- -- -- -- -- -- -- 02049500 (p) Blackwater River near Franklin, Va. 613 60 1 30.5 14.9 8.66 5.37 3.39 2.11 1.24 0.650 0.250 0.090 0.010 0.000 0.000 02049500 (r) Blackwater River near Franklin, Va. 613 60 1 66.3 42.9 30.4 22.0 15.6 9.89 -- -- -- -- -- -- -- 02049500 (w) Blackwater River near Franklin, Va. 613 60 1 40.8 22.7 14.5 9.65 6.40 3.83 -- -- -- -- -- -- -- 02050500 (p) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 1.39 0.910 0.680 0.540 0.450 0.370 0.310 0.250 0.200 0.160 0.140 0.120 0.110 02050500 (r) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 1.78 1.19 0.869 0.649 0.476 -- -- -- -- -- -- -- -- 02050500 (w) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 1.40 0.920 0.686 0.543 0.451 -- -- -- -- -- -- -- -- 02051000 (p) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 2 5.73 4.02 3.04 2.36 1.84 1.40 1.03 0.700 0.360 0.150 0.000 0.000 0.000 02051000 (r) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 2 10.8 7.65 5.82 4.53 3.47 -- -- -- -- -- -- -- -- 02051000 (w) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 2 5.95 4.17 3.15 2.44 1.90 -- -- -- -- -- -- -- -- 02051500 (p) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 102 80.2 65.4 53.9 44.3 35.7 27.8 20.2 12.3 7.83 4.44 2.95 1.98 02051500 (r) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 104 79.2 63.5 52.1 42.1 -- -- -- -- -- -- -- --

02051500 (w) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 102 80.2 65.4 53.9 44.2 -- -- -- -- -- -- -- --02051600 (p) Great Creek at Route 763 (old Route 618) near 

Cochran, Va. 

30.8 27 0 5.48 4.05 3.14 2.46 1.91 1.46 1.06 0.700 0.370 0.200 0.100 0.060 0.030

02051600 (r) Great Creek at Route 763 (old Route 618) near 

Cochran, Va. 

30.8 27 0 5.97 4.16 3.12 2.39 1.81 -- -- -- -- -- -- -- --

02051600 (w) Great Creek at Route 763 (old Route 618) near 

Cochran, Va. 

30.8 27 0 5.50 4.05 3.14 2.46 1.91 -- -- -- -- -- -- -- --

02052000 (p) Meherrin River at Route 301 at Emporia, Va. 744 56 0 102 69.4 52.7 41.6 33.4 26.8 21.2 16.1 11.0 8.00 5.61 4.42 3.5602052000 (r) Meherrin River at Route 301 at Emporia, Va. 744 56 0 79.9 51.6 36.5 26.4 18.8 11.9 -- -- -- -- -- -- --02052000 (w) Meherrin River at Route 301 at Emporia, Va. 744 56 0 99.1 67.3 50.9 40.0 32.0 25.5 -- -- -- -- -- -- --02052500 (p) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 13 2.85 1.75 1.14 0.730 0.430 0.190 0.000 0.000 0.000 0.000 0.000 0.000 0.000

02052500 (r) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 13 8.10 5.34 3.76 2.70 1.91 1.20 -- -- -- -- -- -- --

02052500 (w) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 13 3.70 2.31 1.53 1.01 0.629 0.310 -- -- -- -- -- -- --

02053000 (p) Fountains (Fontaine) Creek at Route 639 near Emporia, Va. 95.9 9 0 15.6 10.4 7.45 5.49 4.04 2.91 2.00 1.25 0.610 0.320 0.140 0.080 0.05002053000 (r) Fountains (Fontaine) Creek at Route 639 near Emporia, Va. 95.9 9 0 11.2 7.34 5.17 3.72 2.63 1.65 -- -- -- -- -- -- --02053000 (w) Fountains (Fontaine) Creek at Route 639 near Emporia, Va. 95.9 9 0 14.9 9.88 7.10 5.23 3.85 2.76 -- -- -- -- -- -- --02053800 (p) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 36.8 31.1 27.4 24.5 22.0 19.6 17.3 14.9 11.9 9.81 7.82 6.67 5.75

02053800 (r) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 35.5 27.3 22.0 18.1 14.8 12.0 9.31 6.82 4.15 -- -- -- --

02053800 (w) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 36.7 31.1 27.3 24.4 21.8 19.5 17.2 14.7 11.8 -- -- -- --

02054500 (p) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 64.6 55.5 49.4 44.6 40.4 36.4 32.5 28.3 23.2 19.5 15.8 13.7 12.002054500 (r) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 58.2 49.3 43.4 38.8 34.9 31.3 27.7 23.8 19.1 15.7 -- -- --02054500 (w) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 64.5 55.3 49.3 44.5 40.2 36.3 32.4 28.2 23.1 19.4 -- -- --02054530 (p) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 85.7 72.2 63.1 55.9 49.5 43.6 37.8 31.7 24.4 19.3 14.6 11.9 9.8702054530 (r) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 64.8 55.0 48.5 43.4 39.1 35.1 31.1 26.8 21.6 17.8 -- -- --02054530 (w) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 85.2 71.8 62.8 55.6 49.3 43.4 37.7 31.6 24.3 19.3 -- -- --
Table 4. (1-day averaged, adjusted low flow) 43

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02055000 (p) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 101 84.0 73.6 65.6 58.9 52.9 47.1 41.0 33.8 28.7 23.9 21.1 18.8

02055000 (r) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 90.3 77.0 68.3 61.3 55.4 49.9 44.5 38.6 31.4 26.1 -- -- --02055000 (w) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 100 83.8 73.4 65.5 58.9 52.8 47.0 40.9 33.7 28.7 -- -- --02055100 (p) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 4.23 3.42 2.90 2.51 2.18 1.88 1.59 1.30 0.970 0.750 0.560 0.450 0.37002055100 (r) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 2.20 1.77 1.50 1.29 1.12 0.960 0.811 0.658 0.484 0.363 -- -- --02055100 (w) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 4.18 3.38 2.87 2.48 2.16 1.86 1.57 1.29 0.960 0.742 -- -- --02056000 (p) Roanoke River below powerplant at Niagara, Va. 509 80 0 156 144 132 119 107 93.3 78.6 61.8 41.0 27.1 15.6 10.2 6.5902056000 (r) Roanoke River below powerplant at Niagara, Va. 509 80 0 122 104 92.9 83.7 76.0 68.7 61.5 53.6 43.9 36.8 -- -- --02056000 (w) Roanoke River below powerplant at Niagara, Va. 509 80 0 155 143 131 119 106 92.7 78.2 61.6 41.1 27.3 -- -- --02056650 (p) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 13.4 11.1 9.39 7.93 6.61 5.39 4.22 3.04 1.80 1.09 0.570 0.350 0.22002056650 (r) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 16.9 12.7 10.1 8.18 6.56 5.20 3.94 2.79 1.60 -- -- -- --02056650 (w) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 13.5 11.2 9.41 7.94 6.61 5.39 4.21 3.03 1.80 -- -- -- --02056900 (p) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 53.4 43.2 36.3 30.8 26.0 21.7 17.5 13.4 8.84 6.04 3.76 2.68 1.9202056900 (r) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 37.7 29.0 23.4 19.3 15.8 12.8 9.98 7.33 4.48 -- -- -- --02056900 (w) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 53.0 42.9 36.0 30.5 25.8 21.5 17.4 13.3 8.77 -- -- -- --02057000 (p) Blackwater River near Union Hall, Va. 208 37 0 109 88.6 75.7 65.7 57.2 49.4 42.0 34.4 25.6 19.8 14.5 11.7 9.4802057000 (r) Blackwater River near Union Hall, Va. 208 37 0 72.6 56.8 46.6 39.1 32.5 26.8 21.4 16.2 10.5 -- -- -- --02057000 (w) Blackwater River near Union Hall, Va. 208 37 0 108 87.8 75.0 65.1 56.6 49.0 41.6 34.1 25.4 -- -- -- --02057500 (p) Roanoke River near Toshes, Va. 1,017 36 0 363 309 273 244 218 195 171 146 115 93.3 72.7 61.1 51.702057500 (r) Roanoke River near Toshes, Va. 1,017 36 0 421 345 295 257 223 194 165 135 101 -- -- -- --02057500 (w) Roanoke River near Toshes, Va. 1,017 36 0 365 310 274 244 218 194 171 145 115 -- -- -- --02058000 (p) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 30.2 25.7 22.9 20.7 18.8 17.1 15.4 13.6 11.5 9.92 8.40 7.51 6.7702058000 (r) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 11.5 8.16 6.21 4.84 3.71 -- -- -- -- -- -- -- --02058000 (w) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 29.6 25.2 22.5 20.3 18.5 -- -- -- -- -- -- -- --02058400 (p) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 186 156 135 119 104 89.7 76.0 61.6 44.8 33.5 23.4 18.1 14.102058400 (r) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 130 103 85.6 72.7 61.3 51.5 41.9 32.6 22.1 -- -- -- --02058400 (w) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 185 155 134 118 103 89.0 75.4 61.1 44.4 -- -- -- --02058500 (p) Pigg River along Route 605 near Toshes, Va. 382 32 0 195 168 149 133 118 104 90.6 75.7 57.5 44.9 33.0 26.5 21.402058500 (r) Pigg River along Route 605 near Toshes, Va. 382 32 0 142 113 94.5 80.4 68.0 57.3 46.7 36.5 24.9 -- -- -- --02058500 (w) Pigg River along Route 605 near Toshes, Va. 382 32 0 194 167 147 131 117 104 89.8 75.0 57.1 -- -- -- --02059500 (p) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 69.2 59.5 52.4 46.4 40.9 35.6 30.3 24.6 17.8 13.2 9.03 6.87 5.2502059500 (r) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 64.9 50.7 41.5 34.6 28.7 23.7 18.8 14.2 9.05 -- -- -- --02059500 (w) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 69.1 59.3 52.1 46.1 40.6 35.4 30.1 24.4 17.7 -- -- -- --02060500 (p) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 798 595 474 387 317 258 205 154 102 70.4 45.6 33.6 25.2

02060500 (r) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 783 654 566 501 441 391 339 287 225 -- -- -- --

02060500 (w) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 797 597 477 390 320 261 207 157 104 -- -- -- --

02061000 (p) Big Otter River (Otter River) at Route 221 near 

Bedford, Va. 

114 16 0 37.4 27.3 21.8 18.0 15.1 12.6 10.4 8.37 6.18 4.82 3.65 3.03 2.56

02061000 (r) Big Otter River (Otter River) at Route 221 near 

Bedford, Va. 

114 16 0 37.3 28.7 23.2 19.1 15.6 12.7 9.87 7.25 4.43 -- -- -- --

02061000 (w) Big Otter River (Otter River) at Route 221 near 

Bedford, Va. 

114 16 0 37.4 27.3 21.8 18.0 15.1 12.6 10.4 8.35 6.15 -- -- -- --
44 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 1-day averaged, adjusted low flow (ft3/s) 02061500 (p) Big Otter River (Otter River) at Route 682 near Evington, Va. 315 69 0 107 98.9 89.9 80.0 69.4 58.1 45.9 32.7 17.8 9.51 4.01 2.04 1.02 02061500 (r) Big Otter River (Otter River) at Route 682 near Evington, Va. 315 69 0 115 91.1 75.5 64.0 53.8 45.0 36.5 28.2 18.9 -- -- -- -- 02061500 (w) Big Otter River (Otter River) at Route 682 near Evington, Va. 315 69 0 107 98.7 89.5 79.6 69.0 57.8 45.7 32.6 17.8 -- -- -- -- 02062500 (p) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 975 767 643 552 478 413 353 292 224 179 139 117 99.6 02062500 (r) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,091 919 801 715 635 568 498 428 345 -- -- -- -- 02062500 (w) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 978 771 647 556 481 416 355 295 226 -- -- -- -- 02064000 (p) Falling River at Route 643 near Naruna, Va. 165 69 0 54.5 48.2 42.6 37.5 32.5 27.5 22.3 16.9 10.5 6.63 3.61 2.28 1.43 02064000 (r) Falling River at Route 643 near Naruna, Va. 165 69 0 31.5 23.1 18.0 14.4 11.3 -- -- -- -- -- -- -- --

02064000 (w) Falling River at Route 643 near Naruna, Va. 165 69 0 53.7 47.3 41.8 36.8 31.9 -- -- -- -- -- -- -- --02065200 (p) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 517 424 368 327 292 262 233 203 169 145 123 110 99.3

02065200 (r) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,231 1,040 910 815 725 651 573 496 404 -- -- -- --

02065200 (w) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 535 438 380 337 301 269 239 208 172 -- -- -- --

02065500 (p) Cub Creek at Route 40 at Phenix, Va. 97.6 59 1 39.7 32.6 27.8 24.0 20.6 17.5 14.5 11.4 7.74 5.16 2.03 0.000 0.00002065500 (r) Cub Creek at Route 40 at Phenix, Va. 97.6 59 1 18.7 13.5 10.4 8.20 6.36 -- -- -- -- -- -- -- --02065500 (w) Cub Creek at Route 40 at Phenix, Va. 97.6 59 1 39.0 32.0 27.3 23.5 20.2 -- -- -- -- -- -- -- --02066000 (p) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,142 918 780 676 591 514 442 369 285 228 177 149 126

02066000 (r) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 862 696 588 507 437 376 -- -- -- -- -- -- --

02066000 (w) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,129 908 772 670 585 509 -- -- -- -- -- -- --

02066500 (p) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 30.2 19.9 14.1 10.2 7.33 5.13 3.40 2.01 0.900 0.430 0.170 0.090 0.05002066500 (r) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 25.8 18.8 14.6 11.6 9.06 -- -- -- -- -- -- -- --02066500 (w) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 29.9 19.8 14.1 10.3 7.42 -- -- -- -- -- -- -- --02067000 (p) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,400 1,199 1,057 939 833 733 632 524 394 304 221 175 140

02067000 (r) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 955 774 655 567 490 422 -- -- -- -- -- -- --

02067000 (w) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,380 1,181 1,040 924 820 721 -- -- -- -- -- -- --

02069700 (p) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 70.9 61.5 54.8 49.2 44.1 39.2 34.3 28.9 22.3 17.7 13.2 10.7 8.7802069700 (r) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 16.4 11.8 9.06 7.12 5.51 -- -- -- -- -- -- -- --02069700 (w) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 69.3 60.1 53.5 48.1 43.1 -- -- -- -- -- -- -- --02070000 (p) North Mayo River below Route 629 near Spencer, Va. 108 77 0 70.8 61.6 54.9 49.2 44.0 38.9 33.7 28.1 21.2 16.4 11.9 9.40 7.4802070000 (r) North Mayo River below Route 629 near Spencer, Va. 108 77 0 20.7 15.0 11.6 9.13 7.10 -- -- -- -- -- -- -- --02070000 (w) North Mayo River below Route 629 near Spencer, Va. 108 77 0 69.3 60.3 53.7 48.1 43.0 -- -- -- -- -- -- -- --
Table 4. (1-day averaged, adjusted low flow) 45

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02071530 (p) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 22.8 16.8 13.6 11.5 9.96 8.66 7.52 6.44 5.28 4.56 3.92 3.57 3.30

02071530 (r) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 7.36 5.41 4.22 3.35 2.63 2.04 1.50 1.02 0.545 -- -- -- --

02071530 (w) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 22.4 16.5 13.4 11.4 9.80 8.53 7.41 6.34 5.21 -- -- -- --

02072000 (p) Smith River below Philpott Dam near Philpott, Va. 215 59 0 70.3 54.9 47.4 42.6 39.2 36.5 34.3 32.4 30.6 29.8 29.2 29.1 29.002072000 (r) Smith River below Philpott Dam near Philpott, Va. 215 59 0 75.3 59.0 48.4 40.6 33.8 28.0 22.3 16.9 11.0 -- -- -- --02072000 (w) Smith River below Philpott Dam near Philpott, Va. 215 59 0 70.4 55.0 47.4 42.6 39.1 36.3 34.1 32.1 30.3 -- -- -- --02072500 (p) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 106 84.9 74.4 67.6 62.6 58.6 55.3 52.4 49.7 48.2 47.3 47.0 46.902072500 (r) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 92.6 72.9 60.2 50.7 42.4 35.3 28.3 21.7 14.3 -- -- -- --02072500 (w) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 106 84.7 74.1 67.3 62.2 58.2 54.9 51.9 49.2 -- -- -- --02073000 (p) Smith River below Route 58 at Martinsville, Va. 379 76 0 145 114 94.8 81.0 69.9 60.2 51.1 42.2 32.2 25.6 19.7 16.5 14.002073000 (r) Smith River below Route 58 at Martinsville, Va. 379 76 0 141 112 93.6 79.7 67.3 56.7 46.3 36.2 24.7 -- -- -- --02073000 (w) Smith River below Route 58 at Martinsville, Va. 379 76 0 145 114 94.8 81.0 69.8 60.1 51.0 42.1 32.0 -- -- -- --02073500 (p) Leatherwood Creek at Route 650 near Martinsville 

(Old Liberty), Va. 

68.4 8 0 16.0 11.4 8.77 6.93 5.51 4.33 3.31 2.38 1.47 0.960 0.580 0.410 0.290

02073500 (r) Leatherwood Creek at Route 650 near Martinsville 

(Old Liberty), Va. 

68.4 8 0 13.2 9.39 7.17 5.61 4.32 -- -- -- -- -- -- -- --

02073500 (w) Leatherwood Creek at Route 650 near Martinsville 

(Old Liberty), Va. 

68.4 8 0 15.9 11.3 8.71 6.88 5.47 -- -- -- -- -- -- -- --

02074500 (p) Sandy River above Route 863 near Danville, Va. 111 76 0 49.5 40.9 35.3 31.0 27.2 23.8 20.5 17.0 13.0 10.3 7.73 6.34 5.2602074500 (r) Sandy River above Route 863 near Danville, Va. 111 76 0 21.3 15.4 11.9 9.41 7.32 -- -- -- -- -- -- -- --02074500 (w) Sandy River above Route 863 near Danville, Va. 111 76 0 48.6 40.1 34.6 30.4 26.7 -- -- -- -- -- -- -- --02075000 (p) Dan River at railroad bridge at Danville, Va. 2,060 60 0 822 721 649 588 533 479 424 363 287 232 179 149 12402075000 (r) Dan River at railroad bridge at Danville, Va. 2,060 60 0 385 304 251 212 177 -- -- -- -- -- -- -- --02075000 (w) Dan River at railroad bridge at Danville, Va. 2,060 60 0 808 709 638 578 524 -- -- -- -- -- -- -- --02075045 (p) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 918 718 595 504 429 362 301 240 172 129 92.1 72.7 58.202075045 (r) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 395 312 258 218 182 -- -- -- -- -- -- -- --02075045 (w) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 900 705 585 496 422 -- -- -- -- -- -- -- --02075500 (p) Dan River at Route 658 at Paces, Va. 2,587 56 0 991 831 727 646 576 511 448 382 303 248 196 166 14202075500 (r) Dan River at Route 658 at Paces, Va. 2,587 56 0 482 383 318 271 227 -- -- -- -- -- -- -- --02075500 (w) Dan River at Route 658 at Paces, Va. 2,587 56 0 975 818 716 636 567 -- -- -- -- -- -- -- --02076500 (p) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 5.22 4.44 3.90 3.47 3.09 2.73 2.37 1.99 1.53 1.21 0.910 0.750 0.61002076500 (r) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 1.80 1.21 0.881 0.658 0.482 -- -- -- -- -- -- -- --02076500 (w) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 5.11 4.34 3.81 3.39 3.02 -- -- -- -- -- -- -- --02077000 (p) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 132 99.2 80.2 66.4 55.4 45.9 37.4 29.1 20.3 14.9 10.3 8.02 6.3302077000 (r) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 103 78.4 62.9 51.6 41.7 -- -- -- -- -- -- -- --02077000 (w) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 131 98.5 79.6 66.0 55.0 -- -- -- -- -- -- -- --02077500 (p) Hyco River at Route 501 near Denniston, Va. 288 59 0 27.3 22.6 18.7 15.2 12.1 9.24 6.60 4.15 1.91 0.880 0.320 0.150 0.07002077500 (r) Hyco River at Route 501 near Denniston, Va. 288 59 0 54.7 40.7 32.2 26.0 20.7 -- -- -- -- -- -- -- --02077500 (w) Hyco River at Route 501 near Denniston, Va. 288 59 0 28.6 23.4 19.3 15.7 12.5 -- -- -- -- -- -- -- --02078000 (p) Hyco River at Route 738 near Omega, Va. 412 15 0 33.5 21.6 15.7 12.0 9.26 7.17 5.44 3.94 2.51 1.73 1.14 0.860 0.66002078000 (r) Hyco River at Route 738 near Omega, Va. 412 15 0 78.0 58.7 46.8 38.1 30.6 -- -- -- -- -- -- -- --02078000 (w) Hyco River at Route 738 near Omega, Va. 412 15 0 35.5 23.1 16.9 12.9 10.0 -- -- -- -- -- -- -- --02079000 (p) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 3,122 2,640 2,347 2,127 1,943 1,779 1,622 1,459 1,265 1,128 996 919 85502079000 (r) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 1,365 1,120 953 830 714 -- -- -- -- -- -- -- --02079000 (w) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 3,070 2,597 2,309 2,094 1,914 -- -- -- -- -- -- -- --
46 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

02079640 (p) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 5.08 2.92 1.90 1.28 0.870 0.560 0.340 0.160 0.000 0.000 0.000 0.000 0.000

02079640 (r) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 10.3 7.31 5.55 4.32 3.30 -- -- -- -- -- -- -- --02079640 (w) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 5.42 3.19 2.12 1.45 1.00 -- -- -- -- -- -- -- --03164000 (p) New River at Route 94 near Galax, Va. 1,141 76 0 852 741 669 611 561 514 468 418 356 310 265 238 21503164000 (r) New River at Route 94 near Galax, Va. 1,141 76 0 478 394 337 295 257 224 191 158 119 -- -- -- --03164000 (w) New River at Route 94 near Galax, Va. 1,141 76 0 843 734 662 605 555 509 463 413 352 -- -- -- --03164500 (p) New River at railroad bridge near Grayson, Va. 1,174 3 0 561 503 465 436 411 387 364 339 307 284 260 246 23303164500 (r) New River at railroad bridge near Grayson, Va. 1,174 3 0 493 407 348 305 266 232 198 164 124 -- -- -- --03164500 (w) New River at railroad bridge near Grayson, Va. 1,174 3 0 559 501 463 434 408 384 361 336 305 -- -- -- --03165000 (p) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 36.7 31.7 28.4 26.0 23.8 21.8 19.9 17.8 15.3 13.5 11.7 10.6 9.6903165000 (r) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 11.5 8.57 6.74 5.41 4.30 3.37 2.52 1.75 0.970 -- -- -- --03165000 (w) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 36.1 31.1 28.0 25.5 23.4 21.5 19.6 17.6 15.1 -- -- -- --03165500 (p) New River at Ivanhoe, Va. 1,350 59 0 801 668 585 523 470 422 376 328 271 231 193 171 15303165500 (r) New River at Ivanhoe, Va. 1,350 59 0 576 477 410 360 315 276 237 198 151 -- -- -- --03165500 (w) New River at Ivanhoe, Va. 1,350 59 0 796 664 582 519 467 419 373 326 269 -- -- -- --03166800 (p) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.130 0.100 0.080 0.070 0.060 0.050 0.040 0.030 0.020 0.020 0.010 0.010 0.01003166800 (r) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 1.30 1.04 0.874 0.748 0.643 0.550 0.461 0.371 0.268 0.199 -- -- --03166800 (w) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.160 0.124 0.100 0.087 0.074 0.062 0.050 0.038 0.026 0.024 -- -- --03167000 (p) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 86.1 79.3 74.1 69.5 65.2 60.8 56.0 50.6 43.2 37.4 31.3 27.5 24.303167000 (r) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 59.2 50.1 44.2 39.5 35.5 31.8 28.2 24.3 19.5 16.0 -- -- --03167000 (w) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 85.5 78.7 73.5 68.9 64.5 60.2 55.5 50.1 42.7 37.0 -- -- --03167500 (p) Big Reed Island Creek below Route 693 near Allisonia, Va. 267 63 0 197 172 156 143 133 122 112 102 88.5 78.8 69.0 63.2 58.303167500 (r) Big Reed Island Creek below Route 693 near Allisonia, Va. 267 63 0 95.8 75.5 62.3 52.6 44.0 36.6 29.5 22.6 14.9 -- -- -- --03167500 (w) Big Reed Island Creek below Route 693 near Allisonia, Va. 267 63 0 195 170 154 142 131 121 111 100 87.5 -- -- -- --03168000 (p) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,216 1,064 968 894 830 772 715 654 580 526 472 440 41203168000 (r) New River along Route 653 at Allisonia, Va. 2,212 76 0 995 836 727 648 574 512 447 383 307 -- -- -- --03168000 (w) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,211 1,059 963 889 826 768 711 650 576 -- -- -- --03168500 (p) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 4.06 2.66 2.02 1.64 1.37 1.16 0.990 0.840 0.690 0.600 0.530 0.490 0.47003168500 (r) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 12.7 10.5 9.09 7.98 7.05 6.20 5.37 4.50 3.47 2.73 -- -- --03168500 (w) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 4.28 2.86 2.20 1.80 1.51 1.28 1.10 0.926 0.752 0.646 -- -- --03170000 (p) Little River at Route 693 at Graysontown (Graysonton), Va. 309 78 0 165 140 124 111 101 91.1 81.8 72.0 60.1 51.8 43.6 38.9 35.003170000 (r) Little River at Route 693 at Graysontown (Graysonton), Va. 309 78 0 113 89.1 73.8 62.5 52.5 44.0 35.6 27.5 18.4 -- -- -- --03170000 (w) Little River at Route 693 at Graysontown (Graysonton), Va. 309 78 0 164 139 123 110 99.8 90.3 81.0 71.2 59.6 -- -- -- --03171000 (p) New River below Route 11 at Radford, Va. 2,767 75 0 1,245 1,101 1,014 950 897 850 805 758 704 667 631 611 59403171000 (r) New River below Route 11 at Radford, Va. 2,767 75 0 1,274 1,078 943 845 753 676 596 517 422 -- -- -- --03171000 (w) New River below Route 11 at Radford, Va. 2,767 75 0 1,246 1,100 1,013 948 894 846 801 755 700 -- -- -- --03171500 (p) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,419 1,240 1,129 1,045 974 909 846 780 701 643 587 553 52503171500 (r) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,374 1,164 1,020 916 818 736 651 566 465 -- -- -- --03171500 (w) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,418 1,239 1,127 1,042 971 906 843 777 697 -- -- -- --03173000 (p) Walker Creek below Route 100 at Bane, Va. 299 68 0 62.8 52.9 47.3 43.2 39.9 37.1 34.4 31.8 28.8 26.8 24.9 23.9 23.103173000 (r) Walker Creek below Route 100 at Bane, Va. 299 68 0 69.2 58.8 51.9 46.5 41.9 37.6 33.4 28.8 23.3 19.2 -- -- --03173000 (w) Walker Creek below Route 100 at Bane, Va. 299 68 0 62.9 53.1 47.4 43.3 40.0 37.1 34.4 31.7 28.7 26.7 -- -- --
Table 4. (1-day averaged, adjusted low flow) 47

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

03175500 (p) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 50.0 43.1 38.6 35.0 31.9 29.0 26.2 23.1 19.3 16.6 13.9 12.4 11.0

03175500 (r) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 50.7 42.8 37.7 33.6 30.2 27.0 23.9 20.5 16.4 13.4 -- -- --03175500 (w) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 50.0 43.1 38.6 35.0 31.9 29.0 26.1 23.1 19.3 16.6 -- -- --03176500 (p) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 1,670 1,481 1,362 1,270 1,191 1,118 1,047 971 878 810 742 701 66603176500 (r) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 1,802 1,538 1,357 1,226 1,102 999 891 785 660 -- -- -- --03176500 (w) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 1,673 1,483 1,362 1,269 1,189 1,116 1,044 968 875 -- -- -- --03177700 (p) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 13.4 11.2 9.88 8.95 8.20 7.55 6.94 6.33 5.63 5.16 4.72 4.47 4.27

03177700 (r) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 8.07 6.63 5.70 4.98 4.38 3.83 3.29 2.74 2.08 1.62 -- -- --

03177700 (w) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 13.3 11.1 9.79 8.87 8.12 7.47 6.87 6.26 5.56 5.10 -- -- --

03177710 (p) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 13.4 12.1 11.3 10.6 9.91 9.30 8.67 7.98 7.07 6.38 5.67 5.22 4.8403177710 (r) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 9.07 7.46 6.43 5.62 4.95 4.33 3.74 3.11 2.37 1.85 -- -- --03177710 (w) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 13.3 12.0 11.1 10.4 9.81 9.20 8.57 7.89 6.98 6.30 -- -- --03207500 (p) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 19.4 13.5 9.98 7.55 5.70 4.21 2.97 1.91 0.980 0.530 0.250 0.150 0.09003207500 (r) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 37.6 28.7 23.1 19.0 15.6 12.6 9.95 7.36 4.47 -- -- -- --03207500 (w) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 32.5 24.2 19.0 15.2 12.1 9.34 6.95 4.73 2.45 -- -- -- --03207800 (p) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 45.3 37.4 32.2 28.1 24.6 21.4 18.3 15.1 11.3 8.78 6.48 5.23 4.2703207800 (r) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 45.1 34.5 27.8 22.9 19.0 15.4 12.2 9.16 5.75 -- -- -- --03207800 (w) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 45.2 35.6 29.7 25.2 21.6 18.5 15.6 12.7 9.59 -- -- -- --03208500 (p) Russell Fork below Route 63 at Haysi, Va. 286 79 0 30.2 20.8 15.4 11.6 8.68 6.38 4.48 2.86 1.44 0.770 0.360 0.210 0.12003208500 (r) Russell Fork below Route 63 at Haysi, Va. 286 79 0 43.7 33.4 26.9 22.2 18.3 14.9 11.8 8.82 5.50 -- -- -- --03208500 (w) Russell Fork below Route 63 at Haysi, Va. 286 79 0 39.9 29.7 23.4 18.7 14.9 11.6 8.70 5.98 3.17 -- -- -- --03208700 (p) North Fork Pound River below dam at Pound, Va. 18.5 25 0 5.40 3.64 2.59 1.86 1.31 0.900 0.570 0.320 0.120 0.050 0.020 0.010 0.00003208700 (r) North Fork Pound River below dam at Pound, Va. 18.5 25 0 4.43 3.28 2.56 2.03 1.58 1.21 0.873 0.567 0.231 -- -- -- --03208700 (w) North Fork Pound River below dam at Pound, Va. 18.5 25 0 4.63 3.36 2.57 1.98 1.51 1.12 0.772 0.473 0.178 -- -- -- --03208800 (p) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 7.29 6.63 5.97 5.31 4.64 3.93 3.18 2.36 1.41 0.840 0.420 0.240 0.14003208800 (r) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 7.85 5.87 4.61 3.69 2.92 2.27 1.67 1.13 0.510 -- -- -- --03208800 (w) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 7.65 6.15 5.15 4.37 3.69 3.07 2.46 1.84 1.11 -- -- -- --03208850 (p) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 10.4 9.66 8.92 8.17 7.36 6.50 5.55 4.43 3.02 2.05 1.21 0.810 0.54003208850 (r) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 12.0 9.04 7.16 5.76 4.62 3.63 2.72 1.88 0.923 -- -- -- --03208850 (w) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 -- -- -- -- -- -- -- -- -- -- -- -- --03208900 (p) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 13.6 11.4 9.82 8.55 7.42 6.36 5.32 4.24 2.99 2.16 1.45 1.09 0.82003208900 (r) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 15.1 11.4 9.05 7.31 5.89 4.66 3.53 2.47 1.27 -- -- -- --03208900 (w) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 14.5 11.4 9.37 7.86 6.60 5.51 4.50 3.52 2.45 -- -- -- --03208950 (p) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 13.6 10.3 8.31 6.85 5.67 4.66 3.73 2.85 1.91 1.35 0.890 0.670 0.50003208950 (r) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 12.9 9.70 7.69 6.20 4.97 3.91 2.95 2.04 1.02 -- -- -- --03208950 (w) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 13.2 9.93 7.93 6.47 5.28 4.27 3.35 2.50 1.61 -- -- -- --03209000 (p) Pound River near Haysi, Va. 221 79 0 39.2 25.9 18.4 13.3 9.54 6.66 4.40 2.59 1.14 0.540 0.210 0.110 0.06003209000 (r) Pound River near Haysi, Va. 221 79 0 35.2 26.8 21.6 17.7 14.6 11.8 9.24 6.81 4.08 -- -- -- --03209000 (w) Pound River near Haysi, Va. 221 79 0 36.1 26.6 20.7 16.5 13.1 10.1 7.46 5.05 2.57 -- -- -- --03209200 (p) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 99.7 82.8 69.9 58.9 49.0 39.7 30.9 22.1 12.8 7.60 3.88 2.35 1.4303209200 (r) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 72.7 55.9 45.4 37.8 31.6 26.1 21.1 16.2 11.1 -- -- -- --03209200 (w) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 82.0 65.5 54.6 46.2 39.0 32.4 26.0 19.5 12.2 -- -- -- --
48 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 1-day averaged, adjusted low flow (ft3/s) 03471500 (p) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 34.5 30.9 28.3 26.2 24.3 22.4 20.5 18.3 15.6 13.5 11.4 10.1 8.98 03471500 (r) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 16.2 13.5 11.7 10.3 9.13 8.05 7.00 5.89 4.57 3.62 -- -- -- 03471500 (w) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 03472500 (p) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 14.8 12.6 11.1 9.79 8.65 7.57 6.50 5.35 3.98 3.04 2.18 1.71 1.36 03472500 (r) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 11.6 9.54 8.24 7.23 6.38 5.60 4.85 4.05 3.11 2.45 -- -- -- 03472500 (w) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 14.7 12.5 11.0 9.73 8.60 7.53 6.46 5.32 3.96 3.03 -- -- -- 03473000 (p) South Fork Holston River above Route 58 near Damascus, Va. 303 75 0 133 117 106 98.5 91.7 85.5 79.4 72.9 64.9 59.1 53.3 49.8 46.9

03473000 (r) South Fork Holston River above Route 58 near 

Damascus, Va. 

303 75 0 70.2 59.6 52.7 47.1 42.5 38.2 33.9 29.3 23.6 19.5 -- -- --

03473000 (w) South Fork Holston River above Route 58 near 

Damascus, Va. 

303 75 0 131 115 105 97.4 90.7 84.5 78.5 72.1 64.1 58.4 -- -- --

03473500 (p) Middle Fork Holston River at Route 679 at Groseclose, Va. 7.4 11 0 3.79 3.56 3.39 3.25 3.11 2.98 2.83 2.66 2.43 2.25 2.04 1.91 1.8003473500 (r) Middle Fork Holston River at Route 679 at Groseclose, Va. 7.4 11 0 1.35 1.08 0.908 0.777 0.668 0.571 0.480 0.386 0.280 0.207 -- -- --03473500 (w) Middle Fork Holston River at Route 679 at Groseclose, Va. 7.4 11 0 3.74 3.51 3.34 3.20 3.06 2.93 2.78 2.62 2.39 2.21 -- -- --03474000 (p) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 46.0 40.2 36.6 33.9 31.5 29.3 27.2 25.0 22.3 20.3 18.3 17.1 16.1

03474000 (r) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 29.0 24.3 21.2 18.8 16.8 14.9 13.1 11.1 8.75 7.06 -- -- --

03474000 (w) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 45.6 39.9 36.3 33.6 31.2 29.0 26.9 24.7 22.0 20.0 -- -- --

03474500 (p) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 55.9 47.1 41.3 36.9 33.0 29.5 26.1 22.5 18.1 15.1 12.1 10.5 9.10

03474500 (r) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 33.9 28.5 24.9 22.1 19.8 17.6 15.5 13.2 10.4 8.45 -- -- --

03474500 (w) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 55.4 46.6 41.0 36.5 32.7 29.2 25.8 22.3 17.9 14.9 -- -- --

03475000 (p) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 81.8 69.9 61.0 53.4 46.4 39.8 33.1 26.1 17.9 12.5 7.98 5.73 4.1403475000 (r) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 46.6 39.3 34.5 30.8 27.6 24.7 21.8 18.7 14.9 12.2 -- -- --03475000 (w) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 81.0 69.2 60.4 52.9 46.0 39.4 32.9 25.9 17.8 12.5 -- -- --03477500 (p) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 6.80 5.76 5.15 4.71 4.35 4.04 3.75 3.45 3.11 2.87 2.65 2.53 2.43

03477500 (r) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 2.60 2.10 1.78 1.54 1.33 1.15 0.972 0.791 0.584 0.441 -- -- --

03477500 (w) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 6.71 5.68 5.08 4.64 4.29 3.98 3.69 3.40 3.06 2.83 -- -- --
Table 4. (1-day averaged, adjusted low flow) 49

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

03478400 (p) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 14.2 12.7 11.7 11.0 10.4 9.78 9.24 8.66 7.96 7.47 6.97 6.68 6.44

03478400 (r) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 5.34 4.35 3.73 3.24 2.83 2.46 2.11 1.74 1.31 1.01 -- -- --03478400 (w) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 14.0 12.5 11.5 10.8 10.2 9.63 9.10 8.53 7.84 7.36 -- -- --03488000 (p) North Fork Holston River along Route 91 near 

Saltville, Va. 

221 86 0 43.7 42.6 41.0 39.0 36.5 33.6 29.9 25.1 18.3 13.1 8.13 5.59 3.79

03488000 (r) North Fork Holston River along Route 91 near 

Saltville, Va. 

221 86 0 50.2 42.4 37.3 33.3 29.9 26.7 23.6 20.3 16.2 13.3 -- -- --

03488000 (w) North Fork Holston River along Route 91 near 

Saltville, Va. 

221 86 0 43.8 42.6 40.9 38.9 36.4 33.4 29.7 25.0 18.3 13.1 -- -- --

03489500 (p) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 119 99.7 87.0 77.2 68.7 60.9 53.4 45.5 36.0 29.5 23.3 19.8 17.0

03489500 (r) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 118 101 89.7 80.8 73.3 66.3 59.3 51.6 42.3 35.4 -- -- --

03489500 (w) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 119 99.7 87.1 77.2 68.8 61.0 53.5 45.6 36.1 29.6 -- -- --

03489900 (p) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 18.0 14.6 12.4 10.8 9.42 8.18 7.00 5.80 4.41 3.48 2.64 2.18 1.8203489900 (r) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 16.9 14.1 12.2 10.8 9.53 8.41 7.32 6.16 4.78 3.80 -- -- --03489900 (w) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 17.9 14.6 12.4 10.8 9.42 8.19 7.01 5.81 4.42 3.49 -- -- --03490000 (p) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 140 116 102 92.1 83.6 76.1 68.9 61.6 53.1 47.1 41.5 38.2 35.5

03490000 (r) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 164 141 126 114 104 93.9 84.4 74.0 61.1 51.6 -- -- --

03490000 (w) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 140 117 103 92.5 84.0 76.4 69.2 61.9 53.2 47.2 -- -- --

03521500 (p) Clinch River along Route 707 at Richlands, Va. 137 43 0 33.3 27.9 24.6 22.1 19.9 18.0 16.1 14.2 11.8 10.2 8.60 7.67 6.9103521500 (r) Clinch River along Route 707 at Richlands, Va. 137 43 0 30.2 25.3 22.1 19.6 17.5 15.6 13.6 11.6 9.15 7.38 -- -- --03521500 (w) Clinch River along Route 707 at Richlands, Va. 137 43 0 33.2 27.9 24.6 22.0 19.9 17.9 16.1 14.1 11.8 10.1 -- -- --03524000 (p) Clinch River above Route 661 at Cleveland, Va. 533 86 0 122 102 90.4 81.6 74.3 67.8 61.6 55.3 47.8 42.6 37.5 34.6 32.203524000 (r) Clinch River above Route 661 at Cleveland, Va. 533 86 0 128 110 97.7 88.1 80.0 72.4 64.8 56.5 46.4 39.0 -- -- --03524000 (w) Clinch River above Route 661 at Cleveland, Va. 533 86 0 122 102 90.5 81.7 74.4 67.9 61.7 55.3 47.7 42.5 -- -- --03524500 (p) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 15.9 10.6 7.99 6.29 5.05 4.06 3.23 2.48 1.73 1.29 0.940 0.760 0.63003524500 (r) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 16.2 12.2 9.70 7.85 6.34 5.02 3.81 2.68 1.39 -- -- -- --03524500 (w) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 16.1 11.6 9.06 7.23 5.79 4.57 3.52 2.57 1.61 -- -- -- --03525000 (p) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03525000 (r) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 9.07 7.40 6.36 5.59 4.93 4.34 3.77 3.20 2.52 2.07 1.64 1.40 1.2103525000 (w) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03526000 (p) Copper Creek at Route 619 near Gate City, Va. 106 26 0 33.9 30.7 28.4 26.4 24.6 22.9 21.1 19.0 16.3 14.3 12.1 10.8 9.7203526000 (r) Copper Creek at Route 619 near Gate City, Va. 106 26 0 23.0 19.2 16.7 14.8 13.1 11.6 10.2 8.60 6.73 5.39 -- -- --03526000 (w) Copper Creek at Route 619 near Gate City, Va. 106 26 0 33.7 30.4 28.1 26.2 24.4 22.6 20.8 18.8 16.1 14.1 -- -- --03527000 (p) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 245 203 179 161 146 133 121 108 93.8 83.9 74.5 69.1 64.703527000 (r) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 283 246 221 201 184 168 152 135 113 97.0 -- -- --03527000 (w) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 246 204 180 161 147 134 121 109 94.2 84.2 -- -- --03527500 (p) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03527500 (r) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03527500 (w) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03529500 (p) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 29.8 24.2 20.6 17.9 15.6 13.5 11.6 9.53 7.21 5.65 4.24 3.48 2.8803529500 (r) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 20.0 15.1 12.0 9.77 7.93 6.31 4.84 3.45 1.86 -- -- -- --03529500 (w) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 23.8 18.8 15.7 13.4 11.6 10.0 8.54 7.12 5.56 -- -- -- --
50 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 1-day averaged, adjusted low flow (ft3/s)

03530000 (p) South Fork Powell River at Route 23 at Big Stone 

Gap, Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530000 (r) South Fork Powell River at Route 23 at Big Stone 

Gap, Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530000 (w) South Fork Powell River at Route 23 at Big Stone 

Gap, Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530500 (p) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 1 8.33 6.60 5.31 4.25 3.31 2.47 1.69 0.930 0.110 0.000 0.000 0.000 0.000

03530500 (r) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 1 13.7 10.3 8.15 6.58 5.29 4.17 3.15 2.19 1.10 -- -- -- --

03530500 (w) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 1 12.0 9.06 7.16 5.71 4.50 3.43 2.46 1.53 0.485 -- -- -- --

03531000 (p) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 50.6 37.0 30.1 25.6 22.1 19.3 16.9 14.6 12.1 10.6 9.27 8.56 8.0103531000 (r) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 44.2 33.8 27.2 22.4 18.6 15.1 12.0 8.94 5.59 -- -- -- --03531000 (w) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 46.7 35.1 28.5 23.8 20.2 17.2 14.7 12.3 10.1 -- -- -- --03531500 (p) Powell River at Route 70 near Jonesville, Va. 319 75 0 72.2 60.0 52.5 46.8 42.1 37.9 33.8 29.6 24.6 21.2 17.8 15.9 14.403531500 (r) Powell River at Route 70 near Jonesville, Va. 319 75 0 47.9 36.6 29.6 24.4 20.2 16.5 13.1 9.84 6.24 -- -- -- --03531500 (w) Powell River at Route 70 near Jonesville, Va. 319 75 0 57.7 46.4 39.6 34.8 30.9 27.7 24.8 22.0 19.2 -- -- -- --
Table 4. (4-day averaged, adjusted low flow) 51

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01484800 (p) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 8 0.240 0.170 0.120 0.090 0.070 0.040 0.020 0.000 0.000 0.000 0.000 0.000 0.00001484800 (r) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 8 0.444 0.314 0.229 0.169 0.125 0.085 -- -- -- -- -- -- --01484800 (w) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 8 0.265 0.187 0.132 0.098 0.076 0.044 -- -- -- -- -- -- --01613900 (p) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 1.78 1.37 1.12 0.940 0.800 0.670 0.550 0.440 0.310 0.240 0.170 0.130 0.11001613900 (r) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 3.18 2.56 2.18 1.89 1.65 1.43 1.23 1.02 0.778 0.617 0.468 0.382 0.32401613900 (w) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 1.82 1.40 1.15 0.963 0.821 0.688 0.566 0.453 0.320 0.248 0.176 0.135 0.11401614830 (p) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 6.55 4.47 3.42 2.73 2.21 1.80 1.45 1.13 0.810 0.620 0.460 0.380 0.32001614830 (r) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 3.03 2.44 2.07 1.80 1.57 1.36 1.17 0.965 0.737 0.584 0.442 0.361 0.30601614830 (w) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 6.45 4.41 3.38 2.71 2.19 1.79 1.44 1.13 0.808 0.619 0.460 0.380 0.32001615000 (p) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 12.0 9.15 7.40 6.08 5.00 4.06 3.20 2.38 1.52 1.02 0.630 0.440 0.32001615000 (r) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 12.7 10.5 9.04 7.97 7.05 6.24 5.47 4.64 3.68 3.02 2.39 2.02 1.7501615000 (w) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 12.0 9.19 7.44 6.13 5.06 4.12 3.26 2.44 1.57 1.07 0.670 0.474 0.34901615500 (p) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 2.42 2.29 2.18 2.08 1.97 1.85 1.71 1.55 1.31 1.12 0.900 0.770 0.66001615500 (r) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 1.10 0.873 0.733 0.628 0.541 0.465 0.392 0.319 0.237 0.183 0.134 0.107 0.08901615500 (w) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 2.39 2.26 2.15 2.05 1.94 1.82 1.68 1.53 1.29 1.10 0.887 0.759 0.65101616000 (p) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 13.7 11.9 10.8 9.94 9.19 8.49 7.81 7.08 6.18 5.52 4.87 4.48 4.1401616000 (r) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 3.41 2.75 2.34 2.04 1.78 1.55 1.33 1.10 0.843 0.670 0.509 0.417 0.35401616000 (w) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 13.5 11.7 10.6 9.78 9.04 8.35 7.68 6.96 6.08 5.43 4.79 4.41 4.0801616100 (p) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 6.62 5.66 5.04 4.57 4.16 3.78 3.42 3.03 2.55 2.21 1.88 1.69 1.5201616100 (r) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 2.14 1.72 1.45 1.26 1.09 0.944 0.805 0.661 0.501 0.393 0.294 0.238 0.20101616100 (w) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 6.52 5.57 4.96 4.50 4.09 3.72 3.37 2.98 2.51 2.18 1.85 1.67 1.5001620500 (p) North River above Forest Road near Stokesville, Va. 17.3 59 0 2.17 1.46 1.10 0.860 0.690 0.550 0.430 0.320 0.220 0.160 0.110 0.080 0.07001620500 (r) North River above Forest Road near Stokesville, Va. 17.3 59 0 3.48 2.81 2.39 2.07 1.81 1.58 1.35 1.12 0.861 0.684 0.520 0.426 0.36201620500 (w) North River above Forest Road near Stokesville, Va. 17.3 59 0 2.21 1.50 1.14 0.894 0.722 0.579 0.455 0.341 0.236 0.173 0.120 0.088 0.07601621050 (p) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 4.46 2.58 1.80 1.35 1.05 0.830 0.650 0.510 0.370 0.300 0.240 0.210 0.19001621050 (r) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 2.84 2.28 1.94 1.68 1.46 1.27 1.09 0.899 0.685 0.542 0.410 0.334 0.28301621050 (w) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 4.41 2.57 1.80 1.36 1.06 0.843 0.663 0.521 0.379 0.306 0.244 0.213 0.19201622000 (p) North River along Route 693 near Burketown, Va. 376 75 0 101 83.0 72.5 64.8 58.6 53.2 48.2 43.2 37.4 33.4 29.7 27.6 25.901622000 (r) North River along Route 693 near Burketown, Va. 376 75 0 93.2 79.0 70.0 63.1 57.1 51.8 46.7 41.1 34.3 29.7 24.9 22.1 19.901622000 (w) North River along Route 693 near Burketown, Va. 376 75 0 101 82.9 72.4 64.8 58.6 53.2 48.2 43.1 37.3 33.3 29.6 27.5 25.801624000 (p) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 1 0.500 0.310 0.220 0.160 0.130 0.090 0.070 0.040 0.000 0.000 0.000 0.000 0.000

01624000 (r) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 1 1.90 1.52 1.28 1.11 0.959 0.829 0.705 0.578 0.437 0.342 0.255 0.206 0.173

01624000 (w) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 1 0.543 0.346 0.251 0.188 0.154 0.111 0.088 0.055 0.012 0.009 0.006 0.005 0.004

01624300 (p) Middle River at Route 742 near Verona, Va. 179 18 0 62.8 53.6 48.0 43.8 40.4 37.3 34.4 31.3 27.7 25.1 22.7 21.2 20.001624300 (r) Middle River at Route 742 near Verona, Va. 179 18 0 42.2 35.3 31.0 27.7 24.9 22.3 19.9 17.2 14.1 12.0 9.81 8.54 7.5701624300 (w) Middle River at Route 742 near Verona, Va. 179 18 0 62.3 53.2 47.6 43.5 40.1 37.0 34.1 31.0 27.4 24.9 22.4 21.0 19.801624800 (p) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 28.5 24.3 21.7 19.7 18.1 16.5 15.0 13.5 11.6 10.2 8.88 8.10 7.4401624800 (r) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 16.2 13.4 11.6 10.2 9.09 8.07 7.09 6.04 4.82 3.99 3.18 2.70 2.3601624800 (w) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 28.2 24.1 21.5 19.5 17.9 16.3 14.9 13.3 11.4 10.1 8.78 8.01 7.3601625000 (p) Middle River at Route 769 near Grottoes, Va. 373 78 0 118 105 95.1 87.1 79.7 72.7 65.5 57.5 47.3 39.8 32.2 27.8 24.101625000 (r) Middle River at Route 769 near Grottoes, Va. 373 78 0 92.4 78.3 69.4 62.5 56.6 51.3 46.3 40.7 34.0 29.4 24.7 21.9 19.701625000 (w) Middle River at Route 769 near Grottoes, Va. 373 78 0 118 104 94.6 86.5 79.2 72.2 65.1 57.1 47.0 39.6 32.1 27.7 24.001625900 (p) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 -- -- -- -- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00001625900 (r) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 12.9 9.80 7.81 6.32 5.08 4.00 3.04 2.11 1.20 0.662 -- -- --01625900 (w) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 -- -- -- -- -- -- -- -- -- -- -- -- --
52 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 4-day averaged, adjusted low flow (ft3/s) 01626000 (p) South River at Route 664 near Waynesboro, Va. 127 54 0 45.3 39.7 36.2 33.6 31.4 29.4 27.4 25.4 23.0 21.3 19.6 18.6 17.7 01626000 (r) South River at Route 664 near Waynesboro, Va. 127 54 0 29.2 24.4 21.3 18.9 16.9 15.1 13.4 11.5 9.36 7.85 6.38 5.50 4.84 01626000 (w) South River at Route 664 near Waynesboro, Va. 127 54 0 45.0 39.3 35.9 33.3 31.1 29.1 27.2 25.1 22.7 21.0 19.3 18.4 17.5 01626500 (p) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 53.4 46.3 41.9 38.6 35.8 33.3 30.8 28.3 25.2 23.0 20.8 19.5 18.4 01626500 (r) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 30.7 25.6 22.4 19.9 17.8 15.9 14.1 12.2 9.89 8.31 6.76 5.83 5.14 01626500 (w) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 52.9 45.8 41.5 38.2 35.4 32.9 30.5 28.0 24.9 22.7 20.5 19.3 18.2 01626850 (p) South River at Hopeman Parkway near Dooms, Va. 148 22 0 75.0 66.3 61.5 58.1 55.3 53.1 51.0 49.0 46.9 45.6 44.6 44.1 43.7 01626850 (r) South River at Hopeman Parkway near Dooms, Va. 148 22 0 34.4 28.7 25.2 22.4 20.1 18.0 16.0 13.8 11.2 9.47 7.73 6.69 5.91 01626850 (w) South River at Hopeman Parkway near Dooms, Va. 148 22 0 74.1 65.5 60.7 57.3 54.6 52.3 50.3 48.3 46.2 45.0 43.9 43.4 43.1 01627500 (p) South River at Route 778 at Harriston, Va. 212 65 0 88.3 79.6 73.8 69.1 64.9 60.9 56.9 52.5 46.8 42.6 38.2 35.4 33.1 01627500 (r) South River at Route 778 at Harriston, Va. 212 65 0 50.5 42.4 37.3 33.4 30.0 27.0 24.2 21.0 17.3 14.7 12.1 10.6 9.43

01627500 (w) South River at Route 778 at Harriston, Va. 212 65 0 87.5 78.8 73.0 68.3 64.2 60.2 56.2 51.9 46.3 42.1 37.7 35.0 32.701628060 (p) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 11 0.030 0.020 0.020 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01628060 (r) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 11 0.432 0.299 0.220 0.164 0.121 0.087 0.058 0.035 0.015 0.006 -- -- --

01628060 (w) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 11 0.040 0.026 0.024 0.004 0.002 0.002 0.001 0.001 0.000 0.000 -- -- --

01628500 (p) South Fork Shenandoah River below Lower Lewis 

Run near Lynnwood, Va. 

1,079 75 0 358 306 273 249 228 209 190 171 148 131 115 105 97.3

01628500 (r) South Fork Shenandoah River below Lower Lewis 

Run near Lynnwood, Va. 

1,079 75 0 287 248 222 203 186 171 157 141 121 108 93.9 85.6 78.3

01628500 (w) South Fork Shenandoah River below Lower Lewis 

Run near Lynnwood, Va. 

1,079 75 0 356 305 272 248 227 208 190 170 147 131 114 105 96.9

01629500 (p) South Fork Shenandoah River at Route 211 near 

Luray, Va. 

1,372 44 0 492 419 375 342 315 290 267 243 215 195 176 165 156

01629500 (r) South Fork Shenandoah River at Route 211 near 

Luray, Va. 

1,372 44 0 371 321 290 265 244 225 207 186 162 145 127 116 107

01629500 (w) South Fork Shenandoah River at Route 211 near 

Luray, Va. 

1,372 44 0 489 417 373 340 313 289 266 242 214 194 175 164 155

01630700 (p) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 3.74 2.17 1.53 1.17 0.930 0.760 0.620 0.510 0.400 0.340 0.290 0.270 0.26001630700 (r) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 5.99 4.45 3.48 2.76 2.18 1.68 1.24 0.833 0.442 0.227 -- -- --01630700 (w) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 3.81 2.24 1.59 1.21 0.963 0.783 0.634 0.517 0.401 0.338 -- -- --01631000 (p) South Fork Shenandoah River below Route 619 at 

Front Royal, Va. 

1,634 76 0 528 453 406 372 343 317 292 266 235 213 192 179 169

01631000 (r) South Fork Shenandoah River below Route 619 at 

Front Royal, Va. 

1,634 76 0 447 388 351 322 297 274 253 229 199 179 158 146 134

01631000 (w) South Fork Shenandoah River below Route 619 at 

Front Royal, Va. 

1,634 76 0 527 451 405 371 342 316 291 265 234 212 191 178 168

01632000 (p) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 10.3 6.89 5.08 3.89 3.01 2.31 1.74 1.23 0.750 0.490 0.300 0.210 0.150

01632000 (r) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 50.0 42.0 36.9 33.1 29.7 26.8 23.9 20.8 17.1 14.5 12.0 10.5 9.32

01632000 (w) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 11.6 8.03 6.10 4.81 3.85 3.07 2.42 1.81 1.22 0.873 0.609 0.471 0.372
Table 4. (4-day averaged, adjusted low flow) 53

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01632082 (p) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 12.6 9.80 8.20 7.07 6.16 5.38 4.66 3.95 3.16 2.64 2.16 1.90 1.6901632082 (r) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 9.81 8.04 6.93 6.09 5.38 4.75 4.14 3.49 2.75 2.25 1.76 1.48 1.2801632082 (w) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 12.5 9.76 8.17 7.05 6.14 5.37 4.65 3.94 3.15 2.63 2.15 1.89 1.6801632900 (p) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 26.4 21.3 18.1 15.8 13.9 12.2 10.5 8.91 7.02 5.75 4.58 3.92 3.4001632900 (r) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 21.1 17.5 15.2 13.5 12.0 10.7 9.44 8.08 6.50 5.41 4.34 3.72 3.2601632900 (w) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 26.3 21.2 18.1 15.7 13.8 12.1 10.5 8.89 7.01 5.74 4.58 3.92 3.4001633000 (p) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 78.1 64.6 55.0 47.0 39.9 33.4 27.1 20.7 13.5 9.07 5.51 3.83 2.68

01633000 (r) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 128 109 97.3 88.1 80.0 72.9 66.0 58.4 49.2 42.9 36.4 32.6 29.4

01633000 (w) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 79.4 65.8 56.0 48.0 40.9 34.4 28.0 21.5 14.3 9.80 6.15 4.40 3.19

01633500 (p) Stony Creek along Route 675 at Columbia Furnace, 

Va. 

77.5 8 0 10.7 9.12 8.24 7.62 7.11 6.68 6.28 5.89 5.44 5.15 4.89 4.75 4.64

01633500 (r) Stony Creek along Route 675 at Columbia Furnace, 

Va. 

77.5 8 0 17.2 14.3 12.4 10.9 9.73 8.64 7.60 6.48 5.18 4.29 3.43 2.92 2.55

01633500 (w) Stony Creek along Route 675 at Columbia Furnace, 

Va. 

77.5 8 0 10.8 9.23 8.33 7.69 7.16 6.72 6.31 5.90 5.44 5.13 4.86 4.72 4.61

01634000 (p) North Fork Shenandoah River at Route 55 near 

Strasburg, Va. 

770 81 0 161 136 121 110 99.8 91.0 82.4 73.5 62.8 55.2 47.8 43.5 39.9

01634000 (r) North Fork Shenandoah River at Route 55 near 

Strasburg, Va. 

770 81 0 200 172 154 140 128 117 107 94.9 80.9 71.3 61.4 55.5 50.5

01634000 (w) North Fork Shenandoah River at Route 55 near 

Strasburg, Va. 

770 81 0 162 137 122 110 100 91.5 82.9 73.9 63.2 55.5 48.1 43.7 40.1

01634500 (p) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 13.9 11.4 9.91 8.77 7.83 6.98 6.17 5.35 4.38 3.71 3.07 2.71 2.4201634500 (r) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 23.1 19.2 16.7 14.8 13.2 11.8 10.4 8.93 7.20 6.01 4.84 4.15 3.6401634500 (w) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 14.1 11.6 10.1 8.90 7.95 7.08 6.26 5.42 4.44 3.75 3.10 2.74 2.4401635090 (p) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 40.3 30.3 25.1 21.5 18.8 16.5 14.5 12.6 10.5 9.22 8.05 7.41 6.9101635090 (r) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 35.9 30.0 26.3 23.4 21.0 18.8 16.7 14.5 11.8 9.94 8.12 7.04 6.2201635090 (w) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 40.2 30.3 25.1 21.6 18.8 16.6 14.6 12.6 10.6 9.23 8.05 7.40 6.9001635500 (p) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 5.49 4.36 3.68 3.17 2.75 2.38 2.04 1.69 1.29 1.03 0.790 0.660 0.56001635500 (r) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 19.4 16.1 14.0 12.4 11.0 9.79 8.62 7.37 5.91 4.91 3.93 3.36 2.9401635500 (w) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 5.83 4.64 3.92 3.38 2.94 2.55 2.19 1.81 1.39 1.11 0.851 0.710 0.60201636210 (p) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 1.27 0.890 0.680 0.540 0.440 0.350 0.280 0.210 0.140 0.100 0.070 0.060 0.04001636210 (r) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 3.91 2.87 2.23 1.75 1.36 1.04 0.757 0.497 0.255 0.126 -- -- --01636210 (w) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 1.35 0.947 0.722 0.572 0.463 0.366 0.290 0.216 0.142 0.100 -- -- --01636266 (p) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 2.63 1.58 1.15 0.920 0.760 0.640 0.550 0.480 0.410 0.380 0.350 0.340 0.34001636266 (r) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 1.39 0.990 0.750 0.574 0.436 0.323 0.227 0.142 0.067 0.030 -- -- --01636266 (w) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 2.56 1.55 1.13 0.904 0.746 0.627 0.538 0.467 0.399 0.370 -- -- --01636316 (p) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01636316 (r) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01636316 (w) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01638350 (p) South Fork Catoctin Creek at Route 698 near Waterford, Va. 31.6 5 0 10.8 5.21 3.07 1.95 1.27 0.830 0.520 0.300 0.140 0.080 0.040 0.020 0.01001638350 (r) South Fork Catoctin Creek at Route 698 near Waterford, Va. 31.6 5 0 9.72 7.31 5.79 4.65 3.71 2.90 2.18 1.50 0.826 0.445 -- -- --01638350 (w) South Fork Catoctin Creek at Route 698 near Waterford, Va. 31.6 5 0 -- -- -- -- -- -- -- -- -- -- -- -- --
54 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01638420 (p) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 5.76 2.53 1.36 0.770 0.440 0.230 0.100 0.000 0.000 0.000 0.000 0.000 0.000

01638420 (r) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 6.85 5.10 4.01 3.19 2.52 1.96 1.45 0.979 0.525 0.274 -- -- --

01638420 (w) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 5.85 2.73 1.56 0.946 0.583 0.342 0.181 0.057 0.026 0.013 -- -- --

01638480 (p) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 16.9 11.2 7.99 5.84 4.25 3.02 2.04 1.25 0.580 0.290 0.130 0.070 0.04001638480 (r) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 31.1 24.1 19.7 16.2 13.3 10.8 8.44 6.12 3.72 2.24 -- -- --01638480 (w) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 17.6 11.8 8.50 6.28 4.62 3.31 2.27 1.42 0.670 0.342 -- -- --01643590 (p) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 2.94 2.03 1.59 1.31 1.10 0.940 0.800 0.680 0.550 0.470 0.400 0.370 0.34001643590 (r) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 2.06 1.48 1.13 0.876 0.673 0.504 0.358 0.229 0.111 0.051 -- -- --01643590 (w) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 2.92 2.02 1.58 1.30 1.09 0.931 0.791 0.672 0.543 0.464 -- -- --01643700 (p) Goose Creek at Route 611 near Middleburg, Va. 122 32 3 22.9 12.7 7.84 4.95 3.07 1.80 0.930 0.350 0.010 0.000 0.000 0.000 0.00001643700 (r) Goose Creek at Route 611 near Middleburg, Va. 122 32 3 44.0 34.4 28.3 23.5 19.5 15.9 12.6 9.31 5.82 3.63 -- -- --01643700 (w) Goose Creek at Route 611 near Middleburg, Va. 122 32 3 24.6 14.4 9.35 6.30 4.20 2.71 1.63 0.871 0.296 0.167 -- -- --01643805 (p) North Fork Goose Creek at Route 729 near Lincoln, 

Va. 

38.1 4 0 16.5 8.58 5.59 3.98 2.96 2.24 1.70 1.27 0.880 0.680 0.520 0.450 0.400

01643805 (r) North Fork Goose Creek at Route 729 near Lincoln, 

Va. 

38.1 4 0 12.0 9.06 7.21 5.82 4.67 3.67 2.78 1.93 1.08 0.595 -- -- --

01643805 (w) North Fork Goose Creek at Route 729 near Lincoln, 

Va. 

38.1 4 0 16.3 8.60 5.65 4.04 3.02 2.28 1.73 1.29 0.885 0.678 -- -- --

01643880 (p) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 11.1 2.59 0.920 0.380 0.160 0.060 0.020 0.000 0.000 0.000 0.000 0.000 0.00001643880 (r) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 15.2 11.6 9.27 7.52 6.07 4.81 3.67 2.58 1.48 0.830 -- -- --01643880 (w) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 12.7 5.94 3.92 2.91 2.18 1.62 1.15 0.780 0.394 0.210 -- -- --01644000 (p) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 44.9 26.8 18.2 13.0 9.36 6.70 4.64 2.99 1.58 0.920 0.490 0.320 0.21001644000 (r) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 135 109 91.6 78.3 66.8 56.2 46.4 36.1 24.7 17.2 -- -- --01644000 (w) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 49.1 30.4 21.2 15.6 11.6 8.48 6.03 4.06 2.21 1.33 -- -- --01644280 (p) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 12.0 8.00 6.03 4.78 3.87 3.15 2.54 2.00 1.45 1.13 0.860 0.730 0.63001644280 (r) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 11.2 7.91 -- -- -- -- -- -- -- -- -- -- --01644280 (w) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 12.0 8.00 -- -- -- -- -- -- -- -- -- -- --01644295 (p) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 8 0.020 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00001644295 (r) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 8 0.171 0.127 0.098 0.073 0.053 0.033 -- -- -- -- -- -- --01644295 (w) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 8 0.027 0.015 0.004 0.003 0.002 0.001 -- -- -- -- -- -- --01645784 (p) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 19.5 16.7 14.3 12.2 10.2 8.20 6.29 4.37 2.38 1.31 0.590 0.330 0.18001645784 (r) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 0.362 0.272 0.210 0.160 0.117 0.075 -- -- -- -- -- -- --01645784 (w) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 18.8 16.1 13.8 11.8 9.82 7.94 -- -- -- -- -- -- --01646000 (p) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 19.5 16.7 14.3 12.2 10.2 8.20 6.29 4.37 2.38 1.31 0.590 0.330 0.18001646000 (r) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 14.5 11.3 9.10 7.36 5.82 4.35 -- -- -- -- -- -- --01646000 (w) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 19.3 16.5 14.1 12.0 10.0 8.07 -- -- -- -- -- -- --01652500 (p) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 3.49 2.81 2.41 2.11 1.87 1.66 1.46 1.25 1.02 0.860 0.710 0.630 0.56001652500 (r) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 2.39 1.64 1.19 0.873 0.634 0.423 -- -- -- -- -- -- --01652500 (w) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 3.38 2.70 2.30 2.01 1.77 1.57 -- -- -- -- -- -- --01653000 (p) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 5.76 4.60 3.91 3.40 2.99 2.63 2.29 1.95 1.56 1.29 1.05 0.920 0.81001653000 (r) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 5.77 3.91 2.81 2.06 1.49 0.980 -- -- -- -- -- -- --01653000 (w) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 5.76 4.54 3.81 3.29 2.87 2.51 -- -- -- -- -- -- --01654000 (p) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 2 5.83 4.41 3.43 2.66 2.02 1.48 1.01 0.590 0.220 0.050 0.000 0.000 0.00001654000 (r) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 2 6.80 5.24 4.19 3.35 2.60 1.89 -- -- -- -- -- -- --01654000 (w) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 2 5.88 4.45 3.47 2.69 2.05 1.50 -- -- -- -- -- -- --
Table 4. (4-day averaged, adjusted low flow) 55

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01654500 (p) Long Branch (Little Run) at Route 620 near Annandale, Va. 3.72 8 2 1.29 1.11 0.990 0.900 0.830 0.750 0.640 0.000 0.000 0.000 0.000 0.000 0.00001654500 (r) Long Branch (Little Run) at Route 620 near Annandale, Va. 3.72 8 2 1.37 1.04 0.818 0.637 0.478 0.324 -- -- -- -- -- -- --01654500 (w) Long Branch (Little Run) at Route 620 near Annandale, Va. 3.72 8 2 1.29 1.11 0.985 0.893 0.822 0.740 -- -- -- -- -- -- --01655000 (p) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 8.99 6.44 4.95 3.91 3.09 2.41 1.83 1.30 0.780 0.500 0.290 0.200 0.140

01655000 (r) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 6.25 4.23 3.04 2.23 1.61 1.06 -- -- -- -- -- -- --

01655000 (w) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 8.65 6.17 4.73 3.72 2.94 2.29 -- -- -- -- -- -- --

01655500 (p) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 1 1.60 1.09 0.810 0.610 0.460 0.350 0.250 0.160 0.080 0.030 0.000 0.000 0.00001655500 (r) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 1 3.63 2.66 2.06 1.61 1.26 0.957 0.694 0.455 0.231 0.113 -- -- --01655500 (w) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 1 1.68 1.15 0.852 0.643 0.485 0.368 0.262 0.168 0.083 0.032 -- -- --01656000 (p) Cedar Run at Route 806 near Catlett, Va. 93.4 51 7 3.82 2.50 1.70 1.14 0.730 0.430 0.210 0.050 0.000 0.000 0.000 0.000 0.00001656000 (r) Cedar Run at Route 806 near Catlett, Va. 93.4 51 7 14.3 10.2 -- -- -- -- -- -- -- -- -- -- --01656000 (w) Cedar Run at Route 806 near Catlett, Va. 93.4 51 7 5.02 3.36 -- -- -- -- -- -- -- -- -- -- --01656100 (p) Cedar Run at Route 611 near Aden, Va. 155 15 0 7.61 4.66 3.29 2.45 1.87 1.42 1.07 0.770 0.490 0.340 0.220 0.170 0.13001656100 (r) Cedar Run at Route 611 near Aden, Va. 155 15 0 26.4 19.3 -- -- -- -- -- -- -- -- -- -- --01656100 (w) Cedar Run at Route 611 near Aden, Va. 155 15 0 8.83 5.58 -- -- -- -- -- -- -- -- -- -- --01656120 (p) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656120 (r) Cedar Run at Route 646 near Aden, Va. 175 2 0 30.6 22.5 -- -- -- -- -- -- -- -- -- -- --01656120 (w) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656500 (p) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 8.48 6.09 4.71 3.73 2.98 2.35 1.80 1.30 0.800 0.520 0.310 0.220 0.16001656500 (r) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 16.3 12.4 9.97 8.10 6.55 5.20 3.98 2.80 1.61 0.914 -- -- --01656500 (w) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 8.73 6.28 4.86 3.85 3.07 2.42 1.85 1.33 0.815 0.527 -- -- --01656650 (p) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 11.9 7.83 5.86 4.61 3.71 3.00 2.41 1.88 1.35 1.04 0.790 0.660 0.56001656650 (r) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 31.2 24.2 19.7 16.2 13.3 10.8 8.45 6.13 3.72 2.25 -- -- --01656650 (w) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 12.5 8.30 6.23 4.92 3.95 3.18 2.54 1.97 1.39 1.06 -- -- --01656700 (p) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 17.7 12.3 9.09 6.82 5.08 3.70 2.55 1.59 0.770 0.390 0.170 0.090 0.050

01656700 (r) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 69.1 52.3 -- -- -- -- -- -- -- -- -- -- --

01656700 (w) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 21.7 15.3 -- -- -- -- -- -- -- -- -- -- --

01656725 (p) Bull Run at Route 705 near Catharpin, Va. 25.7 16 5 1.30 0.610 0.340 0.190 0.100 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.00001656725 (r) Bull Run at Route 705 near Catharpin, Va. 25.7 16 5 3.01 2.03 -- -- -- -- -- -- -- -- -- -- --01656725 (w) Bull Run at Route 705 near Catharpin, Va. 25.7 16 5 1.48 0.755 -- -- -- -- -- -- -- -- -- -- --01656960 (p) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 5.51 3.64 2.62 1.94 1.44 1.05 0.740 0.470 0.240 0.140 0.070 0.040 0.02001656960 (r) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 6.68 4.64 -- -- -- -- -- -- -- -- -- -- --01656960 (w) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 5.60 3.71 -- -- -- -- -- -- -- -- -- -- --01657000 (p) Bull Run at Route 616 near Manassas, Va. 146 30 0 6.97 4.31 3.01 2.19 1.62 1.19 0.850 0.560 0.310 0.190 0.110 0.070 0.05001657000 (r) Bull Run at Route 616 near Manassas, Va. 146 30 0 24.6 17.9 -- -- -- -- -- -- -- -- -- -- --01657000 (w) Bull Run at Route 616 near Manassas, Va. 146 30 0 8.27 5.28 -- -- -- -- -- -- -- -- -- -- --01657020 (p) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01657020 (r) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 24.8 18.1 -- -- -- -- -- -- -- -- -- -- --01657020 (w) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --
56 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01657415 (p) Bull Run above Yates Ford near Clifton, Va. 185 11 0 19.3 15.5 13.4 11.9 10.8 9.79 8.90 8.04 7.09 6.46 5.90 5.59 5.3501657415 (r) Bull Run above Yates Ford near Clifton, Va. 185 11 0 32.7 24.1 -- -- -- -- -- -- -- -- -- -- --01657415 (w) Bull Run above Yates Ford near Clifton, Va. 185 11 0 19.9 15.8 -- -- -- -- -- -- -- -- -- -- --01657500 (p) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 42.8 39.7 36.2 32.4 28.3 23.9 19.2 13.9 7.89 4.38 1.96 1.04 0.550

01657500 (r) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 128 98.8 -- -- -- -- -- -- -- -- -- -- --

01657500 (w) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 47.2 42.7 -- -- -- -- -- -- -- -- -- -- --

01657655 (p) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.340 0.190 0.120 0.080 0.060 0.040 0.030 0.020 0.010 0.010 0.000 0.000 0.00001657655 (r) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.845 0.592 0.430 0.317 0.232 0.157 -- -- -- -- -- -- --01657655 (w) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.431 0.260 0.171 0.118 0.086 0.056 -- -- -- -- -- -- --01658500 (p) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 15 0.510 0.300 0.200 0.130 0.080 0.040 0.010 0.000 0.000 0.000 0.000 0.000 0.00001658500 (r) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 15 2.54 1.94 1.54 1.21 0.919 0.639 -- -- -- -- -- -- --01658500 (w) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 15 0.622 0.386 0.267 0.181 0.118 0.067 -- -- -- -- -- -- --01658698 (p) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01658698 (r) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 0.826 0.624 0.487 0.376 0.279 0.185 -- -- -- -- -- -- --01658698 (w) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01659000 (p) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 2 0.380 0.270 0.190 0.140 0.090 0.050 0.020 0.000 0.000 0.000 0.000 0.000 0.000

01659000 (r) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 2 1.98 1.51 1.19 0.930 0.705 0.484 -- -- -- -- -- -- --

01659000 (w) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 2 0.460 0.329 0.235 0.174 0.115 0.068 -- -- -- -- -- -- --

01660000 (p) South Branch Chopawamsic Creek below Marine 

Road 1 near Garrisonville, Va. 

2.46 8 0 0.410 0.290 0.220 0.170 0.140 0.100 0.080 0.050 0.030 0.020 0.010 0.010 0.000

01660000 (r) South Branch Chopawamsic Creek below Marine 

Road 1 near Garrisonville, Va. 

2.46 8 0 0.962 0.728 0.569 0.440 0.328 0.219 -- -- -- -- -- -- --

01660000 (w) South Branch Chopawamsic Creek below Marine 

Road 1 near Garrisonville, Va. 

2.46 8 0 0.434 0.308 0.234 0.180 0.147 0.104 -- -- -- -- -- -- --

01660100 (p) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 3.62 1.55 0.780 0.410 0.200 0.090 0.030 0.000 0.000 0.000 0.000 0.000 0.00001660100 (r) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 3.94 2.69 1.93 1.42 1.03 0.681 -- -- -- -- -- -- --01660100 (w) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 3.76 2.02 1.24 0.801 0.508 0.291 -- -- -- -- -- -- --01660400 (p) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 1 5.57 2.78 1.59 0.940 0.560 0.320 0.160 0.070 0.020 0.000 0.000 0.000 0.00001660400 (r) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 1 9.44 7.30 5.86 4.70 3.69 2.71 -- -- -- -- -- -- --01660400 (w) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 1 6.25 3.54 2.28 1.52 1.02 0.667 -- -- -- -- -- -- --01660500 (p) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 1.55 1.03 0.730 0.530 0.370 0.260 0.170 0.090 0.040 0.020 0.010 0.000 0.000

01660500 (r) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 4.08 3.13 2.49 1.97 1.52 1.07 -- -- -- -- -- -- --

01660500 (w) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 1.73 1.17 0.844 0.619 0.437 0.307 -- -- -- -- -- -- --
Table 4. (4-day averaged, adjusted low flow) 57

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01661800 (p) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.84 1.34 1.01 0.780 0.580 0.430 0.290 0.170 0.060 0.000 0.000 0.000 0.00001661800 (r) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.37 0.954 0.691 0.509 0.372 0.250 -- -- -- -- -- -- --01661800 (w) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.77 1.28 0.966 0.745 0.554 0.410 -- -- -- -- -- -- --01661900 (p) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 5.28 3.32 2.43 1.89 1.51 1.22 0.990 0.780 0.580 0.460 0.360 0.320 0.28001661900 (r) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 5.96 4.42 3.46 2.75 2.17 1.67 1.23 0.828 0.439 0.226 -- -- --01661900 (w) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 5.30 3.35 2.46 1.91 1.53 1.23 0.995 0.781 0.577 0.456 -- -- --01662000 (p) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 42.4 28.7 20.9 15.6 11.6 8.46 5.89 3.73 1.86 0.990 0.460 0.260 0.15001662000 (r) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 74.3 59.0 49.0 41.3 34.7 28.7 23.2 17.6 11.5 7.53 -- -- --01662000 (w) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 43.7 29.9 22.0 16.6 12.4 9.14 6.43 4.14 2.10 1.14 -- -- --01662500 (p) Rush River at old Route 522 at Washington, Va. 14.6 23 5 0.870 0.640 0.490 0.370 0.270 0.180 0.090 0.000 0.000 0.000 0.000 0.000 0.00001662500 (r) Rush River at old Route 522 at Washington, Va. 14.6 23 5 4.10 3.01 2.34 1.84 1.44 1.10 0.799 0.526 0.271 0.134 -- -- --01662500 (w) Rush River at old Route 522 at Washington, Va. 14.6 23 5 0.977 0.714 0.545 0.413 0.302 0.204 0.107 0.012 0.005 0.002 -- -- --01662800 (p) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 6.37 4.19 3.00 2.20 1.62 1.16 0.790 0.490 0.220 0.090 0.000 0.000 0.00001662800 (r) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 7.75 5.79 4.56 3.64 2.89 2.25 1.68 1.14 0.616 0.325 -- -- --01662800 (w) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 6.43 4.26 3.06 2.26 1.67 1.20 0.818 0.510 0.230 0.096 -- -- --01663000 (p) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 53.2 33.4 23.3 16.8 12.2 8.74 6.01 3.79 1.92 1.06 0.520 0.310 0.19001663000 (r) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 50.9 40.0 33.0 27.5 22.9 18.8 15.0 11.1 7.03 4.45 -- -- --01663000 (w) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 53.1 33.7 23.7 17.2 12.6 9.10 6.31 4.03 2.06 1.15 -- -- --01663500 (p) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 89.1 58.7 42.4 31.6 23.6 17.5 12.4 8.14 4.36 2.51 1.30 0.810 0.52001663500 (r) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 114 91.2 76.6 65.2 55.3 46.4 38.0 29.3 19.8 13.6 -- -- --01663500 (w) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 90.1 60.0 43.7 32.8 24.7 18.4 13.2 8.75 4.73 2.76 -- -- --01664000 (p) Rappahannock River at Route 29 (Alternate) at 

Remington, Va. 

619 64 0 164 106 76.9 57.7 43.8 33.0 24.1 16.5 9.56 5.98 3.45 2.36 1.65

01664000 (r) Rappahannock River at Route 29 (Alternate) at 

Remington, Va. 

619 64 0 270 222 190 166 144 123 104 83.8 60.8 45.3 -- -- --

01664000 (w) Rappahannock River at Route 29 (Alternate) at 

Remington, Va. 

619 64 0 168 110 80.7 61.2 46.9 35.6 26.3 18.3 10.7 6.79 -- -- --

01664500 (p) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 175 142 115 91.7 71.5 53.4 37.2 22.7 9.95 4.41 1.51 0.670 0.300

01664500 (r) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 281 231 198 173 150 129 109 87.8 64.0 47.8 -- -- --

01664500 (w) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 180 145 118 94.9 74.4 56.0 39.5 24.7 11.3 5.46 -- -- --

01665000 (p) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 3.95 3.36 2.89 2.49 2.11 1.76 1.40 1.04 0.640 0.400 0.220 0.140 0.09001665000 (r) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 4.57 3.37 2.62 2.07 1.62 1.24 0.908 0.601 0.312 0.156 -- -- --01665000 (w) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 3.97 3.36 2.88 2.48 2.10 1.75 1.39 1.03 0.634 0.396 -- -- --01665500 (p) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 38.5 28.3 22.2 17.7 14.1 11.1 8.47 6.02 3.60 2.27 1.29 0.870 0.59001665500 (r) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 41.2 32.2 26.4 21.9 18.1 14.8 11.7 8.59 5.34 3.31 -- -- --01665500 (w) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 38.6 28.5 22.3 17.8 14.2 11.2 8.55 6.08 3.63 2.29 -- -- --01666500 (p) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 76.3 57.1 45.3 36.6 29.6 23.6 18.3 13.3 8.18 5.30 3.13 2.15 1.50

01666500 (r) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 31.5 23.1 -- -- -- -- -- -- -- -- -- -- --

01666500 (w) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 74.8 56.1 -- -- -- -- -- -- -- -- -- -- --

01667000 (p) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 92.4 66.2 54.3 47.0 41.9 38.0 34.8 32.1 29.6 28.4 27.6 27.4 27.201667000 (r) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 94.6 72.5 -- -- -- -- -- -- -- -- -- -- --01667000 (w) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 92.5 66.4 -- -- -- -- -- -- -- -- -- -- --
58 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01667500 (p) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 161 127 103 83.8 67.6 53.2 40.0 27.6 15.3 8.75 4.32 2.56 1.5401667500 (r) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 101 77.2 -- -- -- -- -- -- -- -- -- -- --01667500 (w) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 159 125 -- -- -- -- -- -- -- -- -- -- --01667870 (p) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01667870 (r) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 4.99 3.39 2.44 1.79 1.29 0.853 -- -- -- -- -- -- --01667870 (w) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01668000 (p) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 403 321 263 216 176 140 106 74.2 42.0 24.5 12.4 7.45 4.53

01668000 (r) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 178 114 80.1 58.0 40.8 25.8 -- -- -- -- -- -- --

01668000 (w) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 396 315 258 212 172 137 -- -- -- -- -- -- --

01668500 (p) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 4 7.96 4.92 3.35 2.35 1.64 1.11 0.690 0.360 0.090 0.000 0.000 0.000 0.00001668500 (r) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 4 7.51 5.07 3.63 2.66 1.92 1.26 -- -- -- -- -- -- --01668500 (w) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 4 7.88 4.94 3.40 2.40 1.68 1.13 -- -- -- -- -- -- --01668800 (p) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 6.46 4.63 3.59 2.86 2.29 1.82 1.41 1.03 0.650 0.440 0.270 0.190 0.14001668800 (r) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 2.86 1.96 1.41 1.04 0.754 0.501 -- -- -- -- -- -- --01668800 (w) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 6.03 4.32 3.35 2.67 2.14 1.71 -- -- -- -- -- -- --01669000 (p) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 1 8.16 7.10 5.99 4.87 3.80 2.77 1.82 0.980 0.300 0.070 0.000 0.000 0.000

01669000 (r) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 1 4.85 3.30 2.37 1.74 1.26 0.830 -- -- -- -- -- -- --

01669000 (w) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 1 7.52 6.39 5.34 4.34 3.39 2.49 -- -- -- -- -- -- --

01669500 (p) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 17.6 9.75 6.29 4.27 2.94 1.99 1.27 0.700 0.180 0.000 0.000 0.000 0.00001669500 (r) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 13.2 8.82 6.31 4.62 3.31 2.16 -- -- -- -- -- -- --01669500 (w) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 16.8 9.59 6.29 4.32 2.99 2.01 -- -- -- -- -- -- --01669520 (p) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 31.7 14.4 7.68 4.34 2.46 1.34 0.660 0.270 0.060 0.010 0.000 0.000 0.00001669520 (r) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 16.3 10.9 7.75 5.67 4.06 2.64 -- -- -- -- -- -- --01669520 (w) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 24.7 12.8 7.71 4.90 3.10 1.82 -- -- -- -- -- -- --01670000 (p) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 4 1.24 0.980 0.770 0.590 0.430 0.290 0.170 0.070 0.000 0.000 0.000 0.000 0.00001670000 (r) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 4 1.44 1.00 0.725 0.534 0.390 0.261 -- -- -- -- -- -- --01670000 (w) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 4 1.27 0.983 0.763 0.582 0.424 0.286 -- -- -- -- -- -- --01670180 (p) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670180 (r) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670180 (w) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670300 (p) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 0.780 0.470 0.330 0.240 0.180 0.140 0.100 0.070 0.050 0.030 0.020 0.020 0.01001670300 (r) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 1.95 1.48 1.17 0.914 0.692 0.475 -- -- -- -- -- -- --01670300 (w) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 0.835 0.515 0.366 0.267 0.200 0.153 -- -- -- -- -- -- --01670400 (p) North Anna River at Route 601 near Partlow, Va. 342 16 0 46.9 45.0 43.8 42.8 42.0 41.2 40.5 39.7 38.7 38.0 37.3 36.9 36.601670400 (r) North Anna River at Route 601 near Partlow, Va. 342 16 0 67.0 52.8 43.3 35.9 29.4 23.4 -- -- -- -- -- -- --01670400 (w) North Anna River at Route 601 near Partlow, Va. 342 16 0 47.5 45.2 43.7 42.6 41.7 40.8 -- -- -- -- -- -- --01671000 (p) North Anna River near Doswell, Va. 440 56 0 85.0 69.0 57.3 47.6 39.0 31.3 24.0 16.9 9.68 5.68 2.88 1.74 1.0501671000 (r) North Anna River near Doswell, Va. 440 56 0 56.5 36.8 26.1 19.0 13.5 8.64 -- -- -- -- -- -- --01671000 (w) North Anna River near Doswell, Va. 440 56 0 81.6 65.3 53.8 44.6 36.5 29.3 -- -- -- -- -- -- --
Table 4. (4-day averaged, adjusted low flow) 59

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

01671020 (p) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 66.2 60.8 57.0 53.9 51.1 48.5 45.7 42.6 38.5 35.4 32.0 29.9 28.1

01671020 (r) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 86.8 68.5 56.4 47.0 38.7 31.1 -- -- -- -- -- -- --

01671020 (w) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 66.8 61.0 57.0 53.8 50.8 48.0 -- -- -- -- -- -- --

01671100 (p) Little River at Route 685 near Doswell, Va. 107 43 0 14.3 8.86 6.11 4.37 3.13 2.21 1.50 0.930 0.450 0.240 0.110 0.070 0.04001671100 (r) Little River at Route 685 near Doswell, Va. 107 43 0 16.0 10.7 7.63 5.58 3.99 2.60 -- -- -- -- -- -- --01671100 (w) Little River at Route 685 near Doswell, Va. 107 43 0 14.6 9.17 6.36 4.56 3.26 2.26 -- -- -- -- -- -- --01671500 (p) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 11 0.640 0.430 0.310 0.230 0.160 0.080 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01671500 (r) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 11 1.57 1.19 0.937 0.731 0.550 0.375 -- -- -- -- -- -- --

01671500 (w) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 11 0.674 0.456 0.331 0.246 0.172 0.089 -- -- -- -- -- -- --

01672000 (p) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672000 (r) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672000 (w) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672500 (p) South Anna River at Route 54 near Ashland, Va. 395 68 0 74.5 56.5 45.5 37.3 30.7 25.0 19.8 14.8 9.66 6.59 4.16 3.01 2.2001672500 (r) South Anna River at Route 54 near Ashland, Va. 395 68 0 75.9 59.8 49.2 40.8 33.5 26.9 -- -- -- -- -- -- --01672500 (w) South Anna River at Route 54 near Ashland, Va. 395 68 0 74.5 56.6 45.6 37.4 30.8 25.0 -- -- -- -- -- -- --01673000 (p) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 195 156 130 111 95.1 80.7 67.2 53.6 38.4 28.6 20.1 15.7 12.401673000 (r) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 125 80.6 56.9 41.3 29.1 18.5 -- -- -- -- -- -- --01673000 (w) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 188 148 123 105 89.5 76.1 -- -- -- -- -- -- --01673500 (p) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 1 0.630 0.410 0.300 0.230 0.180 0.140 0.100 0.070 0.040 0.020 0.000 0.000 0.00001673500 (r) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 1 1.19 0.830 0.601 0.444 0.324 0.218 -- -- -- -- -- -- --01673500 (w) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 1 0.702 0.462 0.335 0.254 0.195 0.147 -- -- -- -- -- -- --01673550 (p) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 9.59 6.66 4.90 3.65 2.69 1.93 1.29 0.760 0.300 0.080 0.000 0.000 0.00001673550 (r) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 4.48 3.05 2.19 1.61 1.16 0.769 -- -- -- -- -- -- --01673550 (w) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 8.77 6.10 4.50 3.36 2.48 1.79 -- -- -- -- -- -- --01673638 (p) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 6.54 4.06 2.59 1.60 0.930 0.470 0.180 0.030 0.000 0.000 0.000 0.000 0.00001673638 (r) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 1.74 1.20 0.869 0.640 0.466 0.312 -- -- -- -- -- -- --01673638 (w) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 4.80 3.05 2.00 1.28 0.784 0.425 -- -- -- -- -- -- --01673800 (p) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 6.74 3.70 2.37 1.60 1.10 0.740 0.490 0.290 0.130 0.060 0.000 0.000 0.00001673800 (r) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 18.7 14.6 11.8 9.57 7.61 5.75 -- -- -- -- -- -- --01673800 (w) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 7.57 4.42 2.96 2.08 1.47 1.02 -- -- -- -- -- -- --01674000 (p) Mattaponi River above Route 605 near Bowling 

Green, Va. 

256 63 3 25.3 17.2 12.1 8.41 5.68 3.62 2.06 0.920 0.190 0.000 0.000 0.000 0.000

01674000 (r) Mattaponi River above Route 605 near Bowling 

Green, Va. 

256 63 3 34.9 22.9 16.3 11.9 8.45 5.45 -- -- -- -- -- -- --

01674000 (w) Mattaponi River above Route 605 near Bowling 

Green, Va. 

256 63 3 27.7 18.6 13.0 9.19 6.28 3.97 -- -- -- -- -- -- --

01674500 (p) Mattaponi River near Beulahville, Va. 602 62 0 111 87.2 69.8 55.6 43.6 33.0 23.6 15.1 7.28 3.62 1.47 0.750 0.38001674500 (r) Mattaponi River near Beulahville, Va. 602 62 0 74.6 48.4 34.3 24.9 17.6 11.3 -- -- -- -- -- -- --01674500 (w) Mattaponi River near Beulahville, Va. 602 62 0 106 81.8 65.0 51.7 40.4 30.7 -- -- -- -- -- -- --01677000 (p) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 2.42 1.59 1.16 0.880 0.670 0.500 0.360 0.240 0.100 0.000 0.000 0.000 0.00001677000 (r) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 1.29 0.895 0.648 0.478 0.349 0.234 -- -- -- -- -- -- --01677000 (w) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 2.27 1.50 1.10 0.834 0.635 0.475 -- -- -- -- -- -- --
60 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 4-day averaged, adjusted low flow (ft3/s) 02011400 (p) Jackson River along Route 603 near Bacova, Va. 157 31 0 38.0 32.5 29.1 26.6 24.4 22.5 20.7 18.8 16.5 14.9 13.3 12.4 11.6 02011400 (r) Jackson River along Route 603 near Bacova, Va. 157 31 0 36.7 30.6 26.8 23.9 21.5 19.2 17.1 14.8 12.1 10.2 8.32 7.22 6.38 02011400 (w) Jackson River along Route 603 near Bacova, Va. 157 31 0 38.0 32.4 29.1 26.5 24.4 22.5 20.6 18.7 16.4 14.8 13.2 12.3 11.5 02011460 (p) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 8.15 6.21 5.13 4.37 3.77 3.27 2.80 2.35 1.86 1.54 1.25 1.09 0.970 02011460 (r) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 13.3 11.0 9.50 8.38 7.42 6.57 5.76 4.89 3.88 3.19 2.53 2.14 1.86 02011460 (w) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 8.27 6.32 5.23 4.46 3.85 3.34 2.87 2.41 1.90 1.57 1.27 1.11 0.986 02011470 (p) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 14.3 14.3 14.1 13.8 13.2 12.4 11.2 9.56 6.92 4.78 2.76 1.76 1.09 02011470 (r) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 16.8 13.9 12.0 10.6 9.46 8.40 7.38 6.29 5.03 4.16 3.32 2.83 2.47 02011470 (w) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 14.4 14.3 14.1 13.7 13.1 12.3 11.2 9.49 6.88 4.77 2.77 1.78 1.11 02011480 (p) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 11.6 8.54 6.88 5.74 4.86 4.13 3.47 2.85 2.18 1.76 1.39 1.19 1.04 02011480 (r) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 19.9 16.5 14.3 12.7 11.3 10.1 8.86 7.58 6.08 5.05 4.05 3.46 3.03 02011480 (w) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 11.8 8.73 7.06 5.91 5.01 4.27 3.59 2.96 2.26 1.83 1.44 1.23 1.08 02011490 (p) Little Back Creek near Sunrise, Va. 4.9 21 0 2.95 2.71 2.54 2.39 2.26 2.13 1.99 1.83 1.62 1.45 1.27 1.16 1.07 02011490 (r) Little Back Creek near Sunrise, Va. 4.9 21 0 0.904 0.715 0.599 0.512 0.440 0.377 0.317 0.257 0.190 0.146 0.107 0.084 0.070

02011490 (w) Little Back Creek near Sunrise, Va. 4.9 21 0 2.91 2.67 2.50 2.35 2.22 2.09 1.96 1.80 1.59 1.43 1.25 1.14 1.0502011500 (p) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 22.4 18.0 15.1 12.9 11.0 9.34 7.76 6.17 4.39 3.24 2.25 1.74 1.3602011500 (r) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 31.0 25.8 22.6 20.1 18.0 16.1 14.3 12.3 9.98 8.39 6.82 5.89 5.1902011500 (w) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 22.7 18.2 15.3 13.0 11.2 9.50 7.91 6.31 4.51 3.35 2.34 1.82 1.4302011800 (p) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 187 170 157 145 133 121 109 94.4 75.5 61.2 46.9 38.6 31.9

02011800 (r) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 85.0 71.9 63.7 57.3 51.9 47.0 42.3 37.1 31.0 26.7 22.4 19.8 17.8

02011800 (w) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 185 168 155 143 131 120 107 93.3 74.6 60.5 46.5 38.3 31.6

02011950 (p) Johnson Spring near Hot Springs, Va. -- 6 0 0.580 0.530 0.510 0.480 0.470 0.450 0.430 0.410 0.380 0.360 0.340 0.330 0.31002011950 (r) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02011950 (w) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02012000 (p) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 8.71 7.69 7.12 6.73 6.42 6.16 5.93 5.72 5.49 5.36 5.27 5.22 5.19

02012000 (r) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 2.19 1.75 1.48 1.28 1.11 0.963 0.821 0.675 0.512 0.402 0.301 0.244 0.206

02012000 (w) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 8.57 7.57 7.00 6.62 6.31 6.06 5.83 5.62 5.40 5.27 5.19 5.14 5.11

02012500 (p) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 112 98.4 90.5 84.6 79.8 75.5 71.4 67.2 62.3 58.9 55.7 53.9 52.402012500 (r) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 102 86.7 77.0 69.4 62.9 57.1 51.6 45.4 38.1 33.0 27.8 24.7 22.202012500 (w) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 111 98.2 90.2 84.3 79.4 75.1 71.0 66.8 61.8 58.4 55.2 53.4 51.902013000 (p) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 22.9 19.7 17.8 16.4 15.1 14.0 13.0 11.9 10.5 9.56 8.63 8.08 7.6202013000 (r) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 37.9 31.7 27.8 24.8 22.2 19.9 17.7 15.3 12.5 10.6 8.66 7.51 6.6502013000 (w) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 23.2 20.0 18.0 16.5 15.3 14.1 13.1 11.9 10.5 9.58 8.63 8.07 7.6002013100 (p) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 253 234 219 204 190 175 159 139 113 93.1 72.4 60.0 49.902013100 (r) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 157 134 119 108 98.6 90.0 81.8 72.6 61.5 53.8 46.0 41.3 37.502013100 (w) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 251 232 216 202 188 173 157 138 112 92.4 71.9 59.7 49.702014000 (p) Potts Creek at Route 18 near Covington, Va. 153 68 0 35.5 30.5 27.6 25.4 23.7 22.1 20.6 19.1 17.3 16.1 14.9 14.2 13.702014000 (r) Potts Creek at Route 18 near Covington, Va. 153 68 0 35.7 29.8 26.1 23.3 20.8 18.7 16.6 14.4 11.7 9.86 8.06 6.98 6.1702014000 (w) Potts Creek at Route 18 near Covington, Va. 153 68 0 35.5 30.5 27.6 25.4 23.6 22.0 20.5 19.0 17.2 15.9 14.8 14.1 13.502014500 (p) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 3.36 2.69 2.33 2.08 1.89 1.73 1.59 1.45 1.30 1.21 1.13 1.08 1.0502014500 (r) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 2.42 1.94 1.64 1.42 1.24 1.07 0.915 0.754 0.572 0.451 0.339 0.275 0.23202014500 (w) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 3.34 2.67 2.32 2.07 1.88 1.72 1.58 1.44 1.29 1.20 1.12 1.07 1.04
Table 4. (4-day averaged, adjusted low flow) 61

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02015700 (p) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 43.7 38.3 35.1 32.9 31.1 29.6 28.1 26.7 25.2 24.2 23.3 22.9 22.502015700 (r) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 25.1 20.8 18.2 16.1 14.4 12.9 11.4 9.76 7.88 6.59 5.32 4.57 4.0202015700 (w) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 43.3 37.9 34.8 32.5 30.8 29.2 27.8 26.4 24.9 23.9 23.0 22.5 22.202016000 (p) Cowpasture River below Route 633 near Clifton 

Forge, Va. 

461 81 0 105 91.8 84.0 78.1 73.1 68.6 64.3 59.9 54.5 50.7 47.0 44.9 43.1

02016000 (r) Cowpasture River below Route 633 near Clifton 

Forge, Va. 

461 81 0 116 98.5 87.5 79.1 71.8 65.3 59.1 52.1 43.8 38.1 32.2 28.7 25.9

02016000 (w) Cowpasture River below Route 633 near Clifton 

Forge, Va. 

461 81 0 105 92.0 84.0 78.1 73.1 68.6 64.2 59.7 54.3 50.5 46.8 44.6 42.8

02016500 (p) James River below Route 220 at Lick Run, Va. 1,371 81 0 399 345 311 286 266 247 229 210 188 172 156 147 14002016500 (r) James River below Route 220 at Lick Run, Va. 1,371 81 0 371 321 289 265 244 225 207 186 161 144 127 116 10702016500 (w) James River below Route 220 at Lick Run, Va. 1,371 81 0 399 344 311 286 265 246 228 209 187 171 156 147 13902017000 (p) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 5.23 4.29 3.73 3.32 2.99 2.69 2.42 2.13 1.81 1.58 1.37 1.25 1.1502017000 (r) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 2.63 2.11 1.79 1.55 1.35 1.17 1.00 0.826 0.628 0.496 0.374 0.304 0.25702017000 (w) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 5.17 4.24 3.69 3.28 2.95 2.66 2.39 2.10 1.79 1.56 1.35 1.23 1.1402017500 (p) Johns Creek at Route 615 at New Castle, Va. 105 80 0 16.6 14.1 12.7 11.6 10.7 9.90 9.15 8.40 7.51 6.89 6.31 5.97 5.6902017500 (r) Johns Creek at Route 615 at New Castle, Va. 105 80 0 23.9 19.8 17.3 15.3 13.7 12.2 10.8 9.24 7.45 6.22 5.02 4.31 3.7802017500 (w) Johns Creek at Route 615 at New Castle, Va. 105 80 0 16.8 14.2 12.7 11.6 10.7 9.95 9.18 8.42 7.51 6.88 6.29 5.94 5.6602018000 (p) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 61.8 54.0 49.1 45.3 42.2 39.4 36.6 33.7 30.1 27.6 25.1 23.7 22.402018000 (r) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 80.8 68.3 60.4 54.4 49.2 44.5 40.1 35.1 29.2 25.2 21.1 18.6 16.702018000 (w) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 62.2 54.3 49.3 45.5 42.3 39.5 36.6 33.7 30.1 27.6 25.1 23.6 22.302018500 (p) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 6.12 5.34 4.72 4.18 3.67 3.17 2.66 2.11 1.46 1.03 0.650 0.470 0.34002018500 (r) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 7.22 5.89 5.06 4.43 3.90 3.43 2.98 2.50 1.95 1.58 1.23 1.03 0.88202018500 (w) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 6.15 5.35 4.73 4.19 3.68 3.18 2.67 2.12 1.47 1.04 0.661 0.480 0.35002019000 (p) Catawba Creek near Fincastle, Va. 104 8 0 21.7 18.1 15.6 13.7 11.9 10.3 8.76 7.12 5.20 3.91 2.76 2.15 1.6902019000 (r) Catawba Creek near Fincastle, Va. 104 8 0 23.6 19.6 17.1 15.2 13.5 12.1 10.7 9.14 7.37 6.15 4.96 4.25 3.7302019000 (w) Catawba Creek near Fincastle, Va. 104 8 0 21.7 18.1 15.7 13.7 12.0 10.4 8.80 7.16 5.25 3.95 2.80 2.19 1.7302019500 (p) James River at Route 11 at Buchanan, Va. 2,073 96 0 585 513 467 431 401 373 345 316 280 254 228 212 19902019500 (r) James River at Route 11 at Buchanan, Va. 2,073 96 0 577 503 455 419 387 359 333 302 265 240 213 198 18302019500 (w) James River at Route 11 at Buchanan, Va. 2,073 96 0 585 513 467 431 401 372 345 316 280 254 228 212 19902020500 (p) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 12.5 9.24 7.33 5.94 4.83 3.88 3.04 2.25 1.44 0.970 0.600 0.430 0.320

02020500 (r) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 32.7 27.3 23.9 21.3 19.0 17.0 15.1 13.0 10.6 8.93 7.27 6.29 5.55

02020500 (w) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 13.0 9.74 7.79 6.36 5.22 4.23 3.36 2.53 1.67 1.16 0.752 0.558 0.429

02021000 (p) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 19.5 16.8 15.1 13.7 12.6 11.5 10.5 9.33 7.97 6.98 6.01 5.43 4.9402021000 (r) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 43.9 36.8 32.3 28.9 25.9 23.3 20.8 18.0 14.8 12.5 10.3 8.97 7.9502021000 (w) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 20.0 17.2 15.4 14.0 12.9 11.7 10.7 9.50 8.10 7.08 6.09 5.49 4.9902021500 (p) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 41.6 34.6 30.1 26.8 23.9 21.3 18.8 16.2 13.1 11.0 8.94 7.78 6.8402021500 (r) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 80.8 68.3 60.4 54.4 49.2 44.5 40.1 35.1 29.2 25.2 21.1 18.6 16.702021500 (w) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 42.5 35.3 30.8 27.4 24.4 21.8 19.2 16.6 13.4 11.2 9.16 7.97 7.0102022500 (p) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 9.71 8.60 7.87 7.29 6.79 6.32 5.85 5.34 4.70 4.23 3.75 3.46 3.2102022500 (r) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 7.40 6.04 5.19 4.55 4.00 3.52 3.06 2.57 2.01 1.63 1.27 1.06 0.90902022500 (w) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 9.66 8.55 7.81 7.23 6.73 6.26 5.79 5.29 4.65 4.18 3.71 3.42 3.17
62 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02023000 (p) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 99.3 85.4 76.8 70.1 64.5 59.3 54.3 49.0 42.7 38.1 33.5 30.9 28.6

02023000 (r) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 121 103 91.7 82.9 75.3 68.5 62.0 54.8 46.1 40.1 34.0 30.4 27.4

02023000 (w) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 99.8 85.8 77.1 70.4 64.7 59.5 54.5 49.2 42.7 38.1 33.5 30.9 28.6

02023500 (p) South River at Route 631 near Riverside, Va. 112 10 0 26.2 23.3 21.4 19.9 18.6 17.4 16.2 14.9 13.3 12.1 10.9 10.2 9.5202023500 (r) South River at Route 631 near Riverside, Va. 112 10 0 40.0 31.2 25.6 21.2 17.6 14.3 11.3 8.29 5.14 3.18 -- -- --02023500 (w) South River at Route 631 near Riverside, Va. 112 10 0 26.5 23.4 21.5 19.9 18.6 17.3 16.1 14.8 13.2 12.0 -- -- --02024000 (p) Maury River near Buena Vista, Va. 647 67 0 147 125 111 101 92.1 84.1 76.2 68.0 58.2 51.1 44.3 40.2 36.902024000 (r) Maury River near Buena Vista, Va. 647 67 0 166 142 127 115 105 95.8 87.2 77.4 65.7 57.6 49.4 44.4 40.302024000 (w) Maury River near Buena Vista, Va. 647 67 0 148 126 112 101 92.4 84.3 76.5 68.2 58.3 51.2 44.4 40.3 36.902024500 (p) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 232 192 170 154 142 131 121 111 100 93.3 86.9 83.4 80.602024500 (r) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 379 314 271 238 208 180 154 126 94.0 72.4 -- -- --02024500 (w) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 236 195 172 156 143 132 122 112 100 93.1 -- -- --02024915 (p) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 15.8 11.9 9.79 8.30 7.13 6.14 5.25 4.38 3.43 2.82 2.28 1.98 1.7502024915 (r) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 8.19 6.12 4.83 3.86 3.07 2.39 1.79 1.22 0.662 0.351 -- -- --02024915 (w) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 15.6 11.8 9.68 8.20 7.04 6.06 5.19 4.32 3.39 2.79 -- -- --02025000 (p) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 21.6 16.0 12.9 10.7 8.91 7.43 6.10 4.83 3.47 2.63 1.91 1.54 1.2602025000 (r) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 33.1 25.7 21.0 17.3 14.3 11.6 9.07 6.60 4.03 2.45 -- -- --02025000 (w) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 21.9 16.3 13.1 10.8 9.03 7.52 6.16 4.86 3.48 2.63 -- -- --02025500 (p) James River at Holcomb(s) Rock, Va. 3,256 79 0 925 801 722 661 609 561 515 465 404 360 317 291 26902025500 (r) James River at Holcomb(s) Rock, Va. 3,256 79 0 934 820 747 691 642 599 559 512 455 416 376 353 33002025500 (w) James River at Holcomb(s) Rock, Va. 3,256 79 0 926 801 723 662 610 562 515 466 405 361 318 292 27002026000 (p) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,163 997 891 808 737 671 607 539 456 396 337 302 27302026000 (r) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,055 928 847 784 730 682 638 585 521 479 434 409 38202026000 (w) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,160 995 890 807 737 672 608 540 457 397 339 304 27502026500 (p) Tye River at Roseland, Va. 69 9 0 34.9 26.5 21.1 17.1 13.8 11.0 8.40 5.99 3.57 2.22 1.24 0.820 0.54002026500 (r) Tye River at Roseland, Va. 69 9 0 23.3 17.9 14.5 11.9 9.68 7.76 6.02 4.30 2.55 1.50 -- -- --02026500 (w) Tye River at Roseland, Va. 69 9 0 34.5 26.2 21.0 17.0 13.7 10.9 8.35 5.95 3.55 2.21 -- -- --02027000 (p) Tye River at Route 158 near Lovingston, Va. 93 68 0 40.5 32.1 26.2 21.5 17.5 14.0 10.7 7.53 4.34 2.59 1.35 0.830 0.52002027000 (r) Tye River at Route 158 near Lovingston, Va. 93 68 0 32.5 25.2 20.6 17.0 14.0 11.3 8.87 6.45 3.93 2.38 -- -- --02027000 (w) Tye River at Route 158 near Lovingston, Va. 93 68 0 40.2 31.9 26.0 21.4 17.4 13.9 10.6 7.51 4.33 2.59 -- -- --02027500 (p) Piney River at Route 151 at Piney River, Va. 47.7 57 0 19.4 14.4 11.5 9.39 7.71 6.28 5.00 3.78 2.52 1.76 1.16 0.860 0.65002027500 (r) Piney River at Route 151 at Piney River, Va. 47.7 57 0 15.4 11.7 9.39 7.62 6.15 4.87 3.72 2.61 1.50 0.844 -- -- --02027500 (w) Piney River at Route 151 at Piney River, Va. 47.7 57 0 19.3 14.4 11.4 9.34 7.67 6.25 4.97 3.76 2.50 1.75 -- -- --02027800 (p) Buffalo River at Route 657 near Tye River, Va. 148 34 0 65.8 50.9 41.4 34.3 28.3 23.1 18.3 13.7 8.83 5.94 3.67 2.60 1.8602027800 (r) Buffalo River at Route 657 near Tye River, Va. 148 34 0 54.6 43.0 35.5 29.7 24.7 20.3 16.2 12.1 7.69 4.90 -- -- --02027800 (w) Buffalo River at Route 657 near Tye River, Va. 148 34 0 65.5 50.7 41.3 34.1 28.2 23.0 18.3 13.7 8.81 5.92 -- -- --02028000 (p) Tye (Buffalo) River near Norwood, Va. 355 19 0 150 117 97.6 83.6 72.3 62.4 53.4 44.3 34.2 27.6 21.6 18.4 15.802028000 (r) Tye (Buffalo) River near Norwood, Va. 355 19 0 145 117 99.1 84.9 72.5 61.1 50.6 39.5 27.2 19.1 -- -- --02028000 (w) Tye (Buffalo) River near Norwood, Va. 355 19 0 150 117 97.6 83.6 72.3 62.4 53.3 44.3 34.1 27.5 -- -- --02028500 (p) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 32.7 27.1 22.5 18.4 14.7 11.3 8.10 5.15 2.42 1.14 0.430 0.200 0.09002028500 (r) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 33.2 25.8 21.0 17.4 14.3 11.6 9.10 6.62 4.04 2.45 -- -- --02028500 (w) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 32.8 27.1 22.4 18.3 14.7 11.3 8.13 5.19 2.46 1.17 -- -- --02029000 (p) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,458 1,222 1,076 965 871 786 705 620 519 447 379 339 30602029000 (r) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,585 1,348 -- -- -- -- -- -- -- -- -- -- --02029000 (w) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,463 1,227 -- -- -- -- -- -- -- -- -- -- --
Table 4. (4-day averaged, adjusted low flow) 63

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02029500 (p) Hardware River at Route 618 near Scottsville, Va. 104 11 0 52.2 38.2 29.4 23.0 17.8 13.6 9.86 6.56 3.50 1.96 0.960 0.570 0.34002029500 (r) Hardware River at Route 618 near Scottsville, Va. 104 11 0 36.8 28.7 23.4 19.4 16.0 13.0 10.3 7.50 4.62 2.83 -- -- --02029500 (w) Hardware River at Route 618 near Scottsville, Va. 104 11 0 51.6 37.8 29.2 22.8 17.8 13.5 9.87 6.58 3.52 1.98 -- -- --02030000 (p) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 32.8 32.6 31.7 29.6 26.3 21.9 16.4 10.1 3.81 1.22 0.230 0.060 0.010

02030000 (r) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 41.6 32.5 26.6 22.2 18.3 14.9 11.8 8.69 5.41 3.36 -- -- --

02030000 (w) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 33.2 32.6 31.5 29.3 26.0 21.6 16.3 10.1 3.86 1.28 -- -- --

02030500 (p) Slate River above Route 676 near Arvonia, Va. 226 67 0 70.8 56.1 46.1 38.3 31.6 25.6 20.1 14.7 9.07 5.80 3.32 2.21 1.4902030500 (r) Slate River above Route 676 near Arvonia, Va. 226 67 0 46.9 36.8 30.1 24.8 20.2 15.8 -- -- -- -- -- -- --02030500 (w) Slate River above Route 676 near Arvonia, Va. 226 67 0 69.9 55.4 45.5 37.8 31.2 25.3 -- -- -- -- -- -- --02031000 (p) Mechums River at Route 614 near White Hall (Ivy), 

Va. 

95.3 36 1 34.4 26.7 21.5 17.4 14.0 11.0 8.24 5.60 2.88 1.26 0.000 0.000 0.000

02031000 (r) Mechums River at Route 614 near White Hall (Ivy), 

Va. 

95.3 36 1 33.4 25.9 21.2 17.5 14.4 11.7 9.16 6.66 4.07 2.47 -- -- --

02031000 (w) Mechums River at Route 614 near White Hall (Ivy), 

Va. 

95.3 36 1 34.3 26.6 21.5 17.4 14.0 11.0 8.26 5.62 2.90 1.28 -- -- --

02031500 (p) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 2 0.740 0.540 0.420 0.320 0.240 0.170 0.100 0.030 0.000 0.000 0.000 0.000 0.000

02031500 (r) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 2 3.05 2.22 1.71 1.34 1.04 0.785 0.566 0.368 0.185 0.089 -- -- --

02031500 (w) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 2 0.815 0.592 0.458 0.349 0.262 0.186 0.111 0.038 0.004 0.002 -- -- --

02032250 (p) Moormans River at Route 601 near Free Union, Va. 77 18 0 10.9 7.41 5.48 4.17 3.20 2.42 1.77 1.21 0.690 0.420 0.230 0.150 0.10002032250 (r) Moormans River at Route 601 near Free Union, Va. 77 18 0 26.3 20.3 16.5 13.5 11.1 8.91 6.94 4.99 2.99 1.78 -- -- --02032250 (w) Moormans River at Route 601 near Free Union, Va. 77 18 0 11.5 7.86 5.84 4.47 3.44 2.61 1.91 1.31 0.740 0.447 -- -- --02032400 (p) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 7.21 4.77 3.55 2.77 2.20 1.75 1.38 1.04 0.710 0.520 0.370 0.290 0.240

02032400 (r) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 10.7 8.08 6.42 5.16 4.13 3.24 2.44 1.69 0.938 0.510 -- -- --

02032400 (w) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 7.32 4.87 3.63 2.84 2.25 1.79 1.40 1.05 0.714 0.520 -- -- --

02032500 (p) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 38.2 24.2 17.4 13.0 9.94 7.57 5.64 3.98 2.45 1.63 1.02 0.750 0.56002032500 (r) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 82.9 66.0 55.0 46.5 39.1 32.5 26.4 20.0 13.2 8.76 -- -- --02032500 (w) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 39.8 25.6 18.6 14.1 10.8 8.28 6.19 4.39 2.68 1.77 -- -- --02032515 (p) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 53.7 38.6 30.3 24.6 20.2 16.5 13.3 10.3 7.14 5.26 3.70 2.92 2.3502032515 (r) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 102 81.7 68.4 58.1 49.2 41.1 33.6 25.8 17.3 11.7 -- -- --02032515 (w) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 55.1 39.8 31.3 25.4 20.9 17.1 13.7 10.6 7.31 5.36 -- -- --
64 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02032640 (p) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 27.4 18.4 13.3 9.76 7.13 5.08 3.43 2.08 0.960 0.480 0.200 0.110 0.06002032640 (r) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 38.4 29.9 24.5 20.3 16.8 13.6 10.8 7.89 4.88 3.01 -- -- --02032640 (w) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 28.0 19.0 13.8 10.2 7.52 5.41 3.69 2.28 1.07 0.547 -- -- --02032680 (p) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 60.3 45.5 36.4 29.7 24.3 19.7 15.5 11.5 7.38 4.98 3.09 2.21 1.60

02032680 (r) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 65.5 51.8 42.9 36.0 30.2 24.9 20.0 15.0 9.72 6.31 -- -- --

02032680 (w) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 60.5 45.6 36.6 29.9 24.4 19.8 15.6 11.6 7.42 5.00 -- -- --

02033500 (p) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 67.8 51.9 41.1 32.6 25.6 19.6 14.2 9.31 4.78 2.54 1.14 0.630 0.35002033500 (r) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 214 175 149 129 111 94.8 79.6 63.3 45.1 32.8 -- -- --02033500 (w) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 73.3 56.3 44.7 35.8 28.3 21.7 15.9 10.7 5.67 3.16 -- -- --02034000 (p) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 205 156 126 104 85.4 69.4 54.9 41.0 26.4 17.9 11.1 7.91 5.7202034000 (r) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 292 240 206 180 156 134 114 91.9 67.2 50.4 -- -- --02034000 (w) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 207 159 128 106 87.1 70.9 56.2 42.0 27.1 18.4 -- -- --02034500 (p) Willis River at Route 690 at Lakeside Village (Flanagan Mills), Va. 262 56 0 61.7 47.5 38.3 31.2 25.4 20.3 15.7 11.3 6.80 4.28 2.41 1.60 1.0702034500 (r) Willis River at Route 690 at Lakeside Village (Flanagan Mills), Va. 262 56 0 53.3 41.9 34.3 28.3 23.1 18.2 -- -- -- -- -- -- --02034500 (w) Willis River at Route 690 at Lakeside Village (Flanagan Mills), Va. 262 56 0 61.4 47.3 38.1 31.1 25.3 20.2 -- -- -- -- -- -- --02035000 (p) James River at Route 45 at Cartersville, Va. 6,252 108 0 1,973 1,646 1,439 1,280 1,146 1,023 904 781 633 530 432 376 33002035000 (r) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,309 1,992 -- -- -- -- -- -- -- -- -- -- --02035000 (w) James River at Route 45 at Cartersville, Va. 6,252 108 0 1,987 1,660 -- -- -- -- -- -- -- -- -- -- --02036500 (p) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 4.09 3.14 2.49 1.97 1.54 1.17 0.840 0.540 0.270 0.140 0.060 0.030 0.02002036500 (r) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 6.43 4.95 3.96 3.16 2.46 1.77 -- -- -- -- -- -- --02036500 (w) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 4.20 3.22 2.55 2.02 1.58 1.19 -- -- -- -- -- -- --02037500 (p) James River above Route 147 near Richmond, Va. 6,753 72 0 2,100 1,532 1,153 868 641 455 302 175 73.0 31.6 10.8 4.88 2.2102037500 (r) James River above Route 147 near Richmond, Va. 6,753 72 0 2,534 2,194 -- -- -- -- -- -- -- -- -- -- --02037500 (w) James River above Route 147 near Richmond, Va. 6,753 72 0 2,139 1,590 -- -- -- -- -- -- -- -- -- -- --02038000 (p) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 2.77 2.74 2.64 2.46 2.21 1.89 1.50 1.03 0.490 0.210 0.060 0.020 0.01002038000 (r) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 5.64 3.83 2.75 2.02 1.46 0.960 -- -- -- -- -- -- --02038000 (w) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 3.14 2.88 2.65 2.41 2.13 1.80 -- -- -- -- -- -- --02038500 (p) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 6.49 3.68 2.42 1.68 1.19 0.830 0.570 0.360 0.190 0.110 0.060 0.040 0.030

02038500 (r) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 8.63 5.81 4.16 3.05 2.19 1.44 -- -- -- -- -- -- --

02038500 (w) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 6.87 4.05 2.71 1.90 1.34 0.911 -- -- -- -- -- -- --
Table 4. (4-day averaged, adjusted low flow) 65

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02038850 (p) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 2.96 2.56 2.21 1.88 1.57 1.27 0.970 0.670 0.360 0.190 0.090 0.050 0.020

02038850 (r) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 2.81 2.15 1.70 1.34 1.02 0.711 -- -- -- -- -- -- --

02038850 (w) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 2.95 2.54 2.19 1.86 1.55 1.25 -- -- -- -- -- -- --

02039000 (p) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 23.3 22.2 20.7 18.8 16.7 14.2 11.5 8.32 4.64 2.50 1.05 0.530 0.26002039000 (r) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 17.0 13.3 10.7 8.68 6.90 5.19 -- -- -- -- -- -- --02039000 (w) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 23.1 21.9 20.3 18.5 16.4 13.9 -- -- -- -- -- -- --02039500 (p) Appomattox River at Route 45 at Farmville, Va. 302 79 0 66.2 65.1 64.9 63.6 60.4 54.9 46.4 34.1 17.4 7.66 2.16 0.740 0.23002039500 (r) Appomattox River at Route 45 at Farmville, Va. 302 79 0 60.2 47.4 38.9 32.1 26.3 20.8 -- -- -- -- -- -- --02039500 (w) Appomattox River at Route 45 at Farmville, Va. 302 79 0 65.9 64.4 63.9 62.4 59.3 53.8 -- -- -- -- -- -- --02040000 (p) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 182 153 132 113 96.2 80.2 64.5 48.3 30.4 19.5 11.1 7.27 4.7902040000 (r) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 128 101 83.8 70.2 58.3 47.7 -- -- -- -- -- -- --02040000 (w) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 180 151 130 112 95.1 79.2 -- -- -- -- -- -- --02041000 (p) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 25.8 21.5 17.4 13.6 10.2 7.08 4.44 2.28 0.710 0.220 0.040 0.010 0.00002041000 (r) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 34.5 27.0 22.0 18.0 14.6 11.3 -- -- -- -- -- -- --02041000 (w) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 26.5 22.0 17.8 13.9 10.5 7.39 -- -- -- -- -- -- --02041500 (p) Appomattox River near Petersburg, Va. 1,333 36 0 314 246 204 172 145 122 99.9 78.3 54.6 39.7 27.1 20.8 16.102041500 (r) Appomattox River near Petersburg, Va. 1,333 36 0 216 172 143 121 102 85.0 -- -- -- -- -- -- --02041500 (w) Appomattox River near Petersburg, Va. 1,333 36 0 311 244 202 170 144 121 -- -- -- -- -- -- --02041650 (p) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 255 196 160 134 114 95.6 79.1 63.1 45.5 34.4 24.8 19.9 16.102041650 (r) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 217 173 144 122 102 85.5 -- -- -- -- -- -- --02041650 (w) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 254 195 160 134 113 95.3 -- -- -- -- -- -- --02042500 (p) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 39.1 27.6 20.4 15.1 11.0 7.71 5.06 2.92 1.22 0.530 0.190 0.090 0.040

02042500 (r) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 34.3 22.5 16.0 11.7 8.31 5.36 -- -- -- -- -- -- --

02042500 (w) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 38.2 26.7 19.6 14.5 10.6 7.38 -- -- -- -- -- -- --

02044000 (p) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 2 3.62 2.35 1.66 1.20 0.870 0.610 0.400 0.230 0.080 0.000 0.000 0.000 0.00002044000 (r) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 2 10.3 7.96 6.40 5.14 4.04 2.98 -- -- -- -- -- -- --02044000 (w) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 2 4.00 2.65 1.90 1.39 1.02 0.718 -- -- -- -- -- -- --02044500 (p) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 81.1 58.0 43.7 33.3 25.2 18.5 13.0 8.19 4.00 2.06 0.900 0.490 0.27002044500 (r) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 62.8 49.4 40.5 33.6 27.4 21.8 -- -- -- -- -- -- --02044500 (w) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 80.1 57.5 43.5 33.3 25.3 18.7 -- -- -- -- -- -- --02045500 (p) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 115 81.6 62.6 49.4 39.1 30.7 23.4 16.8 10.3 6.72 4.03 2.82 2.0102045500 (r) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 71.9 46.7 33.1 24.0 17.0 10.9 -- -- -- -- -- -- --02045500 (w) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 110 77.4 59.3 46.6 36.9 28.9 -- -- -- -- -- -- --02046000 (p) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 10.1 6.86 4.89 3.51 2.49 1.70 1.08 0.600 0.230 0.100 0.030 0.010 0.01002046000 (r) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 25.9 20.2 16.4 13.4 10.7 8.21 -- -- -- -- -- -- --02046000 (w) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 11.3 7.84 5.70 4.18 3.02 2.11 -- -- -- -- -- -- --02047000 (p) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 199 137 105 83.5 67.7 55.1 44.2 34.3 24.2 18.3 13.4 10.9 9.0202047000 (r) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 162 104 73.3 53.2 37.4 23.6 -- -- -- -- -- -- --02047000 (w) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 195 133 101 80.5 64.9 52.4 -- -- -- -- -- -- --02047500 (p) Blackwater River at Route 617 near Dendron, Va. 290 61 24 13.3 5.41 2.62 1.27 0.520 0.050 0.000 0.000 0.000 0.000 0.000 0.000 0.00002047500 (r) Blackwater River at Route 617 near Dendron, Va. 290 61 24 39.0 25.6 18.2 13.2 9.41 6.06 -- -- -- -- -- -- --02047500 (w) Blackwater River at Route 617 near Dendron, Va. 290 61 24 19.8 10.3 6.27 3.97 2.43 1.20 -- -- -- -- -- -- --
66 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 4-day averaged, adjusted low flow (ft3/s) 02048000 (p) Blackwater River at Route 460 at Zuni, Va. 451 45 3 22.2 11.1 6.42 3.85 2.29 1.31 0.670 0.270 0.040 0.000 0.000 0.000 0.000 02048000 (r) Blackwater River at Route 460 at Zuni, Va. 451 45 3 57.7 37.6 26.7 19.4 13.8 8.82 -- -- -- -- -- -- -- 02048000 (w) Blackwater River at Route 460 at Zuni, Va. 451 45 3 34.4 20.0 13.0 8.70 5.71 3.34 -- -- -- -- -- -- -- 02049500 (p) Blackwater River near Franklin, Va. 613 60 0 34.4 16.7 9.93 6.36 4.19 2.76 1.77 1.05 0.510 0.280 0.140 0.090 0.060 02049500 (r) Blackwater River near Franklin, Va. 613 60 0 75.8 49.2 34.8 25.3 17.9 11.4 -- -- -- -- -- -- -- 02049500 (w) Blackwater River near Franklin, Va. 613 60 0 44.3 24.3 15.5 10.4 6.98 4.34 -- -- -- -- -- -- -- 02050500 (p) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 1.53 1.00 0.750 0.600 0.490 0.400 0.330 0.270 0.200 0.170 0.130 0.120 0.110 02050500 (r) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 2.95 2.26 1.79 1.41 1.08 0.752 -- -- -- -- -- -- -- 02050500 (w) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 1.58 1.04 0.785 0.626 0.508 0.411 -- -- -- -- -- -- -- 02051000 (p) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 1 5.11 4.53 3.90 3.24 2.59 1.95 1.33 0.760 0.260 0.070 0.000 0.000 0.000 02051000 (r) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 1 14.1 11.0 8.85 7.15 5.66 4.22 -- -- -- -- -- -- -- 02051000 (w) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 1 5.63 4.88 4.16 3.44 2.74 2.06 -- -- -- -- -- -- -- 02051500 (p) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 109 86.3 71.0 58.9 48.6 39.4 30.9 22.5 13.8 8.76 4.96 3.28 2.19 02051500 (r) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 101 80.0 66.0 55.1 45.5 36.9 -- -- -- -- -- -- --

02051500 (w) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 108 86.1 70.9 58.8 48.5 39.4 -- -- -- -- -- -- --02051600 (p) Great Creek at Route 763 (old Route 618) near 

Cochran, Va. 

30.8 27 0 5.86 4.30 3.33 2.62 2.05 1.57 1.16 0.780 0.430 0.250 0.130 0.080 0.050

02051600 (r) Great Creek at Route 763 (old Route 618) near 

Cochran, Va. 

30.8 27 0 8.46 6.53 5.24 4.20 3.28 2.40 -- -- -- -- -- -- --

02051600 (w) Great Creek at Route 763 (old Route 618) near 

Cochran, Va. 

30.8 27 0 5.98 4.40 3.41 2.68 2.10 1.60 -- -- -- -- -- -- --

02052000 (p) Meherrin River at Route 301 at Emporia, Va. 744 56 0 118 87.4 69.8 57.2 47.4 39.0 31.5 24.4 16.9 12.4 8.61 6.70 5.3102052000 (r) Meherrin River at Route 301 at Emporia, Va. 744 56 0 90.1 58.3 41.2 30.0 21.2 13.5 -- -- -- -- -- -- --02052000 (w) Meherrin River at Route 301 at Emporia, Va. 744 56 0 115 84.3 66.9 54.6 45.0 37.0 -- -- -- -- -- -- --02052500 (p) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 12 3.07 2.22 1.54 0.980 0.540 0.210 0.010 0.000 0.000 0.000 0.000 0.000 0.000

02052500 (r) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 12 10.8 7.25 5.19 3.80 2.73 1.78 -- -- -- -- -- -- --

02052500 (w) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 12 4.75 3.28 2.28 1.52 0.941 0.467 -- -- -- -- -- -- --

02053000 (p) Fountains (Fontaine) Creek at Route 639 near Emporia, Va. 95.9 9 0 16.5 11.6 8.62 6.52 4.90 3.60 2.51 1.59 0.780 0.410 0.180 0.100 0.06002053000 (r) Fountains (Fontaine) Creek at Route 639 near Emporia, Va. 95.9 9 0 14.5 9.71 6.94 5.07 3.63 2.37 -- -- -- -- -- -- --02053000 (w) Fountains (Fontaine) Creek at Route 639 near Emporia, Va. 95.9 9 0 16.2 11.3 8.38 6.32 4.74 3.46 -- -- -- -- -- -- --02053800 (p) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 37.7 32.0 28.3 25.4 22.8 20.4 18.0 15.5 12.4 10.3 8.20 7.00 6.04

02053800 (r) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 38.8 30.3 24.8 20.6 17.0 13.8 10.9 7.99 4.94 3.05 -- -- --

02053800 (w) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 37.7 32.0 28.2 25.2 22.7 20.3 17.9 15.4 12.3 10.2 -- -- --

02054500 (p) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 67.9 57.9 51.4 46.3 41.8 37.8 33.8 29.5 24.3 20.6 17.0 15.0 13.202054500 (r) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 61.3 51.6 45.5 40.8 36.8 33.2 29.8 26.0 21.5 18.3 15.2 13.4 11.902054500 (w) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 67.7 57.7 51.2 46.1 41.7 37.7 33.7 29.4 24.3 20.6 17.0 14.9 13.202054530 (p) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 88.7 74.2 64.6 57.2 50.7 44.8 39.1 33.0 25.8 20.8 16.2 13.5 11.502054530 (r) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 68.3 57.6 50.8 45.7 41.2 37.2 33.4 29.2 24.2 20.8 17.3 15.2 13.602054530 (w) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 88.2 73.8 64.3 56.9 50.5 44.7 38.9 32.9 25.8 20.8 16.2 13.6 11.5
Table 4. (4-day averaged, adjusted low flow) 67

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02055000 (p) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 106 89.6 78.9 70.7 63.7 57.3 51.0 44.5 36.6 31.1 25.8 22.7 20.102055000 (r) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 95.3 80.8 71.6 64.6 58.5 53.0 47.9 42.1 35.2 30.4 25.6 22.7 20.402055000 (w) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 106 89.4 78.7 70.5 63.5 57.2 51.0 44.4 36.6 31.1 25.7 22.7 20.102055100 (p) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 4.45 3.57 3.02 2.60 2.25 1.94 1.64 1.35 1.01 0.780 0.580 0.470 0.39002055100 (r) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 2.29 1.84 1.56 1.34 1.17 1.01 0.864 0.711 0.539 0.424 0.318 0.258 0.21802055100 (w) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 4.40 3.53 2.99 2.57 2.23 1.92 1.62 1.34 1.00 0.773 0.575 0.466 0.38702056000 (p) Roanoke River below powerplant at Niagara, Va. 509 80 0 173 154 141 130 120 111 102 91.8 78.9 69.3 59.5 53.5 48.502056000 (r) Roanoke River below powerplant at Niagara, Va. 509 80 0 129 110 97.6 88.3 80.2 73.0 66.2 58.5 49.3 43.0 36.5 32.6 29.502056000 (w) Roanoke River below powerplant at Niagara, Va. 509 80 0 172 153 140 129 120 110 101 91.2 78.4 68.8 59.1 53.2 48.202056650 (p) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 14.4 11.7 9.79 8.23 6.86 5.61 4.43 3.25 2.00 1.27 0.720 0.470 0.31002056650 (r) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 18.4 14.0 11.3 9.20 7.46 5.94 4.57 3.23 1.88 1.08 -- -- --02056650 (w) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 14.6 11.8 9.83 8.25 6.87 5.62 4.43 3.25 2.00 1.27 -- -- --02056900 (p) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 55.2 44.7 37.6 31.9 27.1 22.7 18.5 14.3 9.63 6.72 4.31 3.13 2.3002056900 (r) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 41.2 32.2 26.4 21.9 18.1 14.8 11.7 8.59 5.34 3.31 -- -- --02056900 (w) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 54.8 44.3 37.3 31.7 26.9 22.5 18.4 14.2 9.56 6.67 -- -- --02057000 (p) Blackwater River near Union Hall, Va. 208 37 0 113 93.7 80.9 70.8 62.1 54.1 46.3 38.3 28.9 22.5 16.7 13.5 11.002057000 (r) Blackwater River near Union Hall, Va. 208 37 0 79.9 63.6 52.9 44.7 37.6 31.2 25.3 19.2 12.6 8.32 -- -- --02057000 (w) Blackwater River near Union Hall, Va. 208 37 0 112 93.0 80.3 70.2 61.6 53.6 46.0 38.0 28.6 22.3 -- -- --02057500 (p) Roanoke River near Toshes, Va. 1,017 36 0 395 333 293 262 236 212 188 163 133 112 92.2 80.5 70.902057500 (r) Roanoke River near Toshes, Va. 1,017 36 0 471 393 341 300 264 230 199 164 125 98.0 -- -- --02057500 (w) Roanoke River near Toshes, Va. 1,017 36 0 397 334 294 263 236 212 188 163 133 112 -- -- --02058000 (p) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 31.9 27.4 24.4 22.1 20.2 18.4 16.6 14.7 12.4 10.7 9.07 8.10 7.3002058000 (r) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 14.9 11.6 9.35 7.56 5.99 4.48 -- -- -- -- -- -- --02058000 (w) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 31.4 26.9 24.0 21.8 19.8 18.0 -- -- -- -- -- -- --02058400 (p) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 193 162 141 124 108 94.0 79.9 64.9 47.4 35.5 25.0 19.4 15.202058400 (r) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 143 116 97.8 83.7 71.5 60.3 49.9 38.9 26.8 18.8 -- -- --02058400 (w) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 192 161 140 123 108 93.4 79.3 64.5 47.1 35.3 -- -- --02058500 (p) Pigg River along Route 605 near Toshes, Va. 382 32 0 204 177 157 141 126 112 97.9 82.4 63.5 50.0 37.3 30.3 24.702058500 (r) Pigg River along Route 605 near Toshes, Va. 382 32 0 158 128 108 92.7 79.3 67.1 55.7 43.6 30.3 21.4 -- -- --02058500 (w) Pigg River along Route 605 near Toshes, Va. 382 32 0 203 175 156 140 125 111 97.1 81.8 63.0 49.6 -- -- --02059500 (p) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 72.6 62.1 54.5 48.3 42.7 37.3 32.0 26.3 19.5 14.8 10.5 8.23 6.4802059500 (r) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 71.4 56.6 47.0 39.6 33.2 27.4 22.2 16.7 10.9 7.11 -- -- --02059500 (w) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 72.6 61.9 54.4 48.1 42.5 37.1 31.8 26.1 19.3 14.7 -- -- --02060500 (p) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 799 667 579 508 447 390 334 276 207 161 118 94.7 76.8

02060500 (r) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 882 748 659 589 526 467 412 350 280 234 -- -- --

02060500 (w) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 801 669 581 510 449 392 336 277 208 162 -- -- --

02061000 (p) Big Otter River (Otter River) at Route 221 near 

Bedford, Va. 

114 16 0 38.2 28.3 22.8 19.0 16.0 13.5 11.3 9.12 6.81 5.35 4.09 3.42 2.91

02061000 (r) Big Otter River (Otter River) at Route 221 near 

Bedford, Va. 

114 16 0 40.8 31.9 26.1 21.7 17.9 14.6 11.6 8.49 5.28 3.27 -- -- --

02061000 (w) Big Otter River (Otter River) at Route 221 near 

Bedford, Va. 

114 16 0 38.3 28.4 22.9 19.1 16.1 13.5 11.3 9.11 6.79 5.32 -- -- --
68 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 4-day averaged, adjusted low flow (ft3/s) 02061500 (p) Big Otter River (Otter River) at Route 682 near Evington, Va. 315 69 0 116 106 94.8 83.7 72.2 60.2 47.6 34.0 19.0 10.4 4.64 2.47 1.30 02061500 (r) Big Otter River (Otter River) at Route 682 near Evington, Va. 315 69 0 127 102 86.1 73.5 62.6 52.6 43.3 33.6 22.9 15.9 -- -- -- 02061500 (w) Big Otter River (Otter River) at Route 682 near Evington, Va. 315 69 0 116 105 94.5 83.4 71.9 60.0 47.5 34.0 19.1 10.5 -- -- -- 02062500 (p) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,024 854 745 661 589 523 459 392 313 258 205 176 152 02062500 (r) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,233 1,055 936 844 761 681 608 525 432 373 -- -- -- 02062500 (w) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,029 859 749 665 592 526 462 395 315 259 -- -- -- 02064000 (p) Falling River at Route 643 near Naruna, Va. 165 69 0 55.8 49.9 44.6 39.6 34.6 29.6 24.3 18.6 11.9 7.61 4.23 2.71 1.73 02064000 (r) Falling River at Route 643 near Naruna, Va. 165 69 0 35.8 28.0 22.9 18.7 15.1 11.7 -- -- -- -- -- -- --

02064000 (w) Falling River at Route 643 near Naruna, Va. 165 69 0 55.1 49.2 43.9 39.0 34.1 29.1 -- -- -- -- -- -- --02065200 (p) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 733 648 585 530 479 430 378 321 249 197 147 119 97.0

02065200 (r) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,393 1,196 1,064 963 870 781 701 609 506 442 -- -- --

02065200 (w) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 749 661 595 539 487 436 384 326 253 200 -- -- --

02065500 (p) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 25.9 22.7 22.3 22.3 21.9 20.5 17.8 13.2 6.21 2.31 0.460 0.110 0.02002065500 (r) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 22.8 17.8 14.4 11.7 9.38 7.15 -- -- -- -- -- -- --02065500 (w) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 25.7 22.5 22.0 21.9 21.4 20.0 -- -- -- -- -- -- --02066000 (p) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,217 1,051 934 838 752 670 588 499 389 311 237 195 162

02066000 (r) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 937 782 -- -- -- -- -- -- -- -- -- -- --

02066000 (w) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,204 1,039 -- -- -- -- -- -- -- -- -- -- --

02066500 (p) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 31.8 21.1 15.1 11.0 7.94 5.60 3.74 2.24 1.01 0.490 0.200 0.110 0.06002066500 (r) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 30.1 23.6 19.2 15.7 12.6 9.71 -- -- -- -- -- -- --02066500 (w) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 31.7 21.3 15.3 11.2 8.18 5.81 -- -- -- -- -- -- --02067000 (p) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,485 1,265 1,111 985 872 765 659 545 409 315 229 182 146

02067000 (r) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,038 869 -- -- -- -- -- -- -- -- -- -- --

02067000 (w) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,465 1,248 -- -- -- -- -- -- -- -- -- -- --

02069700 (p) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 73.0 63.3 56.4 50.7 45.5 40.6 35.6 30.2 23.5 18.7 14.2 11.6 9.6102069700 (r) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 20.3 15.8 12.8 10.4 8.32 6.30 -- -- -- -- -- -- --02069700 (w) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 71.4 61.9 55.2 49.6 44.6 39.7 -- -- -- -- -- -- --02070000 (p) North Mayo River below Route 629 near Spencer, Va. 108 77 0 73.3 63.9 57.1 51.2 45.8 40.6 35.3 29.5 22.3 17.2 12.5 9.88 7.8702070000 (r) North Mayo River below Route 629 near Spencer, Va. 108 77 0 24.9 19.4 15.8 12.8 10.3 7.86 -- -- -- -- -- -- --02070000 (w) North Mayo River below Route 629 near Spencer, Va. 108 77 0 71.8 62.6 55.9 50.2 44.9 39.8 -- -- -- -- -- -- --
Table 4. (4-day averaged, adjusted low flow) 69

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02071530 (p) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 23.7 17.6 14.5 12.3 10.7 9.39 8.21 7.09 5.89 5.13 4.45 4.09 3.80

02071530 (r) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 7.92 5.92 4.67 3.73 2.96 2.30 1.72 1.17 0.634 0.335 -- -- --

02071530 (w) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 23.3 17.3 14.2 12.1 10.6 9.25 8.09 6.99 5.81 5.06 -- -- --

02072000 (p) Smith River below Philpott Dam near Philpott, Va. 215 59 0 124 105 93.8 85.2 78.0 71.5 65.3 58.9 51.3 45.9 40.7 37.7 35.202072000 (r) Smith River below Philpott Dam near Philpott, Va. 215 59 0 82.9 66.0 55.0 46.5 39.1 32.5 26.4 20.0 13.2 8.76 -- -- --02072000 (w) Smith River below Philpott Dam near Philpott, Va. 215 59 0 123 104 93.0 84.4 77.2 70.8 64.6 58.3 50.7 45.4 -- -- --02072500 (p) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 157 137 124 115 107 100 93.4 86.3 77.9 71.8 66.0 62.5 59.602072500 (r) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 102 81.7 68.4 58.1 49.2 41.1 33.6 25.8 17.3 11.7 -- -- --02072500 (w) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 156 136 123 114 106 99.2 92.4 85.4 77.0 71.1 -- -- --02073000 (p) Smith River below Route 58 at Martinsville, Va. 379 76 0 235 210 192 177 164 151 137 122 103 88.4 73.6 64.7 57.302073000 (r) Smith River below Route 58 at Martinsville, Va. 379 76 0 156 127 107 91.8 78.6 66.4 55.1 43.1 29.9 21.1 -- -- --02073000 (w) Smith River below Route 58 at Martinsville, Va. 379 76 0 234 208 190 176 162 149 136 121 102 87.5 -- -- --02073500 (p) Leatherwood Creek at Route 650 near Martinsville 

(Old Liberty), Va. 

68.4 8 0 18.1 12.9 9.91 7.78 6.13 4.76 3.59 2.52 1.49 0.940 0.530 0.360 0.250

02073500 (r) Leatherwood Creek at Route 650 near Martinsville 

(Old Liberty), Va. 

68.4 8 0 16.8 13.1 10.5 8.55 6.79 5.10 -- -- -- -- -- -- --

02073500 (w) Leatherwood Creek at Route 650 near Martinsville 

(Old Liberty), Va. 

68.4 8 0 18.1 12.9 9.93 7.81 6.15 4.77 -- -- -- -- -- -- --

02074500 (p) Sandy River above Route 863 near Danville, Va. 111 76 0 50.9 42.6 37.1 32.8 29.0 25.5 22.0 18.4 14.2 11.2 8.50 6.99 5.8002074500 (r) Sandy River above Route 863 near Danville, Va. 111 76 0 25.5 19.9 16.1 13.2 10.6 8.07 -- -- -- -- -- -- --02074500 (w) Sandy River above Route 863 near Danville, Va. 111 76 0 50.1 41.9 36.5 32.2 28.5 25.0 -- -- -- -- -- -- --02075000 (p) Dan River at railroad bridge at Danville, Va. 2,060 60 0 975 861 784 721 664 610 555 495 419 362 305 270 24102075000 (r) Dan River at railroad bridge at Danville, Va. 2,060 60 0 314 251 210 178 151 128 -- -- -- -- -- -- --02075000 (w) Dan River at railroad bridge at Danville, Va. 2,060 60 0 955 844 769 707 652 599 -- -- -- -- -- -- --02075045 (p) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 1,158 981 850 738 637 540 445 345 231 158 98.1 69.0 48.802075045 (r) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 321 257 215 183 155 132 -- -- -- -- -- -- --02075045 (w) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 1,130 958 830 722 623 529 -- -- -- -- -- -- --02075500 (p) Dan River at Route 658 at Paces, Va. 2,587 56 0 1,164 1,015 908 819 738 660 581 494 387 310 236 194 16102075500 (r) Dan River at Route 658 at Paces, Va. 2,587 56 0 382 306 256 218 186 159 -- -- -- -- -- -- --02075500 (w) Dan River at Route 658 at Paces, Va. 2,587 56 0 1,140 994 890 803 724 648 -- -- -- -- -- -- --02076500 (p) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 5.35 4.53 4.00 3.58 3.22 2.89 2.57 2.22 1.81 1.52 1.23 1.07 0.94002076500 (r) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 2.99 2.28 1.81 1.43 1.09 0.762 -- -- -- -- -- -- --02076500 (w) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 5.28 4.47 3.94 3.52 3.17 2.84 -- -- -- -- -- -- --02077000 (p) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 172 141 120 103 88.0 74.2 60.8 47.2 31.9 22.3 14.2 10.3 7.4902077000 (r) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 100 79.4 65.5 54.6 45.1 36.5 -- -- -- -- -- -- --02077000 (w) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 169 139 118 102 86.8 73.1 -- -- -- -- -- -- --02077500 (p) Hyco River at Route 501 near Denniston, Va. 288 59 0 28.7 24.2 20.2 16.7 13.4 10.3 7.46 4.75 2.21 1.03 0.370 0.170 0.08002077500 (r) Hyco River at Route 501 near Denniston, Va. 288 59 0 57.8 45.5 37.3 30.8 25.1 19.9 -- -- -- -- -- -- --02077500 (w) Hyco River at Route 501 near Denniston, Va. 288 59 0 30.1 25.2 21.0 17.3 13.9 10.7 -- -- -- -- -- -- --02078000 (p) Hyco River at Route 738 near Omega, Va. 412 15 0 38.3 25.2 18.5 14.2 11.0 8.49 6.41 4.59 2.86 1.92 1.21 0.890 0.66002078000 (r) Hyco River at Route 738 near Omega, Va. 412 15 0 78.7 62.0 51.0 42.4 34.8 27.9 -- -- -- -- -- -- --02078000 (w) Hyco River at Route 738 near Omega, Va. 412 15 0 40.0 26.7 19.8 15.2 11.8 9.17 -- -- -- -- -- -- --02079000 (p) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 3,360 2,854 2,540 2,302 2,101 1,920 1,744 1,560 1,340 1,184 1,031 942 86702079000 (r) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 942 761 644 557 484 430 -- -- -- -- -- -- --02079000 (w) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 3,288 2,794 2,489 2,257 2,062 1,884 -- -- -- -- -- -- --
70 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

02079640 (p) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 5.36 3.15 2.09 1.43 0.990 0.660 0.400 0.200 0.000 0.000 0.000 0.000 0.00002079640 (r) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 13.6 10.5 8.50 6.87 5.43 4.04 -- -- -- -- -- -- --02079640 (w) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 5.86 3.58 2.44 1.72 1.21 0.827 -- -- -- -- -- -- --03164000 (p) New River at Route 94 near Galax, Va. 1,141 76 0 875 765 693 636 587 540 493 443 381 335 289 261 23803164000 (r) New River at Route 94 near Galax, Va. 1,141 76 0 536 449 390 345 304 266 231 192 147 117 -- -- --03164000 (w) New River at Route 94 near Galax, Va. 1,141 76 0 867 758 687 630 581 535 489 439 377 332 -- -- --03164500 (p) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- --03164500 (r) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- --03164500 (w) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- --03165000 (p) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 38.0 33.1 30.0 27.5 25.3 23.2 21.2 19.0 16.3 14.4 12.4 11.2 10.203165000 (r) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 12.4 9.41 7.50 6.06 4.86 3.83 2.90 2.02 1.14 0.627 -- -- --03165000 (w) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 37.4 32.6 29.5 27.0 24.9 22.9 20.9 18.8 16.1 14.2 -- -- --03165500 (p) New River at Ivanhoe, Va. 1,350 59 0 947 811 724 656 598 545 493 438 371 322 275 247 22403165500 (r) New River at Ivanhoe, Va. 1,350 59 0 647 544 475 422 374 329 287 241 188 152 -- -- --03165500 (w) New River at Ivanhoe, Va. 1,350 59 0 940 805 719 651 594 541 490 435 368 320 -- -- --03166800 (p) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.140 0.110 0.090 0.070 0.060 0.050 0.040 0.040 0.030 0.020 0.020 0.010 0.01003166800 (r) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 1.35 1.08 0.906 0.779 0.672 0.579 0.490 0.400 0.299 0.232 0.171 0.137 0.11503166800 (w) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.170 0.134 0.110 0.087 0.075 0.062 0.050 0.048 0.036 0.024 0.023 0.012 0.01203167000 (p) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 90.3 82.4 76.9 72.3 68.3 64.3 60.3 55.8 49.9 45.4 40.6 37.6 35.103167000 (r) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 62.3 52.5 46.3 41.5 37.4 33.8 30.3 26.4 21.9 18.7 15.5 13.6 12.203167000 (w) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 89.7 81.7 76.2 71.7 67.6 63.7 59.7 55.2 49.4 44.9 40.2 37.2 34.703167500 (p) Big Reed Island Creek below Route 693 near Allisonia, Va. 267 63 0 204 180 164 152 141 131 121 110 96.2 86.1 75.9 69.7 64.403167500 (r) Big Reed Island Creek below Route 693 near Allisonia, Va. 267 63 0 106 84.7 70.9 60.3 51.1 42.7 35.0 26.9 18.0 12.3 -- -- --03167500 (w) Big Reed Island Creek below Route 693 near Allisonia, Va. 267 63 0 202 178 162 150 139 129 119 108 95.1 85.1 -- -- --03168000 (p) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,401 1,232 1,122 1,036 962 892 823 749 656 588 519 478 44303168000 (r) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,123 959 849 764 687 613 546 469 383 328 -- -- --03168000 (w) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,394 1,226 1,117 1,031 956 887 818 744 652 585 -- -- --03168500 (p) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 4.53 2.93 2.22 1.79 1.49 1.26 1.08 0.910 0.750 0.660 0.580 0.550 0.52003168500 (r) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 13.3 11.0 9.48 8.36 7.41 6.56 5.75 4.88 3.88 3.19 2.53 2.14 1.8603168500 (w) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 4.76 3.14 2.41 1.96 1.64 1.39 1.19 1.00 0.821 0.715 0.621 0.582 0.54603170000 (p) Little River at Route 693 at Graysontown (Graysonton), Va. 309 78 0 176 149 132 119 108 97.4 87.3 76.6 63.7 54.5 45.6 40.4 36.103170000 (r) Little River at Route 693 at Graysontown (Graysonton), Va. 309 78 0 124 100 84.2 71.9 61.1 51.3 42.3 32.7 22.3 15.4 -- -- --03170000 (w) Little River at Route 693 at Graysontown (Graysonton), Va. 309 78 0 174 148 131 118 107 96.5 86.5 75.9 63.1 54.0 -- -- --03171000 (p) New River below Route 11 at Radford, Va. 2,767 75 0 1,507 1,324 1,216 1,136 1,071 1,013 958 902 837 793 751 728 70803171000 (r) New River below Route 11 at Radford, Va. 2,767 75 0 1,443 1,240 1,104 1,000 904 813 730 635 529 464 -- -- --03171000 (w) New River below Route 11 at Radford, Va. 2,767 75 0 1,506 1,323 1,214 1,134 1,068 1,009 954 898 833 789 -- -- --03171500 (p) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,631 1,444 1,325 1,233 1,153 1,080 1,007 930 834 764 694 651 61503171500 (r) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,556 1,340 1,195 1,084 983 885 798 696 584 516 -- -- --03171500 (w) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,630 1,442 1,323 1,230 1,150 1,076 1,004 926 831 761 -- -- --03173000 (p) Walker Creek below Route 100 at Bane, Va. 299 68 0 64.5 54.3 48.6 44.6 41.5 38.8 36.3 33.9 31.3 29.6 28.1 27.3 26.703173000 (r) Walker Creek below Route 100 at Bane, Va. 299 68 0 72.9 61.6 54.4 48.9 44.2 39.9 35.9 31.4 26.1 22.4 18.7 16.5 14.803173000 (w) Walker Creek below Route 100 at Bane, Va. 299 68 0 64.6 54.5 48.8 44.7 41.5 38.8 36.3 33.9 31.2 29.5 27.9 27.1 26.5
Table 4. (4-day averaged, adjusted low flow) 71

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

03175500 (p) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 52.2 44.6 39.8 36.1 33.0 30.1 27.3 24.3 20.6 18.0 15.5 14.0 12.703175500 (r) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 53.3 44.8 39.5 35.3 31.8 28.6 25.6 22.3 18.4 15.6 12.9 11.3 10.103175500 (w) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 52.2 44.6 39.8 36.1 33.0 30.1 27.2 24.2 20.6 18.0 15.4 13.9 12.703176500 (p) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 1,963 1,727 1,578 1,462 1,363 1,272 1,182 1,086 969 883 797 746 70203176500 (r) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 2,047 1,776 1,594 1,455 1,328 1,205 1,097 970 832 755 -- -- --03176500 (w) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 1,965 1,728 1,578 1,462 1,362 1,271 1,181 1,085 967 881 -- -- --03177700 (p) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 14.1 11.9 10.6 9.70 8.95 8.30 7.69 7.08 6.37 5.89 5.45 5.20 4.99

03177700 (r) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 8.44 6.90 5.94 5.21 4.59 4.05 3.52 2.96 2.33 1.89 1.48 1.24 1.07

03177700 (w) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 14.0 11.8 10.5 9.61 8.86 8.21 7.61 7.00 6.29 5.82 5.38 5.13 4.93

03177710 (p) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 14.1 13.2 12.4 11.8 11.2 10.6 9.90 9.13 8.08 7.24 6.33 5.75 5.2403177710 (r) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 9.49 7.78 6.70 5.89 5.20 4.58 3.99 3.37 2.65 2.16 1.70 1.42 1.2303177710 (w) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 14.0 13.0 12.3 11.7 11.1 10.4 9.78 9.02 7.98 7.15 6.25 5.68 5.1803207500 (p) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 21.3 14.9 11.1 8.47 6.44 4.81 3.44 2.25 1.18 0.660 0.320 0.190 0.12003207500 (r) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 41.8 31.7 25.6 21.0 17.2 13.9 11.0 8.07 5.11 3.37 2.04 1.42 --03207500 (w) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 35.8 26.6 21.0 16.7 13.2 10.2 7.64 5.19 2.79 1.66 0.844 0.516 --03207800 (p) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 47.8 39.8 34.5 30.3 26.6 23.3 20.0 16.6 12.6 9.85 7.34 5.97 4.9003207800 (r) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 50.4 38.2 30.9 25.4 20.8 16.9 13.4 9.96 6.40 4.30 2.65 1.90 --03207800 (w) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 49.4 38.9 32.4 27.6 23.6 20.2 17.1 14.0 10.7 8.35 6.32 5.21 --03208500 (p) Russell Fork below Route 63 at Haysi, Va. 286 79 0 32.6 22.5 16.6 12.6 9.51 7.05 5.01 3.25 1.69 0.940 0.450 0.270 0.16003208500 (r) Russell Fork below Route 63 at Haysi, Va. 286 79 0 48.8 37.0 29.9 24.6 20.1 16.3 13.0 9.60 6.16 4.13 2.54 1.81 --03208500 (w) Russell Fork below Route 63 at Haysi, Va. 286 79 0 44.1 32.7 25.7 20.5 16.3 12.6 9.50 6.50 3.54 2.13 1.10 0.685 --03208700 (p) North Fork Pound River below dam at Pound, Va. 18.5 25 0 5.37 3.90 2.92 2.20 1.62 1.15 0.760 0.450 0.190 0.080 0.030 0.010 0.01003208700 (r) North Fork Pound River below dam at Pound, Va. 18.5 25 0 4.58 3.47 2.76 2.22 1.76 1.36 1.01 0.680 0.360 0.192 0.092 0.044 --03208700 (w) North Fork Pound River below dam at Pound, Va. 18.5 25 0 4.77 3.58 2.80 2.22 1.72 1.29 0.915 0.582 0.271 0.129 0.053 0.021 --03208800 (p) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 7.23 6.80 6.29 5.72 5.09 4.39 3.61 2.71 1.64 0.960 0.470 0.260 0.15003208800 (r) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 8.28 6.28 5.01 4.05 3.24 2.54 1.91 1.32 0.732 0.413 0.211 0.112 --03208800 (w) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 7.89 6.48 5.53 4.76 4.08 3.44 2.81 2.13 1.34 0.801 0.409 0.230 --03208850 (p) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 11.3 10.4 9.60 8.78 7.93 7.02 6.01 4.85 3.36 2.33 1.43 0.980 0.67003208850 (r) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 12.9 9.77 7.82 6.35 5.11 4.03 3.08 2.16 1.24 0.733 0.391 0.223 --03208850 (w) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 12.2 10.0 8.58 7.44 6.45 5.56 4.70 3.78 2.71 1.89 1.20 0.837 --03208900 (p) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 14.9 12.6 11.0 9.58 8.34 7.16 5.99 4.75 3.32 2.37 1.56 1.15 0.85003208900 (r) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 16.3 12.4 9.92 8.07 6.51 5.16 3.97 2.81 1.65 0.995 0.545 0.323 --03208900 (w) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 15.7 12.5 10.4 8.73 7.36 6.17 5.07 3.97 2.79 1.99 1.33 0.990 --03208950 (p) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 14.1 10.9 8.98 7.55 6.37 5.35 4.40 3.47 2.45 1.81 1.26 0.980 0.77003208950 (r) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 13.8 10.5 8.41 6.83 5.50 4.35 3.32 2.34 1.36 0.804 0.433 0.250 --03208950 (w) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 13.9 10.7 8.64 7.14 5.90 4.84 3.90 3.00 2.10 1.52 1.07 0.834 --03209000 (p) Pound River near Haysi, Va. 221 79 0 52.3 34.1 23.9 17.0 12.1 8.31 5.39 3.10 1.32 0.600 0.230 0.110 0.06003209000 (r) Pound River near Haysi, Va. 221 79 0 39.0 29.6 23.9 19.6 16.0 12.9 10.2 7.48 4.71 3.09 1.86 1.27 --03209000 (w) Pound River near Haysi, Va. 221 79 0 41.9 30.6 23.9 18.9 14.9 11.5 8.53 5.75 3.04 1.76 0.871 0.517 --03209200 (p) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 107 90.5 77.2 65.5 54.8 44.7 34.9 25.0 14.5 8.50 4.27 2.55 1.5203209200 (r) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 82.6 62.7 50.8 42.0 34.6 28.4 22.9 17.3 11.6 8.17 5.31 4.13 --03209200 (w) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 91.2 72.7 60.9 51.5 43.3 36.0 29.0 21.6 13.4 8.40 4.53 2.89 --
72 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 4-day averaged, adjusted low flow (ft3/s) 03471500 (p) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 36.1 31.5 28.7 26.6 24.9 23.3 21.8 20.2 18.3 17.0 15.7 14.9 14.3 03471500 (r) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 17.0 14.1 12.2 10.8 9.60 8.53 7.50 6.39 5.11 4.23 3.38 2.87 2.51 03471500 (w) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 35.7 31.1 28.4 26.3 24.5 23.0 21.5 19.9 18.1 16.8 15.5 14.7 14.1 03472500 (p) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 15.0 13.0 11.6 10.3 9.19 8.09 6.98 5.78 4.31 3.29 2.35 1.84 1.45 03472500 (r) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 12.1 9.95 8.60 7.57 6.70 5.93 5.19 4.40 3.48 2.86 2.26 1.91 1.65 03472500 (w) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 15.0 13.0 11.5 10.3 9.13 8.04 6.94 5.75 4.29 3.28 2.35 1.84 1.45 03473000 (p) South Fork Holston River above Route 58 near Damascus, Va. 303 75 0 138 120 109 102 94.9 89.0 83.3 77.5 70.5 65.6 60.9 58.1 55.8

03473000 (r) South Fork Holston River above Route 58 near 

Damascus, Va. 

303 75 0 74.0 62.5 55.2 49.7 44.8 40.5 36.4 31.9 26.5 22.8 19.0 16.8 15.0

03473000 (w) South Fork Holston River above Route 58 near 

Damascus, Va. 

303 75 0 136 119 108 100 93.9 88.0 82.4 76.6 69.7 64.8 60.2 57.4 55.2

03473500 (p) Middle Fork Holston River at Route 679 at Groseclose, Va. 7.4 11 0 4.12 3.77 3.54 3.36 3.19 3.03 2.87 2.70 2.47 2.30 2.12 2.01 1.9203473500 (r) Middle Fork Holston River at Route 679 at Groseclose, Va. 7.4 11 0 1.40 1.12 0.941 0.809 0.699 0.602 0.510 0.416 0.312 0.242 0.179 0.143 0.12003473500 (w) Middle Fork Holston River at Route 679 at Groseclose, Va. 7.4 11 0 4.06 3.71 3.49 3.31 3.14 2.98 2.82 2.66 2.43 2.26 2.09 1.98 1.8903474000 (p) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 46.9 41.8 38.6 36.1 34.0 32.1 30.3 28.3 26.0 24.3 22.6 21.6 20.8

03474000 (r) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 30.5 25.4 22.2 19.8 17.7 15.8 14.0 12.1 9.80 8.23 6.69 5.78 5.09

03474000 (w) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 46.6 41.4 38.2 35.8 33.7 31.8 30.0 28.0 25.7 24.0 22.3 21.3 20.5

03474500 (p) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 61.9 52.9 47.1 42.6 38.7 35.2 31.6 27.9 23.4 20.1 16.9 15.1 13.5

03474500 (r) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 35.7 29.8 26.1 23.3 20.8 18.7 16.6 14.4 11.7 9.86 8.06 6.98 6.17

03474500 (w) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 61.3 52.4 46.7 42.2 38.3 34.8 31.3 27.6 23.1 19.9 16.8 14.9 13.4

03475000 (p) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 81.4 72.2 66.0 61.0 56.7 52.6 48.4 44.0 38.3 34.1 29.8 27.2 25.003475000 (r) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 49.0 41.1 36.2 32.4 29.1 26.2 23.4 20.3 16.7 14.2 11.7 10.2 9.0903475000 (w) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 80.7 71.5 65.3 60.4 56.1 52.0 47.9 43.5 37.9 33.7 29.5 26.9 24.703477500 (p) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 6.91 5.85 5.23 4.78 4.41 4.09 3.78 3.48 3.12 2.88 2.65 2.52 2.41

03477500 (r) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 2.71 2.18 1.85 1.60 1.39 1.21 1.04 0.855 0.651 0.514 0.388 0.316 0.267

03477500 (w) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 6.82 5.77 5.16 4.71 4.35 4.03 3.72 3.43 3.07 2.84 2.61 2.48 2.38
Table 4. (4-day averaged, adjusted low flow) 73

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

03478400 (p) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 14.8 13.2 12.2 11.5 10.8 10.2 9.65 9.04 8.29 7.75 7.22 6.90 6.6303478400 (r) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 5.57 4.53 3.88 3.39 2.97 2.60 2.25 1.88 1.46 1.17 0.906 0.751 0.64303478400 (w) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 14.6 13.0 12.0 11.3 10.6 10.1 9.50 8.90 8.16 7.63 7.11 6.80 6.5403488000 (p) North Fork Holston River along Route 91 near 

Saltville, Va. 

221 86 0 52.1 44.1 39.3 35.8 33.0 30.5 28.1 25.7 22.8 20.9 19.0 17.9 17.0

03488000 (r) North Fork Holston River along Route 91 near 

Saltville, Va. 

221 86 0 52.8 44.4 39.1 35.0 31.5 28.3 25.4 22.1 18.2 15.5 12.8 11.2 9.96

03488000 (w) North Fork Holston River along Route 91 near 

Saltville, Va. 

221 86 0 52.1 44.1 39.3 35.8 32.9 30.4 28.0 25.6 22.7 20.8 18.9 17.8 16.9

03489500 (p) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 132 110 96.5 86.2 77.5 69.6 62.0 54.0 44.6 38.0 31.6 27.9 24.9

03489500 (r) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 124 106 94.2 85.2 77.4 70.4 63.8 56.4 47.5 41.3 35.1 31.3 28.3

03489500 (w) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 131 110 96.4 86.2 77.5 69.6 62.0 54.1 44.6 38.0 31.7 28.0 25.0

03489900 (p) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 18.6 15.6 13.6 12.1 10.8 9.61 8.44 7.22 5.75 4.73 3.76 3.21 2.7703489900 (r) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 17.7 14.7 12.7 11.3 10.0 8.91 7.84 6.69 5.35 4.43 3.54 3.02 2.6403489900 (w) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 18.6 15.5 13.6 12.1 10.8 9.59 8.43 7.21 5.74 4.72 3.76 3.21 2.7703490000 (p) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 145 121 107 96.2 87.5 79.8 72.6 65.1 56.4 50.4 44.6 41.3 38.6

03490000 (r) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 173 148 132 120 109 99.9 90.9 80.8 68.6 60.2 51.7 46.5 42.2

03490000 (w) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 146 122 107 96.7 88.0 80.3 72.9 65.4 56.7 50.6 44.8 41.4 38.6

03521500 (p) Clinch River along Route 707 at Richlands, Va. 137 43 0 34.7 29.5 26.3 24.0 22.0 20.3 18.6 16.9 14.8 13.4 12.0 11.2 10.603521500 (r) Clinch River along Route 707 at Richlands, Va. 137 43 0 31.7 26.4 23.1 20.6 18.4 16.5 14.6 12.6 10.2 8.62 7.01 6.06 5.3403521500 (w) Clinch River along Route 707 at Richlands, Va. 137 43 0 34.6 29.4 26.3 23.9 21.9 20.2 18.5 16.8 14.8 13.3 11.9 11.1 10.503524000 (p) Clinch River above Route 661 at Cleveland, Va. 533 86 0 128 107 95.0 86.0 78.6 72.0 65.8 59.4 51.9 46.7 41.7 38.8 36.403524000 (r) Clinch River above Route 661 at Cleveland, Va. 533 86 0 135 115 103 92.9 84.5 76.9 69.8 61.7 52.1 45.4 38.7 34.6 31.303524000 (w) Clinch River above Route 661 at Cleveland, Va. 533 86 0 128 107 95.2 86.1 78.7 72.1 65.8 59.4 51.9 46.6 41.6 38.7 36.303524500 (p) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 17.1 11.5 8.66 6.83 5.48 4.41 3.51 2.69 1.88 1.40 1.02 0.820 0.68003524500 (r) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 17.5 13.3 10.6 8.67 7.00 5.56 4.28 3.04 1.80 1.09 0.601 0.361 --03524500 (w) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 17.3 12.6 9.89 7.93 6.35 5.02 3.89 2.85 1.85 1.30 0.914 0.720 --03525000 (p) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03525000 (r) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03525000 (w) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03526000 (p) Copper Creek at Route 619 near Gate City, Va. 106 26 0 35.1 30.9 28.3 26.3 24.6 23.0 21.4 19.8 17.8 16.4 14.9 14.1 13.403526000 (r) Copper Creek at Route 619 near Gate City, Va. 106 26 0 24.1 20.0 17.4 15.5 13.8 12.3 10.9 9.35 7.54 6.29 5.08 4.36 3.8303526000 (w) Copper Creek at Route 619 near Gate City, Va. 106 26 0 34.9 30.7 28.1 26.0 24.3 22.8 21.2 19.6 17.6 16.2 14.8 13.9 13.203527000 (p) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 256 212 186 167 151 138 125 112 96.7 86.3 76.3 70.6 66.003527000 (r) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 300 259 232 212 195 179 164 148 127 113 98.7 90.1 82.503527000 (w) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 257 213 187 168 152 139 126 113 97.3 86.7 76.7 71.0 66.203527500 (p) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03527500 (r) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03527500 (w) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03529500 (p) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 31.7 25.8 22.0 19.2 16.7 14.5 12.4 10.2 7.70 6.03 4.51 3.68 3.0403529500 (r) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 21.7 16.5 13.2 10.8 8.75 6.98 5.41 3.88 2.33 1.44 0.814 0.507 --03529500 (w) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 25.6 20.2 17.0 14.5 12.5 10.8 9.26 7.70 6.04 4.78 3.70 3.08 --
74 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

4-day averaged, adjusted low flow (ft3/s)

03530000 (p) South Fork Powell River at Route 23 at Big Stone 

Gap, Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530000 (r) South Fork Powell River at Route 23 at Big Stone 

Gap, Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530000 (w) South Fork Powell River at Route 23 at Big Stone 

Gap, Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530500 (p) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 9.67 7.37 5.82 4.63 3.64 2.78 2.03 1.35 0.700 0.380 0.180 0.100 0.060

03530500 (r) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 14.7 11.1 8.93 7.25 5.84 4.63 3.54 2.50 1.46 0.868 0.470 0.274 --

03530500 (w) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 13.1 9.93 7.88 6.32 5.00 3.85 2.85 1.91 0.997 0.552 0.264 0.144 --

03531000 (p) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 59.4 43.5 35.3 29.7 25.5 22.0 18.9 16.0 12.9 10.9 9.15 8.21 7.4803531000 (r) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 49.4 37.5 30.3 24.9 20.4 16.5 13.1 9.73 6.24 4.19 2.58 1.84 --03531000 (w) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 53.2 39.9 32.4 27.0 22.8 19.3 16.3 13.5 10.8 9.03 7.68 6.99 --03531500 (p) Powell River at Route 70 near Jonesville, Va. 319 75 0 74.3 62.0 54.5 48.7 43.9 39.5 35.3 30.9 25.7 22.0 18.5 16.5 14.803531500 (r) Powell River at Route 70 near Jonesville, Va. 319 75 0 53.6 40.7 32.9 27.1 22.2 18.0 14.4 10.7 6.89 4.66 2.89 2.09 --03531500 (w) Powell River at Route 70 near Jonesville, Va. 319 75 0 62.0 49.6 42.3 37.0 32.8 29.3 26.2 23.1 20.1 17.5 15.2 13.9 --
Table 4. (7-day averaged, adjusted low flow) 75

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01484800 (p) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 4 0.270 0.190 0.140 0.100 0.070 0.050 0.030 0.010 0.000 0.000 0.000 0.000 0.00001484800 (r) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 4 0.511 0.354 0.259 0.189 0.137 0.096 -- -- -- -- -- -- --01484800 (w) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 4 0.311 0.217 0.158 0.113 0.079 0.056 -- -- -- -- -- -- --01613900 (p) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 1.87 1.42 1.17 0.990 0.840 0.720 0.610 0.500 0.380 0.300 0.230 0.200 0.17001613900 (r) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 3.26 2.62 2.22 1.93 1.68 1.46 1.25 1.04 0.801 0.643 0.493 0.414 0.34901613900 (w) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 1.90 1.45 1.20 1.01 0.860 0.737 0.625 0.512 0.389 0.307 0.235 0.204 0.17301614830 (p) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 6.67 4.59 3.53 2.83 2.31 1.89 1.53 1.20 0.860 0.660 0.490 0.400 0.34001614830 (r) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 3.11 2.49 2.11 1.84 1.60 1.39 1.19 0.989 0.759 0.608 0.466 0.391 0.32901614830 (w) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 6.57 4.53 3.49 2.80 2.29 1.88 1.52 1.19 0.858 0.659 0.489 0.400 0.34001615000 (p) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 12.5 9.72 7.93 6.56 5.42 4.42 3.50 2.61 1.67 1.11 0.680 0.480 0.34001615000 (r) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 13.0 10.7 9.21 8.13 7.20 6.37 5.56 4.75 3.78 3.13 2.50 2.15 1.8701615000 (w) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 12.5 9.75 7.96 6.60 5.47 4.47 3.55 2.66 1.72 1.16 0.720 0.515 0.37101615500 (p) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 2.72 2.52 2.37 2.22 2.08 1.94 1.78 1.59 1.34 1.14 0.920 0.790 0.68001615500 (r) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 1.13 0.893 0.748 0.641 0.552 0.475 0.401 0.327 0.244 0.191 0.142 0.117 0.09701615500 (w) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 2.69 2.49 2.34 2.19 2.05 1.91 1.75 1.57 1.32 1.12 0.906 0.779 0.67101616000 (p) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 14.2 12.3 11.1 10.2 9.44 8.72 8.02 7.27 6.34 5.67 5.01 4.61 4.2701616000 (r) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 3.50 2.82 2.39 2.08 1.81 1.58 1.35 1.13 0.868 0.697 0.536 0.451 0.38001616000 (w) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 13.9 12.1 10.9 10.1 9.28 8.57 7.89 7.15 6.24 5.58 4.93 4.54 4.2101616100 (p) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 6.74 5.78 5.16 4.67 4.25 3.86 3.48 3.08 2.58 2.23 1.88 1.68 1.5001616100 (r) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 2.20 1.76 1.48 1.28 1.11 0.964 0.821 0.678 0.516 0.410 0.311 0.259 0.21701616100 (w) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 6.64 5.69 5.08 4.60 4.18 3.80 3.43 3.03 2.54 2.20 1.85 1.66 1.4801620500 (p) North River above Forest Road near Stokesville, Va. 17.3 59 0 2.31 1.55 1.16 0.910 0.730 0.580 0.460 0.340 0.230 0.170 0.120 0.100 0.08001620500 (r) North River above Forest Road near Stokesville, Va. 17.3 59 0 3.57 2.87 2.44 2.12 1.85 1.61 1.38 1.15 0.887 0.712 0.548 0.461 0.38901620500 (w) North River above Forest Road near Stokesville, Va. 17.3 59 0 2.35 1.59 1.20 0.944 0.761 0.609 0.485 0.362 0.247 0.183 0.130 0.108 0.08701621050 (p) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 4.73 2.72 1.89 1.42 1.10 0.870 0.690 0.530 0.390 0.310 0.250 0.220 0.19001621050 (r) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 2.91 2.33 1.98 1.72 1.49 1.30 1.11 0.921 0.706 0.565 0.432 0.362 0.30401621050 (w) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 4.67 2.71 1.89 1.43 1.11 0.883 0.702 0.541 0.399 0.317 0.255 0.223 0.19301622000 (p) North River along Route 693 near Burketown, Va. 376 75 0 104 85.0 74.1 66.3 60.1 54.7 49.7 44.8 39.2 35.4 32.0 30.0 28.401622000 (r) North River along Route 693 near Burketown, Va. 376 75 0 95.1 80.5 71.2 64.4 58.3 52.9 47.3 42.0 35.2 30.6 25.8 23.1 20.801622000 (w) North River along Route 693 near Burketown, Va. 376 75 0 104 84.9 74.0 66.3 60.0 54.7 49.7 44.7 39.1 35.4 31.8 29.9 28.301624000 (p) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 1 0.520 0.330 0.240 0.180 0.140 0.110 0.080 0.050 0.000 0.000 0.000 0.000 0.000

01624000 (r) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 1 1.95 1.55 1.31 1.13 0.979 0.846 0.720 0.593 0.450 0.356 0.270 0.224 0.187

01624000 (w) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 1 0.561 0.365 0.270 0.206 0.163 0.130 0.097 0.064 0.011 0.009 0.006 0.005 0.004

01624300 (p) Middle River at Route 742 near Verona, Va. 179 18 0 64.0 54.8 49.2 45.0 41.4 38.3 35.2 32.0 28.3 25.6 23.0 21.5 20.201624300 (r) Middle River at Route 742 near Verona, Va. 179 18 0 43.1 36.0 31.6 28.3 25.4 22.8 20.2 17.6 14.5 12.4 10.2 8.98 7.9801624300 (w) Middle River at Route 742 near Verona, Va. 179 18 0 63.6 54.4 48.8 44.6 41.1 37.9 34.9 31.8 28.0 25.4 22.8 21.3 20.001624800 (p) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 29.3 24.9 22.2 20.1 18.4 16.8 15.3 13.7 11.9 10.5 9.23 8.47 7.8301624800 (r) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 16.6 13.6 11.8 10.5 9.29 8.24 7.21 6.19 4.96 4.13 3.32 2.87 2.5001624800 (w) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 29.1 24.7 22.0 19.9 18.2 16.6 15.1 13.6 11.7 10.4 9.13 8.38 7.7401625000 (p) Middle River at Route 769 near Grottoes, Va. 373 78 0 121 107 97.5 89.3 81.8 74.7 67.3 59.2 48.9 41.3 33.6 29.1 25.301625000 (r) Middle River at Route 769 near Grottoes, Va. 373 78 0 94.3 79.8 70.6 63.8 57.8 52.4 46.9 41.6 34.9 30.3 25.5 22.8 20.601625000 (w) Middle River at Route 769 near Grottoes, Va. 373 78 0 121 107 96.9 88.7 81.3 74.2 66.9 58.8 48.6 41.0 33.5 29.0 25.301625900 (p) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 -- -- -- -- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00001625900 (r) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 14.0 10.5 8.41 6.80 5.47 4.32 3.29 2.30 1.32 0.764 -- -- --01625900 (w) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 1 -- -- -- -- -- -- -- -- -- -- -- -- --
76 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 7-day averaged, adjusted low flow (ft3/s) 01626000 (p) South River at Route 664 near Waynesboro, Va. 127 54 0 46.5 40.3 36.6 33.9 31.6 29.6 27.7 25.7 23.4 21.8 20.3 19.4 18.7 01626000 (r) South River at Route 664 near Waynesboro, Va. 127 54 0 29.9 24.9 21.7 19.3 17.3 15.4 13.6 11.8 9.62 8.12 6.64 5.81 5.12 01626000 (w) South River at Route 664 near Waynesboro, Va. 127 54 0 46.1 40.0 36.3 33.6 31.3 29.3 27.4 25.4 23.2 21.6 20.0 19.2 18.4 01626500 (p) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 54.8 47.6 43.1 39.7 36.9 34.3 31.8 29.2 26.0 23.8 21.5 20.2 19.1 01626500 (r) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 31.4 26.1 22.8 20.3 18.2 16.3 14.4 12.5 10.2 8.59 7.03 6.16 5.43 01626500 (w) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 54.3 47.1 42.7 39.3 36.5 33.9 31.4 28.8 25.7 23.5 21.3 20.0 18.9 01626850 (p) South River at Hopeman Parkway near Dooms, Va. 148 22 0 77.6 67.9 62.6 59.0 56.1 53.7 51.7 49.7 47.7 46.5 45.6 45.2 45.0 01626850 (r) South River at Hopeman Parkway near Dooms, Va. 148 22 0 35.2 29.3 25.6 22.9 20.5 18.4 16.2 14.1 11.6 9.79 8.04 7.05 6.24 01626850 (w) South River at Hopeman Parkway near Dooms, Va. 148 22 0 76.7 67.1 61.9 58.2 55.4 53.0 51.0 49.0 47.0 45.9 45.0 44.6 44.4 01627500 (p) South River at Route 778 at Harriston, Va. 212 65 0 91.5 81.8 75.5 70.5 66.2 62.1 58.1 53.7 48.2 44.1 39.9 37.4 35.2 01627500 (r) South River at Route 778 at Harriston, Va. 212 65 0 51.6 43.3 38.0 34.1 30.7 27.6 24.5 21.5 17.8 15.2 12.6 11.1 9.93

01627500 (w) South River at Route 778 at Harriston, Va. 212 65 0 90.7 81.0 74.7 69.8 65.4 61.4 57.4 53.0 47.6 43.5 39.4 36.9 34.801628060 (p) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 10 0.040 0.020 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01628060 (r) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 10 0.465 0.319 0.235 0.175 0.129 0.093 0.063 0.037 0.017 0.007 -- -- --

01628060 (w) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 10 0.054 0.029 0.016 0.005 0.003 0.002 0.001 0.001 0.000 0.000 -- -- --

01628500 (p) South Fork Shenandoah River below Lower Lewis Run 

near Lynnwood, Va. 

1,079 75 0 368 312 278 252 231 212 193 174 151 135 119 110 102

01628500 (r) South Fork Shenandoah River below Lower Lewis Run 

near Lynnwood, Va. 

1,079 75 0 293 252 226 207 190 175 159 144 124 111 96.5 88.1 81.4

01628500 (w) South Fork Shenandoah River below Lower Lewis Run 

near Lynnwood, Va. 

1,079 75 0 366 311 277 251 230 211 192 173 150 134 119 109 102

01629500 (p) South Fork Shenandoah River at Route 211 near Luray, 

Va. 

1,372 44 0 508 431 386 352 325 300 277 253 225 206 187 176 167

01629500 (r) South Fork Shenandoah River at Route 211 near Luray, 

Va. 

1,372 44 0 378 327 294 271 249 229 209 190 166 148 130 120 111

01629500 (w) South Fork Shenandoah River at Route 211 near Luray, 

Va. 

1,372 44 0 505 429 384 351 323 299 275 252 224 205 186 175 166

01630700 (p) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 4.23 2.41 1.70 1.30 1.04 0.860 0.710 0.590 0.480 0.420 0.380 0.360 0.35001630700 (r) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 6.47 4.77 3.74 2.97 2.34 1.81 1.34 0.907 0.491 0.266 -- -- --01630700 (w) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 4.30 2.48 1.76 1.35 1.07 0.884 0.725 0.597 0.480 0.417 -- -- --01631000 (p) South Fork Shenandoah River below Route 619 at Front 

Royal, Va. 

1,634 76 0 549 468 420 384 355 328 303 278 247 226 206 194 184

01631000 (r) South Fork Shenandoah River below Route 619 at Front 

Royal, Va. 

1,634 76 0 455 395 356 328 303 280 256 233 204 184 162 149 139

01631000 (w) South Fork Shenandoah River below Route 619 at Front 

Royal, Va. 

1,634 76 0 547 466 419 383 354 327 302 277 247 226 205 193 184

01632000 (p) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 11.1 7.38 5.43 4.15 3.21 2.47 1.86 1.32 0.810 0.530 0.330 0.230 0.170

01632000 (r) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 51.1 42.9 37.6 33.8 30.4 27.3 24.3 21.2 17.6 15.0 12.4 11.0 9.81

01632000 (w) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 12.4 8.53 6.46 5.08 4.07 3.24 2.54 1.91 1.29 0.925 0.651 0.504 0.403
Table 4. (7-day averaged, adjusted low flow) 77

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01632082 (p) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 13.1 10.1 8.43 7.26 6.33 5.53 4.80 4.08 3.28 2.76 2.28 2.02 1.8101632082 (r) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 10.1 8.22 7.07 6.22 5.49 4.85 4.21 3.58 2.83 2.33 1.85 1.58 1.3701632082 (w) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 13.0 10.1 8.40 7.24 6.31 5.51 4.79 4.07 3.27 2.75 2.27 2.01 1.8001632900 (p) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 27.2 21.8 18.5 16.1 14.2 12.4 10.8 9.14 7.25 5.97 4.79 4.13 3.6001632900 (r) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 21.6 17.9 15.5 13.8 12.3 10.9 9.59 8.27 6.68 5.60 4.53 3.94 3.4501632900 (w) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 27.0 21.7 18.5 16.1 14.1 12.4 10.8 9.12 7.24 5.96 4.79 4.13 3.6001633000 (p) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 81.1 66.8 56.8 48.5 41.3 34.6 28.2 21.6 14.3 9.76 6.05 4.27 3.04

01633000 (r) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 131 112 99.0 89.9 81.7 74.4 66.9 59.6 50.5 44.1 37.6 33.8 30.7

01633000 (w) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 82.4 68.0 57.8 49.6 42.3 35.6 29.1 22.5 15.1 10.5 6.71 4.86 3.57

01633500 (p) Stony Creek along Route 675 at Columbia Furnace, Va. 77.5 8 0 10.8 9.32 8.44 7.80 7.28 6.83 6.41 5.99 5.51 5.18 4.89 4.72 4.5901633500 (r) Stony Creek along Route 675 at Columbia Furnace, Va. 77.5 8 0 17.7 14.6 12.6 11.2 9.93 8.82 7.73 6.63 5.33 4.44 3.58 3.10 2.7001633500 (w) Stony Creek along Route 675 at Columbia Furnace, Va. 77.5 8 0 11.0 9.43 8.53 7.87 7.33 6.87 6.44 6.00 5.51 5.17 4.87 4.69 4.5601634000 (p) North Fork Shenandoah River at Route 55 near Strasburg, Va. 770 81 0 166 140 124 113 103 93.7 85.0 76.1 65.4 57.9 50.6 46.3 42.801634000 (r) North Fork Shenandoah River at Route 55 near Strasburg, Va. 770 81 0 204 175 156 143 130 119 108 96.9 83.0 73.4 63.2 57.4 52.601634000 (w) North Fork Shenandoah River at Route 55 near Strasburg, Va. 770 81 0 167 141 125 113 103 94.2 85.5 76.5 65.7 58.2 50.8 46.5 42.901634500 (p) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 14.7 12.0 10.4 9.18 8.19 7.30 6.46 5.60 4.60 3.91 3.26 2.89 2.5901634500 (r) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 23.7 19.6 17.0 15.2 13.5 12.0 10.6 9.14 7.40 6.22 5.04 4.39 3.8601634500 (w) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 14.9 12.2 10.5 9.31 8.31 7.40 6.55 5.67 4.66 3.95 3.29 2.92 2.6101635090 (p) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 41.7 31.2 25.7 22.1 19.3 17.1 15.1 13.2 11.2 9.96 8.87 8.28 7.8301635090 (r) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 36.7 30.6 26.8 23.9 21.4 19.2 17.0 14.8 12.1 10.3 8.44 7.42 6.5701635090 (w) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 41.6 31.1 25.7 22.1 19.4 17.1 15.1 13.2 11.2 9.97 8.86 8.26 7.8101635500 (p) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 6.00 4.77 4.02 3.46 3.00 2.60 2.22 1.83 1.40 1.11 0.850 0.710 0.60001635500 (r) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 19.9 16.4 14.2 12.6 11.2 9.99 8.76 7.54 6.08 5.08 4.10 3.56 3.1201635500 (w) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 6.33 5.05 4.26 3.67 3.19 2.77 2.37 1.95 1.50 1.19 0.913 0.763 0.64401636210 (p) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 1.41 1.00 0.780 0.620 0.510 0.410 0.320 0.250 0.170 0.120 0.080 0.060 0.05001636210 (r) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 4.22 3.08 2.39 1.87 1.47 1.12 0.815 0.541 0.284 0.148 -- -- --01636210 (w) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 1.49 1.06 0.823 0.653 0.534 0.427 0.331 0.256 0.172 0.120 -- -- --01636266 (p) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 3.24 1.81 1.27 0.980 0.790 0.660 0.560 0.480 0.410 0.380 0.350 0.340 0.34001636266 (r) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 1.50 1.06 0.802 0.614 0.468 0.347 0.244 0.154 0.075 0.036 -- -- --01636266 (w) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 3.15 1.77 1.25 0.963 0.776 0.647 0.548 0.468 0.399 0.370 -- -- --01636316 (p) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 21.8 16.9 14.4 12.7 11.4 10.3 9.32 8.43 7.48 6.88 6.37 6.11 5.9101636316 (r) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 6.79 5.01 3.93 3.12 2.47 1.91 1.42 0.961 0.523 0.284 -- -- --01636316 (w) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 21.4 16.6 14.1 12.4 11.2 10.1 9.18 8.30 7.38 6.79 -- -- --01638350 (p) South Fork Catoctin Creek at Route 698 near Waterford, 

Va. 

31.6 5 0 11.7 5.41 3.15 2.00 1.32 0.880 0.580 0.360 0.190 0.110 0.060 0.040 0.030

01638350 (r) South Fork Catoctin Creek at Route 698 near Waterford, 

Va. 

31.6 5 0 10.5 7.85 6.22 5.00 4.00 3.13 2.36 1.63 0.916 0.516 -- -- --

01638350 (w) South Fork Catoctin Creek at Route 698 near Waterford, 

Va. 

31.6 5 0 11.6 5.56 3.33 2.17 1.47 0.997 0.665 0.419 0.219 0.125 -- -- --
78 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01638420 (p) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 6.62 3.04 1.68 0.980 0.570 0.310 0.130 0.000 0.000 0.000 0.000 0.000 0.000

01638420 (r) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 7.39 5.47 4.30 3.43 2.72 2.11 1.57 1.07 0.583 0.319 -- -- --

01638420 (w) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 1 6.68 3.21 1.86 1.14 0.704 0.416 0.208 0.056 0.026 0.013 -- -- --

01638480 (p) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 18.6 12.3 8.78 6.41 4.66 3.31 2.24 1.36 0.640 0.320 0.140 0.070 0.04001638480 (r) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 33.7 26.0 21.2 17.5 14.4 11.7 9.15 6.68 4.11 2.55 -- -- --01638480 (w) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 19.3 12.9 9.32 6.88 5.05 3.63 2.48 1.54 0.739 0.380 -- -- --01643590 (p) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 3.32 2.23 1.71 1.39 1.16 0.980 0.830 0.690 0.560 0.470 0.410 0.370 0.34001643590 (r) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 2.22 1.59 1.21 0.938 0.722 0.541 0.386 0.248 0.124 0.061 -- -- --01643590 (w) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 3.29 2.21 1.70 1.38 1.15 0.971 0.821 0.681 0.553 0.464 -- -- --01643700 (p) Goose Creek at Route 611 near Middleburg, Va. 122 32 1 26.9 16.3 10.1 6.20 3.62 1.94 0.890 0.300 0.040 0.000 0.000 0.000 0.00001643700 (r) Goose Creek at Route 611 near Middleburg, Va. 122 32 1 47.6 37.1 30.5 25.4 21.1 17.3 13.7 10.2 6.42 4.11 -- -- --01643700 (w) Goose Creek at Route 611 near Middleburg, Va. 122 32 1 31.9 21.1 14.6 10.4 7.27 4.97 3.27 2.08 1.03 0.602 -- -- --01643805 (p) North Fork Goose Creek at Route 729 near Lincoln, Va. 38.1 4 0 17.6 9.08 5.88 4.16 3.08 2.32 1.75 1.29 0.890 0.680 0.520 0.440 0.39001643805 (r) North Fork Goose Creek at Route 729 near Lincoln, Va. 38.1 4 0 12.9 9.73 7.76 6.26 5.03 3.97 3.01 2.10 1.20 0.688 -- -- --01643805 (w) North Fork Goose Creek at Route 729 near Lincoln, Va. 38.1 4 0 17.4 9.11 5.95 4.24 3.15 2.37 1.79 1.31 0.897 0.680 -- -- --01643880 (p) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 14.6 3.19 1.08 0.430 0.180 0.070 0.020 0.000 0.000 0.000 0.000 0.000 0.00001643880 (r) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 16.4 12.4 9.98 8.10 6.55 5.20 3.97 2.81 1.63 0.956 -- -- --01643880 (w) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 1 15.5 7.27 4.87 3.66 2.78 2.08 1.50 1.03 0.532 0.296 -- -- --01644000 (p) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 50.5 29.9 20.3 14.4 10.4 7.45 5.17 3.34 1.79 1.05 0.570 0.370 0.25001644000 (r) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 146 117 99.2 84.8 72.5 61.2 50.5 39.5 27.2 19.1 -- -- --01644000 (w) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 54.9 33.7 23.5 17.3 12.8 9.39 6.68 4.51 2.48 1.51 -- -- --01644280 (p) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 13.0 8.40 6.27 4.96 4.03 3.31 2.72 2.20 1.68 1.37 1.12 0.990 0.90001644280 (r) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 13.2 9.15 7.49 6.21 -- -- -- -- -- -- -- -- --01644280 (w) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 13.0 8.44 6.33 5.02 -- -- -- -- -- -- -- -- --01644291 (p) Stave Run below Parking Lot Road near Reston, Va. 0.085 10 9 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00001644291 (r) Stave Run below Parking Lot Road near Reston, Va. 0.085 10 9 0.068 0.049 0.038 0.029 0.023 0.017 0.012 0.008 0.004 0.002 -- -- --01644291 (w) Stave Run below Parking Lot Road near Reston, Va. 0.085 10 9 0.005 0.004 0.003 0.002 0.002 0.001 0.001 0.000 0.000 0.000 -- -- --01644295 (p) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 4 0.030 0.010 0.010 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00001644295 (r) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 4 0.216 0.159 0.124 0.098 0.077 0.058 0.043 0.028 0.014 0.007 -- -- --01644295 (w) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 4 0.044 0.021 0.018 0.016 0.005 0.004 0.003 0.001 0.001 0.000 -- -- --01645784 (p) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 21.0 17.9 15.3 13.0 10.8 8.76 6.75 4.74 2.64 1.49 0.700 0.400 0.22001645784 (r) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 0.457 0.340 0.267 0.212 0.168 0.129 0.095 0.063 0.033 0.017 -- -- --01645784 (w) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 20.2 17.2 14.7 12.5 10.5 8.48 6.55 4.59 2.56 1.45 -- -- --01646000 (p) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 21.0 17.9 15.3 13.0 10.8 8.76 6.75 4.74 2.64 1.49 0.700 0.400 0.22001646000 (r) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 18.1 14.2 11.6 9.58 7.93 6.44 5.04 3.66 2.21 1.36 -- -- --01646000 (w) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 20.9 17.7 15.1 12.8 10.7 8.69 6.70 4.71 2.63 1.49 -- -- --01652500 (p) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 3.68 2.98 2.56 2.26 2.01 1.80 1.59 1.38 1.15 0.980 0.830 0.740 0.67001652500 (r) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 2.72 1.85 1.34 0.978 0.707 0.490 -- -- -- -- -- -- --01652500 (w) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 3.59 2.88 2.45 2.15 1.91 1.71 -- -- -- -- -- -- --01653000 (p) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 6.37 5.08 4.32 3.77 3.32 2.92 2.55 2.18 1.76 1.48 1.21 1.06 0.95001653000 (r) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 6.53 4.39 3.17 2.31 1.67 1.15 -- -- -- -- -- -- --01653000 (w) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 6.39 5.02 4.22 3.65 3.19 2.80 -- -- -- -- -- -- --01654000 (p) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 1 5.24 4.69 4.07 3.40 2.73 2.06 1.41 0.800 0.270 0.070 0.000 0.000 0.00001654000 (r) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 1 8.50 6.57 5.34 4.38 3.59 2.88 2.23 1.59 0.927 0.556 -- -- --01654000 (w) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 1 5.43 4.80 4.14 3.45 2.77 2.10 1.45 0.837 0.298 0.089 -- -- --
Table 4. (7-day averaged, adjusted low flow) 79

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01654500 (p) Long Branch (Little Run) at Route 620 near Annandale, 

Va. 

3.72 8 1 1.66 1.49 1.29 1.06 0.820 0.580 0.340 0.120 0.000 0.000 0.000 0.000 0.000

01654500 (r) Long Branch (Little Run) at Route 620 near Annandale, 

Va. 

3.72 8 1 1.73 1.31 1.04 0.839 0.675 0.529 0.399 0.274 0.150 0.084 -- -- --

01654500 (w) Long Branch (Little Run) at Route 620 near Annandale, 

Va. 

3.72 8 1 1.66 1.48 1.28 1.05 0.814 0.578 0.342 0.126 0.006 0.003 -- -- --

01655000 (p) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 9.53 6.76 5.17 4.05 3.18 2.48 1.86 1.31 0.780 0.490 0.280 0.190 0.130

01655000 (r) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 7.07 4.75 3.43 2.50 1.80 1.24 -- -- -- -- -- -- --

01655000 (w) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 9.22 6.51 4.97 3.88 3.03 2.36 -- -- -- -- -- -- --

01655500 (p) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 1 1.81 1.25 0.940 0.710 0.540 0.400 0.280 0.180 0.090 0.040 0.000 0.000 0.00001655500 (r) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 1 3.92 2.85 2.21 1.73 1.35 1.03 0.748 0.494 0.258 0.134 -- -- --01655500 (w) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 1 1.89 1.31 0.983 0.744 0.566 0.419 0.293 0.188 0.094 0.042 -- -- --01656000 (p) Cedar Run at Route 806 near Catlett, Va. 93.4 51 7 4.61 2.90 1.95 1.32 0.870 0.540 0.280 0.090 0.000 0.000 0.000 0.000 0.00001656000 (r) Cedar Run at Route 806 near Catlett, Va. 93.4 51 7 16.8 11.8 9.66 8.02 -- -- -- -- -- -- -- -- --01656000 (w) Cedar Run at Route 806 near Catlett, Va. 93.4 51 7 5.79 3.74 2.65 1.91 -- -- -- -- -- -- -- -- --01656100 (p) Cedar Run at Route 611 near Aden, Va. 155 15 0 7.95 4.86 3.44 2.58 1.98 1.53 1.17 0.850 0.560 0.400 0.280 0.220 0.18001656100 (r) Cedar Run at Route 611 near Aden, Va. 155 15 0 30.5 22.0 18.1 15.1 -- -- -- -- -- -- -- -- --01656100 (w) Cedar Run at Route 611 near Aden, Va. 155 15 0 9.36 5.90 4.30 3.28 -- -- -- -- -- -- -- -- --01656120 (p) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656120 (r) Cedar Run at Route 646 near Aden, Va. 175 2 0 35.2 25.6 21.1 17.6 -- -- -- -- -- -- -- -- --01656120 (w) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656500 (p) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 8.89 6.39 4.96 3.95 3.16 2.51 1.94 1.41 0.890 0.590 0.370 0.260 0.19001656500 (r) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 17.6 13.4 10.7 8.72 7.07 5.62 4.31 3.05 1.79 1.05 -- -- --01656500 (w) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 9.16 6.60 5.12 4.08 3.26 2.59 1.99 1.45 0.907 0.598 -- -- --01656650 (p) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 14.0 8.96 6.62 5.17 4.14 3.35 2.69 2.11 1.54 1.21 0.940 0.810 0.70001656650 (r) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 33.7 26.0 21.2 17.5 14.4 11.7 9.16 6.69 4.11 2.56 -- -- --01656650 (w) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 14.6 9.46 7.02 5.50 4.40 3.55 2.83 2.21 1.59 1.23 -- -- --01656700 (p) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 19.3 13.8 10.4 8.01 6.10 4.54 3.22 2.08 1.05 0.560 0.260 0.150 0.080

01656700 (r) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 77.7 58.7 48.7 40.7 -- -- -- -- -- -- -- -- --

01656700 (w) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 23.4 16.9 13.0 10.1 -- -- -- -- -- -- -- -- --

01656725 (p) Bull Run at Route 705 near Catharpin, Va. 25.7 16 4 1.68 0.820 0.450 0.250 0.130 0.060 0.010 0.000 0.000 0.000 0.000 0.000 0.00001656725 (r) Bull Run at Route 705 near Catharpin, Va. 25.7 16 4 3.69 2.40 1.94 1.60 -- -- -- -- -- -- -- -- --01656725 (w) Bull Run at Route 705 near Catharpin, Va. 25.7 16 4 1.98 1.05 0.661 0.434 -- -- -- -- -- -- -- -- --01656960 (p) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 5.66 3.82 2.79 2.10 1.58 1.16 0.830 0.540 0.280 0.160 0.080 0.050 0.03001656960 (r) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 8.02 5.41 4.41 3.65 -- -- -- -- -- -- -- -- --01656960 (w) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 5.83 3.93 2.90 2.20 -- -- -- -- -- -- -- -- --01657000 (p) Bull Run at Route 616 near Manassas, Va. 146 30 0 7.95 5.00 3.54 2.62 1.96 1.46 1.06 0.720 0.410 0.260 0.150 0.100 0.07001657000 (r) Bull Run at Route 616 near Manassas, Va. 146 30 0 28.5 20.5 16.8 14.0 -- -- -- -- -- -- -- -- --01657000 (w) Bull Run at Route 616 near Manassas, Va. 146 30 0 9.37 6.04 4.40 3.33 -- -- -- -- -- -- -- -- --01657020 (p) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01657020 (r) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 28.7 20.6 17.0 14.1 -- -- -- -- -- -- -- -- --01657020 (w) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --
80 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01657415 (p) Bull Run above Yates Ford near Clifton, Va. 185 11 0 22.6 17.3 14.5 12.7 11.3 10.2 9.22 8.30 7.32 6.71 6.19 5.93 5.7201657415 (r) Bull Run above Yates Ford near Clifton, Va. 185 11 0 37.6 27.4 22.6 18.8 -- -- -- -- -- -- -- -- --01657415 (w) Bull Run above Yates Ford near Clifton, Va. 185 11 0 23.2 17.7 14.9 13.0 -- -- -- -- -- -- -- -- --01657500 (p) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 49.1 45.0 40.7 36.2 31.6 26.7 21.5 15.7 9.18 5.29 2.51 1.40 0.780

01657500 (r) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 141 110 91.5 76.8 -- -- -- -- -- -- -- -- --

01657500 (w) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 53.8 48.2 43.1 38.1 -- -- -- -- -- -- -- -- --

01657655 (p) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.460 0.240 0.150 0.100 0.070 0.050 0.030 0.020 0.010 0.010 0.000 0.000 0.00001657655 (r) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.969 0.666 0.485 0.354 0.256 0.180 -- -- -- -- -- -- --01657655 (w) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 0.560 0.321 0.211 0.145 0.101 0.069 -- -- -- -- -- -- --01658500 (p) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 13 0.560 0.340 0.220 0.150 0.090 0.050 0.020 0.000 0.000 0.000 0.000 0.000 0.00001658500 (r) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 13 3.19 2.43 1.96 1.59 1.29 1.02 0.774 0.539 0.302 0.174 -- -- --01658500 (w) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 13 0.720 0.461 0.316 0.226 0.150 0.098 0.054 0.026 0.013 0.007 -- -- --01658698 (p) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01658698 (r) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 1.04 0.781 0.620 0.496 0.397 0.309 0.231 0.157 0.084 0.046 -- -- --01658698 (w) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01659000 (p) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 2 0.510 0.350 0.250 0.170 0.110 0.060 0.020 0.000 0.000 0.000 0.000 0.000 0.000

01659000 (r) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 2 2.48 1.89 1.51 1.22 0.989 0.780 0.591 0.409 0.227 0.130 -- -- --

01659000 (w) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 2 0.618 0.431 0.313 0.220 0.150 0.092 0.044 0.018 0.009 0.005 -- -- --

01660000 (p) South Branch Chopawamsic Creek below Marine Road 

1 near Garrisonville, Va. 

2.46 8 0 0.430 0.320 0.250 0.200 0.160 0.120 0.090 0.060 0.030 0.020 0.010 0.010 0.000

01660000 (r) South Branch Chopawamsic Creek below Marine Road 

1 near Garrisonville, Va. 

2.46 8 0 1.21 0.911 0.725 0.581 0.466 0.363 0.272 0.185 0.100 0.055 -- -- --

01660000 (w) South Branch Chopawamsic Creek below Marine Road 

1 near Garrisonville, Va. 

2.46 8 0 0.464 0.344 0.269 0.214 0.171 0.129 0.096 0.064 0.032 0.021 -- -- --

01660100 (p) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 4.02 1.83 0.950 0.500 0.250 0.110 0.030 0.000 0.000 0.000 0.000 0.000 0.00001660100 (r) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 4.47 3.02 2.19 1.59 1.15 0.794 -- -- -- -- -- -- --01660100 (w) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 1 4.21 2.32 1.44 0.923 0.585 0.342 -- -- -- -- -- -- --01660400 (p) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 0 6.45 3.08 1.74 1.04 0.630 0.370 0.200 0.100 0.030 0.010 0.000 0.000 0.00001660400 (r) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 0 11.8 9.16 7.46 6.14 5.05 4.08 3.17 2.28 1.35 0.819 -- -- --01660400 (w) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 0 7.29 4.00 2.57 1.75 1.21 0.854 0.561 0.378 0.187 0.099 -- -- --01660500 (p) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 1.74 1.21 0.880 0.640 0.460 0.320 0.200 0.110 0.050 0.020 0.010 0.000 0.000

01660500 (r) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 5.11 3.92 3.17 2.58 2.11 1.68 1.29 0.906 0.518 0.304 -- -- --

01660500 (w) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 1.99 1.40 1.03 0.764 0.559 0.401 0.260 0.156 0.075 0.034 -- -- --
Table 4. (7-day averaged, adjusted low flow) 81

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01661800 (p) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.98 1.48 1.14 0.890 0.670 0.490 0.340 0.200 0.070 0.000 0.000 0.000 0.00001661800 (r) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.57 1.07 0.781 0.570 0.412 0.287 -- -- -- -- -- -- --01661800 (w) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 1 1.92 1.42 1.09 0.849 0.639 0.468 -- -- -- -- -- -- --01661900 (p) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 5.74 3.52 2.56 1.98 1.58 1.28 1.04 0.830 0.630 0.510 0.420 0.370 0.34001661900 (r) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 6.43 4.74 3.72 2.95 2.33 1.80 1.33 0.901 0.488 0.264 -- -- --01661900 (w) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 5.76 3.56 2.59 2.01 1.60 1.29 1.05 0.832 0.627 0.506 -- -- --01662000 (p) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 47.3 31.6 22.8 16.9 12.5 9.08 6.30 3.99 1.99 1.07 0.500 0.290 0.17001662000 (r) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 80.5 63.6 53.0 44.7 37.6 31.2 25.2 19.2 12.6 8.44 -- -- --01662000 (w) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 48.8 32.9 24.0 18.0 13.4 9.84 6.90 4.46 2.26 1.25 -- -- --01662500 (p) Rush River at old Route 522 at Washington, Va. 14.6 23 5 1.11 0.770 0.570 0.440 0.330 0.230 0.140 0.000 0.000 0.000 0.000 0.000 0.00001662500 (r) Rush River at old Route 522 at Washington, Va. 14.6 23 5 4.42 3.23 2.51 1.97 1.54 1.18 0.861 0.572 0.301 0.158 -- -- --01662500 (w) Rush River at old Route 522 at Washington, Va. 14.6 23 5 1.21 0.841 0.623 0.481 0.361 0.252 0.156 0.012 0.005 0.003 -- -- --01662800 (p) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 6.93 4.54 3.26 2.41 1.79 1.30 0.910 0.570 0.280 0.130 0.000 0.000 0.00001662800 (r) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 8.37 6.21 4.90 3.91 3.11 2.42 1.81 1.24 0.684 0.378 -- -- --01662800 (w) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 1 6.99 4.60 3.32 2.46 1.83 1.34 0.937 0.589 0.290 0.136 -- -- --01663000 (p) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 54.6 35.1 24.9 18.3 13.5 9.76 6.81 4.37 2.27 1.27 0.630 0.390 0.24001663000 (r) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 55.1 43.1 35.6 29.7 24.8 20.4 16.2 12.1 7.75 5.02 -- -- --01663000 (w) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 54.7 35.5 25.3 18.7 13.9 10.1 7.11 4.61 2.41 1.36 -- -- --01663500 (p) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 95.1 63.1 46.0 34.5 26.1 19.5 14.0 9.39 5.19 3.08 1.66 1.07 0.71001663500 (r) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 123 98.4 82.9 70.6 60.0 50.5 41.4 32.1 21.8 15.1 -- -- --01663500 (w) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 96.2 64.4 47.2 35.8 27.2 20.4 14.8 10.0 5.57 3.34 -- -- --01664000 (p) Rappahannock River at Route 29 (Alternate) at Remington, Va. 619 64 0 179 116 83.5 62.6 47.4 35.7 26.1 17.9 10.4 6.52 3.78 2.60 1.8301664000 (r) Rappahannock River at Route 29 (Alternate) at Remington, Va. 619 64 0 293 240 206 180 156 134 114 91.8 66.7 49.7 -- -- --01664000 (w) Rappahannock River at Route 29 (Alternate) at Remington, Va. 619 64 0 184 120 87.6 66.4 50.8 38.5 28.4 19.8 11.6 7.40 -- -- --01664500 (p) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 189 155 126 101 79.0 59.2 41.2 25.1 10.9 4.79 1.61 0.700 0.310

01664500 (r) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 305 250 215 187 163 141 119 96.2 70.1 52.4 -- -- --

01664500 (w) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 195 158 129 104 82.1 62.0 43.7 27.3 12.5 5.94 -- -- --

01665000 (p) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 4.27 3.64 3.14 2.70 2.30 1.91 1.53 1.14 0.700 0.440 0.240 0.150 0.10001665000 (r) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 4.94 3.61 2.81 2.22 1.74 1.33 0.978 0.654 0.347 0.183 -- -- --01665000 (w) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 4.29 3.64 3.13 2.69 2.29 1.90 1.52 1.13 0.694 0.436 -- -- --01665500 (p) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 41.1 30.0 23.5 18.7 15.0 11.9 9.12 6.57 4.04 2.61 1.55 1.07 0.75001665500 (r) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 44.6 34.7 28.5 23.7 19.6 16.0 12.7 9.38 5.89 3.75 -- -- --01665500 (w) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 41.2 30.2 23.6 18.9 15.1 12.0 9.20 6.63 4.07 2.63 -- -- --01666500 (p) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 81.3 61.1 48.7 39.5 32.1 25.8 20.1 14.7 9.16 6.01 3.60 2.50 1.76

01666500 (r) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 36.2 26.3 21.7 18.1 -- -- -- -- -- -- -- -- --

01666500 (w) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 79.9 60.1 48.0 39.0 -- -- -- -- -- -- -- -- --

01667000 (p) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 106 76.6 63.5 55.6 50.0 45.9 42.6 39.8 37.5 36.4 35.8 35.7 35.701667000 (r) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 106 80.9 67.3 56.3 -- -- -- -- -- -- -- -- --01667000 (w) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 106 76.7 63.6 55.6 -- -- -- -- -- -- -- -- --
82 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01667500 (p) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 173 136 110 90.1 72.9 57.8 43.9 30.7 17.6 10.4 5.36 3.30 2.0501667500 (r) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 112 86.1 71.6 60.0 -- -- -- -- -- -- -- -- --01667500 (w) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 171 134 109 89.2 -- -- -- -- -- -- -- -- --01667870 (p) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01667870 (r) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 5.65 3.81 2.75 2.01 1.45 0.997 -- -- -- -- -- -- --01667870 (w) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01668000 (p) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 433 342 278 228 185 148 113 79.4 45.8 27.3 14.2 8.83 5.53

01668000 (r) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 196 127 90.4 65.6 47.2 31.3 -- -- -- -- -- -- --

01668000 (w) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 426 335 273 224 182 145 -- -- -- -- -- -- --

01668500 (p) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 2 9.09 5.79 3.99 2.80 1.94 1.30 0.810 0.430 0.140 0.030 0.000 0.000 0.00001668500 (r) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 2 8.48 5.69 4.10 2.99 2.16 1.48 -- -- -- -- -- -- --01668500 (w) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 2 8.97 5.77 4.01 2.83 1.98 1.33 -- -- -- -- -- -- --01668800 (p) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 7.18 5.07 3.89 3.08 2.46 1.95 1.51 1.11 0.710 0.480 0.300 0.220 0.16001668800 (r) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 3.25 2.20 1.60 1.16 0.841 0.582 -- -- -- -- -- -- --01668800 (w) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 6.70 4.73 3.63 2.88 2.30 1.83 -- -- -- -- -- -- --01669000 (p) Piscataway Creek at Route 691 near Tappahannock, Va. 27.9 55 1 10.7 7.92 6.07 4.67 3.54 2.60 1.80 1.10 0.480 0.190 0.010 0.000 0.00001669000 (r) Piscataway Creek at Route 691 near Tappahannock, Va. 27.9 55 1 5.49 3.70 2.68 1.95 1.41 0.970 -- -- -- -- -- -- --01669000 (w) Piscataway Creek at Route 691 near Tappahannock, Va. 27.9 55 1 9.93 7.29 5.59 4.30 3.27 2.41 -- -- -- -- -- -- --01669500 (p) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 19.1 10.9 7.19 5.00 3.53 2.45 1.62 0.940 0.280 0.000 0.000 0.000 0.00001669500 (r) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 14.9 9.90 7.13 5.19 3.74 2.55 -- -- -- -- -- -- --01669500 (w) Dragon Swamp at Route 602 near Church View, Va. 86 37 3 18.4 10.7 7.18 5.03 3.56 2.46 -- -- -- -- -- -- --01669520 (p) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 33.4 15.2 8.26 4.79 2.80 1.60 0.840 0.370 0.090 0.010 0.000 0.000 0.00001669520 (r) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 18.3 12.2 8.76 6.38 4.60 3.13 -- -- -- -- -- -- --01669520 (w) Dragon Swamp at Route 603 at Mascot, Va. 109 25 1 27.6 14.0 8.44 5.34 3.40 2.06 -- -- -- -- -- -- --01670000 (p) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 3 1.57 1.13 0.850 0.640 0.470 0.330 0.210 0.110 0.020 0.000 0.000 0.000 0.00001670000 (r) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 3 1.65 1.13 0.819 0.598 0.432 0.301 -- -- -- -- -- -- --01670000 (w) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 3 1.58 1.13 0.845 0.634 0.465 0.327 -- -- -- -- -- -- --01670180 (p) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670180 (r) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670180 (w) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670300 (p) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 0.910 0.570 0.410 0.300 0.230 0.170 0.130 0.090 0.050 0.040 0.020 0.020 0.01001670300 (r) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 2.44 1.86 1.49 1.20 0.972 0.766 0.581 0.401 0.223 0.127 -- -- --01670300 (w) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 0.982 0.628 0.456 0.337 0.259 0.193 0.146 0.102 0.056 0.043 -- -- --01670400 (p) North Anna River at Route 601 near Partlow, Va. 342 16 0 48.1 46.1 44.8 43.9 43.1 42.3 41.7 40.9 40.1 39.5 39.0 38.7 38.501670400 (r) North Anna River at Route 601 near Partlow, Va. 342 16 0 83.1 66.4 55.2 46.5 39.1 32.5 26.0 19.6 12.6 8.28 -- -- --01670400 (w) North Anna River at Route 601 near Partlow, Va. 342 16 0 49.0 46.6 45.1 43.9 43.0 42.1 41.3 40.5 39.5 38.9 -- -- --01671000 (p) North Anna River near Doswell, Va. 440 56 0 87.9 72.8 61.2 51.5 42.7 34.5 26.7 19.0 10.9 6.44 3.25 1.95 1.1801671000 (r) North Anna River near Doswell, Va. 440 56 0 62.9 41.2 29.5 21.4 15.4 10.4 -- -- -- -- -- -- --01671000 (w) North Anna River near Doswell, Va. 440 56 0 84.9 69.2 57.8 48.4 40.0 32.4 -- -- -- -- -- -- --
Table 4. (7-day averaged, adjusted low flow) 83

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

01671020 (p) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 75.2 64.8 58.8 54.4 50.9 47.8 45.0 42.2 38.9 36.8 34.8 33.7 32.9

01671020 (r) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 108 86.2 71.9 60.7 51.3 42.8 34.4 26.1 16.9 11.2 -- -- --

01671020 (w) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 76.2 65.4 59.1 54.6 50.9 47.7 44.8 41.8 38.5 36.3 -- -- --

01671100 (p) Little River at Route 685 near Doswell, Va. 107 43 0 15.5 9.47 6.51 4.67 3.39 2.43 1.68 1.07 0.560 0.320 0.160 0.100 0.07001671100 (r) Little River at Route 685 near Doswell, Va. 107 43 0 18.0 12.0 8.62 6.27 4.52 3.08 -- -- -- -- -- -- --01671100 (w) Little River at Route 685 near Doswell, Va. 107 43 0 15.9 9.88 6.84 4.91 3.55 2.51 -- -- -- -- -- -- --01671500 (p) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 10 0.760 0.540 0.390 0.270 0.170 0.070 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01671500 (r) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 10 1.97 1.49 1.19 0.962 0.775 0.609 0.460 0.317 0.174 0.098 -- -- --

01671500 (w) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 10 0.812 0.579 0.422 0.296 0.191 0.089 0.015 0.011 0.005 0.003 -- -- --

01672000 (p) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672000 (r) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672000 (w) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672500 (p) South Anna River at Route 54 near Ashland, Va. 395 68 0 80.6 61.0 49.1 40.2 33.1 26.9 21.3 16.0 10.4 7.10 4.48 3.24 2.3801672500 (r) South Anna River at Route 54 near Ashland, Va. 395 68 0 94.0 75.2 62.6 52.8 44.5 37.1 29.7 22.5 14.5 9.58 -- -- --01672500 (w) South Anna River at Route 54 near Ashland, Va. 395 68 0 81.0 61.5 49.5 40.6 33.4 27.2 21.5 16.2 10.5 7.16 -- -- --01673000 (p) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 212 167 139 118 101 85.4 71.0 56.5 40.5 30.3 21.4 16.8 13.301673000 (r) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 139 90.3 64.3 46.7 33.6 22.4 -- -- -- -- -- -- --01673000 (w) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 204 160 132 112 95.1 80.7 -- -- -- -- -- -- --01673500 (p) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 0 0.680 0.440 0.330 0.250 0.200 0.150 0.120 0.090 0.060 0.040 0.030 0.020 0.02001673500 (r) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 0 1.36 0.934 0.680 0.496 0.359 0.251 -- -- -- -- -- -- --01673500 (w) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 0 0.766 0.500 0.370 0.277 0.217 0.159 -- -- -- -- -- -- --01673550 (p) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 9.99 6.84 5.03 3.77 2.82 2.05 1.42 0.870 0.380 0.120 0.000 0.000 0.00001673550 (r) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 5.07 3.42 2.48 1.80 1.30 0.898 -- -- -- -- -- -- --01673550 (w) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 1 9.26 6.35 4.68 3.51 2.63 1.92 -- -- -- -- -- -- --01673638 (p) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 7.07 4.34 2.76 1.73 1.03 0.540 0.220 0.040 0.000 0.000 0.000 0.000 0.00001673638 (r) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 1.98 1.35 0.982 0.716 0.518 0.360 -- -- -- -- -- -- --01673638 (w) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 5.45 3.41 2.23 1.44 0.889 0.496 -- -- -- -- -- -- --01673800 (p) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 7.59 4.22 2.72 1.85 1.27 0.870 0.570 0.340 0.150 0.070 0.000 0.000 0.00001673800 (r) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 23.3 18.3 15.0 12.5 10.3 8.43 6.61 4.83 2.94 1.84 -- -- --01673800 (w) Po River at Route 208 near Spotsylvania, Va. 77.6 44 1 8.65 5.12 3.47 2.47 1.77 1.28 0.877 0.581 0.288 0.151 -- -- --01674000 (p) Mattaponi River above Route 605 near Bowling Green, 

Va. 

256 63 2 29.4 19.2 13.1 9.03 6.06 3.87 2.24 1.06 0.280 0.040 0.000 0.000 0.000

01674000 (r) Mattaponi River above Route 605 near Bowling Green, 

Va. 

256 63 2 39.0 25.7 18.4 13.4 9.65 6.51 -- -- -- -- -- -- --

01674000 (w) Mattaponi River above Route 605 near Bowling Green, 

Va. 

256 63 2 31.9 20.8 14.4 10.0 6.85 4.39 -- -- -- -- -- -- --

01674500 (p) Mattaponi River near Beulahville, Va. 602 62 0 121 94.4 75.2 59.8 46.8 35.5 25.4 16.3 7.96 4.00 1.66 0.860 0.45001674500 (r) Mattaponi River near Beulahville, Va. 602 62 0 83.0 54.2 38.7 28.1 20.3 13.6 -- -- -- -- -- -- --01674500 (w) Mattaponi River near Beulahville, Va. 602 62 0 116 88.8 70.3 55.7 43.6 33.1 -- -- -- -- -- -- --01677000 (p) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 2.54 1.78 1.35 1.05 0.820 0.630 0.460 0.300 0.130 0.000 0.000 0.000 0.00001677000 (r) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 1.47 1.01 0.733 0.535 0.387 0.270 -- -- -- -- -- -- --01677000 (w) Ware Creek at Route 600 near Toano, Va. 6.29 14 1 2.41 1.69 1.28 0.995 0.776 0.598 -- -- -- -- -- -- --
84 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02011400 (p) Jackson River along Route 603 near Bacova, Va. 157 31 0 39.7 33.5 29.8 27.1 24.9 22.9 21.0 19.0 16.8 15.2 13.7 12.8 12.102011400 (r) Jackson River along Route 603 near Bacova, Va. 157 31 0 37.5 31.3 27.3 24.4 21.9 19.6 17.4 15.1 12.4 10.5 8.65 7.60 6.7302011400 (w) Jackson River along Route 603 near Bacova, Va. 157 31 0 39.7 33.5 29.8 27.0 24.8 22.8 20.9 19.0 16.7 15.1 13.6 12.7 12.002011460 (p) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 8.86 6.67 5.47 4.64 4.00 3.46 2.97 2.51 2.00 1.67 1.37 1.21 1.0902011460 (r) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 13.7 11.2 9.68 8.55 7.58 6.71 5.86 5.01 3.99 3.31 2.65 2.28 1.9802011460 (w) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 8.98 6.78 5.57 4.73 4.08 3.53 3.03 2.56 2.04 1.70 1.39 1.23 1.1102011470 (p) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 14.8 14.8 14.6 14.2 13.5 12.7 11.5 9.73 7.03 4.86 2.83 1.81 1.1302011470 (r) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 17.2 14.2 12.3 10.9 9.66 8.58 7.51 6.44 5.17 4.31 3.47 3.00 2.6202011470 (w) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 14.9 14.8 14.5 14.1 13.5 12.6 11.4 9.66 6.99 4.85 2.84 1.83 1.1502011480 (p) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 12.8 9.48 7.69 6.45 5.49 4.68 3.95 3.26 2.51 2.03 1.61 1.38 1.2102011480 (r) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 20.4 16.8 14.6 13.0 11.5 10.3 9.01 7.76 6.25 5.23 4.23 3.67 3.2102011480 (w) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 12.9 9.66 7.86 6.60 5.63 4.81 4.07 3.36 2.59 2.10 1.66 1.42 1.2502011490 (p) Little Back Creek near Sunrise, Va. 4.9 21 0 3.05 2.81 2.64 2.49 2.36 2.22 2.09 1.93 1.72 1.55 1.37 1.26 1.1702011490 (r) Little Back Creek near Sunrise, Va. 4.9 21 0 0.931 0.732 0.612 0.523 0.449 0.385 0.325 0.264 0.196 0.153 0.113 0.093 0.07602011490 (w) Little Back Creek near Sunrise, Va. 4.9 21 0 3.00 2.77 2.60 2.45 2.32 2.18 2.06 1.90 1.69 1.53 1.35 1.24 1.1502011500 (p) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 23.4 18.7 15.7 13.4 11.4 9.72 8.10 6.47 4.64 3.46 2.43 1.90 1.5002011500 (r) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 31.7 26.3 23.0 20.5 18.3 16.4 14.5 12.6 10.3 8.67 7.10 6.22 5.4902011500 (w) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 23.6 18.8 15.8 13.5 11.6 9.88 8.25 6.61 4.76 3.57 2.52 1.98 1.5702011800 (p) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 187 171 157 146 134 123 110 95.8 76.9 62.5 48.1 39.7 32.9

02011800 (r) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 86.8 73.4 64.8 58.5 53.0 48.0 42.9 37.9 31.8 27.5 23.2 20.7 18.6

02011800 (w) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 185 169 155 144 132 121 109 94.6 76.0 61.9 47.7 39.4 32.7

02011950 (p) Johnson Spring near Hot Springs, Va. -- 6 0 0.580 0.540 0.510 0.490 0.470 0.450 0.430 0.410 0.390 0.370 0.350 0.340 0.32002011950 (r) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02011950 (w) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02012000 (p) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 8.97 7.87 7.27 6.85 6.52 6.24 6.00 5.77 5.54 5.40 5.29 5.24 5.21

02012000 (r) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 2.25 1.79 1.51 1.31 1.14 0.984 0.838 0.693 0.527 0.419 0.318 0.265 0.222

02012000 (w) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 8.83 7.74 7.15 6.74 6.41 6.13 5.90 5.67 5.45 5.31 5.21 5.16 5.13

02012500 (p) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 115 101 92.9 86.7 81.7 77.2 72.9 68.6 63.5 60.1 56.8 54.9 53.402012500 (r) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 104 88.4 78.3 70.9 64.3 58.3 52.3 46.4 39.1 34.0 28.7 25.8 23.302012500 (w) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 115 101 92.6 86.4 81.3 76.8 72.5 68.1 63.1 59.6 56.3 54.5 52.902013000 (p) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 23.6 20.4 18.4 16.9 15.6 14.5 13.4 12.2 10.8 9.81 8.84 8.27 7.7902013000 (r) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 38.8 32.4 28.3 25.3 22.7 20.4 18.0 15.7 12.9 10.9 9.00 7.91 7.0102013000 (w) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 23.9 20.6 18.6 17.0 15.7 14.6 13.4 12.3 10.8 9.83 8.84 8.26 7.7802013100 (p) ackson River below Dunlap Creek, at Covington, Va. 612 31 0 255 237 221 207 193 178 162 142 116 95.6 74.4 61.8 51.502013100 (r) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 160 136 121 111 101 91.9 82.8 74.1 63.1 55.4 47.4 42.9 39.102013100 (w) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 253 235 219 205 191 176 160 141 115 94.8 74.0 61.5 51.302014000 (p) Potts Creek at Route 18 near Covington, Va. 153 68 0 36.9 31.6 28.5 26.2 24.3 22.7 21.1 19.5 17.6 16.3 15.1 14.4 13.802014000 (r) Potts Creek at Route 18 near Covington, Va. 153 68 0 36.5 30.4 26.6 23.8 21.3 19.1 16.9 14.7 12.0 10.2 8.38 7.36 6.5102014000 (w) Potts Creek at Route 18 near Covington, Va. 153 68 0 36.9 31.6 28.5 26.2 24.3 22.6 21.0 19.4 17.5 16.2 15.0 14.3 13.702014500 (p) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 3.56 2.83 2.44 2.17 1.97 1.80 1.65 1.50 1.34 1.25 1.16 1.11 1.0802014500 (r) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 2.48 1.98 1.68 1.45 1.26 1.09 0.934 0.773 0.590 0.470 0.358 0.299 0.25002014500 (w) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 3.54 2.81 2.42 2.15 1.95 1.79 1.64 1.49 1.33 1.24 1.15 1.10 1.07
Table 4. (7-day averaged, adjusted low flow) 85

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02015700 (p) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 44.8 39.0 35.7 33.4 31.6 30.0 28.5 27.1 25.6 24.6 23.8 23.3 23.002015700 (r) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 25.7 21.3 18.5 16.5 14.7 13.1 11.5 9.98 8.10 6.82 5.54 4.84 4.2502015700 (w) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 44.4 38.6 35.4 33.1 31.2 29.6 28.2 26.8 25.3 24.3 23.4 23.0 22.702016000 (p) Cowpasture River below Route 633 near Clifton Forge, 

Va. 

461 81 0 108 94.3 86.0 79.8 74.7 70.1 65.7 61.2 55.8 52.1 48.5 46.4 44.6

02016000 (r) Cowpasture River below Route 633 near Clifton Forge, 

Va. 

461 81 0 118 100 89.0 80.7 73.3 66.6 59.8 53.2 45.0 39.2 33.3 29.9 27.1

02016000 (w) Cowpasture River below Route 633 near Clifton Forge, 

Va. 

461 81 0 108 94.4 86.1 79.8 74.7 70.0 65.6 61.0 55.6 51.8 48.2 46.1 44.4

02016500 (p) James River below Route 220 at Lick Run, Va. 1,371 81 0 408 352 318 293 271 252 234 214 191 175 159 150 14202016500 (r) James River below Route 220 at Lick Run, Va. 1,371 81 0 378 327 294 270 249 229 209 190 166 148 130 119 11102016500 (w) James River below Route 220 at Lick Run, Va. 1,371 81 0 407 352 318 292 271 252 233 214 191 174 158 149 14102017000 (p) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 5.33 4.37 3.82 3.41 3.08 2.79 2.51 2.24 1.92 1.70 1.50 1.38 1.2902017000 (r) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 2.70 2.16 1.83 1.58 1.38 1.20 1.02 0.847 0.647 0.517 0.394 0.330 0.27702017000 (w) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 5.27 4.32 3.78 3.37 3.04 2.76 2.48 2.21 1.90 1.68 1.48 1.36 1.2702017500 (p) Johns Creek at Route 615 at New Castle, Va. 105 80 0 17.2 14.6 13.1 12.0 11.0 10.2 9.44 8.64 7.71 7.06 6.45 6.09 5.8002017500 (r) Johns Creek at Route 615 at New Castle, Va. 105 80 0 24.4 20.2 17.6 15.6 14.0 12.4 10.9 9.46 7.66 6.44 5.23 4.56 4.0002017500 (w) Johns Creek at Route 615 at New Castle, Va. 105 80 0 17.3 14.7 13.2 12.0 11.1 10.3 9.47 8.66 7.71 7.05 6.43 6.06 5.7702018000 (p) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 63.6 55.5 50.4 46.6 43.3 40.4 37.5 34.5 30.8 28.2 25.6 24.1 22.802018000 (r) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 82.5 69.7 61.5 55.5 50.2 45.4 40.6 35.9 30.0 26.0 21.8 19.5 17.502018000 (w) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 64.0 55.8 50.7 46.8 43.5 40.5 37.6 34.5 30.8 28.2 25.6 24.0 22.702018500 (p) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 6.39 5.58 4.95 4.39 3.88 3.38 2.86 2.30 1.63 1.18 0.780 0.570 0.42002018500 (r) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 7.41 6.02 5.16 4.53 3.98 3.50 3.03 2.56 2.01 1.64 1.29 1.10 0.94202018500 (w) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 6.41 5.59 4.95 4.39 3.88 3.38 2.86 2.31 1.64 1.19 0.790 0.580 0.42902019000 (p) Catawba Creek near Fincastle, Va. 104 8 0 22.5 18.9 16.3 14.2 12.4 10.7 9.03 7.28 5.25 3.89 2.70 2.07 1.6002019000 (r) Catawba Creek near Fincastle, Va. 104 8 0 24.2 20.0 17.4 15.5 13.8 12.3 10.8 9.35 7.57 6.36 5.17 4.50 3.9502019000 (w) Catawba Creek near Fincastle, Va. 104 8 0 22.6 18.9 16.3 14.3 12.4 10.7 9.07 7.32 5.30 3.94 2.75 2.12 1.6402019500 (p) James River at Route 11 at Buchanan, Va. 2,073 96 0 597 523 476 440 409 380 352 322 285 258 231 215 20102019500 (r) James River at Route 11 at Buchanan, Va. 2,073 96 0 587 512 462 428 395 366 336 308 271 246 218 202 18902019500 (w) James River at Route 11 at Buchanan, Va. 2,073 96 0 597 523 476 440 408 380 351 321 284 257 230 214 20102020500 (p) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 13.1 9.59 7.60 6.20 5.10 4.18 3.36 2.59 1.78 1.29 0.890 0.690 0.550

02020500 (r) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 33.4 27.8 24.3 21.7 19.4 17.4 15.4 13.3 10.9 9.23 7.56 6.63 5.86

02020500 (w) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 13.7 10.1 8.04 6.60 5.47 4.52 3.66 2.85 1.99 1.47 1.04 0.814 0.656

02021000 (p) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 20.7 17.9 16.0 14.6 13.3 12.1 11.0 9.80 8.31 7.24 6.18 5.56 5.0402021000 (r) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 44.9 37.6 32.9 29.5 26.5 23.8 21.1 18.4 15.2 12.9 10.7 9.43 8.3802021000 (w) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 21.3 18.3 16.4 14.9 13.6 12.4 11.2 9.97 8.44 7.34 6.26 5.63 5.0902021500 (p) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 44.3 36.3 31.4 27.8 24.7 22.0 19.4 16.8 13.6 11.5 9.48 8.33 7.4002021500 (r) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 82.5 69.7 61.5 55.5 50.2 45.4 40.6 35.9 30.0 26.0 21.8 19.5 17.502021500 (w) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 45.1 37.0 32.1 28.4 25.3 22.5 19.8 17.1 14.0 11.8 9.71 8.53 7.5702022500 (p) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 9.97 8.84 8.10 7.51 6.99 6.51 6.02 5.49 4.82 4.33 3.82 3.52 3.2602022500 (r) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 7.59 6.17 5.29 4.64 4.09 3.59 3.11 2.63 2.07 1.69 1.33 1.13 0.97102022500 (w) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 9.92 8.78 8.04 7.45 6.93 6.45 5.96 5.43 4.77 4.28 3.78 3.48 3.22
86 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02023000 (p) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 103 88.6 79.3 72.3 66.3 60.9 55.6 50.1 43.4 38.6 33.9 31.1 28.8

02023000 (r) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 124 105 93.2 84.6 76.9 69.9 62.8 55.9 47.3 41.3 35.1 31.6 28.6

02023000 (w) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 104 88.9 79.6 72.5 66.5 61.1 55.8 50.2 43.4 38.6 33.9 31.1 28.8

02023500 (p) South River at Route 631 near Riverside, Va. 112 10 0 27.8 24.4 22.3 20.6 19.2 17.9 16.6 15.3 13.6 12.4 11.2 10.5 9.9102023500 (r) South River at Route 631 near Riverside, Va. 112 10 0 43.3 33.6 27.6 22.9 19.0 15.5 12.2 9.05 5.67 3.60 -- -- --02023500 (w) South River at Route 631 near Riverside, Va. 112 10 0 28.1 24.6 22.4 20.6 19.2 17.9 16.6 15.2 13.5 12.3 -- -- --02024000 (p) Maury River near Buena Vista, Va. 647 67 0 152 129 115 104 94.7 86.4 78.3 69.9 59.8 52.7 45.7 41.6 38.202024000 (r) Maury River near Buena Vista, Va. 647 67 0 170 145 129 118 107 97.9 88.3 79.1 67.4 59.3 50.9 46.0 42.002024000 (w) Maury River near Buena Vista, Va. 647 67 0 153 130 115 104 95.0 86.6 78.5 70.1 60.0 52.8 45.8 41.7 38.302024500 (p) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 244 201 178 161 148 137 126 116 104 97.0 90.1 86.4 83.402024500 (r) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 411 340 294 258 226 197 168 138 103 79.0 -- -- --02024500 (w) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 248 205 180 163 149 138 127 116 104 96.7 -- -- --02024915 (p) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 17.1 12.9 10.6 9.00 7.72 6.63 5.64 4.69 3.63 2.95 2.35 2.02 1.7602024915 (r) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 8.84 6.58 5.20 4.15 3.31 2.58 1.93 1.32 0.734 0.408 -- -- --02024915 (w) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 16.8 12.8 10.5 8.89 7.62 6.55 5.57 4.63 3.59 2.91 -- -- --02025000 (p) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 23.6 17.7 14.3 11.8 9.85 8.18 6.67 5.22 3.67 2.71 1.91 1.50 1.1902025000 (r) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 35.8 27.7 22.6 18.7 15.4 12.5 9.83 7.20 4.45 2.78 -- -- --02025000 (w) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 23.9 18.0 14.5 12.0 9.98 8.28 6.73 5.26 3.68 2.71 -- -- --02025500 (p) James River at Holcomb(s) Rock, Va. 3,256 79 0 947 821 742 681 629 581 534 485 424 381 337 312 29002025500 (r) James River at Holcomb(s) Rock, Va. 3,256 79 0 950 834 758 706 656 611 564 522 466 427 384 359 34002025500 (w) James River at Holcomb(s) Rock, Va. 3,256 79 0 947 822 742 681 629 582 535 485 425 381 338 312 29102026000 (p) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,200 1,035 929 845 772 705 638 567 479 416 353 316 28502026000 (r) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,072 944 859 801 745 696 643 597 534 490 443 414 39302026000 (w) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,197 1,033 927 844 772 705 638 568 480 417 355 318 28702026500 (p) Tye River at Roseland, Va. 69 9 0 36.2 27.4 21.8 17.7 14.2 11.3 8.61 6.12 3.63 2.26 1.25 0.820 0.54002026500 (r) Tye River at Roseland, Va. 69 9 0 25.2 19.3 15.6 12.8 10.5 8.40 6.52 4.70 2.82 1.71 -- -- --02026500 (w) Tye River at Roseland, Va. 69 9 0 35.8 27.2 21.7 17.5 14.1 11.2 8.56 6.09 3.61 2.25 -- -- --02027000 (p) Tye River at Route 158 near Lovingston, Va. 93 68 0 43.3 34.0 27.7 22.7 18.5 14.7 11.3 7.98 4.64 2.79 1.48 0.930 0.59002027000 (r) Tye River at Route 158 near Lovingston, Va. 93 68 0 35.1 27.1 22.2 18.3 15.1 12.3 9.61 7.04 4.34 2.71 -- -- --02027000 (w) Tye River at Route 158 near Lovingston, Va. 93 68 0 43.0 33.8 27.6 22.6 18.4 14.7 11.2 7.96 4.63 2.79 -- -- --02027500 (p) Piney River at Route 151 at Piney River, Va. 47.7 57 0 20.7 15.3 12.1 9.89 8.13 6.64 5.32 4.06 2.76 1.97 1.33 1.02 0.79002027500 (r) Piney River at Route 151 at Piney River, Va. 47.7 57 0 16.6 12.6 10.1 8.20 6.64 5.27 4.03 2.85 1.66 0.972 -- -- --02027500 (w) Piney River at Route 151 at Piney River, Va. 47.7 57 0 20.6 15.2 12.1 9.85 8.09 6.61 5.29 4.04 2.74 1.95 -- -- --02027800 (p) Buffalo River at Route 657 near Tye River, Va. 148 34 0 69.0 53.4 43.4 35.9 29.7 24.2 19.2 14.4 9.27 6.25 3.86 2.74 1.9702027800 (r) Buffalo River at Route 657 near Tye River, Va. 148 34 0 59.1 46.3 38.3 32.1 26.8 22.0 17.6 13.2 8.48 5.53 -- -- --02027800 (w) Buffalo River at Route 657 near Tye River, Va. 148 34 0 68.7 53.2 43.3 35.8 29.6 24.2 19.2 14.3 9.26 6.24 -- -- --02028000 (p) Tye (Buffalo) River near Norwood, Va. 355 19 0 156 123 103 88.6 76.8 66.5 56.9 47.4 36.6 29.5 23.1 19.6 16.802028000 (r) Tye (Buffalo) River near Norwood, Va. 355 19 0 157 127 107 91.9 78.7 66.6 55.1 43.2 29.9 21.2 -- -- --02028000 (w) Tye (Buffalo) River near Norwood, Va. 355 19 0 156 123 103 88.6 76.8 66.5 56.9 47.3 36.5 29.4 -- -- --02028500 (p) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 35.8 29.3 24.1 19.6 15.6 12.0 8.70 5.60 2.71 1.33 0.520 0.260 0.13002028500 (r) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 35.9 27.8 22.7 18.8 15.5 12.6 9.86 7.22 4.46 2.79 -- -- --02028500 (w) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 35.8 29.2 24.0 19.6 15.6 12.0 8.73 5.64 2.75 1.36 -- -- --02029000 (p) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,500 1,266 1,119 1,006 910 823 738 649 542 467 393 350 31502029000 (r) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,638 1,438 1,221 1,036 -- -- -- -- -- -- -- -- --02029000 (w) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,506 1,273 1,123 1,007 -- -- -- -- -- -- -- -- --
Table 4. (7-day averaged, adjusted low flow) 87

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02029500 (p) Hardware River at Route 618 near Scottsville, Va. 104 11 0 53.8 40.5 31.8 25.2 19.8 15.2 11.2 7.51 4.03 2.26 1.09 0.640 0.38002029500 (r) Hardware River at Route 618 near Scottsville, Va. 104 11 0 39.8 30.9 25.3 21.0 17.3 14.1 11.1 8.19 5.10 3.21 -- -- --02029500 (w) Hardware River at Route 618 near Scottsville, Va. 104 11 0 53.2 40.1 31.6 25.1 19.7 15.2 11.2 7.53 4.05 2.28 -- -- --02030000 (p) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 34.3 34.2 33.2 31.1 27.8 23.2 17.5 10.9 4.14 1.36 0.260 0.060 0.010

02030000 (r) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 45.0 35.0 28.8 23.9 19.8 16.2 12.8 9.49 5.97 3.80 -- -- --

02030000 (w) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 34.8 34.2 33.0 30.8 27.4 22.9 17.3 10.8 4.19 1.42 -- -- --

02030500 (p) Slate River above Route 676 near Arvonia, Va. 226 67 0 74.3 59.2 48.9 40.8 33.8 27.6 21.8 16.1 10.0 6.49 3.77 2.54 1.7302030500 (r) Slate River above Route 676 near Arvonia, Va. 226 67 0 58.3 46.3 38.4 32.2 27.0 22.3 17.7 13.3 8.40 5.44 -- -- --02030500 (w) Slate River above Route 676 near Arvonia, Va. 226 67 0 73.7 58.7 48.6 40.5 33.6 27.5 21.7 16.0 10.00 6.46 -- -- --02031000 (p) Mechums River at Route 614 near White Hall (Ivy), Va. 95.3 36 1 36.9 28.2 22.7 18.4 14.9 11.8 8.94 6.23 3.38 1.60 0.000 0.000 0.00002031000 (r) Mechums River at Route 614 near White Hall (Ivy), Va. 95.3 36 1 36.1 27.9 22.8 18.9 15.6 12.6 9.93 7.27 4.50 2.81 -- -- --02031000 (w) Mechums River at Route 614 near White Hall (Ivy), Va. 95.3 36 1 36.8 28.2 22.7 18.4 14.9 11.8 8.96 6.25 3.40 1.62 -- -- --02031500 (p) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 2 0.810 0.600 0.470 0.370 0.280 0.210 0.130 0.040 0.000 0.000 0.000 0.000 0.000

02031500 (r) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 2 3.29 2.38 1.84 1.43 1.11 0.844 0.610 0.400 0.206 0.105 -- -- --

02031500 (w) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 2 0.885 0.651 0.507 0.398 0.301 0.225 0.141 0.048 0.004 0.002 -- -- --

02032250 (p) Moormans River at Route 601 near Free Union, Va. 77 18 0 12.5 8.24 6.03 4.57 3.50 2.65 1.96 1.35 0.790 0.500 0.290 0.200 0.14002032250 (r) Moormans River at Route 601 near Free Union, Va. 77 18 0 28.4 21.9 17.8 14.6 12.0 9.65 7.52 5.45 3.31 2.03 -- -- --02032250 (w) Moormans River at Route 601 near Free Union, Va. 77 18 0 13.0 8.71 6.41 4.89 3.76 2.85 2.11 1.45 0.844 0.531 -- -- --02032400 (p) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 7.86 5.25 3.94 3.08 2.46 1.96 1.54 1.17 0.800 0.580 0.410 0.330 0.260

02032400 (r) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 11.6 8.68 6.90 5.55 4.45 3.50 2.64 1.84 1.04 0.591 -- -- --

02032400 (w) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 7.98 5.35 4.02 3.15 2.51 2.00 1.56 1.18 0.804 0.580 -- -- --

02032500 (p) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 40.6 26.0 18.9 14.3 11.1 8.54 6.47 4.68 2.98 2.05 1.34 1.01 0.78002032500 (r) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 89.7 71.2 59.5 50.3 42.4 35.3 28.7 21.9 14.5 9.80 -- -- --02032500 (w) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 42.3 27.5 20.1 15.4 12.0 9.26 7.02 5.09 3.21 2.20 -- -- --02032515 (p) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 62.2 46.2 36.9 30.3 25.1 20.7 16.7 12.9 8.94 6.51 4.50 3.49 2.7402032515 (r) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 111 88.2 74.0 62.9 53.4 44.7 36.5 28.2 19.0 13.0 -- -- --02032515 (w) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 63.5 47.3 37.9 31.2 25.8 21.2 17.1 13.2 9.11 6.61 -- -- --
88 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02032640 (p) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 30.9 20.4 14.6 10.7 7.78 5.56 3.78 2.32 1.11 0.570 0.250 0.140 0.08002032640 (r) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 41.5 32.2 26.4 21.9 18.2 14.8 11.7 8.62 5.38 3.41 -- -- --02032640 (w) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 31.4 20.9 15.1 11.1 8.19 5.90 4.05 2.53 1.23 0.644 -- -- --02032680 (p) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 63.1 47.7 38.3 31.4 25.9 21.1 16.8 12.6 8.30 5.72 3.66 2.68 1.98

02032680 (r) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 70.8 55.8 46.4 39.0 32.7 27.0 21.7 16.4 10.7 7.08 -- -- --

02032680 (w) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 63.3 47.9 38.5 31.6 26.0 21.2 16.9 12.7 8.34 5.74 -- -- --

02033500 (p) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 73.1 54.8 43.3 34.7 27.7 21.8 16.5 11.6 6.75 4.12 2.24 1.45 0.95002033500 (r) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 232 189 162 140 121 103 86.7 69.3 49.4 36.1 -- -- --02033500 (w) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 78.4 59.0 46.8 37.8 30.3 23.9 18.2 12.9 7.58 4.70 -- -- --02034000 (p) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 217 167 135 111 91.6 74.5 59.0 44.1 28.4 19.2 11.9 8.47 6.1102034000 (r) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 316 260 224 195 170 147 124 101 73.6 55.2 -- -- --02034000 (w) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 220 169 137 113 93.5 76.2 60.4 45.2 29.2 19.8 -- -- --02034500 (p) Willis River at Route 690 at Lakeside Village (Flanagan 

Mills), Va. 

262 56 0 66.1 50.6 40.7 33.2 27.0 21.7 16.8 12.1 7.41 4.72 2.71 1.82 1.24

02034500 (r) Willis River at Route 690 at Lakeside Village (Flanagan 

Mills), Va. 

262 56 0 66.1 52.7 43.7 36.7 30.8 25.5 20.3 15.3 9.71 6.32 -- -- --

02034500 (w) Willis River at Route 690 at Lakeside Village (Flanagan 

Mills), Va. 

262 56 0 66.1 50.7 40.8 33.3 27.1 21.8 16.9 12.2 7.48 4.76 -- -- --

02035000 (p) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,057 1,718 1,503 1,339 1,198 1,071 947 819 665 557 455 396 34802035000 (r) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,361 2,110 1,797 1,528 -- -- -- -- -- -- -- -- --02035000 (w) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,070 1,734 1,515 1,346 -- -- -- -- -- -- -- -- --02036500 (p) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 4.63 3.44 2.68 2.10 1.63 1.24 0.900 0.590 0.310 0.170 0.080 0.040 0.03002036500 (r) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 8.04 6.21 5.04 4.13 3.38 2.72 2.10 1.49 0.870 0.521 -- -- --02036500 (w) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 4.79 3.56 2.78 2.18 1.70 1.30 0.942 0.624 0.329 0.181 -- -- --02037500 (p) James River above Route 147 near Richmond, Va. 6,753 72 0 2,213 1,646 1,255 954 710 508 339 197 82.3 35.5 12.0 5.34 2.3902037500 (r) James River above Route 147 near Richmond, Va. 6,753 72 0 2,585 2,321 1,977 1,683 -- -- -- -- -- -- -- -- --02037500 (w) James River above Route 147 near Richmond, Va. 6,753 72 0 2,246 1,704 1,315 1,011 -- -- -- -- -- -- -- -- --02038000 (p) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 3.18 3.06 2.86 2.61 2.30 1.94 1.53 1.06 0.540 0.260 0.090 0.040 0.02002038000 (r) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 6.39 4.30 3.11 2.26 1.63 1.12 -- -- -- -- -- -- --02038000 (w) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 3.58 3.21 2.89 2.57 2.23 1.87 -- -- -- -- -- -- --02038500 (p) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 8.37 5.30 3.69 2.65 1.91 1.35 0.910 0.560 0.270 0.140 0.060 0.040 0.020

02038500 (r) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 9.74 6.52 4.70 3.42 2.47 1.69 -- -- -- -- -- -- --

02038500 (w) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 8.61 5.51 3.85 2.77 1.99 1.39 -- -- -- -- -- -- --
Table 4. (7-day averaged, adjusted low flow) 89

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02038850 (p) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 3.05 2.67 2.33 2.00 1.68 1.36 1.05 0.720 0.390 0.210 0.090 0.050 0.020

02038850 (r) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 3.52 2.69 2.16 1.75 1.42 1.13 0.860 0.600 0.338 0.196 -- -- --

02038850 (w) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 3.07 2.67 2.32 1.99 1.67 1.35 1.04 0.716 0.388 0.210 -- -- --

02039000 (p) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 24.5 23.2 21.4 19.5 17.2 14.7 11.9 8.71 4.97 2.75 1.21 0.630 0.32002039000 (r) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 21.2 16.6 13.6 11.3 9.37 7.63 5.98 4.36 2.65 1.65 -- -- --02039000 (w) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 24.4 22.9 21.2 19.2 17.0 14.5 11.7 8.58 4.91 2.72 -- -- --02039500 (p) Appomattox River at Route 45 at Farmville, Va. 302 79 0 69.0 67.8 67.6 66.3 63.2 57.6 48.9 36.3 18.9 8.47 2.46 0.860 0.28002039500 (r) Appomattox River at Route 45 at Farmville, Va. 302 79 0 74.7 59.6 49.5 41.6 35.0 29.1 23.2 17.4 11.2 7.30 -- -- --02039500 (w) Appomattox River at Route 45 at Farmville, Va. 302 79 0 69.2 67.5 66.9 65.5 62.2 56.7 48.2 35.7 18.6 8.44 -- -- --02040000 (p) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 193 161 137 117 99.2 82.8 66.8 50.5 32.5 21.4 12.7 8.61 5.8902040000 (r) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 158 128 107 90.6 76.8 64.5 52.1 39.9 26.4 17.8 -- -- --02040000 (w) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 192 159 136 116 98.6 82.2 66.4 50.2 32.3 21.3 -- -- --02041000 (p) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 32.1 22.9 17.0 12.6 9.25 6.52 4.30 2.49 1.04 0.460 0.160 0.070 0.03002041000 (r) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 42.9 33.9 28.0 23.4 19.6 16.1 12.8 9.46 5.91 3.78 -- -- --02041000 (w) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 32.8 23.6 17.6 13.2 9.81 7.03 4.72 2.85 1.27 0.608 -- -- --02041500 (p) Appomattox River near Petersburg, Va. 1,333 36 0 334 263 218 184 156 130 107 83.4 57.7 41.6 28.1 21.3 16.302041500 (r) Appomattox River near Petersburg, Va. 1,333 36 0 267 217 182 156 133 112 91.5 71.0 47.9 32.9 -- -- --02041500 (w) Appomattox River near Petersburg, Va. 1,333 36 0 332 262 217 183 155 130 106 83.1 57.5 41.4 -- -- --02041650 (p) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 265 204 168 141 119 101 83.5 66.7 48.1 36.4 26.3 21.0 17.002041650 (r) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 268 218 183 156 134 113 92.1 71.4 48.2 33.2 -- -- --02041650 (w) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 265 204 168 142 120 101 83.8 66.8 48.1 36.3 -- -- --02042500 (p) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 43.1 30.6 22.7 16.9 12.3 8.67 5.71 3.29 1.37 0.600 0.210 0.090 0.040

02042500 (r) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 38.3 25.3 18.1 13.2 9.48 6.40 -- -- -- -- -- -- --

02042500 (w) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 42.2 29.7 21.9 16.2 11.9 8.35 -- -- -- -- -- -- --

02044000 (p) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 1 3.97 2.57 1.81 1.31 0.950 0.670 0.450 0.270 0.120 0.040 0.000 0.000 0.00002044000 (r) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 1 12.8 9.99 8.15 6.71 5.53 4.47 3.48 2.50 1.49 0.907 -- -- --02044000 (w) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 1 4.48 2.98 2.14 1.58 1.17 0.848 0.581 0.372 0.178 0.074 -- -- --02044500 (p) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 84.0 60.7 46.2 35.6 27.2 20.3 14.4 9.28 4.68 2.49 1.13 0.630 0.36002044500 (r) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 77.9 62.1 51.6 43.4 36.6 30.4 24.3 18.3 11.7 7.67 -- -- --02044500 (w) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 83.6 60.8 46.4 35.9 27.6 20.7 14.8 9.64 4.94 2.66 -- -- --02045500 (p) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 125 87.5 66.9 52.7 41.8 32.9 25.3 18.3 11.5 7.67 4.76 3.42 2.5002045500 (r) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 80.0 52.3 37.3 27.1 19.5 13.1 -- -- -- -- -- -- --02045500 (w) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 119 83.3 63.6 49.9 39.5 31.2 -- -- -- -- -- -- --02046000 (p) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 11.7 7.42 5.15 3.66 2.60 1.80 1.18 0.700 0.310 0.150 0.060 0.030 0.02002046000 (r) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 32.2 25.4 20.9 17.4 14.5 11.9 9.36 6.89 4.26 2.69 -- -- --02046000 (w) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 13.1 8.57 6.11 4.46 3.26 2.35 1.60 1.03 0.505 0.266 -- -- --02047000 (p) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 212 145 111 88.1 71.4 57.9 46.4 36.0 25.4 19.1 14.0 11.4 9.4102047000 (r) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 180 116 82.8 60.1 43.2 28.7 -- -- -- -- -- -- --02047000 (w) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 208 142 108 85.3 68.7 55.5 -- -- -- -- -- -- --02047500 (p) Blackwater River at Route 617 near Dendron, Va. 290 61 23 17.1 7.36 3.74 1.91 0.850 0.170 0.000 0.000 0.000 0.000 0.000 0.000 0.00002047500 (r) Blackwater River at Route 617 near Dendron, Va. 290 61 23 43.5 28.7 20.5 14.9 10.7 7.25 -- -- -- -- -- -- --02047500 (w) Blackwater River at Route 617 near Dendron, Va. 290 61 23 23.3 12.2 7.39 4.62 2.81 1.42 -- -- -- -- -- -- --
90 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02048000 (p) Blackwater River at Route 460 at Zuni, Va. 451 45 3 25.3 13.1 7.72 4.71 2.86 1.66 0.870 0.360 0.060 0.000 0.000 0.000 0.00002048000 (r) Blackwater River at Route 460 at Zuni, Va. 451 45 3 64.3 42.1 30.1 21.9 15.8 10.6 -- -- -- -- -- -- --02048000 (w) Blackwater River at Route 460 at Zuni, Va. 451 45 3 37.7 22.1 14.4 9.65 6.40 3.87 -- -- -- -- -- -- --02049500 (p) Blackwater River near Franklin, Va. 613 60 0 38.2 19.0 11.6 7.64 5.19 3.54 2.36 1.47 0.770 0.460 0.260 0.180 0.12002049500 (r) Blackwater River near Franklin, Va. 613 60 0 84.4 55.1 39.4 28.6 20.6 13.8 -- -- -- -- -- -- --02049500 (w) Blackwater River near Franklin, Va. 613 60 0 47.7 26.3 16.9 11.5 7.87 5.13 -- -- -- -- -- -- --02050500 (p) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 1.66 1.10 0.830 0.660 0.540 0.440 0.360 0.280 0.210 0.170 0.130 0.110 0.10002050500 (r) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 3.70 2.83 2.28 1.85 1.50 1.19 0.909 0.635 0.358 0.208 -- -- --02050500 (w) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 1.74 1.16 0.879 0.698 0.569 0.462 0.375 0.290 0.214 0.171 -- -- --02051000 (p) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 1 6.23 5.07 4.14 3.33 2.61 1.96 1.36 0.820 0.340 0.120 0.010 0.000 0.00002051000 (r) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 1 17.6 13.8 11.3 9.32 7.71 6.26 4.89 3.55 2.14 1.32 -- -- --02051000 (w) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 1 6.81 5.49 4.47 3.60 2.82 2.14 1.50 0.931 0.407 0.161 -- -- --02051500 (p) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 115 91.1 75.1 62.4 51.6 41.9 32.9 24.1 14.8 9.44 5.38 3.57 2.3902051500 (r) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 125 101 84.0 71.1 60.2 50.3 40.5 30.8 20.2 13.5 -- -- --02051500 (w) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 115 91.4 75.4 62.7 51.9 42.2 33.1 24.3 14.9 9.54 -- -- --02051600 (p) Great Creek at Route 763 (old Route 618) near Cochran, Va. 30.8 27 0 6.15 4.56 3.57 2.84 2.24 1.74 1.30 0.900 0.510 0.300 0.160 0.100 0.06002051600 (r) Great Creek at Route 763 (old Route 618) near Cochran, Va. 30.8 27 0 10.6 8.20 6.67 5.48 4.51 3.63 2.81 2.02 1.19 0.719 -- -- --02051600 (w) Great Creek at Route 763 (old Route 618) near Cochran, Va. 30.8 27 0 6.34 4.71 3.69 2.94 2.32 1.81 1.35 0.938 0.531 0.312 -- -- --02052000 (p) Meherrin River at Route 301 at Emporia, Va. 744 56 0 132 101 82.7 68.8 57.4 47.5 38.4 29.6 20.1 14.3 9.54 7.17 5.4702052000 (r) Meherrin River at Route 301 at Emporia, Va. 744 56 0 100 65.3 46.6 33.8 24.4 16.3 -- -- -- -- -- -- --02052000 (w) Meherrin River at Route 301 at Emporia, Va. 744 56 0 128 97.6 79.1 65.4 54.4 45.0 -- -- -- -- -- -- --02052500 (p) Fountains (Fontaine) Creek at Route 603 near Brink, Va. 68.7 42 9 4.01 2.60 1.67 1.01 0.540 0.230 0.050 0.000 0.000 0.000 0.000 0.000 0.00002052500 (r) Fountains (Fontaine) Creek at Route 603 near Brink, Va. 68.7 42 9 12.2 8.14 5.86 4.27 3.08 2.10 -- -- -- -- -- -- --02052500 (w) Fountains (Fontaine) Creek at Route 603 near Brink, Va. 68.7 42 9 6.83 4.46 3.03 2.03 1.30 0.735 -- -- -- -- -- -- --02053000 (p) Fountains (Fontaine) Creek at Route 639 near Emporia, 

Va. 

95.9 9 0 17.2 12.2 9.22 7.05 5.36 3.98 2.81 1.80 0.910 0.480 0.220 0.120 0.070

02053000 (r) Fountains (Fontaine) Creek at Route 639 near Emporia, 

Va. 

95.9 9 0 16.4 10.9 7.84 5.70 4.11 2.80 -- -- -- -- -- -- --

02053000 (w) Fountains (Fontaine) Creek at Route 639 near Emporia, 

Va. 

95.9 9 0 17.0 12.0 9.03 6.87 5.20 3.85 -- -- -- -- -- -- --

02053800 (p) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 38.6 32.9 29.1 26.1 23.5 21.1 18.7 16.2 13.1 10.9 8.79 7.56 6.57

02053800 (r) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 42.0 32.6 26.7 22.2 18.4 15.0 11.8 8.72 5.46 3.46 -- -- --

02053800 (w) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 38.7 32.9 29.1 26.1 23.4 21.0 18.6 16.1 13.0 10.8 -- -- --

02054500 (p) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 69.7 59.9 53.3 48.2 43.6 39.4 35.2 30.7 25.2 21.3 17.4 15.1 13.302054500 (r) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 62.6 52.7 46.3 41.7 37.6 33.9 30.2 26.5 22.0 18.9 15.8 14.0 12.502054500 (w) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 69.6 59.7 53.2 48.0 43.5 39.3 35.1 30.6 25.1 21.2 17.4 15.1 13.302054530 (p) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 91.1 76.2 66.5 58.9 52.4 46.5 40.7 34.6 27.3 22.3 17.5 14.8 12.702054530 (r) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 69.7 58.7 51.7 46.6 42.1 38.0 33.9 29.9 24.9 21.4 17.9 15.9 14.302054530 (w) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 90.6 75.8 66.2 58.7 52.2 46.3 40.5 34.5 27.3 22.2 17.5 14.8 12.7
Table 4. (7-day averaged, adjusted low flow) 91

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02055000 (p) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 110 92.5 81.5 73.0 65.8 59.3 52.9 46.2 38.2 32.5 27.1 23.9 21.302055000 (r) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 97.3 82.4 72.8 65.9 59.7 54.2 48.5 43.0 36.1 31.4 26.5 23.7 21.402055000 (w) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 110 92.3 81.3 72.9 65.7 59.2 52.8 46.1 38.1 32.5 27.1 23.9 21.302055100 (p) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 4.64 3.71 3.14 2.70 2.34 2.01 1.70 1.39 1.04 0.810 0.600 0.490 0.40002055100 (r) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 2.35 1.88 1.59 1.37 1.19 1.03 0.882 0.729 0.555 0.442 0.336 0.280 0.23502055100 (w) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 4.58 3.67 3.10 2.67 2.31 1.99 1.68 1.38 1.03 0.803 0.595 0.486 0.39702056000 (p) Roanoke River below powerplant at Niagara, Va. 509 80 0 179 158 144 134 124 116 107 97.3 85.5 76.8 67.9 62.6 58.002056000 (r) Roanoke River below powerplant at Niagara, Va. 509 80 0 131 112 99.2 90.1 81.9 74.5 67.0 59.8 50.6 44.2 37.7 33.9 30.802056000 (w) Roanoke River below powerplant at Niagara, Va. 509 80 0 178 157 143 133 123 115 106 96.6 84.8 76.2 67.4 62.1 57.602056650 (p) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 15.4 12.5 10.5 8.82 7.39 6.08 4.84 3.60 2.27 1.48 0.860 0.580 0.40002056650 (r) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 19.8 15.1 12.2 9.91 8.05 6.42 4.94 3.52 2.08 1.24 -- -- --02056650 (w) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 15.5 12.6 10.5 8.85 7.41 6.09 4.84 3.60 2.27 1.48 -- -- --02056900 (p) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 56.7 46.3 39.2 33.5 28.5 24.0 19.6 15.2 10.3 7.17 4.60 3.33 2.4402056900 (r) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 44.6 34.7 28.5 23.7 19.6 16.0 12.7 9.38 5.89 3.75 -- -- --02056900 (w) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 56.4 46.0 38.9 33.2 28.3 23.8 19.5 15.1 10.2 7.12 -- -- --02057000 (p) Blackwater River near Union Hall, Va. 208 37 0 118 98.0 84.8 74.4 65.4 57.1 49.0 40.5 30.5 23.8 17.6 14.2 11.602057000 (r) Blackwater River near Union Hall, Va. 208 37 0 86.5 68.5 57.2 48.3 40.7 33.9 27.4 20.9 13.8 9.32 -- -- --02057000 (w) Blackwater River near Union Hall, Va. 208 37 0 117 97.3 84.2 73.8 64.9 56.6 48.6 40.1 30.3 23.6 -- -- --02057500 (p) Roanoke River near Toshes, Va. 1,017 36 0 409 345 305 273 247 222 198 172 142 120 98.8 86.7 76.702057500 (r) Roanoke River near Toshes, Va. 1,017 36 0 511 425 370 326 288 252 217 180 136 106 -- -- --02057500 (w) Roanoke River near Toshes, Va. 1,017 36 0 411 347 306 275 247 222 198 172 141 120 -- -- --02058000 (p) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 32.5 27.7 24.8 22.6 20.7 19.0 17.4 15.8 13.8 12.4 11.1 10.3 9.5902058000 (r) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 18.6 14.5 11.9 9.85 8.15 6.63 5.18 3.76 2.27 1.41 -- -- --02058000 (w) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 32.1 27.3 24.4 22.2 20.4 18.7 17.2 15.5 13.6 12.2 -- -- --02058400 (p) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 198 168 146 129 113 98.2 83.6 68.2 49.9 37.6 26.5 20.6 16.202058400 (r) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 155 125 106 90.7 77.6 65.7 54.3 42.5 29.4 20.8 -- -- --02058400 (w) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 197 167 145 128 112 97.5 83.1 67.7 49.6 37.4 -- -- --02058500 (p) Pigg River along Route 605 near Toshes, Va. 382 32 0 214 185 164 147 131 116 102 85.7 66.2 52.5 39.5 32.2 26.502058500 (r) Pigg River along Route 605 near Toshes, Va. 382 32 0 171 138 117 100 86.1 73.1 60.6 47.7 33.2 23.7 -- -- --02058500 (w) Pigg River along Route 605 near Toshes, Va. 382 32 0 213 184 163 146 130 116 101 85.1 65.8 52.1 -- -- --02059500 (p) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 74.6 63.8 56.2 49.8 44.1 38.7 33.2 27.4 20.4 15.6 11.2 8.78 6.9502059500 (r) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 77.2 61.0 50.8 42.8 36.0 29.8 24.1 18.3 12.0 7.98 -- -- --02059500 (w) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 74.7 63.8 56.0 49.6 43.9 38.5 33.0 27.2 20.3 15.5 -- -- --02060500 (p) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 867 765 688 621 558 496 432 362 273 211 152 119 94.2

02060500 (r) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 957 810 717 641 574 512 451 385 306 252 -- -- --

02060500 (w) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 869 766 689 621 558 497 433 362 274 211 -- -- --

02061000 (p) Big Otter River (Otter River) at Route 221 near Bedford, Va. 114 16 0 39.6 29.6 24.0 20.1 17.0 14.4 12.0 9.74 7.29 5.74 4.38 3.66 3.1102061000 (r) Big Otter River (Otter River) at Route 221 near Bedford, Va. 114 16 0 44.1 34.3 28.2 23.4 19.4 15.8 12.5 9.27 5.82 3.70 -- -- --02061000 (w) Big Otter River (Otter River) at Route 221 near Bedford, Va. 114 16 0 39.8 29.7 24.1 20.1 17.0 14.4 12.0 9.73 7.27 5.71 -- -- --
92 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 7-day averaged, adjusted low flow (ft3/s) 02061500 (p) Big Otter River (Otter River) at Route 682 near Eving- ton, Va. 315 69 0 124 111 98.7 86.5 74.4 62.0 49.2 35.6 20.5 11.7 5.56 3.13 1.75 02061500 (r) Big Otter River (Otter River) at Route 682 near Eving- ton, Va. 315 69 0 138 110 93.2 79.6 67.9 57.3 47.1 36.7 25.2 17.6 -- -- -- 02061500 (w) Big Otter River (Otter River) at Route 682 near Eving- ton, Va. 315 69 0 125 111 98.6 86.4 74.2 61.9 49.1 35.6 20.6 11.8 -- -- -- 02062500 (p) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,113 969 867 781 703 629 553 471 368 295 224 185 153 02062500 (r) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,337 1,143 1,019 920 830 747 666 577 471 399 -- -- -- 02062500 (w) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,119 973 870 784 706 631 555 472 370 296 -- -- -- 02064000 (p) Falling River at Route 643 near Naruna, Va. 165 69 0 58.4 52.0 46.4 41.2 36.1 31.0 25.6 19.8 12.9 8.44 4.85 3.19 2.09 02064000 (r) Falling River at Route 643 near Naruna, Va. 165 69 0 44.5 35.2 29.1 24.3 20.3 16.8 13.3 9.85 6.17 3.95 -- -- --

02064000 (w) Falling River at Route 643 near Naruna, Va. 165 69 0 57.9 51.5 45.9 40.7 35.7 30.6 25.3 19.5 12.7 8.34 -- -- --02065200 (p) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,076 970 882 800 721 640 555 458 335 249 169 126 94.8

02065200 (r) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,512 1,296 1,160 1,049 950 858 768 669 551 472 -- -- --

02065200 (w) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,087 978 888 806 726 644 558 461 338 252 -- -- --

02065500 (p) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 27.4 25.5 25.4 25.2 24.5 22.7 19.4 14.3 6.89 2.72 0.620 0.170 0.04002065500 (r) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 28.4 22.3 18.4 15.3 12.7 10.4 8.17 6.00 3.69 2.32 -- -- --02065500 (w) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 27.4 25.4 25.1 24.8 24.0 22.2 19.0 14.0 6.78 2.71 -- -- --02066000 (p) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,313 1,175 1,069 975 886 798 705 601 467 370 275 222 179

02066000 (r) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 982 841 711 602 -- -- -- -- -- -- -- -- --

02066000 (w) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,299 1,161 1,054 960 -- -- -- -- -- -- -- -- --

02066500 (p) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 32.7 22.2 16.1 11.9 8.75 6.26 4.25 2.60 1.21 0.610 0.260 0.140 0.07002066500 (r) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 37.5 29.6 24.4 20.4 17.0 14.0 11.0 8.15 5.07 3.22 -- -- --02066500 (w) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 33.0 22.6 16.6 12.3 9.15 6.63 4.55 2.86 1.38 0.714 -- -- --02067000 (p) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,533 1,313 1,158 1,029 914 804 694 576 434 335 244 195 156

02067000 (r) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,085 933 790 669 -- -- -- -- -- -- -- -- --

02067000 (w) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,513 1,297 1,142 1,014 -- -- -- -- -- -- -- -- --

02069700 (p) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 74.2 64.5 57.6 51.8 46.7 41.7 36.7 31.3 24.5 19.7 15.1 12.5 10.402069700 (r) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 25.3 19.9 16.3 13.6 11.3 9.20 7.23 5.29 3.24 2.03 -- -- --02069700 (w) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 72.7 63.2 56.4 50.8 45.8 40.9 36.0 30.6 24.0 19.3 -- -- --02070000 (p) North Mayo River below Route 629 near Spencer, Va. 108 77 0 75.1 65.9 59.0 53.1 47.6 42.3 36.8 30.7 23.2 17.9 13.0 10.3 8.1402070000 (r) North Mayo River below Route 629 near Spencer, Va. 108 77 0 30.9 24.4 20.1 16.7 13.9 11.4 8.97 6.60 4.07 2.57 -- -- --02070000 (w) North Mayo River below Route 629 near Spencer, Va. 108 77 0 73.7 64.7 57.9 52.1 46.7 41.5 36.1 30.1 22.8 17.6 -- -- --
Table 4. (7-day averaged, adjusted low flow) 93

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

02071530 (p) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 24.6 18.4 15.2 13.0 11.3 9.95 8.72 7.55 6.29 5.49 4.78 4.40 4.09

02071530 (r) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 8.55 6.35 5.02 4.01 3.19 2.48 1.85 1.27 0.703 0.390 -- -- --

02071530 (w) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 24.2 18.1 15.0 12.8 11.2 9.80 8.60 7.44 6.21 5.42 -- -- --

02072000 (p) Smith River below Philpott Dam near Philpott, Va. 215 59 0 160 139 124 113 103 94.1 84.9 75.0 62.7 53.7 44.9 39.6 35.302072000 (r) Smith River below Philpott Dam near Philpott, Va. 215 59 0 89.7 71.2 59.5 50.3 42.4 35.3 28.7 21.9 14.5 9.80 -- -- --02072000 (w) Smith River below Philpott Dam near Philpott, Va. 215 59 0 158 137 123 112 102 93.0 84.0 74.1 62.0 53.2 -- -- --02072500 (p) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 190 167 152 141 131 121 112 102 89.7 80.6 71.5 66.0 61.402072500 (r) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 111 88.2 74.0 62.9 53.4 44.7 36.5 28.2 19.0 13.0 -- -- --02072500 (w) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 189 166 151 139 129 120 111 101 88.7 79.8 -- -- --02073000 (p) Smith River below Route 58 at Martinsville, Va. 379 76 0 273 245 225 207 192 176 160 142 118 101 82.5 71.7 62.602073000 (r) Smith River below Route 58 at Martinsville, Va. 379 76 0 169 137 116 99.5 85.3 72.3 60.0 47.2 32.9 23.4 -- -- --02073000 (w) Smith River below Route 58 at Martinsville, Va. 379 76 0 270 242 222 205 190 174 158 140 117 99.6 -- -- --02073500 (p) Leatherwood Creek at Route 650 near Martinsville (Old 

Liberty), Va. 

68.4 8 0 19.9 14.2 10.8 8.46 6.63 5.12 3.82 2.66 1.54 0.950 0.530 0.350 0.230

02073500 (r) Leatherwood Creek at Route 650 near Martinsville (Old 

Liberty), Va. 

68.4 8 0 20.9 16.4 13.4 11.1 9.22 7.51 5.88 4.29 2.60 1.62 -- -- --

02073500 (w) Leatherwood Creek at Route 650 near Martinsville (Old 

Liberty), Va. 

68.4 8 0 19.9 14.3 10.9 8.56 6.72 5.20 3.89 2.72 1.57 0.969 -- -- --

02074500 (p) Sandy River above Route 863 near Danville, Va. 111 76 0 52.6 44.2 38.6 34.2 30.3 26.8 23.3 19.6 15.2 12.1 9.27 7.68 6.4202074500 (r) Sandy River above Route 863 near Danville, Va. 111 76 0 31.7 25.0 20.5 17.1 14.2 11.7 9.20 6.77 4.18 2.64 -- -- --02074500 (w) Sandy River above Route 863 near Danville, Va. 111 76 0 51.9 43.6 38.1 33.7 29.9 26.4 22.9 19.3 14.9 11.9 -- -- --02075000 (p) Dan River at railroad bridge at Danville, Va. 2,060 60 0 1,025 908 828 763 706 651 595 534 457 399 341 305 27502075000 (r) Dan River at railroad bridge at Danville, Va. 2,060 60 0 387 316 267 229 196 167 137 107 73.4 51.2 -- -- --02075000 (w) Dan River at railroad bridge at Danville, Va. 2,060 60 0 1,007 891 813 750 694 639 585 524 449 392 -- -- --02075045 (p) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 1,233 1,078 951 838 730 625 517 401 265 178 106 72.4 49.302075045 (r) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 396 323 273 234 201 171 140 110 75.4 52.7 -- -- --02075045 (w) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 1,205 1,054 931 820 716 612 507 393 261 175 -- -- --02075500 (p) Dan River at Route 658 at Paces, Va. 2,587 56 0 1,224 1,081 975 884 800 717 632 538 419 333 250 204 16602075500 (r) Dan River at Route 658 at Paces, Va. 2,587 56 0 471 385 326 280 241 206 169 133 91.8 64.6 -- -- --02075500 (w) Dan River at Route 658 at Paces, Va. 2,587 56 0 1,201 1,061 957 868 786 705 622 528 412 328 -- -- --02076500 (p) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 5.46 4.67 4.15 3.74 3.38 3.05 2.72 2.38 1.95 1.65 1.36 1.18 1.0402076500 (r) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 3.74 2.86 2.30 1.87 1.52 1.21 0.920 0.643 0.363 0.211 -- -- --02076500 (w) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 5.41 4.62 4.10 3.69 3.33 3.01 2.68 2.34 1.92 1.62 -- -- --02077000 (p) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 185 153 131 113 97.6 83.2 69.3 55.0 38.7 28.0 18.9 14.2 10.802077000 (r) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 124 99.8 83.4 70.5 59.7 49.9 40.2 30.6 20.0 13.3 -- -- --02077000 (w) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 183 151 129 112 96.5 82.3 68.6 54.4 38.2 27.7 -- -- --02077500 (p) Hyco River at Route 501 near Denniston, Va. 288 59 0 29.5 25.3 21.5 17.9 14.5 11.3 8.19 5.22 2.42 1.11 0.390 0.180 0.08002077500 (r) Hyco River at Route 501 near Denniston, Va. 288 59 0 71.7 57.2 47.5 39.9 33.5 27.8 22.2 16.7 10.7 6.95 -- -- --02077500 (w) Hyco River at Route 501 near Denniston, Va. 288 59 0 31.5 26.8 22.7 18.9 15.3 11.9 8.69 5.66 2.71 1.30 -- -- --02078000 (p) Hyco River at Route 738 near Omega, Va. 412 15 0 41.8 28.4 21.2 16.4 12.8 9.89 7.47 5.32 3.26 2.14 1.31 0.930 0.68002078000 (r) Hyco River at Route 738 near Omega, Va. 412 15 0 97.5 78.0 65.0 54.8 46.3 38.6 30.9 23.4 15.1 10.0 -- -- --02078000 (w) Hyco River at Route 738 near Omega, Va. 412 15 0 44.2 30.4 22.9 17.8 13.9 10.9 8.22 5.93 3.63 2.36 -- -- --02079000 (p) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 3,492 2,976 2,654 2,408 2,200 2,011 1,827 1,635 1,404 1,239 1,077 982 90302079000 (r) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 1,158 959 820 712 618 535 445 358 257 187 -- -- --02079000 (w) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 3,423 2,919 2,604 2,364 2,162 1,975 1,797 1,605 1,379 1,218 -- -- --
94 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 7-day averaged, adjusted low flow (ft3/s) 02079640 (p) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 5.73 3.43 2.31 1.61 1.12 0.760 0.480 0.250 0.000 0.000 0.000 0.000 0.000 02079640 (r) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 17.0 13.2 10.8 8.95 7.40 6.01 4.69 3.40 2.04 1.26 -- -- -- 02079640 (w) Allen Creek at Route 58 near Boydton, Va. 53.5 39 4 6.36 3.96 2.75 1.97 1.41 1.000 0.658 0.391 0.084 0.048 -- -- -- 03164000 (p) New River at Route 94 near Galax, Va. 1,141 76 0 903 790 716 658 607 559 512 460 396 349 302 274 250 03164000 (r) New River at Route 94 near Galax, Va. 1,141 76 0 581 485 424 375 332 291 252 210 161 127 -- -- -- 03164000 (w) New River at Route 94 near Galax, Va. 1,141 76 0 895 783 710 652 602 554 507 456 393 347 -- -- -- 03164500 (p) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 03164500 (r) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 03164500 (w) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 03165000 (p) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 39.1 34.3 31.1 28.5 26.3 24.2 22.1 19.9 17.0 15.0 12.9 11.6 10.6 03165000 (r) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 13.4 10.1 8.07 6.52 5.24 4.14 3.14 2.20 1.26 0.725 -- -- -- 03165000 (w) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 38.5 33.7 30.6 28.1 25.9 23.8 21.8 19.6 16.8 14.8 -- -- -- 03165500 (p) New River at Ivanhoe, Va. 1,350 59 0 1,016 876 785 715 655 599 545 487 415 364 313 283 258 03165500 (r) New River at Ivanhoe, Va. 1,350 59 0 701 589 517 459 408 360 314 264 205 164 -- -- --

03165500 (w) New River at Ivanhoe, Va. 1,350 59 0 1,009 869 780 710 650 595 541 483 412 361 -- -- --03166800 (p) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.150 0.120 0.090 0.080 0.070 0.060 0.050 0.040 0.030 0.020 0.020 0.020 0.01003166800 (r) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 1.39 1.10 0.925 0.795 0.687 0.591 0.501 0.410 0.308 0.242 0.181 0.150 0.12403166800 (w) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.181 0.144 0.110 0.097 0.085 0.072 0.060 0.048 0.036 0.025 0.023 0.022 0.01203167000 (p) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 92.0 84.0 78.6 74.1 70.1 66.3 62.4 58.1 52.5 48.2 43.7 40.9 38.403167000 (r) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 63.6 53.6 47.1 42.4 38.2 34.5 30.7 27.0 22.5 19.3 16.1 14.3 12.803167000 (w) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 91.4 83.4 77.9 73.5 69.5 65.7 61.8 57.5 51.9 47.7 43.2 40.4 38.003167500 (p) Big Reed Island Creek below Route 693 near Allisonia, 

Va. 

267 63 0 208 184 169 157 146 136 126 115 101 90.3 79.8 73.4 68.0

03167500 (r) Big Reed Island Creek below Route 693 near Allisonia, 

Va. 

267 63 0 114 91.3 76.7 65.2 55.4 46.5 38.0 29.4 19.8 13.7 -- -- --

03167500 (w) Big Reed Island Creek below Route 693 near Allisonia, 

Va. 

267 63 0 206 182 167 155 144 134 124 113 99.6 89.4 -- -- --

03168000 (p) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,479 1,302 1,187 1,097 1,018 945 873 795 698 627 555 511 47503168000 (r) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,218 1,039 924 832 750 673 597 515 418 351 -- -- --03168000 (w) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,473 1,296 1,182 1,091 1,013 940 868 790 694 623 -- -- --03168500 (p) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 4.79 3.12 2.37 1.92 1.60 1.35 1.15 0.970 0.790 0.690 0.610 0.570 0.54003168500 (r) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 13.6 11.2 9.66 8.54 7.56 6.70 5.85 5.00 3.99 3.30 2.64 2.28 1.9803168500 (w) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 5.02 3.33 2.56 2.09 1.75 1.48 1.26 1.07 0.863 0.747 0.653 0.605 0.56803170000 (p) Little River at Route 693 at Graysontown (Graysonton), 

Va. 

309 78 0 183 155 138 124 113 102 91.5 80.3 66.8 57.2 47.8 42.3 37.8

03170000 (r) Little River at Route 693 at Graysontown (Graysonton), 

Va. 

309 78 0 135 108 91.1 77.8 66.3 55.9 46.0 35.8 24.5 17.1 -- -- --

03170000 (w) Little River at Route 693 at Graysontown (Graysonton), 

Va. 

309 78 0 181 154 137 123 112 101 90.7 79.6 66.2 56.7 -- -- --

03171000 (p) New River below Route 11 at Radford, Va. 2,767 75 0 1,700 1,484 1,355 1,258 1,178 1,107 1,039 969 886 828 772 740 71303171000 (r) New River below Route 11 at Radford, Va. 2,767 75 0 1,565 1,344 1,203 1,089 988 893 800 698 577 495 -- -- --03171000 (w) New River below Route 11 at Radford, Va. 2,767 75 0 1,697 1,481 1,352 1,255 1,175 1,103 1,035 964 881 824 -- -- --03171500 (p) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,763 1,559 1,428 1,326 1,238 1,156 1,076 990 883 804 726 678 63703171500 (r) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,689 1,453 1,303 1,182 1,074 973 874 765 636 549 -- -- --03171500 (w) New River at Route 730 at Eggleston, Va. 2,961 61 0 1,761 1,556 1,425 1,323 1,235 1,153 1,073 986 879 801 -- -- --03173000 (p) Walker Creek below Route 100 at Bane, Va. 299 68 0 66.5 55.8 49.9 45.8 42.6 39.9 37.4 35.1 32.5 30.9 29.5 28.8 28.303173000 (r) Walker Creek below Route 100 at Bane, Va. 299 68 0 74.5 62.8 55.4 49.9 45.1 40.8 36.4 32.1 26.8 23.1 19.4 17.2 15.503173000 (w) Walker Creek below Route 100 at Bane, Va. 299 68 0 66.7 56.0 50.1 45.9 42.7 39.9 37.4 35.0 32.4 30.8 29.3 28.6 28.1
Table 4. (7-day averaged, adjusted low flow) 95

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

03175500 (p) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 54.4 45.9 40.7 36.9 33.7 30.9 28.2 25.3 22.0 19.7 17.4 16.1 15.103175500 (r) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 54.5 45.7 40.2 36.1 32.5 29.2 26.0 22.8 18.9 16.2 13.4 11.9 10.603175500 (w) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 54.4 45.9 40.7 36.9 33.7 30.8 28.1 25.3 22.0 19.6 17.4 16.1 15.003176500 (p) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 2,108 1,855 1,693 1,566 1,456 1,354 1,254 1,146 1,012 915 816 757 70703176500 (r) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 2,221 1,925 1,738 1,588 1,452 1,326 1,202 1,067 905 800 -- -- --03176500 (w) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 2,111 1,857 1,694 1,566 1,456 1,354 1,253 1,145 1,011 913 -- -- --03177700 (p) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 15.0 12.7 11.4 10.4 9.53 8.81 8.12 7.43 6.61 6.05 5.51 5.21 4.95

03177700 (r) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 8.66 7.05 6.06 5.32 4.69 4.13 3.58 3.04 2.39 1.96 1.55 1.32 1.14

03177700 (w) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 14.9 12.6 11.2 10.2 9.43 8.71 8.03 7.34 6.53 5.98 5.44 5.14 4.89

03177710 (p) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 14.7 13.6 12.9 12.3 11.7 11.1 10.4 9.68 8.68 7.88 7.01 6.46 5.9703177710 (r) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 9.73 7.94 6.83 6.01 5.30 4.68 4.07 3.45 2.73 2.25 1.78 1.52 1.3103177710 (w) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 14.6 13.5 12.8 12.1 11.5 10.9 10.3 9.56 8.57 7.78 6.92 6.38 5.9003207500 (p) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 22.7 16.1 12.2 9.40 7.22 5.44 3.93 2.61 1.39 0.790 0.390 0.240 0.14003207500 (r) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 44.5 34.1 27.4 22.5 18.5 15.0 11.9 8.79 5.59 3.73 2.27 1.58 1.1203207500 (w) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 38.1 28.5 22.5 18.0 14.3 11.1 8.31 5.70 3.09 1.86 0.953 0.591 0.41103207800 (p) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 50.7 42.6 37.1 32.7 28.8 25.2 21.7 18.0 13.6 10.5 7.77 6.26 5.0903207800 (r) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 54.0 41.2 33.2 27.2 22.4 18.2 14.4 10.8 6.92 4.67 2.89 2.04 1.4603207800 (w) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 52.7 41.8 34.8 29.7 25.4 21.8 18.5 15.1 11.5 8.95 6.71 5.47 4.3703208500 (p) Russell Fork below Route 63 at Haysi, Va. 286 79 0 35.7 24.5 18.2 13.7 10.4 7.73 5.51 3.61 1.90 1.07 0.530 0.320 0.20003208500 (r) Russell Fork below Route 63 at Haysi, Va. 286 79 0 52.2 39.9 32.1 26.3 21.6 17.6 13.9 10.4 6.67 4.49 2.77 1.95 1.3903208500 (w) Russell Fork below Route 63 at Haysi, Va. 286 79 0 47.5 35.3 27.7 22.1 17.6 13.7 10.3 7.08 3.88 2.35 1.22 0.762 0.54203208700 (p) North Fork Pound River below dam at Pound, Va. 18.5 25 0 5.29 4.08 3.20 2.49 1.89 1.38 0.940 0.560 0.240 0.110 0.040 0.020 0.01003208700 (r) North Fork Pound River below dam at Pound, Va. 18.5 25 0 4.60 3.60 2.92 2.39 1.94 1.54 1.17 0.808 0.448 0.261 0.130 0.079 0.04803208700 (w) North Fork Pound River below dam at Pound, Va. 18.5 25 0 4.78 3.73 3.00 2.42 1.92 1.48 1.08 0.698 0.335 0.173 0.071 0.038 0.02203208800 (p) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 7.42 6.93 6.39 5.82 5.21 4.55 3.80 2.95 1.89 1.20 0.650 0.400 0.24003208800 (r) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 8.45 6.57 5.32 4.36 3.54 2.83 2.17 1.53 0.881 0.531 0.280 0.177 0.11203208800 (w) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 8.06 6.71 5.76 5.00 4.32 3.69 3.05 2.37 1.57 1.01 0.566 0.356 0.21303208850 (p) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 12.3 11.0 9.95 9.01 8.11 7.20 6.24 5.16 3.81 2.85 1.96 1.49 1.1303208850 (r) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 13.3 10.3 8.33 6.83 5.56 4.46 3.45 2.47 1.46 0.904 0.495 0.322 0.21003208850 (w) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 12.9 10.6 9.03 7.82 6.79 5.88 5.01 4.11 3.10 2.33 1.65 1.28 0.94903208900 (p) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 16.1 13.6 11.9 10.4 9.02 7.74 6.48 5.14 3.59 2.57 1.69 1.25 0.93003208900 (r) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 16.9 13.1 10.6 8.67 7.07 5.68 4.42 3.18 1.91 1.20 0.672 0.443 0.29403208900 (w) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 16.6 13.3 11.1 9.41 7.98 6.72 5.54 4.35 3.06 2.19 1.46 1.09 0.79803208950 (p) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 14.6 11.6 9.66 8.20 6.98 5.90 4.89 3.87 2.75 2.03 1.42 1.10 0.86003208950 (r) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 14.3 11.1 8.95 7.34 5.98 4.80 3.72 2.66 1.58 0.986 0.543 0.355 0.23303208950 (w) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 14.4 11.3 9.24 7.71 6.44 5.35 4.35 3.37 2.37 1.73 1.22 0.952 0.72703209000 (p) Pound River near Haysi, Va. 221 79 0 54.7 36.2 25.7 18.5 13.2 9.13 5.95 3.44 1.47 0.670 0.250 0.120 0.06003209000 (r) Pound River near Haysi, Va. 221 79 0 41.5 31.8 25.6 21.0 17.2 14.0 11.0 8.17 5.17 3.44 2.08 1.45 1.0203209000 (w) Pound River near Haysi, Va. 221 79 0 44.5 32.8 25.6 20.3 16.1 12.4 9.24 6.26 3.32 1.94 0.959 0.575 0.40603209200 (p) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 116 97.8 83.2 70.5 58.9 48.0 37.4 26.7 15.4 9.08 4.56 2.72 1.6303209200 (r) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 89.6 68.1 54.7 44.9 37.0 30.2 24.2 18.4 12.2 8.47 5.47 3.99 2.9403209200 (w) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 98.9 78.8 65.5 55.2 46.4 38.5 30.9 23.0 14.3 8.89 4.79 3.00 1.93
96 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 7-day averaged, adjusted low flow (ft3/s) 03471500 (p) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 37.0 32.2 29.4 27.2 25.5 23.9 22.5 21.0 19.2 18.0 16.8 16.2 15.6 03471500 (r) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 17.4 14.4 12.4 11.0 9.80 8.70 7.62 6.54 5.25 4.38 3.53 3.05 2.66 03471500 (w) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 36.6 31.8 29.0 26.9 25.2 23.6 22.2 20.7 18.9 17.7 16.6 15.9 15.4 03472500 (p) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 15.6 13.5 11.9 10.7 9.51 8.42 7.31 6.12 4.66 3.64 2.68 2.15 1.74 03472500 (r) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 12.4 10.2 8.76 7.73 6.84 6.05 5.28 4.50 3.58 2.96 2.36 2.03 1.76 03472500 (w) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 15.5 13.4 11.9 10.6 9.45 8.37 7.27 6.09 4.64 3.63 2.67 2.15 1.74 03473000 (p) South Fork Holston River above Route 58 near Damas- cus, Va. 303 75 0 143 124 113 105 97.9 91.7 85.8 79.8 72.6 67.6 62.8 60.0 57.7

03473000 (r) South Fork Holston River above Route 58 near Damascus, Va. 303 75 0 75.5 63.7 56.2 50.7 45.8 41.4 37.0 32.6 27.2 23.5 19.7 17.5 15.803473000 (w) South Fork Holston River above Route 58 near Damascus, Va. 303 75 0 141 123 112 104 96.8 90.7 84.8 78.8 71.7 66.8 62.0 59.3 57.003473500 (p) Middle Fork Holston River at Route 679 at Groseclose, 

Va. 

7.4 11 0 4.28 3.85 3.58 3.38 3.20 3.04 2.89 2.73 2.53 2.39 2.25 2.17 2.10

03473500 (r) Middle Fork Holston River at Route 679 at Groseclose, 

Va. 

7.4 11 0 1.44 1.14 0.961 0.826 0.714 0.615 0.521 0.427 0.321 0.253 0.189 0.157 0.130

03473500 (w) Middle Fork Holston River at Route 679 at Groseclose, 

Va. 

7.4 11 0 4.22 3.79 3.53 3.33 3.15 2.99 2.84 2.69 2.49 2.35 2.21 2.14 2.07

03474000 (p) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 47.9 42.7 39.4 37.0 34.9 33.0 31.2 29.3 26.9 25.3 23.7 22.7 21.9

03474000 (r) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 31.2 25.9 22.6 20.2 18.0 16.1 14.2 12.4 10.1 8.52 6.96 6.10 5.38

03474000 (w) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 47.5 42.3 39.1 36.6 34.5 32.7 30.8 28.9 26.6 25.0 23.4 22.4 21.6

03474500 (p) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 65.6 55.4 49.1 44.3 40.3 36.6 33.1 29.4 25.0 21.9 18.8 17.1 15.6

03474500 (r) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 36.5 30.4 26.6 23.8 21.3 19.1 16.9 14.7 12.0 10.2 8.38 7.36 6.51

03474500 (w) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 64.9 54.8 48.6 43.8 39.8 36.2 32.7 29.1 24.7 21.6 18.7 16.9 15.5

03475000 (p) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 83.7 73.7 67.5 62.8 58.9 55.3 51.8 48.1 43.7 40.5 37.4 35.5 34.003475000 (r) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 50.1 42.0 36.8 33.0 29.7 26.7 23.7 20.8 17.2 14.7 12.2 10.7 9.5703475000 (w) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 83.0 73.0 66.9 62.2 58.3 54.7 51.2 47.6 43.2 40.0 36.9 35.1 33.603477500 (p) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 6.95 5.89 5.27 4.82 4.46 4.14 3.84 3.53 3.18 2.95 2.72 2.59 2.49

03477500 (r) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 2.78 2.23 1.89 1.64 1.42 1.24 1.06 0.876 0.671 0.536 0.409 0.343 0.288

03477500 (w) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 6.86 5.81 5.20 4.75 4.40 4.08 3.78 3.48 3.13 2.91 2.68 2.55 2.45
Table 4. (7-day averaged, adjusted low flow) 97

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

03478400 (p) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 15.2 13.6 12.6 11.8 11.1 10.5 9.89 9.25 8.48 7.92 7.37 7.04 6.7603478400 (r) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 5.72 4.63 3.95 3.46 3.03 2.66 2.29 1.93 1.50 1.22 0.952 0.808 0.68803478400 (w) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 15.0 13.4 12.4 11.6 10.9 10.3 9.74 9.11 8.35 7.80 7.26 6.94 6.6603488000 (p) North Fork Holston River along Route 91 near Saltville, 

Va. 

221 86 0 54.0 45.6 40.7 37.1 34.2 31.6 29.1 26.6 23.7 21.7 19.8 18.7 17.9

03488000 (r) North Fork Holston River along Route 91 near Saltville, 

Va. 

221 86 0 54.0 45.3 39.8 35.7 32.1 28.9 25.7 22.6 18.7 16.0 13.3 11.7 10.5

03488000 (w) North Fork Holston River along Route 91 near Saltville, 

Va. 

221 86 0 54.0 45.6 40.7 37.1 34.1 31.5 29.0 26.5 23.6 21.6 19.7 18.6 17.7

03489500 (p) North Fork Holston River at Route 615 at Mendota, Va. 493 10 0 141 117 102 90.5 81.0 72.6 64.4 56.0 46.0 39.1 32.4 28.6 25.503489500 (r) North Fork Holston River at Route 615 at Mendota, Va. 493 10 0 127 108 95.8 87.0 79.0 71.9 64.6 57.6 48.7 42.6 36.2 32.6 29.603489500 (w) North Fork Holston River at Route 615 at Mendota, Va. 493 10 0 140 116 102 90.4 81.0 72.5 64.4 56.0 46.1 39.1 32.5 28.7 25.603489900 (p) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 18.9 16.0 14.1 12.6 11.4 10.2 9.08 7.89 6.45 5.43 4.45 3.89 3.4203489900 (r) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 18.2 15.0 13.0 11.5 10.2 9.09 7.97 6.84 5.50 4.59 3.70 3.21 2.8003489900 (w) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 18.9 16.0 14.1 12.6 11.3 10.2 9.06 7.87 6.43 5.41 4.44 3.88 3.4103490000 (p) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 151 126 111 100 91.3 83.3 75.6 67.8 58.6 52.2 46.0 42.5 39.6

03490000 (r) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 176 151 134 122 112 102 92.1 82.5 70.4 62.0 53.2 48.2 44.1

03490000 (w) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 152 127 112 101 91.8 83.7 75.9 68.1 58.8 52.3 46.2 42.6 39.6

03521500 (p) Clinch River along Route 707 at Richlands, Va. 137 43 0 36.1 30.8 27.6 25.2 23.2 21.4 19.7 17.9 15.8 14.3 12.8 12.0 11.303521500 (r) Clinch River along Route 707 at Richlands, Va. 137 43 0 32.4 27.0 23.5 21.0 18.8 16.8 14.9 12.9 10.5 8.91 7.30 6.39 5.6503521500 (w) Clinch River along Route 707 at Richlands, Va. 137 43 0 36.0 30.7 27.5 25.1 23.1 21.3 19.6 17.8 15.7 14.2 12.7 11.9 11.203524000 (p) Clinch River above Route 661 at Cleveland, Va. 533 86 0 134 112 99.1 89.6 81.8 74.9 68.4 61.8 54.0 48.7 43.6 40.7 38.203524000 (r) Clinch River above Route 661 at Cleveland, Va. 533 86 0 138 118 104 94.8 86.2 78.5 70.7 63.1 53.5 46.8 39.9 35.9 32.703524000 (w) Clinch River above Route 661 at Cleveland, Va. 533 86 0 134 112 99.2 89.7 81.9 75.0 68.4 61.8 54.0 48.6 43.5 40.6 38.203524500 (p) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 18.4 12.2 9.13 7.17 5.74 4.61 3.66 2.80 1.96 1.47 1.07 0.870 0.72003524500 (r) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 18.2 14.1 11.3 9.31 7.60 6.11 4.75 3.43 2.07 1.31 0.735 0.487 0.32403524500 (w) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 18.3 13.4 10.5 8.46 6.81 5.42 4.20 3.08 2.00 1.42 0.984 0.785 0.62703525000 (p) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03525000 (r) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 9.07 7.40 6.36 5.59 4.93 4.34 3.77 3.20 2.52 2.07 1.64 1.40 1.2103525000 (w) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03526000 (p) Copper Creek at Route 619 near Gate City, Va. 106 26 0 35.7 31.4 28.8 26.8 25.1 23.5 22.0 20.3 18.4 17.0 15.5 14.7 14.003526000 (r) Copper Creek at Route 619 near Gate City, Va. 106 26 0 24.7 20.4 17.8 15.8 14.1 12.6 11.1 9.56 7.75 6.51 5.29 4.61 4.0503526000 (w) Copper Creek at Route 619 near Gate City, Va. 106 26 0 35.4 31.2 28.6 26.5 24.8 23.3 21.7 20.1 18.2 16.8 15.4 14.5 13.803527000 (p) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 269 221 194 173 157 142 129 115 98.9 88.0 77.6 71.7 66.803527000 (r) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 305 263 236 217 199 183 166 151 130 116 101 92.7 85.703527000 (w) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 269 222 194 174 158 143 129 116 99.5 88.5 78.0 72.0 67.103527500 (p) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 3.38 2.64 2.23 1.95 1.73 1.55 1.38 1.22 1.04 0.920 0.810 0.750 0.70003527500 (r) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 4.86 3.92 3.35 2.92 2.56 2.24 1.92 1.61 1.25 1.01 0.787 0.666 0.56503527500 (w) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 3.41 2.67 2.25 1.97 1.75 1.56 1.39 1.23 1.04 0.922 0.810 0.749 0.69803529500 (p) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 34.1 27.4 23.2 20.0 17.4 15.1 12.9 10.6 8.02 6.31 4.76 3.92 3.2703529500 (r) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 22.7 17.5 14.1 11.6 9.47 7.63 5.96 4.33 2.65 1.70 0.973 0.653 0.44103529500 (w) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 27.1 21.5 17.9 15.3 13.2 11.4 9.75 8.09 6.35 5.04 3.92 3.30 2.70
98 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 7-day averaged, adjusted low flow (ft3/s)

03530000 (p) South Fork Powell River at Route 23 at Big Stone Gap, 

Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530000 (r) South Fork Powell River at Route 23 at Big Stone Gap, 

Va. 

39.7 2 0 9.06 7.04 5.70 4.67 3.80 3.03 2.33 1.65 0.951 0.576 0.305 0.194 0.124

03530000 (w) South Fork Powell River at Route 23 at Big Stone Gap, 

Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530500 (p) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 10.1 7.69 6.16 5.00 4.04 3.22 2.47 1.77 1.06 0.660 0.370 0.240 0.160

03530500 (r) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 15.2 11.8 9.50 7.79 6.35 5.10 3.96 2.84 1.69 1.06 0.586 0.384 0.253

03530500 (w) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 13.5 10.3 8.26 6.69 5.38 4.24 3.22 2.25 1.29 0.787 0.426 0.272 0.182

03531000 (p) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 65.2 47.8 38.7 32.5 27.8 23.9 20.4 17.2 13.7 11.4 9.49 8.43 7.6003531000 (r) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 52.9 40.4 32.5 26.7 21.9 17.8 14.1 10.5 6.76 4.56 2.82 1.99 1.4203531000 (w) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 57.6 43.3 35.1 29.2 24.6 20.9 17.6 14.5 11.5 9.51 7.98 7.18 6.3203531500 (p) Powell River at Route 70 near Jonesville, Va. 319 75 0 77.6 64.7 56.7 50.6 45.5 40.9 36.4 31.8 26.3 22.5 18.8 16.7 14.903531500 (r) Powell River at Route 70 near Jonesville, Va. 319 75 0 57.5 43.9 35.3 29.0 23.8 19.4 15.4 11.5 7.43 5.03 3.13 2.22 1.5903531500 (w) Powell River at Route 70 near Jonesville, Va. 319 75 0 65.7 52.6 44.7 39.0 34.4 30.7 27.3 24.0 20.7 17.9 15.5 14.1 12.4
Table 4. (30-day averaged, adjusted low flow) 99

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01484800 (p) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 2 0.340 0.260 0.200 0.170 0.140 0.110 0.080 0.060 0.030 0.000 0.000 0.000 0.000

01484800 (r) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 2 0.833 0.615 0.467 0.362 0.276 0.204 0.145 -- -- -- -- -- --01484800 (w) Guy Creek at Route 606 near Nassawadox, Va. 1.9 32 2 0.395 0.298 0.227 0.189 0.153 0.118 0.085 -- -- -- -- -- --01613900 (p) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 2.56 1.87 1.51 1.27 1.09 0.940 0.810 0.680 0.550 0.460 0.390 0.350 0.32001613900 (r) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 4.39 3.39 2.83 2.44 2.12 1.84 1.59 1.35 1.07 0.891 0.724 0.628 0.55701613900 (w) Hogue Creek at Route 614 near Hayfield, Va. 15.9 38 0 2.60 1.91 1.54 1.30 1.11 0.961 0.828 0.695 0.561 0.469 0.397 0.355 0.32401614830 (p) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 7.99 5.46 4.19 3.35 2.74 2.24 1.82 1.43 1.04 0.810 0.610 0.510 0.43001614830 (r) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 4.19 3.23 2.69 2.32 2.01 1.75 1.51 1.28 1.02 0.844 0.686 0.594 0.52601614830 (w) Opequon Creek at Route 11 near Stephens City, Va. 15.2 6 0 7.89 5.40 4.15 3.32 2.72 2.23 1.81 1.43 1.04 0.811 0.612 0.512 0.43201615000 (p) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 15.7 11.9 9.58 7.93 6.60 5.47 4.44 3.45 2.40 1.75 1.21 0.930 0.73001615000 (r) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 17.1 13.5 11.5 10.1 8.88 7.85 6.90 5.94 4.87 4.14 3.46 3.06 2.7601615000 (w) Opequon Creek above Route 7 near Berryville, Va. 58.2 56 0 15.8 11.9 9.63 7.98 6.66 5.53 4.50 3.51 2.46 1.80 1.26 0.973 0.76901615500 (p) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 3.30 2.95 2.72 2.54 2.38 2.24 2.09 1.93 1.73 1.58 1.43 1.33 1.2601615500 (r) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 1.55 1.18 0.968 0.824 0.706 0.609 0.519 0.433 0.336 0.275 0.219 0.187 0.16301615500 (w) Abrams Creek at railroad bridge at Winchester, Va. 5.89 3 0 3.26 2.91 2.68 2.50 2.35 2.21 2.06 1.90 1.70 1.56 1.41 1.31 1.2401616000 (p) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 15.5 13.6 12.3 11.4 10.6 9.80 9.07 8.29 7.34 6.65 5.97 5.56 5.2101616000 (r) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 4.71 3.64 3.04 2.62 2.28 1.99 1.72 1.45 1.16 0.964 0.785 0.681 0.60401616000 (w) Abrams Creek above Route 659 near Winchester, Va. 17 24 0 15.3 13.4 12.1 11.2 10.4 9.64 8.92 8.16 7.22 6.55 5.88 5.48 5.1401616100 (p) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 7.73 6.65 5.93 5.35 4.85 4.37 3.90 3.40 2.78 2.33 1.90 1.64 1.4401616100 (r) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 2.99 2.29 1.90 1.63 1.41 1.22 1.05 0.884 0.697 0.576 0.464 0.400 0.35301616100 (w) Dry Marsh Run at Route 645 near Berryville, Va. 11 4 0 7.62 6.55 5.84 5.27 4.78 4.30 3.84 3.35 2.74 2.30 1.87 1.62 1.4201620500 (p) North River above Forest Road near Stokesville, Va. 17.3 59 0 3.75 2.34 1.69 1.29 1.01 0.800 0.620 0.470 0.320 0.240 0.180 0.140 0.12001620500 (r) North River above Forest Road near Stokesville, Va. 17.3 59 0 4.80 3.71 3.10 2.67 2.32 2.03 1.75 1.48 1.18 0.984 0.801 0.696 0.61801620500 (w) North River above Forest Road near Stokesville, Va. 17.3 59 0 3.78 2.38 1.73 1.33 1.05 0.836 0.653 0.498 0.343 0.259 0.196 0.153 0.13101621050 (p) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 6.14 3.70 2.62 1.99 1.55 1.22 0.960 0.740 0.520 0.400 0.310 0.260 0.23001621050 (r) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 3.93 3.03 2.52 2.17 1.88 1.64 1.41 1.19 0.947 0.785 0.637 0.552 0.48801621050 (w) Muddy Creek at Route 726 at Mount Clinton, Va. 14.3 13 0 6.07 3.68 2.62 2.00 1.56 1.23 0.973 0.753 0.531 0.410 0.318 0.267 0.23601622000 (p) North River along Route 693 near Burketown, Va. 376 75 0 122 97.6 84.2 74.7 67.3 61.0 55.3 49.7 43.4 39.3 35.6 33.5 31.901622000 (r) North River along Route 693 near Burketown, Va. 376 75 0 120 98.9 86.1 77.4 69.8 62.9 56.7 50.2 43.0 37.8 32.7 29.9 27.601622000 (w) North River along Route 693 near Burketown, Va. 376 75 0 122 97.7 84.2 74.8 67.4 61.0 55.3 49.7 43.4 39.3 35.5 33.5 31.801624000 (p) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 0 0.600 0.370 0.270 0.210 0.160 0.130 0.100 0.080 0.060 0.040 0.030 0.030 0.020

01624000 (r) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 0 2.65 2.03 1.68 1.44 1.24 1.08 0.924 0.775 0.610 0.502 0.405 0.348 0.307

01624000 (w) Bell Creek at Route 732 at Franks Mill near Staunton, 

Va. 

9.81 7 0 0.663 0.420 0.312 0.246 0.192 0.157 0.123 0.099 0.074 0.052 0.039 0.037 0.026

01624300 (p) Middle River at Route 742 near Verona, Va. 179 18 0 70.4 59.8 53.5 48.8 44.9 41.4 38.1 34.7 30.7 27.9 25.2 23.6 22.301624300 (r) Middle River at Route 742 near Verona, Va. 179 18 0 55.3 44.8 38.6 34.4 30.7 27.5 24.5 21.5 18.1 15.7 13.4 12.1 11.001624300 (w) Middle River at Route 742 near Verona, Va. 179 18 0 70.0 59.5 53.1 48.5 44.6 41.1 37.8 34.4 30.4 27.6 24.9 23.4 22.101624800 (p) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 34.0 28.2 24.8 22.3 20.3 18.5 16.9 15.2 13.2 11.9 10.6 9.84 9.2401624800 (r) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 21.6 17.2 14.7 12.9 11.4 10.1 8.91 7.70 6.35 5.42 4.54 4.04 3.6501624800 (w) Christians Creek at Route 794 near Fishersville, Va. 73 29 0 33.8 28.0 24.6 22.1 20.1 18.4 16.7 15.0 13.1 11.7 10.5 9.74 9.1501625000 (p) Middle River at Route 769 near Grottoes, Va. 373 78 0 143 122 109 98.6 89.9 81.8 74.0 65.7 55.7 48.5 41.5 37.4 34.001625000 (r) Middle River at Route 769 near Grottoes, Va. 373 78 0 119 98.0 85.4 76.7 69.1 62.4 56.2 49.8 42.6 37.5 32.4 29.6 27.301625000 (w) Middle River at Route 769 near Grottoes, Va. 373 78 0 143 122 108 98.2 89.4 81.4 73.6 65.4 55.5 48.3 41.4 37.3 33.901625900 (p) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01625900 (r) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 0 18.9 14.2 11.4 9.27 7.60 6.15 4.86 3.61 2.31 1.53 0.927 0.655 0.50601625900 (w) Back Creek at Route 624 at Lyndhurst, Va. 40.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --
100 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 30-day averaged, adjusted low flow (ft3/s) 01626000 (p) South River at Route 664 near Waynesboro, Va. 127 54 0 54.0 44.8 39.8 36.3 33.6 31.3 29.2 27.3 25.1 23.7 22.5 21.9 21.5 01626000 (r) South River at Route 664 near Waynesboro, Va. 127 54 0 38.6 31.1 26.7 23.6 21.0 18.7 16.6 14.5 12.1 10.4 8.85 7.94 7.23 01626000 (w) South River at Route 664 near Waynesboro, Va. 127 54 0 53.6 44.5 39.5 36.1 33.3 31.1 29.0 27.0 24.8 23.5 22.3 21.7 21.2 01626500 (p) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 63.0 53.5 47.9 43.7 40.2 37.1 34.2 31.2 27.6 25.2 22.8 21.5 20.3 01626500 (r) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 40.5 32.7 28.0 24.9 22.1 19.7 17.5 15.3 12.8 11.0 9.36 8.40 7.65 01626500 (w) South River (at Basic City) at Lyndhurst Road at Waynesboro, Va. 133 23 0 62.5 53.1 47.4 43.3 39.8 36.7 33.8 30.9 27.4 24.9 22.6 21.2 20.1 01626850 (p) South River at Hopeman Parkway near Dooms, Va. 148 22 0 86.2 73.7 67.2 62.8 59.6 57.0 54.8 52.8 51.0 50.1 49.6 49.4 49.4 01626850 (r) South River at Hopeman Parkway near Dooms, Va. 148 22 0 45.3 36.6 31.5 27.9 24.9 22.2 19.8 17.3 14.5 12.5 10.6 9.57 8.73 01626850 (w) South River at Hopeman Parkway near Dooms, Va. 148 22 0 85.3 72.9 66.4 62.1 58.9 56.3 54.1 52.2 50.4 49.5 48.9 48.8 48.7 01627500 (p) South River at Route 778 at Harriston, Va. 212 65 0 106 92.8 84.6 78.2 72.9 68.0 63.2 58.2 52.1 47.8 43.4 40.9 38.7 01627500 (r) South River at Route 778 at Harriston, Va. 212 65 0 66.0 53.7 46.4 41.4 37.0 33.2 29.7 26.1 22.0 19.2 16.4 14.8 13.6

01627500 (w) South River at Route 778 at Harriston, Va. 212 65 0 105 92.0 83.8 77.5 72.1 67.3 62.6 57.6 51.6 47.2 43.0 40.4 38.301628060 (p) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 6 0.110 0.060 0.030 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

01628060 (r) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 6 0.674 0.463 0.343 0.261 0.199 0.148 0.106 0.070 0.037 0.020 0.009 0.006 0.004

01628060 (w) White Oak Run 0.15 miles above mouth near Grottoes, 

Va. 

1.95 16 6 0.161 0.095 0.056 0.030 0.015 0.011 0.007 0.004 0.002 0.001 0.000 0.000 0.000

01628500 (p) South Fork Shenandoah River below Lower Lewis Run 

near Lynnwood, Va. 

1,079 75 0 420 350 308 278 253 231 211 190 165 148 132 123 116

01628500 (r) South Fork Shenandoah River below Lower Lewis Run 

near Lynnwood, Va. 

1,079 75 0 362 304 269 245 224 204 186 168 147 132 117 108 101

01628500 (w) South Fork Shenandoah River below Lower Lewis Run 

near Lynnwood, Va. 

1,079 75 0 418 349 308 277 253 231 210 189 165 148 132 123 115

01629500 (p) South Fork Shenandoah River at Route 211 near Luray, 

Va. 

1,372 44 0 582 490 436 397 365 337 311 285 254 233 214 203 193

01629500 (r) South Fork Shenandoah River at Route 211 near Luray, 

Va. 

1,372 44 0 465 393 349 319 292 267 244 221 195 175 156 145 136

01629500 (w) South Fork Shenandoah River at Route 211 near Luray, 

Va. 

1,372 44 0 580 488 434 395 364 336 310 283 253 232 213 202 193

01630700 (p) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 7.83 4.80 3.50 2.72 2.19 1.80 1.48 1.20 0.930 0.780 0.660 0.590 0.55001630700 (r) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 8.89 6.55 5.15 4.13 3.33 2.65 2.04 1.48 0.904 0.573 0.328 0.223 0.17001630700 (w) Gooney Run at Route 622 near Glen Echo, Va. 20.5 4 0 7.86 4.85 3.54 2.76 2.22 1.82 1.49 1.21 0.930 0.777 0.655 0.585 0.54501631000 (p) South Fork Shenandoah River below Route 619 at Front 

Royal, Va. 

1,634 76 0 629 532 476 435 402 373 345 318 286 264 244 232 223

01631000 (r) South Fork Shenandoah River below Route 619 at Front 

Royal, Va. 

1,634 76 0 559 474 421 386 354 324 298 270 239 216 192 180 169

01631000 (w) South Fork Shenandoah River below Route 619 at Front 

Royal, Va. 

1,634 76 0 627 531 475 434 401 372 344 317 285 263 243 231 222

01632000 (p) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 19.7 12.2 8.58 6.35 4.79 3.60 2.65 1.85 1.12 0.730 0.450 0.330 0.250

01632000 (r) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 65.3 53.1 45.9 40.9 36.6 32.9 29.4 25.8 21.8 19.0 16.2 14.7 13.4

01632000 (w) North Fork Shenandoah River above Route 259 at 

Cootes Store, Va. 

210 81 0 21.3 13.6 9.88 7.53 5.88 4.59 3.53 2.62 1.76 1.27 0.904 0.726 0.597
Table 4. (30-day averaged, adjusted low flow) 101

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01632082 (p) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 16.0 12.0 9.93 8.50 7.40 6.48 5.67 4.89 4.05 3.51 3.04 2.77 2.57

01632082 (r) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 13.3 10.5 8.85 7.73 6.80 5.99 5.25 4.51 3.67 3.11 2.58 2.28 2.0501632082 (w) Linville Creek below Route 786 at Broadway, Va. 45.7 20 0 15.9 12.0 9.90 8.48 7.39 6.47 5.66 4.88 4.04 3.50 3.03 2.76 2.5601632900 (p) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 32.0 25.2 21.3 18.5 16.2 14.2 12.4 10.5 8.47 7.10 5.83 5.13 4.5601632900 (r) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 28.1 22.5 19.2 16.9 15.0 13.3 11.8 10.2 8.48 7.28 6.13 5.47 4.9601632900 (w) Smith Creek at Route 616 near New Market, Va. 93.6 45 0 31.9 25.2 21.3 18.4 16.2 14.2 12.4 10.5 8.47 7.10 5.84 5.14 4.5701633000 (p) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 111 84.9 69.4 58.1 49.0 41.2 34.1 27.1 19.5 14.8 10.7 8.53 6.92

01633000 (r) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 165 136 119 108 97.3 88.1 79.6 70.9 61.1 54.0 47.1 43.1 40.0

01633000 (w) North Fork Shenandoah River at Route 698 at Mt. 

Jackson, Va. 

508 63 0 113 86.2 70.6 59.3 50.2 42.4 35.1 28.1 20.5 15.6 11.4 9.21 7.54

01633500 (p) Stony Creek along Route 675 at Columbia Furnace, Va. 77.5 8 0 12.9 11.4 10.5 9.70 9.01 8.37 7.72 7.01 6.12 5.45 4.77 4.36 4.0101633500 (r) Stony Creek along Route 675 at Columbia Furnace, Va. 77.5 8 0 23.0 18.4 15.6 13.8 12.2 10.8 9.53 8.25 6.80 5.82 4.88 4.34 3.9301633500 (w) Stony Creek along Route 675 at Columbia Furnace, Va. 77.5 8 0 13.1 11.6 10.6 9.78 9.08 8.42 7.76 7.03 6.13 5.46 4.77 4.36 4.0101634000 (p) North Fork Shenandoah River at Route 55 near Strasburg, Va. 770 81 0 206 168 146 131 118 107 96.8 86.5 74.7 66.7 59.2 55.0 51.501634000 (r) North Fork Shenandoah River at Route 55 near Strasburg, Va. 770 81 0 254 212 187 169 154 140 127 114 99.2 88.4 77.7 71.7 66.801634000 (w) North Fork Shenandoah River at Route 55 near Strasburg, Va. 770 81 0 207 169 147 131 119 108 97.4 87.0 75.2 67.1 59.6 55.3 51.801634500 (p) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 20.0 15.5 13.1 11.4 10.1 8.97 7.98 7.02 5.96 5.27 4.65 4.31 4.0401634500 (r) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 30.7 24.6 21.1 18.6 16.5 14.7 13.0 11.3 9.38 8.06 6.80 6.07 5.5201634500 (w) Cedar Creek above Route 628 near Winchester, Va. 102 68 0 20.2 15.7 13.2 11.5 10.2 9.09 8.09 7.11 6.03 5.32 4.69 4.34 4.0601635090 (p) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 52.9 38.3 31.4 27.1 24.0 21.5 19.5 17.8 16.0 15.1 14.4 14.1 13.901635090 (r) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 47.2 38.2 32.8 29.2 26.0 23.2 20.7 18.1 15.2 13.1 11.2 10.0 9.1701635090 (w) Cedar Creek above Route 11 near Middletown, Va. 154 6 0 52.8 38.2 31.4 27.1 24.0 21.6 19.6 17.8 16.0 15.0 14.3 14.0 13.801635500 (p) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 9.31 7.25 6.04 5.16 4.45 3.84 3.28 2.72 2.09 1.68 1.31 1.11 0.95001635500 (r) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 25.8 20.6 17.6 15.5 13.8 12.2 10.8 9.35 7.74 6.63 5.57 4.97 4.5001635500 (w) Passage Creek above Route 55 near Buckton, Va. 86.5 74 0 9.71 7.57 6.31 5.40 4.66 4.03 3.45 2.86 2.21 1.78 1.39 1.18 1.0101636210 (p) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 2.16 1.61 1.29 1.06 0.870 0.720 0.580 0.450 0.310 0.220 0.150 0.120 0.09001636210 (r) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 5.85 4.26 3.32 2.64 2.11 1.66 1.26 0.901 0.538 0.333 0.185 0.123 0.09301636210 (w) Happy Creek at Kerfoot Avenue at Front Royal, Va. 14 28 0 2.27 1.68 1.34 1.10 0.899 0.741 0.594 0.459 0.314 0.222 0.150 0.120 0.09001636266 (p) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 7.22 3.95 2.73 2.07 1.66 1.36 1.14 0.960 0.800 0.710 0.660 0.630 0.62001636266 (r) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 2.12 1.50 1.14 0.889 0.695 0.533 0.394 0.270 0.152 0.089 0.046 0.029 0.02101636266 (w) Manassas Run at Route 79 near Linden, Va. 5.54 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01636316 (p) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01636316 (r) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01636316 (w) Spout Run at Route 621 near Millwood, Va. 21.4 4 0 -- -- -- -- -- -- -- -- -- -- -- -- --01638350 (p) South Fork Catoctin Creek at Route 698 near Waterford, 

Va. 

31.6 5 0 16.8 7.51 4.58 3.16 2.33 1.78 1.39 1.09 0.840 0.710 0.630 0.590 0.570

01638350 (r) South Fork Catoctin Creek at Route 698 near Waterford, 

Va. 

31.6 5 0 14.3 10.7 8.48 6.86 5.59 4.50 3.52 2.59 1.63 1.06 0.630 0.439 0.337

01638350 (w) South Fork Catoctin Creek at Route 698 near Waterford, 

Va. 

31.6 5 0 16.7 7.64 4.73 3.30 2.45 1.87 1.46 1.14 0.860 0.718 0.630 0.587 0.566
102 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01638420 (p) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 0 13.3 6.79 3.89 2.30 1.34 0.750 0.380 0.160 0.040 0.010 0.000 0.000 0.000

01638420 (r) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 0 10.1 7.49 5.91 4.75 3.84 3.06 2.37 1.73 1.06 0.679 0.393 0.269 0.205

01638420 (w) North Fork Catoctin Creek at Route 681 bridge near 

Waterford, Va. 

23.1 5 0 12.7 6.92 4.24 2.72 1.75 1.11 0.672 0.382 0.165 0.086 0.040 0.026 0.018

01638480 (p) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 27.3 17.8 12.9 9.65 7.29 5.45 3.94 2.66 1.50 0.910 0.500 0.330 0.23001638480 (r) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 44.7 34.4 28.1 23.3 19.5 16.1 13.0 10.0 6.72 4.68 3.03 2.24 1.7601638480 (w) Catoctin Creek at Route 663 at Taylorstown, Va. 89.5 35 0 28.0 18.5 13.4 10.1 7.69 5.77 4.20 2.86 1.62 0.991 0.548 0.364 0.25501643590 (p) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 4.68 2.94 2.18 1.72 1.41 1.17 0.980 0.810 0.650 0.560 0.480 0.440 0.41001643590 (r) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 3.12 2.23 1.71 1.34 1.06 0.821 0.614 0.427 0.246 0.147 0.078 0.050 0.03701643590 (w) Limestone Branch at Route 15 near Leesburg, Va. 7.88 5 0 4.63 2.92 2.17 1.71 1.40 1.16 0.972 0.802 0.643 0.553 0.474 0.435 0.40501643700 (p) Goose Creek at Route 611 near Middleburg, Va. 122 32 1 40.0 25.6 17.2 11.6 7.60 4.71 2.62 1.17 0.280 0.040 0.000 0.000 0.00001643700 (r) Goose Creek at Route 611 near Middleburg, Va. 122 32 1 62.8 48.8 40.1 33.5 28.2 23.5 19.3 15.0 10.2 7.28 4.83 3.63 2.8901643700 (w) Goose Creek at Route 611 near Middleburg, Va. 122 32 1 42.0 27.6 19.1 13.4 9.17 6.06 3.73 2.06 0.824 0.409 0.218 0.156 0.11201643805 (p) North Fork Goose Creek at Route 729 near Lincoln, Va. 38.1 4 0 25.1 12.9 8.29 5.83 4.29 3.22 2.42 1.77 1.21 0.910 0.690 0.590 0.51001643805 (r) North Fork Goose Creek at Route 729 near Lincoln, Va. 38.1 4 0 17.5 13.2 10.5 8.55 7.00 5.66 4.45 3.30 2.10 1.39 0.836 0.588 0.45401643805 (w) North Fork Goose Creek at Route 729 near Lincoln, Va. 38.1 4 0 24.8 12.9 8.37 5.93 4.38 3.30 2.48 1.81 1.23 0.921 0.693 0.590 0.50901643880 (p) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 0 20.0 6.22 2.96 1.67 1.03 0.660 0.440 0.280 0.170 0.120 0.090 0.080 0.07001643880 (r) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 0 22.2 16.7 13.4 11.0 9.04 7.35 5.83 4.36 2.81 1.88 1.15 0.822 0.63801643880 (w) Beaverdam Creek at Route 734 near Mountville, Va. 47.2 5 0 20.2 7.30 3.98 2.56 1.76 1.23 0.868 0.594 0.343 0.227 0.147 0.118 0.09601644000 (p) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 92.7 56.1 38.6 27.8 20.3 14.7 10.4 6.80 3.72 2.22 1.22 0.810 0.55001644000 (r) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 188 151 127 109 93.6 80.2 67.9 54.9 40.0 30.3 21.9 17.4 14.201644000 (w) Goose Creek above Route 621 near Leesburg, Va. 332 78 0 96.9 60.1 42.1 30.9 23.0 17.0 12.2 8.28 4.66 2.90 1.66 1.15 0.79801644280 (p) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 31.7 20.9 15.5 12.1 9.65 7.70 6.08 4.63 3.20 2.38 1.71 1.39 1.1401644280 (r) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 20.9 15.2 11.7 -- -- -- -- -- -- -- -- -- --01644280 (w) Broad Run at Route 7 near Leesburg, Va. 76.1 5 0 31.1 20.6 15.3 -- -- -- -- -- -- -- -- -- --01644291 (p) Stave Run below Parking Lot Road near Reston, Va. 0.085 10 1 0.030 0.020 0.020 0.010 0.010 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.00001644291 (r) Stave Run below Parking Lot Road near Reston, Va. 0.085 10 1 -- -- -- -- -- -- -- -- -- -- -- -- --01644291 (w) Stave Run below Parking Lot Road near Reston, Va. 0.085 10 1 -- -- -- -- -- -- -- -- -- -- -- -- --01644295 (p) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 2 0.080 0.050 0.030 0.020 0.010 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.00001644295 (r) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 2 -- -- -- -- -- -- -- -- -- -- -- -- --01644295 (w) Smilax Branch at Dulles Airport Road at Reston, Va. 0.33 11 2 -- -- -- -- -- -- -- -- -- -- -- -- --01645784 (p) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 29.7 24.0 20.1 17.1 14.4 12.0 9.74 7.46 4.95 3.40 2.14 1.53 1.1101645784 (r) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 -- -- -- -- -- -- -- -- -- -- -- -- --01645784 (w) Snakeden Branch at Soapstone Drive at Reston, Va. 0.79 71 0 -- -- -- -- -- -- -- -- -- -- -- -- --01646000 (p) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 29.7 24.0 20.1 17.1 14.4 12.0 9.74 7.46 4.95 3.40 2.14 1.53 1.1101646000 (r) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 -- -- -- -- -- -- -- -- -- -- -- -- --01646000 (w) Difficult Run below Route 193 near Great Falls, Va. 57.8 71 0 -- -- -- -- -- -- -- -- -- -- -- -- --01652500 (p) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 6.53 5.42 4.72 4.18 3.73 3.32 2.92 2.51 2.03 1.69 1.37 1.19 1.0401652500 (r) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 4.72 3.36 2.50 1.90 1.43 1.03 0.706 -- -- -- -- -- --01652500 (w) Fourmile Run at Shirlington Road at Alexandria, Va. 12.6 29 0 6.36 5.23 4.53 3.99 3.55 3.16 2.76 -- -- -- -- -- --01653000 (p) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 13.8 10.3 8.38 7.08 6.08 5.23 4.48 3.76 2.98 2.48 2.03 1.79 1.6001653000 (r) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 11.7 8.16 6.02 4.51 3.36 2.41 1.62 -- -- -- -- -- --01653000 (w) Cameron Run below railroad bridge at Alexandria, Va. 33.9 43 0 13.6 10.1 8.16 6.85 5.85 5.02 4.27 -- -- -- -- -- --01654000 (p) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 0 9.74 7.86 6.57 5.53 4.64 3.83 3.07 2.30 1.48 0.980 0.590 0.410 0.28001654000 (r) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --01654000 (w) Accotink Creek above Route 620 near Annandale, Va. 23.9 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --
Table 4. (30-day averaged, adjusted low flow) 103

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01654500 (p) Long Branch (Little Run) at Route 620 near Annandale, 

Va. 

3.72 8 0 2.37 1.86 1.50 1.21 0.970 0.750 0.560 0.380 0.200 0.110 0.050 0.030 0.020

01654500 (r) Long Branch (Little Run) at Route 620 near Annandale, 

Va. 

3.72 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01654500 (w) Long Branch (Little Run) at Route 620 near Annandale, 

Va. 

3.72 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01655000 (p) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 15.1 11.1 8.59 6.77 5.32 4.10 3.04 2.08 1.17 0.690 0.360 0.220 0.140

01655000 (r) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 12.7 8.85 6.52 4.88 3.64 2.61 1.74 -- -- -- -- -- --

01655000 (w) Accotink Creek at Army Engineer Road near Accotink 

Station, Va. 

37.1 6 0 14.8 10.8 8.34 6.55 5.13 3.96 2.91 -- -- -- -- -- --

01655500 (p) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 0 2.75 2.07 1.60 1.24 0.950 0.700 0.480 0.300 0.140 0.060 0.020 0.010 0.01001655500 (r) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 0 5.44 3.95 3.08 2.44 1.95 1.53 1.16 0.826 0.492 0.303 0.167 0.111 0.08301655500 (w) Cedar Run at Route 672 near Warrenton, Va. 13.1 35 0 2.87 2.15 1.66 1.29 0.986 0.728 0.502 0.316 0.149 0.066 0.023 0.012 0.01101656000 (p) Cedar Run at Route 806 near Catlett, Va. 93.4 51 0 9.57 7.33 5.64 4.28 3.15 2.21 1.42 0.780 0.290 0.110 0.030 0.010 0.00001656000 (r) Cedar Run at Route 806 near Catlett, Va. 93.4 51 0 26.3 19.3 14.9 -- -- -- -- -- -- -- -- -- --01656000 (w) Cedar Run at Route 806 near Catlett, Va. 93.4 51 0 11.3 8.51 6.53 -- -- -- -- -- -- -- -- -- --01656100 (p) Cedar Run at Route 611 near Aden, Va. 155 15 0 14.7 8.68 6.03 4.46 3.39 2.60 1.97 1.44 0.950 0.690 0.480 0.390 0.32001656100 (r) Cedar Run at Route 611 near Aden, Va. 155 15 0 46.5 34.6 27.2 -- -- -- -- -- -- -- -- -- --01656100 (w) Cedar Run at Route 611 near Aden, Va. 155 15 0 16.7 10.3 7.32 -- -- -- -- -- -- -- -- -- --01656120 (p) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656120 (r) Cedar Run at Route 646 near Aden, Va. 175 2 0 53.3 39.8 31.4 -- -- -- -- -- -- -- -- -- --01656120 (w) Cedar Run at Route 646 near Aden, Va. 175 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01656500 (p) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 12.6 9.16 7.16 5.75 4.65 3.73 2.92 2.16 1.39 0.950 0.610 0.440 0.33001656500 (r) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 23.7 17.9 14.4 11.8 9.74 7.93 6.30 4.73 3.06 2.05 1.27 0.906 0.70401656500 (w) Broad Run at Route 29 at Buckland, Va. 50.2 34 0 13.0 9.42 7.36 5.91 4.78 3.83 3.00 2.22 1.42 0.969 0.620 0.447 0.33501656650 (p) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 20.1 13.7 10.5 8.31 6.71 5.43 4.33 3.34 2.34 1.75 1.26 1.02 0.84001656650 (r) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 44.7 34.5 28.1 23.3 19.5 16.1 13.1 10.0 6.73 4.69 3.03 2.24 1.7701656650 (w) Broad Run at Route 619 near Bristow, Va. 89.6 11 0 20.8 14.3 10.9 8.70 7.03 5.68 4.52 3.48 2.42 1.80 1.29 1.04 0.85101656700 (p) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 43.7 29.0 21.6 16.8 13.4 10.6 8.29 6.24 4.21 3.06 2.14 1.68 1.36

01656700 (r) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 114 86.5 69.7 -- -- -- -- -- -- -- -- -- --

01656700 (w) Occoquan River (Creek) below Route 234 near 

Manassas, Va. 

343 11 0 47.6 32.1 24.2 -- -- -- -- -- -- -- -- -- --

01656725 (p) Bull Run at Route 705 near Catharpin, Va. 25.7 16 1 3.51 1.93 1.17 0.720 0.440 0.250 0.130 0.050 0.010 0.000 0.000 0.000 0.00001656725 (r) Bull Run at Route 705 near Catharpin, Va. 25.7 16 1 6.19 4.34 3.22 -- -- -- -- -- -- -- -- -- --01656725 (w) Bull Run at Route 705 near Catharpin, Va. 25.7 16 1 3.99 2.35 1.52 -- -- -- -- -- -- -- -- -- --01656960 (p) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 7.89 5.57 4.24 3.31 2.59 2.00 1.50 1.05 0.620 0.380 0.220 0.150 0.10001656960 (r) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 13.0 9.30 7.04 -- -- -- -- -- -- -- -- -- --01656960 (w) Cub Run at Route 658 near Bull Run, Va. 49.7 13 0 8.20 5.79 4.40 -- -- -- -- -- -- -- -- -- --01657000 (p) Bull Run at Route 616 near Manassas, Va. 146 30 0 14.3 9.71 7.17 5.44 4.14 3.10 2.24 1.49 0.820 0.480 0.250 0.160 0.10001657000 (r) Bull Run at Route 616 near Manassas, Va. 146 30 0 43.5 32.3 25.3 -- -- -- -- -- -- -- -- -- --01657000 (w) Bull Run at Route 616 near Manassas, Va. 146 30 0 16.2 11.2 8.32 -- -- -- -- -- -- -- -- -- --01657020 (p) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01657020 (r) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 43.8 32.5 25.5 -- -- -- -- -- -- -- -- -- --01657020 (w) Bull Run at Route 28 near Manassas Park, Va. 147 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --
104 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01657415 (p) Bull Run above Yates Ford near Clifton, Va. 185 11 0 31.5 23.3 19.2 16.5 14.5 12.9 11.5 10.3 8.93 8.13 7.45 7.10 6.85

01657415 (r) Bull Run above Yates Ford near Clifton, Va. 185 11 0 56.8 42.4 33.5 -- -- -- -- -- -- -- -- -- --01657415 (w) Bull Run above Yates Ford near Clifton, Va. 185 11 0 32.7 24.1 19.8 -- -- -- -- -- -- -- -- -- --01657500 (p) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 94.4 77.0 64.2 53.7 44.4 35.9 27.9 20.0 11.8 7.11 3.74 2.33 1.46

01657500 (r) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 201 156 127 -- -- -- -- -- -- -- -- -- --

01657500 (w) Occoquan River (Creek) near Occoquan (site now in 

Occoquan Reservoir), Va. 

570 22 0 100 81.2 67.5 -- -- -- -- -- -- -- -- -- --

01657655 (p) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 1.54 0.760 0.450 0.290 0.190 0.120 0.080 0.040 0.020 0.010 0.010 0.000 0.00001657655 (r) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 1.62 1.18 0.888 0.682 0.518 0.379 0.266 -- -- -- -- -- --01657655 (w) Hooes Run above Route 641 near Occoquan, Va. 3.92 7 0 1.56 0.860 0.550 0.376 0.259 0.168 0.115 -- -- -- -- -- --01658500 (p) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 3 1.13 0.620 0.400 0.270 0.190 0.130 0.090 0.050 0.020 0.000 0.000 0.000 0.00001658500 (r) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 3 -- -- -- -- -- -- -- -- -- -- -- -- --01658500 (w) South Fork Quantico Creek at Route 619 near Independent Hill, Va. 7.62 55 3 -- -- -- -- -- -- -- -- -- -- -- -- --01658698 (p) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01658698 (r) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01658698 (w) Little Creek at Mocking Bird Road at Triangle, Va. 2.06 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01659000 (p) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 0 1.02 0.550 0.350 0.240 0.160 0.110 0.070 0.040 0.020 0.010 0.010 0.000 0.000

01659000 (r) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01659000 (w) North Branch Chopawamsic Creek above Marine Road 

1 near Independent Hill, Va. 

5.69 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01660000 (p) South Branch Chopawamsic Creek below Marine Road 

1 near Garrisonville, Va. 

2.46 8 0 0.680 0.540 0.440 0.350 0.280 0.220 0.160 0.110 0.050 0.030 0.010 0.010 0.000

01660000 (r) South Branch Chopawamsic Creek below Marine Road 

1 near Garrisonville, Va. 

2.46 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01660000 (w) South Branch Chopawamsic Creek below Marine Road 

1 near Garrisonville, Va. 

2.46 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01660100 (p) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 0 10.3 3.56 1.58 0.760 0.380 0.180 0.080 0.030 0.010 0.000 0.000 0.000 0.00001660100 (r) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 0 7.90 5.56 4.12 3.10 2.32 1.67 1.13 -- -- -- -- -- --01660100 (w) Chopawamsic Creek at Russell Road near Joplin, Va. 22.1 5 0 8.47 5.08 3.48 2.49 1.79 1.22 0.819 -- -- -- -- -- --01660400 (p) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 0 11.1 5.95 3.71 2.44 1.63 1.08 0.680 0.390 0.170 0.090 0.040 0.020 0.01001660400 (r) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 0 -- -- -- -- -- -- -- -- -- -- -- -- --01660400 (w) Aquia Creek at Route 641 near Garrisonville, Va. 35 32 0 -- -- -- -- -- -- -- -- -- -- -- -- --01660500 (p) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 2.85 2.03 1.51 1.12 0.820 0.570 0.380 0.220 0.090 0.040 0.010 0.010 0.000

01660500 (r) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01660500 (w) Beaverdam Run at Marine Road 2 near Garrisonville, 

Va. 

13.2 11 0 -- -- -- -- -- -- -- -- -- -- -- -- --
Table 4. (30-day averaged, adjusted low flow) 105

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01661800 (p) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 0 3.76 2.65 1.99 1.52 1.16 0.870 0.620 0.400 0.210 0.120 0.060 0.030 0.020

01661800 (r) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 0 2.67 1.92 1.44 1.10 0.832 0.606 0.420 -- -- -- -- -- --01661800 (w) Bush Mill Stream at Route 601 near Heathsville, Va. 6.77 20 0 3.60 2.55 1.92 1.47 1.12 0.842 0.598 -- -- -- -- -- --01661900 (p) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 7.93 5.07 3.76 2.95 2.39 1.96 1.60 1.28 0.970 0.790 0.640 0.560 0.51001661900 (r) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 8.84 6.51 5.12 4.11 3.31 2.63 2.03 1.47 0.898 0.569 0.326 0.221 0.16801661900 (w) Carter Run off Route 691 near Marshall, Va. 20.4 5 0 7.96 5.11 3.80 2.98 2.41 1.98 1.61 1.28 0.969 0.786 0.635 0.555 0.50601662000 (p) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 65.1 46.2 35.2 27.4 21.3 16.4 12.1 8.29 4.70 2.82 1.52 0.980 0.64001662000 (r) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 105 82.7 68.8 58.1 49.5 41.8 34.7 27.5 19.4 14.2 9.80 7.56 6.0801662000 (w) Rappahannock River at Route 211 near Warrenton, Va. 195 43 0 66.5 47.4 36.2 28.3 22.1 17.0 12.7 8.76 5.00 3.04 1.66 1.09 0.71901662500 (p) Rush River at old Route 522 at Washington, Va. 14.6 23 1 2.83 2.05 1.56 1.19 0.890 0.640 0.430 0.250 0.090 0.010 0.000 0.000 0.00001662500 (r) Rush River at old Route 522 at Washington, Va. 14.6 23 1 6.13 4.47 3.48 2.77 2.22 1.75 1.33 0.951 0.570 0.353 0.197 0.131 0.09901662500 (w) Rush River at old Route 522 at Washington, Va. 14.6 23 1 2.96 2.14 1.63 1.25 0.935 0.675 0.457 0.270 0.102 0.018 0.004 0.002 0.00201662800 (p) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 0 9.74 6.66 4.96 3.81 2.94 2.24 1.65 1.14 0.660 0.410 0.230 0.150 0.10001662800 (r) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 0 11.4 8.48 6.71 5.41 4.39 3.51 2.73 1.99 1.24 0.795 0.464 0.320 0.24401662800 (w) Battle Run at Route 729 near Laurel Mills, Va. 25.8 45 0 9.80 6.72 5.02 3.86 2.98 2.28 1.68 1.16 0.672 0.418 0.234 0.153 0.10201663000 (p) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 74.2 52.4 39.5 30.5 23.4 17.7 12.9 8.58 4.65 2.68 1.36 0.840 0.52001663000 (r) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 72.4 56.5 46.6 39.1 33.0 27.6 22.7 17.7 12.2 8.77 5.88 4.45 3.5501663000 (w) Thornton River at Route 729 near Laurel Mills, Va. 139 12 0 74.1 52.5 39.8 30.7 23.7 18.0 13.1 8.82 4.82 2.80 1.44 0.902 0.56701663500 (p) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 139 95.0 71.1 55.1 43.2 33.5 25.4 18.2 11.3 7.43 4.58 3.28 2.4001663500 (r) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 159 127 107 90.8 78.0 66.6 56.0 45.0 32.5 24.4 17.4 13.7 11.101663500 (w) Hazel River at Route 229 at Rixeyville, Va. 285 53 0 140 96.0 72.2 56.2 44.1 34.4 26.2 18.8 11.7 7.74 4.79 3.44 2.5201664000 (p) Rappahannock River at Route 29 (Alternate) at Remington, Va. 619 64 0 267 175 129 98.3 76.1 58.8 44.4 31.8 19.8 13.3 8.39 6.14 4.6001664000 (r) Rappahannock River at Route 29 (Alternate) at Remington, Va. 619 64 0 372 304 260 226 197 172 149 123 93.4 73.6 56.0 46.0 38.101664000 (w) Rappahannock River at Route 29 (Alternate) at Remington, Va. 619 64 0 270 179 133 102 79.6 61.8 47.0 34.0 21.3 14.4 9.18 6.77 5.0801664500 (p) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 282 229 188 152 121 93.1 67.2 43.2 20.8 10.2 4.02 1.99 0.980

01664500 (r) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 387 316 271 235 206 180 155 129 98.0 77.4 59.0 48.6 40.3

01664500 (w) Rappahannock River at Route 620 at Kellys Ford near 

Remington, Va. 

641 24 0 286 232 191 155 124 95.7 69.6 45.5 22.6 11.6 5.03 2.81 1.60

01665000 (p) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 6.33 5.19 4.39 3.73 3.16 2.64 2.14 1.63 1.06 0.720 0.440 0.310 0.22001665000 (r) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 6.82 4.99 3.90 3.11 2.49 1.97 1.51 1.08 0.651 0.406 0.228 0.153 0.11601665000 (w) Mountain Run at Route 641 near Culpeper, Va. 16.1 47 0 6.34 5.18 4.38 3.71 3.14 2.63 2.13 1.62 1.05 0.715 0.437 0.308 0.21901665500 (p) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 55.9 40.3 31.6 25.5 20.8 16.9 13.5 10.3 6.98 5.01 3.42 2.63 2.0601665500 (r) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 58.8 45.6 37.5 31.3 26.3 21.9 17.9 13.9 9.45 6.69 4.42 3.31 2.6301665500 (w) Rapidan River below Route 29 near Ruckersville, Va. 115 60 0 56.0 40.4 31.7 25.7 21.0 17.0 13.6 10.4 7.02 5.04 3.43 2.64 2.0701666500 (p) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 107 79.2 63.3 51.9 42.9 35.2 28.3 21.8 14.9 10.7 7.26 5.56 4.33

01666500 (r) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 54.7 40.8 32.2 -- -- -- -- -- -- -- -- -- --

01666500 (w) Robinson (Robertson) River at Route 614 near Locust 

Dale, Va. 

179 63 0 105 78.2 62.5 -- -- -- -- -- -- -- -- -- --

01667000 (p) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 167 124 104 91.5 82.8 76.1 70.6 66.0 61.9 59.9 58.7 58.3 58.201667000 (r) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 152 117 95.0 -- -- -- -- -- -- -- -- -- --01667000 (w) Rapidan River below Route 615 at Rapidan, Va. 445 4 0 166 124 104 -- -- -- -- -- -- -- -- -- --
106 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01667500 (p) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 239 181 146 119 97.6 79.1 62.3 46.3 29.7 20.0 12.4 8.83 6.38

01667500 (r) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 161 124 101 -- -- -- -- -- -- -- -- -- --01667500 (w) Rapidan River above Route 522 near Culpeper, Va. 468 75 0 237 180 144 -- -- -- -- -- -- -- -- -- --01667870 (p) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01667870 (r) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 10.1 7.05 5.21 3.91 2.92 2.10 1.41 -- -- -- -- -- --01667870 (w) Mountain Run at Route 611 near Burr Hill, Va. 28.8 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01668000 (p) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 639 483 387 316 259 209 165 122 78.0 52.3 32.3 22.9 16.5

01668000 (r) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 400 258 183 132 94.8 65.8 40.6 -- -- -- -- -- --

01668000 (w) Rappahannock River below Motts Run near 

Fredericksburg, Va. 

1,595 99 0 632 477 382 311 255 206 162 -- -- -- -- -- --

01668500 (p) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 0 18.2 11.7 8.31 6.09 4.49 3.27 2.28 1.47 0.770 0.430 0.220 0.130 0.08001668500 (r) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 0 15.4 10.6 7.83 5.85 4.35 3.11 2.07 -- -- -- -- -- --01668500 (w) Cat Point Creek below Route 637 near Montross, Va. 45.6 55 0 17.8 11.5 8.24 6.06 4.47 3.25 2.26 -- -- -- -- -- --01668800 (p) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 10.4 7.24 5.58 4.46 3.62 2.93 2.34 1.79 1.23 0.910 0.640 0.500 0.41001668800 (r) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 5.67 4.02 2.99 2.26 1.70 1.23 0.836 -- -- -- -- -- --01668800 (w) Hoskins Creek at Route 717 near Tappahannock, Va. 15.4 19 0 9.82 6.89 5.31 4.24 3.44 2.79 2.21 -- -- -- -- -- --01669000 (p) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 0 15.4 12.2 9.80 7.84 6.16 4.68 3.35 2.15 1.04 0.520 0.210 0.110 0.050

01669000 (r) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 0 9.79 6.85 5.06 3.80 2.84 2.04 1.37 -- -- -- -- -- --

01669000 (w) Piscataway Creek at Route 691 near Tappahannock, 

Va. 

27.9 55 0 14.6 11.4 9.17 7.32 5.76 4.40 3.13 -- -- -- -- -- --

01669500 (p) Dragon Swamp at Route 602 near Church View, Va. 86 37 1 34.8 23.8 17.2 12.7 9.19 6.46 4.25 2.44 0.950 0.300 0.000 0.000 0.00001669500 (r) Dragon Swamp at Route 602 near Church View, Va. 86 37 1 27.5 18.8 13.7 10.2 7.54 5.37 3.53 -- -- -- -- -- --01669500 (w) Dragon Swamp at Route 602 near Church View, Va. 86 37 1 33.5 22.9 16.7 12.3 8.95 6.32 4.16 -- -- -- -- -- --01669520 (p) Dragon Swamp at Route 603 at Mascot, Va. 109 25 0 62.2 31.5 18.5 11.5 7.13 4.34 2.48 1.25 0.450 0.180 0.060 0.030 0.01001669520 (r) Dragon Swamp at Route 603 at Mascot, Va. 109 25 0 34.1 23.3 17.0 12.6 9.26 6.58 4.30 -- -- -- -- -- --01669520 (w) Dragon Swamp at Route 603 at Mascot, Va. 109 25 0 52.8 28.8 18.0 11.8 7.75 4.93 2.96 -- -- -- -- -- --01670000 (p) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 0 3.07 2.33 1.81 1.40 1.07 0.790 0.550 0.330 0.150 0.070 0.030 0.010 0.01001670000 (r) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 0 2.81 2.02 1.51 1.15 0.872 0.635 0.440 -- -- -- -- -- --01670000 (w) Beaverdam Swamp above Route 606 near Ark, Va. 7.15 38 0 3.03 2.28 1.77 1.37 1.04 0.772 0.537 -- -- -- -- -- --01670180 (p) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670180 (r) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670180 (w) Pamunkey Creek at Route 669 at Lahore, Va. 41.9 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670300 (p) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 1.37 1.02 0.800 0.640 0.510 0.400 0.300 0.210 0.120 0.070 0.040 0.020 0.01001670300 (r) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670300 (w) Contrary Creek below Route 522 near Mineral, Va. 5.58 10 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670400 (p) North Anna River at Route 601 near Partlow, Va. 342 16 0 54.1 51.8 50.3 49.0 47.9 46.7 45.6 44.3 42.6 41.2 39.7 38.8 38.001670400 (r) North Anna River at Route 601 near Partlow, Va. 342 16 0 -- -- -- -- -- -- -- -- -- -- -- -- --01670400 (w) North Anna River at Route 601 near Partlow, Va. 342 16 0 -- -- -- -- -- -- -- -- -- -- -- -- --01671000 (p) North Anna River near Doswell, Va. 440 56 0 131 106 88.9 74.6 62.2 50.8 40.0 29.3 18.0 11.3 6.34 4.13 2.7201671000 (r) North Anna River near Doswell, Va. 440 56 0 123 81.3 58.4 42.6 31.0 21.8 13.8 -- -- -- -- -- --01671000 (w) North Anna River near Doswell, Va. 440 56 0 130 104 85.7 71.5 59.3 48.4 37.8 -- -- -- -- -- --
Table 4. (30-day averaged, adjusted low flow) 107

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

01671020 (p) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 98.0 77.9 67.7 61.1 56.1 52.1 48.8 45.7 42.7 41.0 39.8 39.3 38.9

01671020 (r) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01671020 (w) North Anna River at Route 30 at Hart Corner, near 

Doswell, Va. 

462 27 0 -- -- -- -- -- -- -- -- -- -- -- -- --

01671100 (p) Little River at Route 685 near Doswell, Va. 107 43 0 26.0 16.2 11.3 8.23 6.05 4.40 3.09 2.02 1.08 0.630 0.340 0.220 0.14001671100 (r) Little River at Route 685 near Doswell, Va. 107 43 0 33.6 22.9 16.7 12.4 9.11 6.47 4.23 -- -- -- -- -- --01671100 (w) Little River at Route 685 near Doswell, Va. 107 43 0 27.2 17.2 12.1 8.80 6.45 4.64 3.23 -- -- -- -- -- --01671500 (p) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 7 1.11 0.890 0.690 0.510 0.350 0.200 0.070 0.000 0.000 0.000 0.000 0.000 0.000

01671500 (r) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 7 -- -- -- -- -- -- -- -- -- -- -- -- --

01671500 (w) Bunch (Hudson) Creek at Route 15 near Boswells 

Tavern, Va. 

4.34 30 7 -- -- -- -- -- -- -- -- -- -- -- -- --

01672000 (p) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672000 (r) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672000 (w) South Anna River at Route 617 at Vontay, Va. 297 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672500 (p) South Anna River at Route 54 near Ashland, Va. 395 68 0 125 92.5 73.4 59.7 48.8 39.6 31.4 23.6 15.6 10.9 7.08 5.25 3.9601672500 (r) South Anna River at Route 54 near Ashland, Va. 395 68 0 -- -- -- -- -- -- -- -- -- -- -- -- --01672500 (w) South Anna River at Route 54 near Ashland, Va. 395 68 0 -- -- -- -- -- -- -- -- -- -- -- -- --01673000 (p) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 325 245 198 164 137 114 93.8 73.9 52.5 39.3 28.0 22.2 17.901673000 (r) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 279 182 129 93.4 67.5 47.0 29.3 -- -- -- -- -- --01673000 (w) Pamunkey River at Route 614 near Hanover, Va. 1,078 65 0 320 238 191 158 131 109 88.7 -- -- -- -- -- --01673500 (p) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 0 1.51 1.02 0.760 0.590 0.460 0.350 0.270 0.190 0.120 0.080 0.050 0.030 0.02001673500 (r) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 0 2.31 1.67 1.25 0.957 0.724 0.529 0.367 -- -- -- -- -- --01673500 (w) Totopotomoy Creek at Route 301 near Atlee, Va. 5.77 28 0 1.61 1.10 0.819 0.632 0.489 0.367 0.279 -- -- -- -- -- --01673550 (p) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 0 12.3 9.59 7.64 6.08 4.77 3.62 2.60 1.68 0.830 0.420 0.180 0.090 0.05001673550 (r) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 0 9.01 6.32 4.67 3.52 2.63 1.89 1.27 -- -- -- -- -- --01673550 (w) Totopotomoy Creek at Route 606 near Studley, Va. 25.5 29 0 11.9 9.14 7.25 5.76 4.52 3.44 2.46 -- -- -- -- -- --01673638 (p) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 10.7 6.21 3.97 2.60 1.66 1.00 0.520 0.160 0.000 0.000 0.000 0.000 0.00001673638 (r) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 3.40 2.44 1.82 1.39 1.05 0.760 0.524 -- -- -- -- -- --01673638 (w) Cohoke Mill Creek near Lester Manor, Va. 8.81 7 1 9.15 5.44 3.55 2.37 1.55 0.962 0.521 -- -- -- -- -- --01673800 (p) Po River at Route 208 near Spotsylvania, Va. 77.6 44 0 15.2 8.87 5.80 3.94 2.68 1.78 1.13 0.640 0.270 0.130 0.050 0.030 0.01001673800 (r) Po River at Route 208 near Spotsylvania, Va. 77.6 44 0 -- -- -- -- -- -- -- -- -- -- -- -- --01673800 (w) Po River at Route 208 near Spotsylvania, Va. 77.6 44 0 -- -- -- -- -- -- -- -- -- -- -- -- --01674000 (p) Mattaponi River above Route 605 near Bowling Green, 

Va. 

256 63 1 58.3 36.7 24.8 17.1 11.6 7.60 4.62 2.40 0.830 0.270 0.020 0.000 0.000

01674000 (r) Mattaponi River above Route 605 near Bowling Green, 

Va. 

256 63 1 74.7 50.0 36.2 26.5 19.4 13.7 8.78 -- -- -- -- -- --

01674000 (w) Mattaponi River above Route 605 near Bowling Green, 

Va. 

256 63 1 62.2 39.8 27.4 19.1 13.2 8.71 5.39 -- -- -- -- -- --

01674500 (p) Mattaponi River near Beulahville, Va. 602 62 0 205 145 111 86.6 67.8 52.4 39.1 27.3 15.9 9.81 5.49 3.64 2.4501674500 (r) Mattaponi River near Beulahville, Va. 602 62 0 164 108 77.2 56.1 40.7 28.5 18.0 -- -- -- -- -- --01674500 (w) Mattaponi River near Beulahville, Va. 602 62 0 199 140 107 83.1 64.9 50.1 37.1 -- -- -- -- -- --01677000 (p) Ware Creek at Route 600 near Toano, Va. 6.29 14 0 3.68 2.85 2.34 1.97 1.66 1.40 1.15 0.910 0.650 0.490 0.340 0.270 0.22001677000 (r) Ware Creek at Route 600 near Toano, Va. 6.29 14 0 2.50 1.80 1.35 1.03 0.781 0.569 0.395 -- -- -- -- -- --01677000 (w) Ware Creek at Route 600 near Toano, Va. 6.29 14 0 3.56 2.74 2.24 1.88 1.58 1.34 1.09 -- -- -- -- -- --
108 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 30-day averaged, adjusted low flow (ft3/s) 02011400 (p) Jackson River along Route 603 near Bacova, Va. 157 31 0 50.4 39.8 34.1 30.3 27.3 24.9 22.7 20.6 18.4 17.0 15.8 15.1 14.6 02011400 (r) Jackson River along Route 603 near Bacova, Va. 157 31 0 48.2 39.0 33.5 29.8 26.6 23.7 21.1 18.5 15.5 13.4 11.4 10.3 9.39 02011400 (w) Jackson River along Route 603 near Bacova, Va. 157 31 0 50.3 39.7 34.1 30.3 27.3 24.9 22.7 20.6 18.3 16.9 15.7 15.0 14.5 02011460 (p) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 14.3 9.89 7.78 6.45 5.50 4.74 4.11 3.53 2.95 2.60 2.31 2.16 2.05 02011460 (r) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 17.9 14.2 12.1 10.6 9.33 8.25 7.26 6.26 5.14 4.37 3.65 3.24 2.92 02011460 (w) Back Creek above Route 600 near Sunrise, Va. 60.9 32 0 14.4 10.00 7.88 6.55 5.59 4.82 4.18 3.59 3.00 2.64 2.34 2.18 2.07 02011470 (p) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 25.4 21.2 18.3 16.0 14.1 12.3 10.5 8.69 6.53 5.07 3.74 3.01 2.45 02011470 (r) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 22.4 17.9 15.2 13.4 11.9 10.5 9.27 8.02 6.61 5.65 4.74 4.21 3.81 02011470 (w) Back Creek at Route 600 at Sunrise, Va. 75.6 22 0 25.3 21.1 18.2 16.0 14.0 12.2 10.5 8.68 6.53 5.08 3.76 3.03 2.47 02011480 (p) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 19.7 14.2 11.4 9.55 8.18 7.07 6.11 5.20 4.25 3.66 3.15 2.88 2.66 02011480 (r) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 26.5 21.2 18.1 15.9 14.1 12.5 11.1 9.61 7.96 6.82 5.74 5.11 4.64 02011480 (w) Back Creek on Route 600, near Mountain Grove, Va. 88.6 10 0 19.8 14.3 11.5 9.70 8.32 7.20 6.22 5.30 4.33 3.72 3.20 2.92 2.70 02011490 (p) Little Back Creek near Sunrise, Va. 4.9 21 0 3.26 2.97 2.78 2.63 2.51 2.38 2.26 2.13 1.97 1.85 1.72 1.64 1.58 02011490 (r) Little Back Creek near Sunrise, Va. 4.9 21 0 1.28 0.968 0.793 0.674 0.576 0.496 0.422 0.350 0.271 0.221 0.175 0.149 0.130

02011490 (w) Little Back Creek near Sunrise, Va. 4.9 21 0 3.22 2.93 2.74 2.59 2.47 2.34 2.22 2.10 1.94 1.82 1.69 1.62 1.5602011500 (p) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 31.8 23.8 19.4 16.4 14.0 12.1 10.3 8.65 6.82 5.65 4.61 4.05 3.6102011500 (r) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 40.8 32.9 28.3 25.1 22.3 19.9 17.7 15.4 12.9 11.1 9.44 8.48 7.7202011500 (w) Back Creek along Route 39 near Mountain Grove, Va. 134 54 0 32.1 24.0 19.6 16.6 14.2 12.3 10.5 8.80 6.95 5.76 4.70 4.13 3.6802011800 (p) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 199 183 170 158 146 134 122 107 87.2 72.0 56.7 47.5 39.9

02011800 (r) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 110 90.2 78.5 70.4 63.4 57.2 51.4 45.5 38.9 34.1 29.5 26.9 24.8

02011800 (w) Jackson River below Gathright Dam, near Hot Springs, 

Va. 

345 32 0 197 181 168 156 144 133 120 106 86.2 71.4 56.2 47.1 39.7

02011950 (p) Johnson Spring near Hot Springs, Va. -- 6 0 0.650 0.580 0.540 0.510 0.490 0.470 0.450 0.430 0.410 0.400 0.380 0.380 0.37002011950 (r) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02011950 (w) Johnson Spring near Hot Springs, Va. -- 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --02012000 (p) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 10.8 9.26 8.39 7.77 7.29 6.87 6.49 6.13 5.72 5.47 5.25 5.13 5.05

02012000 (r) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 3.04 2.34 1.94 1.66 1.44 1.25 1.07 0.902 0.712 0.588 0.475 0.409 0.361

02012000 (w) Falling Spring Creek at Route 220 near Falling Spring, 

Va. 

11.2 3 0 10.7 9.11 8.26 7.64 7.17 6.76 6.38 6.03 5.63 5.38 5.17 5.05 4.98

02012500 (p) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 137 118 107 99.0 92.4 86.6 81.2 75.7 69.3 64.9 60.8 58.5 56.602012500 (r) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 132 108 94.6 85.1 76.8 69.3 62.5 55.5 47.5 41.9 36.3 33.2 30.702012500 (w) Jackson River at Route 687 at Falling Spring, Va. 410 57 0 137 118 107 98.7 92.1 86.3 80.8 75.3 68.9 64.5 60.4 58.1 56.202013000 (p) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 28.6 24.2 21.6 19.7 18.2 16.8 15.6 14.3 12.9 11.9 11.0 10.4 10.002013000 (r) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 49.8 40.3 34.7 30.8 27.5 24.6 21.9 19.2 16.1 13.9 11.9 10.7 9.7602013000 (w) Dunlap Creek at Route 60 near Covington, Va. 162 77 0 29.1 24.5 21.8 19.9 18.4 17.0 15.7 14.4 12.9 11.9 11.0 10.4 10.002013100 (p) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 297 271 251 233 216 198 179 157 128 106 83.0 69.6 58.502013100 (r) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 200 166 146 132 119 108 98.2 87.7 75.9 67.3 58.9 54.2 50.302013100 (w) Jackson River below Dunlap Creek, at Covington, Va. 612 31 0 295 269 249 231 214 196 178 156 127 105 82.6 69.3 58.402014000 (p) Potts Creek at Route 18 near Covington, Va. 153 68 0 43.9 37.1 33.2 30.3 28.0 26.0 24.2 22.3 20.2 18.7 17.4 16.6 16.002014000 (r) Potts Creek at Route 18 near Covington, Va. 153 68 0 46.9 37.9 32.6 29.0 25.8 23.1 20.5 18.0 15.0 13.0 11.1 9.97 9.1002014000 (w) Potts Creek at Route 18 near Covington, Va. 153 68 0 43.9 37.1 33.1 30.3 28.0 26.0 24.1 22.2 20.1 18.6 17.3 16.5 15.902014500 (p) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 4.42 3.44 2.94 2.61 2.36 2.15 1.98 1.82 1.65 1.55 1.46 1.42 1.4002014500 (r) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 3.36 2.58 2.14 1.84 1.59 1.38 1.19 1.00 0.794 0.657 0.531 0.459 0.40502014500 (w) Smith Creek above old dam, near Clifton Forge, Va. 12.3 8 0 4.40 3.42 2.92 2.59 2.34 2.13 1.96 1.80 1.63 1.53 1.44 1.40 1.38
Table 4. (30-day averaged, adjusted low flow) 109

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

02015700 (p) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 53.5 44.5 39.9 36.7 34.4 32.4 30.8 29.3 27.8 27.0 26.4 26.1 26.0

02015700 (r) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 33.2 26.7 22.8 20.2 17.9 16.0 14.1 12.3 10.2 8.81 7.45 6.66 6.0502015700 (w) Bullpasture River at Route 614 at Williamsville, Va. 110 46 0 53.0 44.1 39.5 36.4 34.0 32.1 30.4 28.9 27.5 26.6 26.0 25.8 25.702016000 (p) Cowpasture River below Route 633 near Clifton Forge, 

Va. 

461 81 0 133 112 100 91.7 85.1 79.4 74.2 69.1 63.5 59.9 56.6 54.9 53.6

02016000 (r) Cowpasture River below Route 633 near Clifton Forge, 

Va. 

461 81 0 149 123 107 96.7 87.4 79.0 71.3 63.4 54.5 48.1 41.9 38.3 35.5

02016000 (w) Cowpasture River below Route 633 near Clifton Forge, 

Va. 

461 81 0 134 112 100 91.8 85.1 79.4 74.1 69.0 63.3 59.7 56.4 54.6 53.3

02016500 (p) James River below Route 220 at Lick Run, Va. 1,371 81 0 483 410 366 334 307 284 261 239 212 193 175 165 15602016500 (r) James River below Route 220 at Lick Run, Va. 1,371 81 0 465 393 348 318 291 267 244 221 195 175 156 145 13602016500 (w) James River below Route 220 at Lick Run, Va. 1,371 81 0 483 409 366 334 307 283 261 238 211 193 175 165 15602017000 (p) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 6.19 5.09 4.45 3.99 3.62 3.30 3.00 2.69 2.34 2.10 1.88 1.75 1.6502017000 (r) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 3.64 2.81 2.33 2.01 1.74 1.51 1.30 1.10 0.870 0.721 0.584 0.505 0.44702017000 (w) Meadow Creek above Route 311 at New Castle, Va. 13.3 22 0 6.13 5.04 4.40 3.95 3.58 3.26 2.96 2.66 2.31 2.07 1.86 1.73 1.6302017500 (p) Johns Creek at Route 615 at New Castle, Va. 105 80 0 21.9 18.2 16.1 14.6 13.3 12.2 11.2 10.2 9.02 8.21 7.46 7.03 6.6802017500 (r) Johns Creek at Route 615 at New Castle, Va. 105 80 0 31.6 25.4 21.7 19.2 17.0 15.2 13.4 11.7 9.70 8.34 7.04 6.29 5.7202017500 (w) Johns Creek at Route 615 at New Castle, Va. 105 80 0 22.1 18.4 16.2 14.7 13.4 12.3 11.3 10.2 9.03 8.21 7.45 7.02 6.6602018000 (p) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 78.9 67.0 59.9 54.7 50.4 46.6 42.9 39.2 34.8 31.7 28.8 27.1 25.702018000 (r) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 104 85.8 74.6 66.9 60.2 54.2 48.7 43.1 36.8 32.3 27.9 25.4 23.402018000 (w) Craig Creek at abandoned railroad bridge at Parr, Va. 329 80 0 79.5 67.4 60.3 55.0 50.6 46.7 43.0 39.2 34.8 31.7 28.8 27.1 25.602018500 (p) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 8.34 6.99 6.10 5.39 4.78 4.21 3.66 3.07 2.38 1.90 1.45 1.20 1.0002018500 (r) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 9.82 7.70 6.49 5.65 4.95 4.35 3.80 3.25 2.63 2.21 1.83 1.61 1.4402018500 (w) Catawba Creek at Route 600 near Catawba, Va. 34.3 63 0 8.37 7.01 6.11 5.40 4.78 4.21 3.66 3.07 2.39 1.91 1.46 1.21 1.0102019000 (p) Catawba Creek near Fincastle, Va. 104 8 0 28.1 22.6 19.0 16.4 14.2 12.2 10.3 8.36 6.19 4.77 3.50 2.82 2.3002019000 (r) Catawba Creek near Fincastle, Va. 104 8 0 31.3 25.1 21.5 19.0 16.9 15.0 13.3 11.5 9.59 8.24 6.96 6.22 5.6502019000 (w) Catawba Creek near Fincastle, Va. 104 8 0 28.2 22.6 19.1 16.4 14.2 12.2 10.3 8.43 6.26 4.84 3.57 2.88 2.3602019500 (p) James River at Route 11 at Buchanan, Va. 2,073 96 0 706 604 543 497 458 424 391 357 316 288 260 244 23002019500 (r) James River at Route 11 at Buchanan, Va. 2,073 96 0 716 610 544 500 460 423 389 354 315 286 256 240 22702019500 (w) James River at Route 11 at Buchanan, Va. 2,073 96 0 706 604 543 497 458 424 391 357 316 288 260 244 23002020500 (p) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 19.5 13.7 10.7 8.72 7.23 6.01 4.95 3.97 2.95 2.33 1.80 1.53 1.31

02020500 (r) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 43.1 34.8 29.9 26.5 23.6 21.1 18.7 16.4 13.7 11.8 10.0 9.02 8.23

02020500 (w) Calfpasture River at Route 42 above Mill Creek, at 

Goshen, Va. 

141 66 0 20.1 14.3 11.2 9.17 7.64 6.38 5.29 4.26 3.19 2.54 1.97 1.68 1.44

02021000 (p) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 31.2 24.9 21.3 18.8 16.7 15.0 13.4 11.7 9.90 8.68 7.55 6.91 6.4002021000 (r) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 57.5 46.7 40.3 35.9 32.0 28.7 25.6 22.5 18.9 16.4 14.0 12.6 11.602021000 (w) Calfpasture River below Mill Creek at Goshen, Va. 186 12 0 31.8 25.4 21.8 19.2 17.1 15.3 13.6 12.0 10.1 8.83 7.67 7.01 6.4902021500 (p) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 61.0 47.7 40.3 35.0 30.8 27.2 23.9 20.7 17.1 14.7 12.5 11.2 10.302021500 (r) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 104 85.8 74.6 66.9 60.2 54.2 48.7 43.1 36.8 32.3 27.9 25.4 23.402021500 (w) Maury River above Route 39 at Rockbridge Baths, Va. 329 78 0 62.0 48.6 41.0 35.7 31.5 27.8 24.5 21.2 17.5 15.0 12.8 11.5 10.502022500 (p) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 12.1 10.4 9.35 8.54 7.87 7.25 6.66 6.04 5.30 4.77 4.25 3.94 3.6802022500 (r) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 10.1 7.89 6.65 5.79 5.08 4.46 3.90 3.33 2.70 2.28 1.88 1.65 1.4802022500 (w) Kerrs Creek at Interstate 64 near Lexington, Va. 35.1 77 0 12.1 10.4 9.29 8.48 7.81 7.19 6.60 5.99 5.25 4.72 4.21 3.90 3.64
110 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

02023000 (p) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 126 106 94.0 84.8 77.2 70.3 63.7 56.9 48.7 43.0 37.4 34.1 31.5

02023000 (r) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 155 129 112 101 91.6 82.8 74.8 66.6 57.3 50.6 44.1 40.4 37.4

02023000 (w) Maury (North) River above Route 631 near Lexington, 

Va. 

481 33 0 126 107 94.4 85.2 77.5 70.6 64.0 57.1 48.9 43.1 37.5 34.2 31.5

02023500 (p) South River at Route 631 near Riverside, Va. 112 10 0 32.0 28.3 25.9 24.1 22.5 21.0 19.6 18.0 16.1 14.7 13.2 12.3 11.602023500 (r) South River at Route 631 near Riverside, Va. 112 10 0 57.1 44.3 36.4 30.3 25.5 21.2 17.3 13.4 9.12 6.44 4.25 3.18 2.5202023500 (w) South River at Route 631 near Riverside, Va. 112 10 0 32.5 28.6 26.1 24.2 22.6 21.0 19.5 17.9 16.0 14.5 13.1 12.2 11.502024000 (p) Maury River near Buena Vista, Va. 647 67 0 194 159 139 124 112 101 90.8 80.6 68.7 60.6 52.9 48.5 44.902024000 (r) Maury River near Buena Vista, Va. 647 67 0 212 176 155 140 127 115 105 93.5 81.0 71.9 63.0 58.0 53.902024000 (w) Maury River near Buena Vista, Va. 647 67 0 194 160 139 124 112 101 91.1 80.8 68.9 60.8 53.1 48.7 45.002024500 (p) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 283 243 218 198 181 165 150 134 114 99.9 85.9 77.7 70.802024500 (r) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 518 427 368 322 283 249 217 182 141 113 88.2 73.8 61.502024500 (w) Maury (North) River at Route 130 near Glasgow, Va. 837 7 0 289 247 221 200 183 167 151 135 114 100 85.9 77.6 70.702024915 (p) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 23.2 18.8 15.9 13.7 11.8 10.1 8.43 6.76 4.86 3.62 2.54 1.97 1.5502024915 (r) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 12.1 8.96 7.10 5.73 4.65 3.73 2.90 2.12 1.32 0.853 0.500 0.345 0.26402024915 (w) Pedlar River at Forest Road 39 near Buena Vista, Va. 27.1 4 0 22.9 18.6 15.7 13.5 11.6 9.94 8.33 6.68 4.81 3.58 2.51 1.95 1.5402025000 (p) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 31.2 23.7 19.4 16.3 13.8 11.7 9.75 7.88 5.83 4.53 3.39 2.79 2.3302025000 (r) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 47.5 36.6 29.9 24.9 20.8 17.2 14.0 10.8 7.25 5.07 3.29 2.44 1.9302025000 (w) Pedlar River at Route 635 near Pedlar Mills, Va. 94.6 13 0 31.7 24.0 19.6 16.5 14.0 11.8 9.83 7.93 5.85 4.54 3.39 2.79 2.3302025500 (p) James River at Holcomb(s) Rock, Va. 3,256 79 0 1,144 970 865 787 723 665 610 554 487 441 396 370 34802025500 (r) James River at Holcomb(s) Rock, Va. 3,256 79 0 1,149 987 887 819 758 700 648 594 534 488 441 417 39602025500 (w) James River at Holcomb(s) Rock, Va. 3,256 79 0 1,144 970 865 788 723 666 611 555 488 442 397 371 34902026000 (p) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,475 1,251 1,113 1,007 917 836 758 676 577 508 439 399 36602026000 (r) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,294 1,115 1,003 928 859 795 737 676 610 559 506 479 45602026000 (w) James River above Route 60 at Bent Creek, Va. 3,649 81 0 1,471 1,248 1,110 1,005 916 835 757 676 578 508 441 401 36802026500 (p) Tye River at Roseland, Va. 69 9 0 45.7 34.5 27.5 22.2 17.9 14.2 10.9 7.80 4.68 2.94 1.66 1.10 0.74002026500 (r) Tye River at Roseland, Va. 69 9 0 33.6 25.7 20.8 17.2 14.3 11.7 9.40 7.14 4.72 3.23 2.05 1.49 1.1702026500 (w) Tye River at Roseland, Va. 69 9 0 45.3 34.2 27.3 22.1 17.8 14.2 10.9 7.79 4.68 2.95 1.67 1.11 0.74602027000 (p) Tye River at Route 158 near Lovingston, Va. 93 68 0 58.4 43.8 35.0 28.6 23.5 19.1 15.2 11.4 7.52 5.21 3.36 2.47 1.8402027000 (r) Tye River at Route 158 near Lovingston, Va. 93 68 0 46.6 35.9 29.4 24.4 20.4 16.9 13.7 10.5 7.08 4.94 3.21 2.38 1.8702027000 (w) Tye River at Route 158 near Lovingston, Va. 93 68 0 58.0 43.5 34.8 28.5 23.4 19.1 15.1 11.4 7.51 5.21 3.36 2.47 1.8402027500 (p) Piney River at Route 151 at Piney River, Va. 47.7 57 0 28.7 20.6 16.2 13.2 10.9 9.02 7.37 5.82 4.20 3.21 2.37 1.94 1.6202027500 (r) Piney River at Route 151 at Piney River, Va. 47.7 57 0 22.4 16.9 13.6 11.1 9.16 7.45 5.91 4.42 2.85 1.91 1.17 0.836 0.64902027500 (w) Piney River at Route 151 at Piney River, Va. 47.7 57 0 28.5 20.5 16.1 13.1 10.9 8.99 7.34 5.79 4.18 3.19 2.35 1.93 1.6102027800 (p) Buffalo River at Route 657 near Tye River, Va. 148 34 0 83.5 63.8 52.1 43.5 36.6 30.6 25.1 19.8 14.0 10.4 7.32 5.75 4.5802027800 (r) Buffalo River at Route 657 near Tye River, Va. 148 34 0 77.6 60.6 50.1 42.1 35.6 29.8 24.6 19.2 13.3 9.59 6.47 4.91 3.9202027800 (w) Buffalo River at Route 657 near Tye River, Va. 148 34 0 83.3 63.7 52.1 43.5 36.6 30.6 25.1 19.8 14.0 10.4 7.31 5.74 4.5702028000 (p) Tye (Buffalo) River near Norwood, Va. 355 19 0 188 151 129 112 97.8 85.4 73.7 61.9 48.3 39.1 30.7 26.1 22.402028000 (r) Tye (Buffalo) River near Norwood, Va. 355 19 0 202 162 137 117 101 87.1 73.8 59.9 43.8 33.3 24.2 19.3 15.802028000 (w) Tye (Buffalo) River near Norwood, Va. 355 19 0 188 151 129 112 97.8 85.4 73.7 61.8 48.2 39.0 30.6 26.0 22.302028500 (p) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 50.6 38.3 30.5 24.7 19.9 15.8 12.1 8.58 5.11 3.18 1.77 1.16 0.77002028500 (r) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 47.6 36.7 30.0 24.9 20.9 17.3 14.0 10.8 7.27 5.08 3.30 2.45 1.9302028500 (w) Rockfish River at Route 634 near Greenfield, Va. 94.8 63 0 50.5 38.3 30.5 24.7 19.9 15.8 12.1 8.63 5.15 3.21 1.79 1.18 0.78502029000 (p) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,879 1,549 1,351 1,205 1,085 978 877 774 653 569 490 445 40702029000 (r) James River below Route 20 at Scottsville, Va. 4,581 82 0 2,086 1,727 1,512 -- -- -- -- -- -- -- -- -- --02029000 (w) James River below Route 20 at Scottsville, Va. 4,581 82 0 1,888 1,556 1,358 -- -- -- -- -- -- -- -- -- --
Table 4. (30-day averaged, adjusted low flow) 111

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

02029500 (p) Hardware River at Route 618 near Scottsville, Va. 104 11 0 59.0 45.2 37.3 31.6 27.1 23.3 19.7 16.3 12.5 10.0 7.81 6.62 5.69

02029500 (r) Hardware River at Route 618 near Scottsville, Va. 104 11 0 52.7 40.8 33.4 27.8 23.3 19.4 15.8 12.2 8.24 5.80 3.80 2.83 2.2402029500 (w) Hardware River at Route 618 near Scottsville, Va. 104 11 0 58.8 45.1 37.2 31.5 27.0 23.2 19.7 16.2 12.4 9.95 7.76 6.57 5.6502030000 (p) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 57.5 50.7 44.3 38.1 32.0 26.0 20.0 13.8 7.32 3.87 1.64 0.850 0.440

02030000 (r) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 59.4 46.1 37.9 31.6 26.6 22.1 18.1 14.0 9.57 6.77 4.48 3.36 2.66

02030000 (w) Hardware River at Route 637 below Briery Creek 

(Run), near Scottsville, Va. 

116 66 0 57.5 50.5 44.1 37.9 31.9 25.9 19.9 13.8 7.36 3.92 1.68 0.887 0.470

02030500 (p) Slate River above Route 676 near Arvonia, Va. 226 67 0 103 79.5 64.9 53.9 45.0 37.2 30.1 23.2 15.7 11.2 7.39 5.54 4.2102030500 (r) Slate River above Route 676 near Arvonia, Va. 226 67 0 -- -- -- -- -- -- -- -- -- -- -- -- --02030500 (w) Slate River above Route 676 near Arvonia, Va. 226 67 0 -- -- -- -- -- -- -- -- -- -- -- -- --02031000 (p) Mechums River at Route 614 near White Hall (Ivy), Va. 95.3 36 0 30.8 30.7 30.1 28.5 25.8 21.9 16.9 10.9 4.41 1.53 0.320 0.080 0.02002031000 (r) Mechums River at Route 614 near White Hall (Ivy), Va. 95.3 36 0 47.9 36.9 30.2 25.1 21.0 17.4 14.1 10.9 7.32 5.12 3.33 2.47 1.9502031000 (w) Mechums River at Route 614 near White Hall (Ivy), Va. 95.3 36 0 31.5 31.0 30.1 28.3 25.6 21.7 16.8 10.9 4.49 1.62 0.384 0.128 0.05502031500 (p) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 1 1.69 1.31 1.01 0.770 0.560 0.370 0.220 0.090 0.000 0.000 0.000 0.000 0.000

02031500 (r) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 1 4.58 3.31 2.57 2.03 1.61 1.26 0.955 0.674 0.397 0.242 0.132 0.087 0.065

02031500 (w) North Fork Moormans River above Charlottesville 

Reservoir near White Hall, Va. 

11.2 11 1 1.84 1.41 1.08 0.827 0.605 0.406 0.247 0.111 0.012 0.007 0.003 0.002 0.001

02032250 (p) Moormans River at Route 601 near Free Union, Va. 77 18 0 19.4 13.1 9.85 7.68 6.06 4.77 3.68 2.70 1.75 1.21 0.790 0.590 0.45002032250 (r) Moormans River at Route 601 near Free Union, Va. 77 18 0 37.9 29.1 23.6 19.5 16.3 13.4 10.8 8.24 5.48 3.78 2.41 1.77 1.3902032250 (w) Moormans River at Route 601 near Free Union, Va. 77 18 0 20.0 13.6 10.3 8.02 6.34 4.99 3.85 2.83 1.82 1.26 0.815 0.608 0.46302032400 (p) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 12.8 9.21 7.20 5.80 4.71 3.82 3.03 2.29 1.54 1.10 0.740 0.570 0.440

02032400 (r) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 15.7 11.8 9.38 7.61 6.21 5.01 3.93 2.90 1.84 1.20 0.720 0.504 0.388

02032400 (w) Buck Mountain Creek at Route 665 near Free Union, 

Va. 

34.5 17 0 12.9 9.28 7.26 5.85 4.75 3.85 3.05 2.30 1.55 1.10 0.740 0.569 0.439

02032500 (p) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 60.2 42.1 32.4 25.7 20.6 16.5 13.0 9.69 6.42 4.53 3.02 2.30 1.7802032500 (r) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 117 92.3 77.0 65.2 55.6 47.1 39.3 31.2 22.2 16.3 11.4 8.81 7.1002032500 (w) South Fork Rivanna River at Route 660 near Earlysville, Va. 215 13 0 62.0 43.6 33.6 26.8 21.5 17.2 13.5 10.2 6.71 4.73 3.14 2.39 1.8502032515 (p) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 98.4 73.3 59.1 49.2 41.3 34.7 28.8 23.0 16.9 13.0 9.72 7.98 6.6502032515 (r) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 143 114 95.4 81.1 69.5 59.2 49.7 39.8 28.5 21.3 15.0 11.8 9.5402032515 (w) South Fork Rivanna River at Route 29 near Charlottesville, Va. 259 17 0 99.6 74.3 60.0 49.9 42.0 35.2 29.2 23.4 17.1 13.2 9.79 8.03 6.68
112 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

02032640 (p) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 46.3 33.6 25.7 19.9 15.3 11.5 8.30 5.44 2.84 1.56 0.740 0.430 0.250

02032640 (r) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 54.9 42.5 34.9 29.1 24.4 20.3 16.5 12.8 8.68 6.12 4.02 3.00 2.3802032640 (w) North Fork Rivanna River at Route 606 near Earlysville, Va. 108 13 0 46.7 33.9 26.0 20.2 15.6 11.8 8.53 5.64 2.97 1.66 0.800 0.475 0.28402032680 (p) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 85.9 63.0 49.9 40.6 33.3 27.2 21.8 16.6 11.3 8.08 5.47 4.18 3.25

02032680 (r) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 92.6 72.8 60.4 50.9 43.2 36.4 30.1 23.7 16.6 12.1 8.26 6.33 5.07

02032680 (w) North Fork Rivanna River at Route 649 near Proffit, 

Va. 

174 22 0 86.1 63.3 50.2 40.9 33.6 27.4 21.9 16.8 11.4 8.14 5.51 4.21 3.27

02033500 (p) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 87.2 66.7 54.3 45.3 37.9 31.6 25.8 20.2 14.1 10.3 7.16 5.55 4.3702033500 (r) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 296 240 205 177 154 133 114 94.1 70.4 54.8 40.9 33.3 27.402033500 (w) Rivanna River below Moores Creek near Charlottesville, Va. 503 4 0 93.0 71.2 58.0 48.5 40.6 33.8 27.6 21.6 15.0 11.0 7.61 5.90 4.6302034000 (p) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 292 222 180 148 123 101 81.2 62.1 41.7 29.4 19.4 14.5 11.002034000 (r) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 401 328 282 245 214 187 162 135 103 81.2 62.1 51.3 42.502034000 (w) Rivanna River at Route 15 at Palmyra, Va. 663 71 0 295 225 182 151 125 103 82.9 63.5 42.7 30.2 20.0 14.9 11.302034500 (p) Willis River at Route 690 at Lakeside Village (Flanagan 

Mills), Va. 

262 56 0 88.3 67.9 55.1 45.5 37.6 30.7 24.5 18.4 12.0 8.15 5.12 3.67 2.67

02034500 (r) Willis River at Route 690 at Lakeside Village (Flanagan 

Mills), Va. 

262 56 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02034500 (w) Willis River at Route 690 at Lakeside Village (Flanagan 

Mills), Va. 

262 56 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02035000 (p) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,613 2,139 1,853 1,639 1,463 1,305 1,156 1,004 826 704 588 522 46802035000 (r) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,958 2,474 2,187 -- -- -- -- -- -- -- -- -- --02035000 (w) James River at Route 45 at Cartersville, Va. 6,252 108 0 2,628 2,153 1,866 -- -- -- -- -- -- -- -- -- --02036500 (p) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 7.56 5.53 4.27 3.35 2.61 1.99 1.46 0.980 0.530 0.310 0.150 0.090 0.06002036500 (r) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 -- -- -- -- -- -- -- -- -- -- -- -- --02036500 (w) Fine Creek at Route 711 at Fine Creek Mills, Va. 22.4 62 0 -- -- -- -- -- -- -- -- -- -- -- -- --02037500 (p) James River above Route 147 near Richmond, Va. 6,753 72 0 2,659 2,069 1,664 1,345 1,077 841 628 430 236 134 65.5 38.7 23.102037500 (r) James River above Route 147 near Richmond, Va. 6,753 72 0 3,225 2,704 2,397 -- -- -- -- -- -- -- -- -- --02037500 (w) James River above Route 147 near Richmond, Va. 6,753 72 0 2,693 2,106 1,705 -- -- -- -- -- -- -- -- -- --02038000 (p) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 6.30 5.62 4.93 4.24 3.56 2.87 2.17 1.47 0.740 0.370 0.140 0.070 0.03002038000 (r) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 11.4 7.99 5.89 4.42 3.29 2.37 1.59 -- -- -- -- -- --02038000 (w) Falling Creek at Route 651 near Chesterfield, Va. 33.1 38 0 6.96 5.91 5.04 4.26 3.53 2.82 2.11 -- -- -- -- -- --02038500 (p) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 13.7 9.65 7.22 5.50 4.17 3.09 2.19 1.41 0.720 0.390 0.180 0.110 0.060

02038500 (r) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 17.7 12.2 8.99 6.71 4.98 3.56 2.36 -- -- -- -- -- --

02038500 (w) Falling Creek at Hopkins Road near Drewrys Bluff, 

Va. 

53.3 19 0 14.3 10.0 7.47 5.66 4.27 3.14 2.21 -- -- -- -- -- --
Table 4. (30-day averaged, adjusted low flow) 113

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

02038850 (p) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 3.83 3.36 2.93 2.53 2.14 1.76 1.37 0.980 0.550 0.310 0.140 0.080 0.040

02038850 (r) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02038850 (w) Holiday Creek above Route 614 near Andersonville, 

Va. 

8.54 39 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02039000 (p) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 33.4 29.6 26.3 23.2 20.3 17.4 14.4 11.1 7.25 4.78 2.78 1.84 1.2202039000 (r) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 -- -- -- -- -- -- -- -- -- -- -- -- --02039000 (w) Buffalo Creek at Route 658 near Hampden Sydney, Va. 69.6 60 0 -- -- -- -- -- -- -- -- -- -- -- -- --02039500 (p) Appomattox River at Route 45 at Farmville, Va. 302 79 0 126 108 94.1 82.6 72.0 61.8 51.7 40.9 28.2 20.0 12.9 9.32 6.7902039500 (r) Appomattox River at Route 45 at Farmville, Va. 302 79 0 -- -- -- -- -- -- -- -- -- -- -- -- --02039500 (w) Appomattox River at Route 45 at Farmville, Va. 302 79 0 -- -- -- -- -- -- -- -- -- -- -- -- --02040000 (p) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 261 211 178 151 129 109 89.3 69.8 48.0 34.2 22.6 16.8 12.602040000 (r) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 -- -- -- -- -- -- -- -- -- -- -- -- --02040000 (w) Appomattox River at railroad bridge at Mattoax, Va. 725 80 0 -- -- -- -- -- -- -- -- -- -- -- -- --02041000 (p) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 48.3 34.0 25.5 19.6 14.9 11.2 8.05 5.30 2.81 1.58 0.780 0.470 0.29002041000 (r) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 -- -- -- -- -- -- -- -- -- -- -- -- --02041000 (w) Deep Creek above Route 153 near Mannboro, Va. 158 60 0 -- -- -- -- -- -- -- -- -- -- -- -- --02041500 (p) Appomattox River near Petersburg, Va. 1,333 36 0 452 372 317 273 235 200 166 131 90.7 65.1 43.2 32.1 24.102041500 (r) Appomattox River near Petersburg, Va. 1,333 36 0 -- -- -- -- -- -- -- -- -- -- -- -- --02041500 (w) Appomattox River near Petersburg, Va. 1,333 36 0 -- -- -- -- -- -- -- -- -- -- -- -- --02041650 (p) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 382 277 220 181 150 125 103 81.6 59.3 45.6 34.0 27.9 23.302041650 (r) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 -- -- -- -- -- -- -- -- -- -- -- -- --02041650 (w) Appomattox River at Route 600 at Matoaca, Va. 1,342 37 0 -- -- -- -- -- -- -- -- -- -- -- -- --02042500 (p) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 82.8 59.8 44.9 34.0 25.3 18.2 12.4 7.43 3.31 1.54 0.590 0.290 0.140

02042500 (r) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 73.4 49.1 35.5 26.1 19.1 13.5 8.64 -- -- -- -- -- --

02042500 (w) Chickahominy River at Route 618 near Providence 

Forge, Va. 

251 65 0 81.2 58.0 43.4 32.8 24.4 17.6 11.9 -- -- -- -- -- --

02044000 (p) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 1 7.15 5.06 3.79 2.89 2.18 1.61 1.12 0.700 0.320 0.120 0.000 0.000 0.00002044000 (r) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 1 -- -- -- -- -- -- -- -- -- -- -- -- --02044000 (w) Nottoway River at Route 723 near Burkeville, Va. 38.7 39 1 -- -- -- -- -- -- -- -- -- -- -- -- --02044500 (p) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 117 88.7 70.3 56.4 45.0 35.3 26.6 18.5 10.6 6.36 3.37 2.13 1.3602044500 (r) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 -- -- -- -- -- -- -- -- -- -- -- -- --02044500 (w) Nottoway River at Route 612 near Rawlings, Va. 317 56 0 -- -- -- -- -- -- -- -- -- -- -- -- --02045500 (p) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 198 140 107 84.7 67.6 53.7 41.6 30.6 19.6 13.4 8.53 6.26 4.6902045500 (r) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 157 104 74.3 54.0 39.3 27.5 17.3 -- -- -- -- -- --02045500 (w) Nottoway River at Route 301 near Stony Creek, Va. 577 75 0 193 135 103 81.5 64.8 51.4 39.4 -- -- -- -- -- --02046000 (p) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 27.0 16.7 11.5 8.13 5.78 4.03 2.69 1.62 0.770 0.390 0.170 0.100 0.06002046000 (r) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --02046000 (w) Stony Creek at Route 1 near (at) Dinwiddie, Va. 113 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --02047000 (p) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 377 246 182 141 112 88.9 69.8 53.0 36.4 26.9 19.3 15.6 12.802047000 (r) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 364 236 167 121 86.8 60.3 37.3 -- -- -- -- -- --02047000 (w) Nottoway River above Route 653 near Sebrell, Va. 1,441 65 0 375 244 180 139 109 86.3 66.9 -- -- -- -- -- --02047500 (p) Blackwater River at Route 617 near Dendron, Va. 290 61 15 67.6 35.3 19.3 10.2 4.77 1.71 0.250 0.000 0.000 0.000 0.000 0.000 0.00002047500 (r) Blackwater River at Route 617 near Dendron, Va. 290 61 15 83.8 55.9 40.4 29.6 21.6 15.2 9.75 -- -- -- -- -- --02047500 (w) Blackwater River at Route 617 near Dendron, Va. 290 61 15 74.4 43.8 27.7 17.7 11.0 6.30 3.53 -- -- -- -- -- --
114 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 30-day averaged, adjusted low flow (ft3/s) 02048000 (p) Blackwater River at Route 460 at Zuni, Va. 451 45 1 83.0 47.5 29.1 18.0 10.9 6.16 3.11 1.24 0.260 0.040 0.000 0.000 0.000 02048000 (r) Blackwater River at Route 460 at Zuni, Va. 451 45 1 126 83.1 59.7 43.6 31.7 22.2 14.1 -- -- -- -- -- -- 02048000 (w) Blackwater River at Route 460 at Zuni, Va. 451 45 1 102 63.0 42.0 28.4 19.0 11.9 7.13 -- -- -- -- -- -- 02049500 (p) Blackwater River near Franklin, Va. 613 60 0 118 57.5 34.5 22.4 15.0 10.1 6.62 4.07 2.09 1.22 0.670 0.450 0.320 02049500 (r) Blackwater River near Franklin, Va. 613 60 0 166 109 78.4 57.0 41.4 28.9 18.2 -- -- -- -- -- -- 02049500 (w) Blackwater River near Franklin, Va. 613 60 0 129 68.5 43.3 29.0 19.8 13.2 8.55 -- -- -- -- -- -- 02050500 (p) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 2.51 1.83 1.45 1.19 0.980 0.810 0.660 0.520 0.370 0.280 0.200 0.160 0.130 02050500 (r) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 02050500 (w) North Meherrin River at Route 687 near Keysville, Va. 9.06 12 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 02051000 (p) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 0 10.6 8.36 6.72 5.41 4.29 3.30 2.41 1.59 0.810 0.430 0.190 0.100 0.060 02051000 (r) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 02051000 (w) North Meherrin River at Route 40 near Lunenburg, Va. 56 59 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 02051500 (p) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 167 130 106 88.0 72.9 59.6 47.3 35.3 22.7 15.2 9.34 6.58 4.69 02051500 (r) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02051500 (w) Meherrin River at Route 715 near Lawrenceville, Va. 552 78 0 -- -- -- -- -- -- -- -- -- -- -- -- --02051600 (p) Great Creek at Route 763 (old Route 618) near Cochran, Va. 30.8 27 0 9.83 7.47 5.96 4.82 3.89 3.08 2.35 1.67 0.990 0.610 0.340 0.220 0.14002051600 (r) Great Creek at Route 763 (old Route 618) near Cochran, Va. 30.8 27 0 -- -- -- -- -- -- -- -- -- -- -- -- --02051600 (w) Great Creek at Route 763 (old Route 618) near Cochran, Va. 30.8 27 0 -- -- -- -- -- -- -- -- -- -- -- -- --02052000 (p) Meherrin River at Route 301 at Emporia, Va. 744 56 0 207 156 126 104 86.9 71.8 58.1 44.8 30.8 22.2 15.1 11.5 8.9402052000 (r) Meherrin River at Route 301 at Emporia, Va. 744 56 0 199 130 93.1 67.5 48.9 34.2 21.5 -- -- -- -- -- --02052000 (w) Meherrin River at Route 301 at Emporia, Va. 744 56 0 206 154 123 101 83.4 68.8 55.1 -- -- -- -- -- --02052500 (p) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 5 8.15 5.68 3.94 2.64 1.65 0.920 0.410 0.100 0.000 0.000 0.000 0.000 0.000

02052500 (r) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 5 22.4 15.4 11.3 8.38 6.20 4.43 2.92 -- -- -- -- -- --

02052500 (w) Fountains (Fontaine) Creek at Route 603 near Brink, 

Va. 

68.7 42 5 12.7 8.68 6.12 4.29 2.90 1.79 1.04 -- -- -- -- -- --

02053000 (p) Fountains (Fontaine) Creek at Route 639 near Emporia, 

Va. 

95.9 9 0 29.7 20.2 15.1 11.7 9.10 7.03 5.28 3.74 2.26 1.46 0.880 0.620 0.440

02053000 (r) Fountains (Fontaine) Creek at Route 639 near Emporia, 

Va. 

95.9 9 0 30.4 20.7 15.1 11.2 8.28 5.89 3.86 -- -- -- -- -- --

02053000 (w) Fountains (Fontaine) Creek at Route 639 near Emporia, 

Va. 

95.9 9 0 29.8 20.3 15.1 11.6 9.01 6.92 5.14 -- -- -- -- -- --

02053800 (p) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 46.5 38.9 34.3 30.8 27.8 25.2 22.6 20.0 16.9 14.6 12.5 11.3 10.3

02053800 (r) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 55.5 43.0 35.2 29.4 24.7 20.5 16.7 12.9 8.79 6.20 4.08 3.04 2.41

02053800 (w) South Fork Roanoke River at Route 637 near 

Shawsville, Va. 

109 46 0 46.7 39.0 34.3 30.8 27.8 25.1 22.5 19.9 16.7 14.5 12.4 11.2 10.2

02054500 (p) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 84.3 70.4 62.2 56.2 51.3 46.9 42.9 38.7 33.9 30.6 27.4 25.6 24.102054500 (r) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 79.7 65.1 56.4 50.4 45.2 40.6 36.4 32.1 27.2 23.8 20.4 18.5 17.002054500 (w) Roanoke River at Route 603 at Lafayette, Va. 254 62 0 84.2 70.3 62.0 56.0 51.1 46.8 42.7 38.6 33.8 30.4 27.3 25.5 24.002054530 (p) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 107 87.4 75.6 66.9 59.8 53.5 47.5 41.5 34.5 29.7 25.1 22.5 20.402054530 (r) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 88.6 72.5 62.9 56.3 50.6 45.5 40.8 36.0 30.6 26.8 23.1 20.9 19.302054530 (w) Roanoke River at Route 1154 at Glenvar, Va. 281 14 0 107 87.1 75.3 66.7 59.6 53.3 47.4 41.4 34.4 29.6 25.1 22.5 20.4
Table 4. (30-day averaged, adjusted low flow) 115

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

02055000 (p) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 135 112 97.8 87.6 79.1 71.6 64.4 57.1 48.5 42.5 36.8 33.5 30.8

02055000 (r) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 123 101 88.1 79.2 71.4 64.4 58.0 51.5 44.0 38.8 33.6 30.7 28.302055000 (w) Roanoke River at Walnut Street at Roanoke, Va. 384 107 0 134 111 97.6 87.4 78.9 71.4 64.3 57.0 48.4 42.5 36.8 33.5 30.802055100 (p) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 5.68 4.50 3.78 3.25 2.80 2.41 2.05 1.68 1.26 0.990 0.740 0.610 0.51002055100 (r) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 3.19 2.45 2.03 1.74 1.51 1.31 1.13 0.948 0.749 0.619 0.500 0.432 0.38102055100 (w) Tinker Creek below railroad bridge near Daleville, Va. 11.7 49 0 5.62 4.45 3.74 3.22 2.77 2.38 2.03 1.66 1.25 0.983 0.735 0.607 0.50802056000 (p) Roanoke River below powerplant at Niagara, Va. 509 80 0 214 186 169 156 145 134 124 113 99.8 90.1 80.6 74.9 70.002056000 (r) Roanoke River below powerplant at Niagara, Va. 509 80 0 165 137 119 108 97.5 88.2 79.8 71.0 61.2 54.1 47.2 43.2 40.102056000 (w) Roanoke River below powerplant at Niagara, Va. 509 80 0 213 185 168 155 144 133 123 112 99.0 89.5 80.0 74.3 69.502056650 (p) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 19.6 15.5 13.0 11.2 9.74 8.46 7.26 6.07 4.71 3.82 3.01 2.56 2.2102056650 (r) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 26.6 20.2 16.3 13.4 11.1 9.03 7.20 5.42 3.53 2.39 1.49 1.07 0.83302056650 (w) Back Creek at Route 660 near Dundee, Va. 55.8 32 0 19.8 15.6 13.1 11.3 9.77 8.47 7.26 6.06 4.69 3.80 2.99 2.54 2.2002056900 (p) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 67.0 54.3 46.3 40.3 35.3 30.8 26.4 22.1 17.0 13.6 10.4 8.72 7.3602056900 (r) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 58.8 45.6 37.5 31.3 26.3 21.9 17.9 13.9 9.45 6.69 4.42 3.31 2.6302056900 (w) Blackwater River at Route 122 near Rocky Mount, Va. 115 30 0 66.7 54.0 46.1 40.1 35.1 30.6 26.3 21.9 16.9 13.5 10.4 8.66 7.3102057000 (p) Blackwater River near Union Hall, Va. 208 37 0 135 115 101 89.2 79.2 69.9 60.6 50.7 38.9 30.7 23.0 18.8 15.402057000 (r) Blackwater River near Union Hall, Va. 208 37 0 113 88.9 74.1 62.7 53.5 45.3 37.7 29.9 21.2 15.6 10.8 8.36 6.7402057000 (w) Blackwater River near Union Hall, Va. 208 37 0 134 114 99.9 88.6 78.7 69.4 60.2 50.4 38.6 30.5 22.8 18.6 15.302057500 (p) Roanoke River near Toshes, Va. 1,017 36 0 489 410 361 323 291 263 235 205 171 146 123 109 97.602057500 (r) Roanoke River near Toshes, Va. 1,017 36 0 641 531 461 404 358 316 277 235 184 149 118 100 83.902057500 (w) Roanoke River near Toshes, Va. 1,017 36 0 492 413 363 325 293 264 235 206 171 146 122 109 97.402058000 (p) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 40.6 32.9 28.9 26.3 24.3 22.6 21.3 20.0 18.7 18.0 17.4 17.2 17.002058000 (r) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --02058000 (w) Snow Creek at Route 969 at Sago, Va. 59.6 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --02058400 (p) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 236 197 172 152 135 119 103 86.4 66.7 53.1 40.5 33.5 27.902058400 (r) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 200 160 135 116 100 85.9 72.8 59.0 43.2 32.8 23.8 19.0 15.502058400 (w) Pigg River above Route 40 near Sandy Level, Va. 351 42 0 235 197 171 151 134 118 102 85.9 66.4 52.9 40.3 33.3 27.802058500 (p) Pigg River along Route 605 near Toshes, Va. 382 32 0 250 215 190 171 154 138 122 105 84.3 69.5 55.2 46.9 40.202058500 (r) Pigg River along Route 605 near Toshes, Va. 382 32 0 219 176 149 128 111 95.3 81.0 65.8 48.4 37.0 27.0 21.6 17.702058500 (w) Pigg River along Route 605 near Toshes, Va. 382 32 0 250 214 190 170 153 137 121 105 83.8 69.1 54.8 46.6 40.002059500 (p) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 88.6 74.5 65.3 57.9 51.6 45.8 40.1 34.1 26.9 21.9 17.1 14.4 12.302059500 (r) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 101 79.4 66.0 55.7 47.4 40.0 33.2 26.2 18.5 13.5 9.28 7.14 5.7402059500 (w) Goose Creek above Route 732 near Huddleston, Va. 188 75 0 88.9 74.6 65.3 57.9 51.5 45.7 40.0 33.9 26.7 21.7 17.0 14.3 12.202060500 (p) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 987 873 788 716 649 583 515 440 345 276 209 171 141

02060500 (r) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 1,186 999 879 781 701 629 562 486 394 332 276 241 204

02060500 (w) Roanoke (Staunton) River at Route 29 (Alternate) at 

Altavista, Va. 

1,782 76 0 992 876 790 717 650 584 516 441 346 277 210 172 141

02061000 (p) Big Otter River (Otter River) at Route 221 near Bedford, Va. 114 16 0 50.8 39.4 32.9 28.2 24.4 21.2 18.2 15.2 11.9 9.74 7.77 6.69 5.8302061000 (r) Big Otter River (Otter River) at Route 221 near Bedford, Va. 114 16 0 58.3 45.2 37.1 31.0 26.0 21.7 17.7 13.7 9.34 6.61 4.36 3.27 2.5902061000 (w) Big Otter River (Otter River) at Route 221 near Bedford, Va. 114 16 0 51.0 39.6 33.0 28.3 24.5 21.2 18.2 15.2 11.9 9.70 7.73 6.65 5.80
116 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 30-day averaged, adjusted low flow (ft3/s) 02061500 (p) Big Otter River (Otter River) at Route 682 near Eving- ton, Va. 315 69 0 162 137 118 103 88.1 74.4 60.8 46.6 30.6 20.5 12.3 8.45 5.83 02061500 (r) Big Otter River (Otter River) at Route 682 near Eving- ton, Va. 315 69 0 177 142 120 102 87.9 75.2 63.5 51.3 37.3 28.1 20.2 16.0 13.0 02061500 (w) Big Otter River (Otter River) at Route 682 near Eving- ton, Va. 315 69 0 162 137 118 103 88.1 74.4 60.8 46.7 30.7 20.6 12.4 8.54 5.91 02062500 (p) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,324 1,142 1,018 917 828 745 661 571 460 380 302 258 221 02062500 (r) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,646 1,399 1,240 1,110 1,003 907 819 717 592 509 433 384 329 02062500 (w) Roanoke (Staunton) River above Route 501 at Brookneal, Va. 2,404 82 0 1,332 1,148 1,022 921 832 748 664 573 461 381 304 259 222 02064000 (p) Falling River at Route 643 near Naruna, Va. 165 69 0 78.1 64.7 55.6 48.4 42.2 36.4 30.8 24.9 18.2 13.7 9.69 7.58 5.98 02064000 (r) Falling River at Route 643 near Naruna, Va. 165 69 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02064000 (w) Falling River at Route 643 near Naruna, Va. 165 69 0 -- -- -- -- -- -- -- -- -- -- -- -- --02065200 (p) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,387 1,227 1,106 1,002 905 810 711 602 464 364 270 216 175

02065200 (r) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,856 1,583 1,407 1,262 1,144 1,037 940 826 687 595 511 456 392

02065200 (w) Roanoke (Staunton) River at Route 620 at Clarkton, 

Va. 

2,682 12 0 1,398 1,235 1,113 1,008 910 814 715 605 467 367 272 219 177

02065500 (p) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 49.8 43.6 38.5 34.0 29.7 25.4 21.1 16.5 11.0 7.41 4.47 3.06 2.1002065500 (r) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --02065500 (w) Cub Creek at Route 40 at Phenix, Va. 97.6 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --02066000 (p) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,579 1,383 1,245 1,131 1,028 929 829 719 581 481 382 324 277

02066000 (r) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,280 1,046 903 -- -- -- -- -- -- -- -- -- --

02066000 (w) Roanoke (Staunton) River at Route 746 at Randolph, 

Va. 

2,966 59 0 1,567 1,369 1,231 -- -- -- -- -- -- -- -- -- --

02066500 (p) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 40.8 31.5 25.2 20.3 16.2 12.6 9.42 6.45 3.56 2.04 1.01 0.600 0.37002066500 (r) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 -- -- -- -- -- -- -- -- -- -- -- -- --02066500 (w) Roanoke Creek at Route 612 at Saxe, Va. 135 25 0 -- -- -- -- -- -- -- -- -- -- -- -- --02067000 (p) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,831 1,537 1,344 1,193 1,062 942 824 700 551 448 350 295 251

02067000 (r) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,407 1,153 998 -- -- -- -- -- -- -- -- -- --

02067000 (w) Roanoke (Staunton) River at Route 360 near Clover, 

Va. 

3,227 22 0 1,813 1,521 1,330 -- -- -- -- -- -- -- -- -- --

02069700 (p) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 84.8 72.7 64.8 58.5 53.0 47.9 42.9 37.5 30.9 26.2 21.6 18.9 16.602069700 (r) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 -- -- -- -- -- -- -- -- -- -- -- -- --02069700 (w) South Mayo River at Route 700 near Nettleridge, Va. 85.5 44 0 -- -- -- -- -- -- -- -- -- -- -- -- --02070000 (p) North Mayo River below Route 629 near Spencer, Va. 108 77 0 85.5 74.4 66.7 60.3 54.5 49.0 43.4 37.3 29.8 24.3 19.0 16.0 13.502070000 (r) North Mayo River below Route 629 near Spencer, Va. 108 77 0 -- -- -- -- -- -- -- -- -- -- -- -- --02070000 (w) North Mayo River below Route 629 near Spencer, Va. 108 77 0 -- -- -- -- -- -- -- -- -- -- -- -- --
Table 4. (30-day averaged, adjusted low flow) 117

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

02071530 (p) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 28.6 22.2 18.7 16.2 14.3 12.7 11.2 9.74 8.13 7.09 6.13 5.60 5.18

02071530 (r) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 11.7 8.67 6.86 5.53 4.49 3.59 2.79 2.04 1.27 0.817 0.478 0.329 0.252

02071530 (w) Smith River at Smith River Church (Route 798) near 

Woolwine, Va. 

26.3 11 0 28.2 21.9 18.4 16.0 14.1 12.5 11.0 9.61 8.03 7.01 6.06 5.54 5.13

02072000 (p) Smith River below Philpott Dam near Philpott, Va. 215 59 0 185 160 144 131 119 109 98.3 87.0 73.0 62.9 52.8 46.9 41.902072000 (r) Smith River below Philpott Dam near Philpott, Va. 215 59 0 117 92.3 77.0 65.2 55.6 47.1 39.3 31.2 22.2 16.3 11.4 8.81 7.1002072000 (w) Smith River below Philpott Dam near Philpott, Va. 215 59 0 183 159 142 129 118 108 97.3 86.1 72.3 62.3 52.4 46.5 41.602072500 (p) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 220 194 177 164 152 141 130 119 104 92.6 81.4 74.6 68.902072500 (r) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 143 114 95.4 81.1 69.5 59.2 49.7 39.8 28.5 21.3 15.0 11.8 9.5402072500 (w) Smith River at Route 666 (north) at Bassett, Va. 259 67 0 218 192 176 162 151 140 129 117 103 91.7 80.7 73.9 68.302073000 (p) Smith River below Route 58 at Martinsville, Va. 379 76 0 318 286 263 243 225 207 188 167 140 119 97.7 85.0 74.302073000 (r) Smith River below Route 58 at Martinsville, Va. 379 76 0 217 175 148 127 110 94.4 80.2 65.2 47.9 36.6 26.7 21.4 17.502073000 (w) Smith River below Route 58 at Martinsville, Va. 379 76 0 315 283 260 241 222 205 186 165 138 118 96.9 84.3 73.702073500 (p) Leatherwood Creek at Route 650 near Martinsville (Old 

Liberty), Va. 

68.4 8 0 24.1 17.4 13.8 11.2 9.29 7.68 6.25 4.91 3.50 2.64 1.92 1.55 1.28

02073500 (r) Leatherwood Creek at Route 650 near Martinsville (Old 

Liberty), Va. 

68.4 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02073500 (w) Leatherwood Creek at Route 650 near Martinsville (Old 

Liberty), Va. 

68.4 8 0 -- -- -- -- -- -- -- -- -- -- -- -- --

02074500 (p) Sandy River above Route 863 near Danville, Va. 111 76 0 61.6 52.2 46.0 41.0 36.8 32.8 28.9 24.8 19.8 16.3 12.9 11.0 9.4502074500 (r) Sandy River above Route 863 near Danville, Va. 111 76 0 -- -- -- -- -- -- -- -- -- -- -- -- --02074500 (w) Sandy River above Route 863 near Danville, Va. 111 76 0 -- -- -- -- -- -- -- -- -- -- -- -- --02075000 (p) Dan River at railroad bridge at Danville, Va. 2,060 60 0 1,239 1,080 979 902 836 776 717 655 579 523 469 436 40802075000 (r) Dan River at railroad bridge at Danville, Va. 2,060 60 0 -- -- -- -- -- -- -- -- -- -- -- -- --02075000 (w) Dan River at railroad bridge at Danville, Va. 2,060 60 0 -- -- -- -- -- -- -- -- -- -- -- -- --02075045 (p) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 1,502 1,270 1,106 970 850 737 624 506 366 273 189 145 11302075045 (r) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 -- -- -- -- -- -- -- -- -- -- -- -- --02075045 (w) Dan River at wastewater outfall near Danville, Va. 2,116 11 0 -- -- -- -- -- -- -- -- -- -- -- -- --02075500 (p) Dan River at Route 658 at Paces, Va. 2,587 56 0 1,496 1,299 1,164 1,054 957 865 773 673 549 459 371 319 27702075500 (r) Dan River at Route 658 at Paces, Va. 2,587 56 0 -- -- -- -- -- -- -- -- -- -- -- -- --02075500 (w) Dan River at Route 658 at Paces, Va. 2,587 56 0 -- -- -- -- -- -- -- -- -- -- -- -- --02076500 (p) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 6.19 5.41 4.88 4.46 4.09 3.74 3.39 3.00 2.52 2.17 1.82 1.61 1.4402076500 (r) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 -- -- -- -- -- -- -- -- -- -- -- -- --02076500 (w) Georges Creek at Route 40 near Gretna, Va. 9.18 47 0 -- -- -- -- -- -- -- -- -- -- -- -- --02077000 (p) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 245 200 171 148 128 109 91.7 73.6 52.9 39.3 27.4 21.2 16.602077000 (r) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 -- -- -- -- -- -- -- -- -- -- -- -- --02077000 (w) Banister River at Route 360 (Business) at Halifax, Va. 547 77 0 -- -- -- -- -- -- -- -- -- -- -- -- --02077500 (p) Hyco River at Route 501 near Denniston, Va. 288 59 0 35.1 32.9 29.9 26.4 22.5 18.3 13.8 9.14 4.30 1.93 0.630 0.260 0.10002077500 (r) Hyco River at Route 501 near Denniston, Va. 288 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --02077500 (w) Hyco River at Route 501 near Denniston, Va. 288 59 0 -- -- -- -- -- -- -- -- -- -- -- -- --02078000 (p) Hyco River at Route 738 near Omega, Va. 412 15 0 76.2 57.9 46.1 37.2 29.9 23.6 18.0 12.7 7.44 4.56 2.49 1.61 1.0502078000 (r) Hyco River at Route 738 near Omega, Va. 412 15 0 -- -- -- -- -- -- -- -- -- -- -- -- --02078000 (w) Hyco River at Route 738 near Omega, Va. 412 15 0 -- -- -- -- -- -- -- -- -- -- -- -- --02079000 (p) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 4,281 3,649 3,250 2,942 2,680 2,440 2,206 1,960 1,661 1,448 1,239 1,116 1,01402079000 (r) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 -- -- -- -- -- -- -- -- -- -- -- -- --02079000 (w) Roanoke River at Route 58 at Clarksville, Va. 7,393 16 0 -- -- -- -- -- -- -- -- -- -- -- -- --
118 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 30-day averaged, adjusted low flow (ft3/s) 02079640 (p) Allen Creek at Route 58 near Boydton, Va. 53.5 39 1 8.68 6.37 4.73 3.46 2.44 1.63 0.980 0.480 0.130 0.020 0.000 0.000 0.000 02079640 (r) Allen Creek at Route 58 near Boydton, Va. 53.5 39 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 02079640 (w) Allen Creek at Route 58 near Boydton, Va. 53.5 39 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 03164000 (p) New River at Route 94 near Galax, Va. 1,141 76 0 1,085 940 847 775 713 657 601 542 469 416 364 333 307 03164000 (r) New River at Route 94 near Galax, Va. 1,141 76 0 727 605 526 463 411 364 321 272 215 176 141 120 101 03164000 (w) New River at Route 94 near Galax, Va. 1,141 76 0 1,077 932 840 769 708 651 596 537 465 413 361 330 305 03164500 (p) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 03164500 (r) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 03164500 (w) New River at railroad bridge near Grayson, Va. 1,174 3 0 -- -- -- -- -- -- -- -- -- -- -- -- -- 03165000 (p) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 45.2 39.6 36.0 33.2 30.7 28.3 26.0 23.5 20.4 18.2 15.9 14.5 13.3 03165000 (r) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 18.2 13.7 10.9 8.89 7.28 5.89 4.65 3.45 2.20 1.45 0.879 0.620 0.479 03165000 (w) Chestnut Creek above Route 89 at Galax, Va. 39.4 62 0 44.6 39.1 35.5 32.7 30.2 27.9 25.7 23.2 20.2 17.9 15.7 14.3 13.2 03165500 (p) New River at Ivanhoe, Va. 1,350 59 0 1,256 1,079 967 881 808 742 676 608 525 465 406 371 342 03165500 (r) New River at Ivanhoe, Va. 1,350 59 0 875 731 638 564 503 447 396 339 270 224 181 156 132

03165500 (w) New River at Ivanhoe, Va. 1,350 59 0 1,247 1,071 960 875 802 736 672 603 521 462 403 369 34003166800 (p) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.200 0.160 0.140 0.120 0.100 0.090 0.070 0.060 0.040 0.030 0.020 0.020 0.01003166800 (r) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 1.90 1.45 1.19 1.02 0.875 0.756 0.646 0.540 0.422 0.345 0.276 0.237 0.20803166800 (w) Glade Creek at Route 629 at Grahams Forge, Va. 7.15 16 0 0.242 0.191 0.165 0.141 0.118 0.105 0.083 0.071 0.048 0.036 0.025 0.024 0.01403167000 (p) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 104 94.2 87.7 82.6 78.1 74.0 69.9 65.5 59.9 55.8 51.6 49.1 46.903167000 (r) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 81.0 66.2 57.4 51.3 46.0 41.3 37.0 32.7 27.7 24.2 20.8 18.9 17.303167000 (w) Reed Creek at Route 619 at Grahams Forge, Va. 258 85 0 104 93.6 87.1 81.9 77.5 73.4 69.3 64.8 59.3 55.3 51.1 48.6 46.403167500 (p) Big Reed Island Creek below Route 693 near Allisonia, 

Va. 

267 63 0 245 219 202 189 177 166 155 143 129 118 107 99.9 94.1

03167500 (r) Big Reed Island Creek below Route 693 near Allisonia, 

Va. 

267 63 0 148 118 98.8 84.1 72.1 61.4 51.6 41.4 29.7 22.2 15.7 12.4 10.0

03167500 (w) Big Reed Island Creek below Route 693 near Allisonia, 

Va. 

267 63 0 243 217 200 187 175 164 154 142 127 117 106 99.0 93.3

03168000 (p) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,786 1,557 1,411 1,298 1,202 1,113 1,025 932 818 735 652 603 56103168000 (r) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,503 1,274 1,127 1,006 908 819 737 643 529 452 382 337 28803168000 (w) New River along Route 653 at Allisonia, Va. 2,212 76 0 1,780 1,551 1,405 1,293 1,196 1,107 1,020 928 814 731 649 600 55803168500 (p) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 6.65 4.10 3.07 2.48 2.10 1.81 1.59 1.41 1.25 1.17 1.12 1.11 1.1003168500 (r) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 17.9 14.2 12.0 10.6 9.32 8.24 7.24 6.25 5.13 4.36 3.64 3.23 2.9103168500 (w) Peak Creek below Route 11 at Pulaski, Va. 60.8 10 0 6.95 4.36 3.30 2.68 2.28 1.97 1.73 1.52 1.34 1.24 1.17 1.15 1.1403170000 (p) Little River at Route 693 at Graysontown (Graysonton), 

Va. 

309 78 0 220 187 166 151 137 125 113 101 86.2 75.7 65.4 59.4 54.4

03170000 (r) Little River at Route 693 at Graysontown (Graysonton), 

Va. 

309 78 0 174 139 117 99.8 85.9 73.5 62.0 50.0 36.3 27.4 19.6 15.5 12.6

03170000 (w) Little River at Route 693 at Graysontown (Graysonton), 

Va. 

309 78 0 219 186 165 149 136 124 112 100 85.5 75.1 64.9 58.9 54.0

03171000 (p) New River below Route 11 at Radford, Va. 2,767 75 0 2,139 1,864 1,694 1,564 1,455 1,355 1,259 1,157 1,035 946 860 808 76503171000 (r) New River below Route 11 at Radford, Va. 2,767 75 0 1,921 1,639 1,458 1,309 1,187 1,078 977 860 717 622 535 479 41103171000 (w) New River below Route 11 at Radford, Va. 2,767 75 0 2,134 1,859 1,689 1,559 1,450 1,350 1,254 1,153 1,030 942 856 805 76103171500 (p) New River at Route 730 at Eggleston, Va. 2,961 61 0 2,168 1,917 1,753 1,623 1,510 1,404 1,298 1,184 1,041 935 827 762 70703171500 (r) New River at Route 730 at Eggleston, Va. 2,961 61 0 2,069 1,769 1,576 1,417 1,288 1,171 1,064 940 786 685 593 533 45803171500 (w) New River at Route 730 at Eggleston, Va. 2,961 61 0 2,165 1,914 1,749 1,619 1,506 1,400 1,295 1,180 1,037 931 825 760 70403173000 (p) Walker Creek below Route 100 at Bane, Va. 299 68 0 79.3 66.3 59.1 54.0 50.0 46.6 43.5 40.5 37.1 34.9 33.0 32.0 31.203173000 (r) Walker Creek below Route 100 at Bane, Va. 299 68 0 94.5 77.5 67.3 60.2 54.2 48.7 43.8 38.7 32.9 28.8 24.8 22.6 20.803173000 (w) Walker Creek below Route 100 at Bane, Va. 299 68 0 79.6 66.6 59.3 54.2 50.1 46.7 43.5 40.4 37.0 34.8 32.9 31.8 31.0
Table 4. (30-day averaged, adjusted low flow) 119

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

03175500 (p) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 69.8 57.2 50.1 44.9 40.8 37.2 33.8 30.5 26.7 24.1 21.7 20.3 19.2

03175500 (r) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 69.6 56.7 49.0 43.7 39.2 35.1 31.4 27.6 23.4 20.4 17.4 15.8 14.503175500 (w) Wolf Creek at Route 724 near Narrows, Va. 223 75 0 69.8 57.2 50.0 44.9 40.7 37.1 33.8 30.4 26.6 24.0 21.6 20.2 19.103176500 (p) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 2,584 2,237 2,022 1,858 1,720 1,595 1,473 1,345 1,191 1,081 972 908 85403176500 (r) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 2,706 2,332 2,090 1,890 1,727 1,581 1,448 1,291 1,098 971 858 781 67603176500 (w) New River at Route 460 at Glen Lyn, Va. 3,783 79 0 2,587 2,239 2,023 1,859 1,720 1,594 1,473 1,344 1,190 1,079 971 906 85203177700 (p) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 20.2 16.3 14.2 12.7 11.5 10.6 9.66 8.79 7.82 7.20 6.64 6.33 6.09

03177700 (r) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 11.4 9.00 7.60 6.63 5.82 5.12 4.48 3.84 3.12 2.63 2.18 1.92 1.72

03177700 (w) Bluestone River above wastewater outfall at Bluefield, 

Va. 

39.7 14 0 20.0 16.2 14.1 12.6 11.4 10.4 9.55 8.69 7.73 7.12 6.56 6.25 6.02

03177710 (p) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 20.8 18.1 16.5 15.3 14.4 13.5 12.8 12.0 11.0 10.4 9.82 9.49 9.2203177710 (r) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 12.8 10.1 8.55 7.47 6.57 5.79 5.07 4.35 3.54 3.00 2.49 2.19 1.9703177710 (w) Bluestone River at Route 717 at Falls Mills, Va. 44.3 17 0 20.6 17.9 16.3 15.2 14.2 13.4 12.6 11.8 10.9 10.3 9.69 9.37 9.1103207500 (p) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 40.8 29.5 22.7 17.7 13.8 10.5 7.71 5.20 2.85 1.65 0.840 0.520 0.32003207500 (r) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 69.2 52.2 41.8 34.4 28.1 22.9 18.2 13.7 9.06 6.26 4.03 2.95 2.1803207500 (w) Levisa Fork along Route 460 near Grundy, Va. 239 34 0 60.4 44.9 35.3 28.3 22.5 17.7 13.3 9.33 5.26 3.26 1.75 1.12 0.81203207800 (p) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 82.4 66.0 55.8 48.1 41.6 35.8 30.4 24.9 18.6 14.4 10.7 8.73 7.2003207800 (r) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 85.7 64.4 51.3 42.1 34.3 27.9 22.1 16.6 11.0 7.56 4.87 3.56 2.6303207800 (w) Levisa Fork below Route 645 at Big Rock, Va. 297 38 0 84.4 65.0 53.2 44.7 37.7 31.9 26.6 21.6 16.2 12.5 9.43 7.75 6.2703208500 (p) Russell Fork below Route 63 at Haysi, Va. 286 79 0 54.8 39.5 30.3 23.7 18.5 14.2 10.5 7.19 4.04 2.40 1.26 0.800 0.51003208500 (r) Russell Fork below Route 63 at Haysi, Va. 286 79 0 82.6 62.1 49.5 40.6 33.2 27.0 21.4 16.1 10.6 7.31 4.72 3.45 2.5503208500 (w) Russell Fork below Route 63 at Haysi, Va. 286 79 0 73.8 54.7 42.9 34.4 27.4 21.5 16.3 11.4 6.56 4.09 2.23 1.45 1.0403208700 (p) North Fork Pound River below dam at Pound, Va. 18.5 25 0 5.33 4.51 3.85 3.25 2.71 2.19 1.68 1.18 0.650 0.370 0.170 0.100 0.06003208700 (r) North Fork Pound River below dam at Pound, Va. 18.5 25 0 5.55 4.46 3.73 3.17 2.69 2.26 1.85 1.44 0.971 0.683 0.434 0.319 0.24003208700 (w) North Fork Pound River below dam at Pound, Va. 18.5 25 0 5.48 4.48 3.78 3.20 2.70 2.23 1.76 1.30 0.764 0.469 0.238 0.149 0.10303208800 (p) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 10.7 9.20 8.13 7.26 6.48 5.75 5.01 4.23 3.27 2.60 1.96 1.61 1.3303208800 (r) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 10.9 8.61 7.13 6.01 5.04 4.21 3.41 2.63 1.77 1.24 0.789 0.579 0.43303208800 (w) Pound River above Indian Creek, at Pound, Va. 36.7 12 0 10.8 8.86 7.56 6.58 5.74 5.01 4.31 3.61 2.82 2.24 1.71 1.42 1.1503208850 (p) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 18.7 15.5 13.5 12.0 10.7 9.46 8.30 7.08 5.64 4.64 3.69 3.15 2.7203208850 (r) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 18.1 14.1 11.6 9.67 8.06 6.68 5.39 4.13 2.76 1.92 1.23 0.903 0.67303208850 (w) Pound River below Bold Camp Creek, at Pound, Va. 61.2 12 0 18.3 14.7 12.4 10.7 9.33 8.13 7.02 5.94 4.78 3.92 3.17 2.74 2.3203208900 (p) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 25.7 20.7 17.6 15.1 13.1 11.3 9.49 7.71 5.68 4.34 3.16 2.52 2.0403208900 (r) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 23.6 18.3 14.9 12.5 10.4 8.56 6.88 5.25 3.50 2.44 1.56 1.14 0.85203208900 (w) Pound River at Route 624 near Georges Fork, Va. 80.4 18 0 24.4 19.3 16.0 13.6 11.6 9.92 8.30 6.72 5.00 3.81 2.80 2.26 1.8003208950 (p) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 20.3 15.6 13.0 11.1 9.63 8.38 7.24 6.12 4.87 4.06 3.33 2.92 2.6003208950 (r) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 19.6 15.3 12.5 10.4 8.70 7.21 5.80 4.44 2.97 2.07 1.32 0.971 0.72303208950 (w) Cranes Nest River below railroad bridge near Clintwood, Va. 66.5 43 0 19.9 15.4 12.7 10.7 9.14 7.81 6.60 5.46 4.28 3.52 2.89 2.55 2.2203209000 (p) Pound River near Haysi, Va. 221 79 0 88.8 62.1 45.9 34.3 25.4 18.2 12.4 7.54 3.46 1.68 0.680 0.350 0.18003209000 (r) Pound River near Haysi, Va. 221 79 0 64.1 48.5 38.8 32.0 26.2 21.4 17.0 12.8 8.47 5.85 3.77 2.76 2.0403209000 (w) Pound River near Haysi, Va. 221 79 0 70.4 52.1 40.8 32.7 25.9 20.2 15.1 10.4 5.72 3.39 1.74 1.07 0.77103209200 (p) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 176 142 119 99.3 82.6 67.4 53.1 39.0 24.1 15.3 8.67 5.72 3.8003209200 (r) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 151 112 88.0 71.7 58.0 46.8 36.9 27.5 18.0 12.4 8.02 5.86 4.3103209200 (w) Russell Fork at Route 611 at Bartlick, Va. 526 19 0 160 123 99.8 83.0 68.7 56.6 45.2 34.1 22.0 14.4 8.51 5.75 3.91
120 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2) Number of complete climatic years Number of years with zero flow Return period (years) 1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200 Non-exceedance probability 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005 30-day averaged, adjusted low flow (ft3/s) 03471500 (p) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 43.2 36.7 33.0 30.4 28.3 26.4 24.8 23.1 21.2 20.0 18.8 18.2 17.7 03471500 (r) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 22.7 18.1 15.5 13.6 12.0 10.7 9.40 8.14 6.71 5.74 4.81 4.28 3.87 03471500 (w) South Fork Holston River above Route 645 at River- side, near Chilhowie, Va. 76.6 74 0 42.7 36.3 32.6 30.0 27.9 26.1 24.4 22.8 20.9 19.7 18.6 18.0 17.5 03472500 (p) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 20.2 17.0 15.1 13.5 12.2 11.0 9.86 8.64 7.17 6.12 5.11 4.53 4.04 03472500 (r) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 16.3 12.9 10.9 9.58 8.44 7.46 6.55 5.64 4.62 3.93 3.27 2.90 2.61 03472500 (w) Beaverdam Creek above railroad bridge at Damascus, Va. 55.6 11 0 20.1 16.9 15.0 13.4 12.1 10.9 9.79 8.58 7.12 6.08 5.08 4.50 4.02 03473000 (p) South Fork Holston River above Route 58 near Damas- cus, Va. 303 75 0 174 148 133 122 113 105 97.5 90.1 81.7 75.9 70.6 67.6 65.1

03473000 (r) South Fork Holston River above Route 58 near Damascus, Va. 303 75 0 95.8 78.6 68.2 61.1 55.0 49.5 44.4 39.2 33.4 29.3 25.2 23.0 21.103473000 (w) South Fork Holston River above Route 58 near Damascus, Va. 303 75 0 172 146 131 120 111 104 96.4 89.1 80.8 75.1 69.8 66.8 64.403473500 (p) Middle Fork Holston River at Route 679 at Groseclose, 

Va. 

7.4 11 0 4.54 4.07 3.78 3.56 3.38 3.21 3.05 2.88 2.67 2.53 2.39 2.31 2.24

03473500 (r) Middle Fork Holston River at Route 679 at Groseclose, 

Va. 

7.4 11 0 1.97 1.50 1.24 1.06 0.909 0.785 0.672 0.562 0.439 0.360 0.288 0.247 0.217

03473500 (w) Middle Fork Holston River at Route 679 at Groseclose, 

Va. 

7.4 11 0 4.49 4.02 3.73 3.51 3.33 3.16 3.00 2.84 2.63 2.49 2.35 2.28 2.21

03474000 (p) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 57.3 50.0 45.6 42.4 39.7 37.4 35.1 32.8 30.1 28.3 26.5 25.5 24.7

03474000 (r) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 40.2 32.4 27.8 24.6 21.9 19.6 17.4 15.2 12.7 10.9 9.27 8.32 7.58

03474000 (w) Middle Fork Holston River at Route 11 at Seven Mile 

Ford, Va. 

132 50 0 57.0 49.6 45.3 42.0 39.4 37.0 34.8 32.5 29.8 28.0 26.2 25.2 24.4

03474500 (p) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 80.3 64.9 56.3 50.1 45.2 41.0 37.2 33.4 29.1 26.2 23.5 22.0 20.9

03474500 (r) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 46.9 37.9 32.6 29.0 25.8 23.1 20.5 18.0 15.0 13.0 11.1 9.97 9.10

03474500 (w) Middle Fork Holston River at Route 762 at Chilhowie, 

Va. 

153 10 0 79.5 64.3 55.7 49.7 44.8 40.7 36.8 33.1 28.8 25.9 23.3 21.8 20.7

03475000 (p) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 101 87.2 79.0 72.9 67.9 63.5 59.3 55.0 50.0 46.6 43.3 41.5 39.903475000 (r) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 64.0 52.1 45.0 40.1 35.9 32.2 28.7 25.2 21.3 18.5 15.9 14.3 13.103475000 (w) Middle Fork Holston River at Route 803 near Meadowview, Va. 206 51 0 100 86.5 78.2 72.2 67.2 62.8 58.7 54.4 49.5 46.1 42.9 41.0 39.503477500 (p) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 7.28 6.18 5.54 5.09 4.72 4.40 4.10 3.80 3.46 3.23 3.02 2.90 2.80

03477500 (r) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 3.76 2.90 2.41 2.07 1.80 1.56 1.35 1.14 0.901 0.746 0.605 0.524 0.463

03477500 (w) Beaver Creek below Beaver Creek Lake near Wallace, 

Va. 

13.7 10 0 7.20 6.11 5.47 5.03 4.66 4.34 4.04 3.75 3.41 3.19 2.98 2.86 2.76
Table 4. (30-day averaged, adjusted low flow) 121

Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued[ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined]

Station 

number Station description

Drainage 

area 

(mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

03478400 (p) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 17.5 15.4 14.1 13.1 12.3 11.6 10.9 10.1 9.24 8.62 8.02 7.66 7.37

03478400 (r) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 7.61 5.94 4.99 4.33 3.78 3.32 2.89 2.46 1.98 1.66 1.36 1.19 1.0603478400 (w) Beaver Creek at Route 1405 at (near) Bristol, Va. 26.9 49 0 17.3 15.2 13.9 12.9 12.1 11.4 10.7 9.97 9.11 8.50 7.91 7.55 7.2703488000 (p) North Fork Holston River along Route 91 near Saltville, 

Va. 

221 86 0 69.8 57.3 50.1 45.0 41.0 37.4 34.2 30.9 27.2 24.7 22.4 21.1 20.0

03488000 (r) North Fork Holston River along Route 91 near Saltville, 

Va. 

221 86 0 68.9 56.1 48.5 43.3 38.8 34.8 31.1 27.4 23.1 20.1 17.3 15.6 14.3

03488000 (w) North Fork Holston River along Route 91 near Saltville, 

Va. 

221 86 0 69.7 57.2 50.1 45.0 40.9 37.4 34.1 30.8 27.1 24.6 22.3 21.0 19.9

03489500 (p) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 182 148 128 113 100 89.2 78.7 67.9 55.3 46.7 38.6 34.0 30.2

03489500 (r) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 159 132 115 104 94.1 85.2 77.0 68.5 59.0 52.1 45.4 41.6 38.5

03489500 (w) North Fork Holston River at Route 615 at Mendota, 

Va. 

493 10 0 182 148 128 113 100 89.1 78.6 67.9 55.4 46.8 38.7 34.1 30.4

03489900 (p) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 23.3 20.2 18.1 16.6 15.2 13.9 12.7 11.3 9.64 8.43 7.23 6.52 5.9203489900 (r) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 23.7 18.9 16.1 14.2 12.5 11.1 9.82 8.50 7.02 6.01 5.04 4.49 4.0603489900 (w) Big Moccasin Creek at Route 71 near Gate City, Va. 79.6 8 0 23.3 20.1 18.1 16.5 15.1 13.9 12.6 11.2 9.59 8.39 7.19 6.49 5.8903490000 (p) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 203 167 146 131 119 108 97.7 87.5 75.7 67.6 60.0 55.6 52.0

03490000 (r) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 220 183 161 146 132 120 109 97.4 84.5 75.1 65.8 60.6 56.4

03490000 (w) North Fork Holston River at Route 23 near Gate City, 

Va. 

671 49 0 204 168 147 131 119 108 98.0 87.7 75.8 67.7 60.1 55.7 52.1

03521500 (p) Clinch River along Route 707 at Richlands, Va. 137 43 0 47.3 38.9 34.2 30.8 28.1 25.8 23.6 21.5 19.1 17.5 16.1 15.3 14.603521500 (r) Clinch River along Route 707 at Richlands, Va. 137 43 0 41.8 33.7 29.0 25.7 22.9 20.4 18.1 15.8 13.2 11.4 9.70 8.71 7.9403521500 (w) Clinch River along Route 707 at Richlands, Va. 137 43 0 47.2 38.8 34.0 30.7 28.0 25.6 23.5 21.4 19.0 17.4 16.0 15.1 14.503524000 (p) Clinch River above Route 661 at Cleveland, Va. 533 86 0 181 145 125 111 100 90.9 82.5 74.2 64.9 58.9 53.3 50.3 47.803524000 (r) Clinch River above Route 661 at Cleveland, Va. 533 86 0 173 143 126 113 103 92.9 84.0 74.9 64.6 57.2 49.9 45.7 42.403524000 (w) Clinch River above Route 661 at Cleveland, Va. 533 86 0 181 145 125 111 100 91.0 82.5 74.2 64.9 58.8 53.3 50.2 47.703524500 (p) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 27.5 17.7 13.0 10.0 7.94 6.30 4.95 3.76 2.60 1.94 1.41 1.14 0.95003524500 (r) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 25.6 19.8 16.1 13.4 11.2 9.21 7.39 5.64 3.76 2.62 1.68 1.23 0.91303524500 (w) Guest River at Route 72 at Coeburn, Va. 87.2 12 0 26.2 19.1 15.0 12.1 9.81 7.89 6.19 4.62 3.02 2.16 1.48 1.16 0.94103525000 (p) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03525000 (r) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03525000 (w) Stony Creek above Route 66 at Fort Blackmore, Va. 41.5 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --03526000 (p) Copper Creek at Route 619 near Gate City, Va. 106 26 0 42.0 35.8 32.3 29.8 27.9 26.2 24.7 23.2 21.6 20.5 19.6 19.1 18.703526000 (r) Copper Creek at Route 619 near Gate City, Va. 106 26 0 31.9 25.6 21.9 19.4 17.2 15.3 13.6 11.8 9.81 8.43 7.12 6.37 5.7803526000 (w) Copper Creek at Route 619 near Gate City, Va. 106 26 0 41.7 35.5 32.1 29.6 27.6 26.0 24.5 23.0 21.3 20.3 19.4 18.9 18.503527000 (p) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 376 298 254 223 198 177 158 139 117 103 90.0 82.6 76.703527000 (r) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 377 317 281 256 234 213 195 176 154 138 122 114 10603527000 (w) Clinch River below Route 58 at Speers Ferry, Va. 1,123 62 0 376 299 255 224 199 178 159 140 118 104 90.6 83.2 77.203527500 (p) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03527500 (r) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03527500 (w) North Fork Clinch River at Route 58 at Duffield, Va. 23.1 6 0 -- -- -- -- -- -- -- -- -- -- -- -- --03529500 (p) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 46.2 35.8 29.7 25.3 21.8 18.7 15.9 13.1 9.95 7.92 6.11 5.13 4.3603529500 (r) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 32.8 25.2 20.4 17.0 14.0 11.5 9.25 7.04 4.68 3.25 2.08 1.53 1.1303529500 (w) Powell River at Route 23 at Big Stone Gap, Va. 112 23 0 37.9 29.4 24.3 20.7 17.7 15.2 12.9 10.6 8.30 6.62 5.21 4.44 3.70
122 Low-Flow Characteristics of Virginia Streams Table 4. Low-flow characteristics of streamgaging stations in Virginia.—Continued [ft, foot; ft3/s, cubic foot per second; mi2, square mile; p, Log-Pearson Type III; r, regional regression; w, weighted value; --, not determined] Station number Station description Drainage area (mi2

)

Number of 

complete 

climatic 

years

Number of 

years with 

zero flow

Return period (years)

1.1 1.2 1.4 1.7 2 2.5 3.3 5 10 20 50 100 200

Non-exceedance probability

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.02 0.01 0.005

 30-day averaged, adjusted low flow (ft3/s)

03530000 (p) South Fork Powell River at Route 23 at Big Stone Gap, 

Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530000 (r) South Fork Powell River at Route 23 at Big Stone Gap, 

Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530000 (w) South Fork Powell River at Route 23 at Big Stone Gap, 

Va. 

39.7 2 0 -- -- -- -- -- -- -- -- -- -- -- -- --

03530500 (p) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 17.7 13.4 10.8 8.83 7.28 5.95 4.75 3.59 2.38 1.66 1.08 0.790 0.590

03530500 (r) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 21.0 16.3 13.3 11.1 9.26 7.66 6.17 4.72 3.15 2.19 1.40 1.03 0.767

03530500 (w) North Fork Powell River at Route 621 at Pennington 

Gap, Va. 

71.2 11 0 19.8 15.2 12.3 10.2 8.39 6.84 5.43 4.07 2.64 1.82 1.16 0.840 0.630

03531000 (p) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 112 76.1 58.7 47.7 39.7 33.4 28.1 23.3 18.3 15.4 12.9 11.6 10.603531000 (r) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 83.7 62.9 50.2 41.2 33.6 27.3 21.6 16.3 10.7 7.40 4.77 3.49 2.5803531000 (w) Powell River at Route 421 near Pennington Gap, Va. 290 10 0 94.4 68.0 53.6 43.9 36.4 30.3 25.1 20.3 15.8 13.1 11.0 9.95 8.8703531500 (p) Powell River at Route 70 near Jonesville, Va. 319 75 0 112 88.6 75.1 65.3 57.5 50.7 44.5 38.3 31.2 26.5 22.2 19.8 17.803531500 (r) Powell River at Route 70 near Jonesville, Va. 319 75 0 92.0 69.0 54.9 45.0 36.6 29.8 23.6 17.7 11.7 8.04 5.19 3.79 2.8003531500 (w) Powell River at Route 70 near Jonesville, Va. 319 75 0 100 77.0 63.5 54.2 46.7 40.6 35.2 30.2 25.3 21.6 18.5 16.8 14.9
Manuscript approved on August 22, 2011.

Prepared by:

USGS Science Publishing Network

Raleigh Publishing Service Center

3916 Sunset Ridge Road

Raleigh, NC 27607

For additional information regarding this publication, contact:

Samuel H. Austin, Hydrologist

USGS Virginia Water Science Center

1730 East Parham Road

Richmond, Virginia 23228

phone: 804-261-2600

e-mail: saustin@usgs.gov

Or visit the Virginia Water Science Center Web site at:

http://va.water.usgs.gov

A PDF version of this publication is available online at 

http://pubs.usgs.gov/sir/2011/5143/
Austin and others—Low-Flow Characteristics of Virginia Streams—Scientific Investigations Report 2011–5143

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