U.S. Department of the Interior

U.S. Geological Survey

Scientific Investigations Report 2015–5001

Prepared in cooperation with the North Carolina Department of Environment and Natural 

Resources, Division of Water Resources

Low-Flow Characteristics and Flow-Duration Statistics for 

Selected USGS Continuous-Record Streamgaging Stations in 

North Carolina Through 2012
Cover: U.S. Geological Survey streamflow gage 03450000, Beetree Creek near Swannanoa in 

Buncombe County in western North Carolina, with records of continuous discharge dating back to 

February 1926. Photograph by Curtis Weaver, U.S. Geological Survey.
Low-Flow Characteristics and FlowDuration Statistics for Selected USGS 

Continuous-Record Streamgaging Stations 

in North Carolina Through 2012

By J. Curtis Weaver

Prepared in cooperation with the North Carolina Department of Environment and 

Natural Resources, Division of Water Resources

Scientific Investigations Report 2015–5001

U.S. Department of the Interior

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

SALLY JEWELL, Secretary

U.S. Geological Survey

Suzette M. Kimball, Acting Director

U.S. Geological Survey, Reston, Virginia: 2015

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as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Suggested citation:

Weaver, J.C., 2015, Low-flow characteristics and flow-duration statistics for selected USGS 

continuous-record streamgaging stations in North Carolina through 2012: U.S. Geological Survey 

Scientific Investigations Report 2015–5001, 89 p., http://dx.doi.org/10.3133/sir20155001.

ISSN 2328-0328 (online)
iii

Acknowledgments

Support for this study was provided by the North Carolina Division of Water Resources under 

the leadership of Mr. Tom Reeder, Director. Mr. Reeder’s foresight and leadership in areas of 

water management, as well as his assistance and support of this study, has improved the 

understanding of the streamflow statistics for streams across North Carolina.

v

Contents

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

Introduction.....................................................................................................................................................2

Purpose and Scope ..............................................................................................................................6

Previous Low-Flow Studies...............................................................................................................10

Low-Flow Characteristics...........................................................................................................................11

Computational Procedures for Low-Flow Characteristics ..........................................................12

Quality Assurance Procedures ........................................................................................................14

Results of Quality Assurance Analyses ..........................................................................................15

Updated Low-Flow Characteristics Through 2012 ........................................................................18

Comparison of 7Q10 Discharges for 1998 and 2011 Climatic Years ...........................................30

Access to Updated Low-Flow Characteristics Through StreamStats Application .................34

Flow-Duration Statistics .............................................................................................................................35

Computational Procedures for Flow-Duration Statistics .............................................................35

Compilation of Streamflow Statistics ..............................................................................................38

Access to Streamflow Statistics Through the StreamStats Application ..................................38

Summary and Conclusions.........................................................................................................................41

References Cited..........................................................................................................................................42

Glossary.........................................................................................................................................................45

Figures

1–5. Maps showing: 

1. Locations of selected rivers, lakes, metropolitan areas, counties, and 

physiographic provinces in North Carolina.....................................................................3

2. Seventeen major river basins used in North Carolina by State agencies to 

plan and manage water resources...................................................................................4

3. Selected river basins in North Carolina where basinwide low-flow studies 

were completed by the U.S. Geological Survey between 1996 and 2003...................5

4. Active continuous-record streamgages in western and eastern North Carolina 

as of the 2012 water year and physiographic provinces ..............................................6

5. Discontinued continuous-record streamgages in western and eastern 

North Carolina as of the 2012 water year and physiographic provinces ...................8

6–8. Graphs showing: 

6. Low-flow frequency curve of annual minimum 7-day average streamflow using 

log-Pearson Type III frequency distribution at Elk Creek at Elkville 

in Wilkes County, North Carolina ....................................................................................13

7. Annual minimum 7-day average streamflow, 7Q10 discharge, and 

Kendall tau p-value for the 1966–2011 climatic years at Elk Creek at Elkville in 

Wilkes County, North Carolina.........................................................................................14

8. Annual minimum 7-day average streamflows at Cape Fear River at 

Lillington, Cape Fear River at William O. Huske Lock 3 near Tarheel, and 

Cape Fear River at Lock 1 near Kelly..............................................................................17
vi

9. Map showing differences between 7Q10 discharges determined for periods of 

record available through the 1998 and 2011 climatic years at selected 

U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina with 30 or more climatic years as of the 1998 climatic year ....................33

10. Screenshots of U.S. Geological Survey StreamStats application showing 

location of Gaging Station Information tool and sample pop-up window with 

streamgage attributes where updated streamflow statistics can be accessed.............34

11. Graph showing flow-duration curve of daily mean discharge for 1966–2012 

water years at Elk Creek at Elkville in Wilkes County, North Carolina...............................36

12. Screenshot showing duration hydrograph of daily mean discharge observed 

during the 2013–14 calendar years at Elk Creek at Elkville in Wilkes County, 

North Carolina, plotted against a background of non-exceedance percentiles 

based on historical streamflow records.................................................................................37

13. Excerpt of sample table with minimum, mean, maximum, and flow-duration 

statistics of daily mean discharges for each calendar day and selected 

categorical periods at Elk Creek at Elkville in Wilkes County, North Carolina.................39

14. Sample table with minimum, mean, maximum, and flow-duration statistics of 

daily mean discharges for each complete water year of record at Elk Creek at 

Elkville in Wilkes County, North Carolina................................................................................40

Tables

1. Summary of active and discontinued U.S. Geological Survey continuous-record 

streamgaging stations in North Carolina with streamflow data available through 

the 2012 water year that were considered for computation of low-flow and 

flow-duration statistics..............................................................................................................48

2. Selected streamflow statistics compiled for U.S. Geological Survey 

continuous-record streamgaging stations in North Carolina. ............................................11

3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey 

continuous-record streamgaging stations in North Carolina. ............................................20

4. Differences between 7Q10 discharges determined for periods of record available 

through the 1998 and 2011 climatic years at U.S. Geological Survey 

continuous-record streamgaging stations in North Carolina with 30 or more 

climatic years as of the 1998 climatic year.............................................................................31

5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges 

for indicated periods of record at selected U.S. Geological Survey 

continuous-record streamgaging stations in North Carolina. ............................................71
vii

Conversion Factors

Inch/Pound to SI

Multiply By To obtain

Length

mile (mi) 1.609 kilometer (km)

Area

square mile (mi2

) 259.0 hectare (ha)

square mile (mi2

) 2.590 square kilometer (km2) 

Flow rate

cubic foot per second (ft3

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

cubic foot per second (ft3

/s) 0.6463 million gallons per day (Mgal/d)

Datum

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

Abbreviations

30Q2 30-day, 2-year low-flow discharge

7Q10 climatic year 7-day, 10-year low-flow discharge

7Q2 7-day, 2-year low-flow discharge

ASCII American Standard Code for Information Interchange

DCP Drought Contingency Plan

DENR Department of Environment and Natural Resources

EF-SAB Ecological Flows Science Advisory Board

HA hydrologic area

NCDWQ North Carolina Division of Water Quality

NCDWR North Carolina Division of Water Resources

QAQC quality assurance and quality control

USGS U.S. Geological Survey

W7Q10 winter 7-day, 10-year low-flow discharge

Low-Flow Characteristics and Flow-Duration Statistics for 

Selected USGS Continuous-Record Streamgaging Stations 

in North Carolina Through 2012

By J. Curtis Weaver

Abstract 

In 2013, the U.S. Geological Survey, in cooperation with 

the North Carolina Division of Water Resources, compiled 

updated low-flow characteristics and flow-duration statistics 

for selected continuous-record streamgages in North Carolina. 

The compilation of updated streamflow statistics provides 

regulators and planners with relevant hydrologic information 

reflective of the recent droughts, which can be used to better 

manage the quantity and quality of streams in North Carolina.

Streamflow records available through the 2012 water 

year1 were used to determine the annual (based on climatic 

year2) and winter 7-day, 10-year (7Q10, W7Q10) low-flow 

discharges, the 30-day, 2-year (30Q2) low-flow discharge, and 

the 7-day, 2-year (7Q2) low-flow discharge. Consequently, 

streamflow records available through March 31, 2012 

(or the 2011 climatic year) were used to determine the updated 

low-flow characteristics. Low-flow characteristics were 

published for 177 unregulated sites, 56 regulated sites, and 

33 sites known or considered to be affected by varying degrees 

of minor regulation and (or) diversions upstream from the 

streamgages (266 sites total).

The updated 7Q10 discharges were compared for 

63 streamgages across North Carolina where (1) long-term 

streamflow record consisted of 30 or more climatic years of 

data available as of the 1998 climatic year, and (2) streamflows were not known to be regulated. The 7Q10 discharges 

did not change for 3 sites, whereas increases and decreases 

were noted at 5 and 55 sites, respectively. Positive changes 

(increases) ranged from 4.3 percent (site 362) to 34.1 percent 

(site 112) with a median of 13.2 percent. Negative percentage 

1

The annual period from October 1 through September 30, designated by 

the year in which the period ends.

2

The annual period from April 1 through March 31, designated by the year 

in which the period begins.

changes (decreases) ranged from –3.3 percent (site 514) to 

–80.0 percent (site 308) with a median of –22.2 percent. 

The median percentage change for all 63 streamgages was 

–18.4 percent.

Streamflow statistics determined as a part of this compilation included minimum, mean, maximum, and flow-duration 

statistics of daily mean discharges for categorical periods. 

Flow-duration statistics based on the daily mean discharge 

records were compiled in this study for the 5th, 10th, 25th, 

50th, 75th, 90th, and 95th percentiles. Flow-duration statistics 

were determined for each complete water year of record 

at a streamgage as well as the available period of record 

(or selected periods if flows were regulated) and selected 

seasonal, monthly, and calendar day periods. In addition to the 

streamflow statistics compiled for each of the water years, the 

number of days the daily mean discharge was at or below the 

10th percentile was summed for each water year as well as the 

number of events during the water year when streamflow was 

consistently at or below the 10th percentile.

All low-flow characteristics for the streamgages 

were added into the StreamStatsDB, which is a database 

accessible to users through the recently released USGS 

StreamStats application for North Carolina. The minimum, 

mean, maximum, and flow-duration statistics of daily mean 

discharges based on the available (or selected if regulated 

flows) period of record were updated in the North Carolina 

StreamStatsDB. However, for the selected seasonal, monthly, 

calendar day, and annual water year periods, tab-delimited 

American Standard Code for Information Interchange (ASCII) 

tables of the streamflow statistics are available online to users 

from a link provided in the StreamStats application.
2 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Introduction

The future health and economic welfare of the Nation 

is dependent upon a continuing supply of uncontaminated 

fresh water. In North Carolina, competition for normally 

abundant, high-quality surface-water resources has increased 

in recent decades because of rising demand in response to 

a growing population. Recent droughts in the southeastern 

United States also have emphasized the need to better 

understand low-flow frequency and other streamflow (or flow 

or discharge, used interchangeably in this report) statistics 

for sustained water supplies and effective waste assimilation 

as well as ecological-flow requirements for the protection of 

aquatic resources in North Carolina.

The U.S. Geological Survey (USGS) has long been a 

source of streamflow statistics for streams in North Carolina 

(fg. 1) and serves as an objective source of hydrologic 

information for regulators and stream users. Since the 1960s, 

the USGS has provided site-specific estimates of low flow3, 

the vast majority of estimates in response to site-specific 

requests from outside the agency.

The North Carolina Division of Water Resources 

(NCDWR) within the Department of Environment and 

Natural Resources (DENR) uses low-flow characteristics 

and other streamflow statistics in its mission to provide the 

strategic information necessary to manage the State’s water 

resources and to assess the streamflow needed to maintain 

ecological integrity in surface waters. The division’s Water 

Quality Permitting Section—formerly the North Carolina 

Division of Water Quality (NCDWQ)—also uses low-flow 

characteristics in its mission to protect and enhance North 

Carolina’s surface-water and groundwater resources. State 

regulations require an Engineering Alternatives Analysis 

for all new and expanding wastewater treatment facilities, 

requiring permit applicants to contact the USGS for low-flow 

data (North Carolina Department Environment and Natural 

Resources, n.d.). Water resources planning and management 

by the NCDWR covers streams across 17 major river basins 

lying partially or wholly within the State boundaries (fg. 2).

In the most recent USGS statewide update of low-flow 

characteristics, Giese and Mason (1993) evaluated low-flow 

characteristics at 122 continuous-record streamgaging 

stations and 396 partial-record measuring sites having 

drainage areas ranging from 1 to 400 square miles (mi2) 

and streamflows unaffected by regulation or diversion. 

In conjunction with the basinwide management approach 

adopted by the former NCDWQ in the early 1990s, the 

USGS has conducted studies in North Carolina to define 

low-flow characteristics and develop discharge profiles for 

streams in selected river basins (Weaver, 1996, 1997, 1998; 

Weaver and Pope, 2001; Weaver and Fine, 2003; fg. 3).

Since 2003 no systematic and formal update of low-flow 

characteristics has been completed for streams in North 

Carolina other than updates associated with responding to 

3

Terms shown in bold are defined in the glossary.

site-specific low-flow requests. As a result of droughts since 

1998, updated low-flow characteristics at selected long-term 

USGS streamgaging stations have generally decreased from 

pre-1998 statistics by varying percentages (Weaver, 2005).

Streamflow statistics, including annual and monthly 

flow-duration statistics, also are a key component in evaluating ecologic integrity of the aquatic environment. In 2010, 

the passage of North Carolina General Assembly House Bill 

1743 mandated that the NCDWR convene an Ecological 

Flows Science Advisory Board (EF–SAB, North Carolina 

General Assembly, 2009) to advise the State on how to 

establish streamflow criteria that will protect the ecological 

integrity of streams (T.F. Cuffney, U.S. Geological Survey, 

written commun., June 26, 2014). The EF–SAB reviewed 

methods that have been developed to establish ecological 

flows in the United States, Canada, and Australia and aggregated and evaluated the extant biological and hydrologic data 

within the State. This review confirmed that flow-duration 

statistics are important in developing the relations between 

biological response measures and hydrologic variables that 

are required to establish science-based ecological-flow 

criteria.

In 2013, the USGS, in cooperation with the NCDWR, 

updated and evaluated low-flow characteristics and 

flow-duration statistics at selected continuous-record 

streamgaging stations (also referred to as streamgages) in 

North Carolina. The updated streamflow statistics provide 

regulators and planners with tools and relevant hydrologic 

information and data reflective of the recent droughts, which 

can be used to better manage the quantity and quality of 

water in North Carolina.

Streamflow statistics provided in this report support 

USGS priority water-resource issues at both the national 

and water science center levels. This study addresses 

the natural hazards strategic action under the long-term 

mission goals of the USGS to enhance understanding of the 

linkages among natural hazards, the environment, climate, 

and society, and the ways by which climate variability and 

change influence the frequency and intensity of naturalhazard events (U.S. Geological Survey, 2007). The study 

also addresses one of the USGS Cooperative Water Program 

priorities for fiscal year 2012 (U.S. Geological Survey, 

2011) to support data-collection activities and to establish 

comprehensive, uniform, and accurate data on surface water, 

groundwater, water quality, sediment, and water use. The 

study also supports the North Carolina District Science 

Plan (Bales and others, 2004) through interpretation and 

distribution of relevant hydrologic geospatial data having 

sufficient spatial and temporal resolution to support the 

water-resources needs of all users and will support waterresources management programs at State and local levels.
Introduction 

3

PITT

GREENE

BEAUFORT

WAKE

LEE

CUMBERLAND

HARNETT

HOKE

ROBESON

SCOTLAND RICHMOND

MOORE

JOHNSTON

WAYNE LENOIR

JONES

CARTERET

PAMLICO

CRAVEN

DUPLIN

COLUMBUS

BLADEN

BRUNSWICK

PENDER

ONSLOW

SAMPSON

FRANKLIN

WARREN

NASH

PERSON

RANDOLPH

ALAMANCE GUILFORD

STOKES

DAVIE

IREDELL

ROWAN

MONTGOMERY STANLY

UNION ANSON

CABARRUS MECKLENBURG

DAVIDSON

FORSYTH YADKIN

ROCKINGHAMCASWELL

DURHAM ORANGE

CHATHAM

GRANVILLEVANCE

WILSON

EDGECOMBE

NORTHAMPTON

HALIFAX

HERTFORD

MARTIN

BERTIE

HYDE

DARE TYRRELL

GATES

WASHINGTON

CURRITUCK CAMDEN PASQUOTANK PERQUIMANS CHOWAN

NEW HANOVER

ALEXANDER

CALDWELL

AVERY

WATAUGA

ASHE

WILKES

SURRY

ALLEGHANY

UNION

UNION

UNION

GASTON

CLEVELAND

MCDOWELL

POLK

YANCEY

MADISON

BUNCOMBE

HENDERSON TRANSYLVANIA RUTHERFORD

HAYWOOD

JACKSON

MACON

CLAY

SWAIN

GRAHAM

CHEROKEE

84° 83° 82° 81° 80° 79° 78° 77° 76°

VIRGINIA

TENNESSEE 36°

35°34°

GEORGIA

SOUTH CAROLINA

Blue RidgePiedmontCoastal PlainPhysiographic province boundary

0 80604020 100 MILES

0 80604020 100 KILOMETERS

EXPLANATION

Cape Fear

River

Contentnea

Creek

Falls

Lake

B. Everett

Jordan Lake

Flat

River

Little

River

North Buffalo

Creek

BuckhornReservoir Neuse

River

River

Yadkin

Deep

River High Rock Lake

W. Kerr Scott

Reservoir

Drowning

Creek

PeeDee

River

Rocky

River

ATLANTIC

OCEAN

Chatuge

Lake

Hiwassee

River

ANDREWS

DAM

John H. Kerr

Reservoir

Greenville

Raleigh

Greensboro

Concord

Charlotte

Shelby

Asheville

Base modified from digital files of:U.S. Geological Survey, 1:100,000 scale 

Wilmington

Southern

Pines

Figure 1. Selected rivers, lakes, metropolitan areas, counties, and physiographic provinces in North Carolina.
4 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations New Broad Watauga French Broad Catawba Hiwassee Savannah Little Tennessee Yadkin Roanoke Cape Fear Neuse Lumber Tar-Pamlico Pasquotank Chowan White Oak Major river basins in North Carolina EXPLANATION Raleigh Greensboro Charlotte Asheville SOUTH CAROLINA GEORGIA VIRGINIA KENTUCKY TENNESSEE Base modified from digital files of: U.S. Geological Survey, 1:100,000 scale 

0 100 MILES 500 100 KILOMETERS 50

76° 77° 78° 79° 80° 81° 82° 83° 84°

36°35°34°

ATLANTIC OCEAN

Figure 2. Seventeen major river basins used in North Carolina by State agencies to plan and manage water resources (North Carolina Department of Environment and Natural Resources, 2014).
Introduction 

5

Roanoke (Weaver, 1996)Deep (Weaver, 1997)Neuse (Weaver, 1998)Cape Fear (Weaver and Pope, 2001)Rocky (Weaver and Fine, 2003)

River basins

EXPLANATION

Raleigh

Greensboro

Charlotte

Asheville

76° 77° 78° 79° 80° 81° 82° 83° 84°

36°35°34°

ATLANTIC OCEAN

SOUTH CAROLINA

GEORGIA

VIRGINIA KENTUCKY

TENNESSEE

Base modified from digital files of:U.S. Geological Survey, 1:100,000 scale 

0 100 MILES 500 100 KILOMETERS 50

Figure 3. Selected river basins in North Carolina where basinwide low-flow studies were completed by the U.S. Geological Survey between 1996 and 2003.
6 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Purpose and Scope

This report presents updated low-flow characteristics 

along with minimum, mean, maximum, and flow-duration 

statistics of daily mean discharges for streamgages in North 

Carolina having 10 or more years of discharge records 

and provides links to the updated information available 

online through the USGS StreamStats application for North 

Carolina. The scope of the study includes the State of North 

Carolina.

Daily mean discharge records available through the 

2012 water year at active and discontinued streamgages in 

North Carolina were included where sufficient data were 

available for low-flow analyses and characterization of 

selected flow-duration statistics. No water years containing 

partial records during the annual period were used in this 

compilation. As of the 2012 water year, there were 224 and 

292 active and discontinued streamgages, respectively, along 

streams in North Carolina (fig. 4, fig. 5, table 1). Use of the 

2012 water year data resulted in streamflow records available 

84° 83° 82° 81° 80°

36°

35°

34°

SOUTH CAROLINA

GEORGIA

VIRGINIA

KENTUCKY

TENNESSEE

Greensboro

Charlotte

Asheville

Active

Active (excluded)

Streamgage and number

Blue Ridge

Piedmont

Coastal Plain

Physiographic provinces

EXPLANATION

Base modified from digital files of:

U.S. Geological Survey, 1:100,000 scale 

0 50 100 MILES

0 50 100 KILOMETERS

514

507

486

452

453

484

501 500

498

492

476

477

488

319 322

469

435

439

441

443

448

449

458

455

457

463

464

466

425 429

420 416

412

241

240

328

352

406

402

400

397

404

351

350

333

409

239

238

473

321

355

267

285

296

344

297

291

282

281 284

304

308

196

159 153

160 161 162

165

164

166

167

158

193

155 152

264

276

272

19

16

17

15

268

254

253

251 14

244

245

243

242

343

341

345

340

339

368

369

285

290 289

293

294 295

395

379

378

373

372 375

387

367 361

363

364

366

360 359

349

348

347

346

381

380

383

384

388

391

393

389

283

356

293

309

362

# #

#

#

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See inset

for site ids

304

406 Location of active sites in Mecklenburg County

#

*

*

*

*

*

**

*

*

** *

*

**

*

*

*

*

* ***

**

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*

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*

* *

*

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**

*

**

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* *

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*

Figure 4. Active continuous-record streamgages in western and eastern North Carolina as of the 2012 water year and 

physiographic provinces.
Introduction 7

Figure 4. Active continuous-record streamgages in western and eastern North Carolina as of the 2012 water year 

and physiographic provinces.—Continued

79° 78° 77° 76°

36°

35°

34°

SOUTH

CAROLINA

VIRGINIA

Raleigh

Active

Active (excluded)

Streamgage and number

Blue Ridge

Piedmont

Coastal Plain

Physiographic provinces

EXPLANATION

Base modified from digital files of:

U.S. Geological Survey, 1:100,000 scale 

ATLANTIC OCEAN

0 50 100 MILES

0 50 100 KILOMETERS

190

205

206

204

174

75

178

203

208 209

312 314

212

313

23

171

202

201 200 185

188

183

182

180

114 98

91

186

38

8687

76

81

77

79

29

28

177

176

39

96

116

100

97 101

95

102 108

109

112 111

106

80

83

85

84

215 220

147

138

233

144

31

52

51

50

46 44

45

41

123

53

121 122

118

130

129

57

59

8 7

11

35

67

316

315

317

217

237

#

#

#

#

#

#

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through March 31, 2012 (or the 2011 climatic year) being 

used to determine the updated low-flow characteristics.

Updated low-flow characteristics include the annual 

(climatic year) and winter 7-day, 10-year (7Q10, W7Q10) 

low-flow discharges; the 30-day, 2-year (30Q2) low-flow 

discharge; and the 7-day, 2-year (7Q2) low-flow discharge. 

The W7Q10 discharge, or winter 7Q10, is defined in a 

similar manner as the 7Q10 discharge, except that only 

streamflow during the 5 months of November through March 

were considered in the analysis.

The minimum, mean, maximum, and flow-duration 

statistics (5th, 10th, 25th, 50th, 75th, 90th, and 

95th percentiles) of daily mean discharges were compiled for 

the available periods of record or selected periods if flows 

were regulated. Flow-duration statistics were also compiled 

for other selected categorical periods. 

For each water year that flow-duration statistics were 

determined, the number of days in which the daily mean 

discharge was at or below the 10th percentile, number of 

events (one or more days) at or below the 10th percentile, 

and duration of the longest event are also presented. 
8 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Figure 5. Discontinued continuous-record streamgages in western and eastern North Carolina as of the 2012 water year and 

physiographic provinces.

516

513

512

511

515 510

505

504 503

508 506

509

459 458

489

490

485

502 499

495

496 497

494

491

493

479

478

480 482

483

481

487

320

327

467

468 470 471

472

437 436

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84° 83° 82° 81° 80°

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SOUTH CAROLINA

GEORGIA

VIRGINIA

KENTUCKY

TENNESSEE

Greensboro

Charlotte

Asheville

Discontinued

Discontinued (excluded)

Streamgage and number

Blue Ridge

Piedmont

Coastal Plain

Physiographic provinces

EXPLANATION

Base modified from digital files of:

U.S. Geological Survey, 1:100,000 scale 

0 50 100 MILES

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465

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Introduction 9

Figure 5. Discontinued continuous-record streamgages in western and eastern North Carolina as of the 2012 water 

year and physiographic provinces.—Continued

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79° 78° 77° 76°

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SOUTH

CAROLINA

VIRGINIA

Raleigh

Discontinued

Discontinued (excluded)

Streamgage and number

Blue Ridge

Piedmont

Coastal Plain

Physiographic provinces

EXPLANATION

Base modified from digital files of:

U.S. Geological Survey, 1:100,000 scale 

ATLANTIC OCEAN

0 50 100 MILES

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10 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Previous Low-Flow Studies

Prior to World War II, low-flow characteristics of North 

Carolina streams were determined only for continuous-record 

streamgaging stations. Following World War II and the 

subsequent economic expansion, there was an increasing 

need for hydrologic information at sites where no data had 

previously been collected (Yonts, 1971). Thus, the USGS 

expanded its data-collection program in the late 1940s to 

include partial-record measurement sites where discharge 

measurements were made on a periodic basis. Discharge 

measurements made under base-flow conditions, along with 

observations of zero flow, provided the data used in the initial 

assessments of low-flow characteristics of streams in North 

Carolina. With data available from the network of partialrecord measuring sites, the USGS began to respond to requests 

for low-flow characteristics on a site-specific basis, including 

those for ungaged sites.

Several studies have been conducted to investigate 

low flows along streams in North Carolina. Goddard (1963) 

presented low-flow characteristics for many continuous-record 

streamgaging stations in North Carolina, along with drainage 

area and 7Q10 discharge profiles developed for selected mainstem rivers. Yonts (1971) reported base-flow measurements 

made at over 2,200 locations, including continuous-record 

streamgaging stations and partial-record measuring sites 

throughout the State. 

Giese and Mason (1993) evaluated low-flow 

characteristics at 122 continuous-record streamgaging stations 

and 396 partial-record measuring sites having drainage areas 

ranging from 1 to 400 mi2

 and streamflows unaffected by 

regulation or diversions. Sites were characterized on the basis 

of similarity in their ranges of low-flow discharge and potential to sustain base flow. Ten hydrologic areas (HAs) were 

delineated and regression equations relating low-flow characteristics to basin characteristics were derived for ungaged 

sites. Equations for only 4 of the 10 hydrologic areas—HA10, 

representing the mountains and western Piedmont; HA3, 

representing the Sand Hills; and HAs 5 and 9, representing 

the eastern and central Piedmont, respectively—had standard 

errors considered small enough to permit use of the regression 

equations to estimate low-flow characteristics at the ungaged 

sites.

Evett (1994) investigated the effects of urbanization 

and land-use changes on low flows. Trends of decreasing 

low flows with increasing urbanization were detected in data 

from selected continuous-record streamgaging stations in the 

Asheville, Charlotte, Greensboro, and Raleigh metropolitan 

areas (fig. 1) and at streamgaging stations in nearby rural 

areas. Because of the decreasing trends noted at both urban 

and rural streamgaging stations used in the analyses, Evett 

described the results as being statistically inconclusive.

Weaver (1996) studied low-flow characteristics in the 

Roanoke River Basin as part of the former NCDWQ program 

of basinwide assessment and management of water quality 

in major river basins of North Carolina (fig. 3). Low-flow 

characteristics were summarized for 82 streamflow sites 

(79 sites in North Carolina and 3 sites in Virginia) and profiles 

of drainage area and low-flow discharge were developed 

for 10 selected streams. Total drainage areas for the profiled 

streams range from 22 mi2 to about 9,700 mi2. Low-flow 

discharges for each stream included 7Q10, 30Q2, W7Q10, and 

7Q2 discharges in a continuous profile, and contributions from 

major tributaries also were included.

Weaver (1997) also investigated low-flow characteristics 

in the Deep River Basin in the central Piedmont Province of 

North Carolina (fig. 3). The Deep River is tributary to the 

Cape Fear River and drains slightly over 1,440 mi2

 in parts of 

Guilford, Randolph, Moore, and Chatham Counties. Low-flow 

characteristics were summarized for 7 continuous-record 

streamgaging stations and 23 partial-record measuring sites. 

Drainage-area and low-flow discharge profiles were developed 

for the Deep River and were presented in a similar manner as 

those for the Roanoke River Basin (Weaver, 1996).

Continuing the series of basinwide low-flow investigations, Weaver (1998) summarized low-flow characteristics for 

50 continuous-record streamgaging stations and 113 partialrecord measuring sites in the Neuse River Basin (fig. 3). 

Drainage-area and low-flow discharge profiles were developed 

for 10 selected streams in the basin. Drainage areas for the 

profiled streams range from 9 to about 5,600 mi2. The lowflow discharges for each stream include 7Q10, 30Q2, W7Q10, 

and 7Q2 discharges in a continuous profile with contributions 

from major tributaries.

Weaver and Pope (2001) also compiled low-flow characteristics for 67 continuous-record streamgaging stations and 

121 partial-record measuring sites in the Cape Fear River Basin 

(fig. 3). Drainage-area and low-flow discharge profiles were 

developed for 13 selected streams in the basin. Total drainage 

areas for the profiled streams range from about 44 to almost 

9,100 mi2. As with the basins discussed previously, low-flow 

discharges for each stream in the Cape Fear River Basin include 

7Q10, 30Q2, W7Q10, and 7Q2 discharges in a continuous 

profile with contributions from major tributaries. Because the 

Deep River is part of the Cape Fear River Basin, the summary 

of low-flow characteristics at continuous-record streamgaging 

stations and partial-record measuring sites in the Deep River 

Basin (Weaver, 1997) was republished in the Cape Fear River 

report (Weaver and Pope, 2001). However, the drainage-area 

and low-flow discharge profiles developed for the Deep River 

and associated discussions of low-flow characteristics were not 

republished in Weaver and Pope (2001).

Weaver and Fine (2003) investigated low-flow characteristics in the Rocky River Basin in the southern Piedmont Province 

of North Carolina (fig. 3). The Rocky River is tributary to the 

Pee Dee River and drains slightly over 1,410 mi2

 in parts of 

Iredell, Rowan, Mecklenburg, Cabarrus, Stanly, Union, and 

Anson Counties. Low-flow characteristics were summarized 

for 12 continuous-record streamgaging stations and 44 partialrecord measuring sites. Drainage-area and low-flow discharge 

profiles were developed and presented for the Rocky River.
Low-Flow Characteristics 11

Low-Flow Characteristics

Where sufficient discharge records are available for 

specific streamgages, application of statistical techniques, such 

as those described by Riggs (1972), Stedinger and Thomas 

(1985), and Helsel and Hirsch (2002), form the basis for 

determining low-flow characteristics and other streamflow 

statistics. A summary and brief description of the low-flow 

characteristics compiled in this study are provided in table 2.

Low flow, also referred to as base flow or sustained fairweather flow, is composed largely of groundwater discharge 

from aquifers to streams. Groundwater discharges have large 

spatial and temporal variations that are highly dependent on 

topographic, geologic, land use, and climatic conditions. The 

high variability of such conditions across North Carolina, 

and sometimes even within a drainage basin or along a single 

stream, results in complex low-flow hydrology. Moreover, the 

characterization of low-flow hydrology is further complicated 

by withdrawals, point-source discharges, impoundments, 

Table 2. Selected streamflow statistics compiled for U.S. Geological Survey continuous-record streamgaging stations in North Carolina.

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. The flow-duration statistics were computed for categorical periods including the period of record, 

each complete water year of record, selected seasonal, monthly, and calendar day periods of observed daily mean discharges]

Flow statistic Units Description

Low-flow characteristics

Annual 7-day, 10-year lowflow discharge (7Q10)ft3

/s Discharge value that the annual minimum average streamflow for a 7-consecutive-day 

period is equal to or lower than, on average, once every 10 years

Annual 30-day, 2 year lowflow discharge (30Q2)ft3

/s Discharge value that the annual minimum average streamflow for a 30-consecutive-day 

period is equal to orlower than, on average, once every 2 years

Winter 7-day, 10-year lowflow discharge (W7Q10)ft3

/s Discharge value that the winter (November through March) minimum average streamflow 

for a 7-consecutive-day period is equal to or lower than, on average, once every 10 years

Annual 7-day, 2-year lowflow discharge (7Q2)ft3

/s Discharge value that the annual minimum average streamflow for a 7-consecutive-day 

period is equal to or lower than, on average, once every 2 years

Average, minimum, and maximum discharges

Average discharge ft3

/s Average of mean daily discharge based on historical data observed for a defined 

categorical period

Minimum discharge ft3

/s Minimum daily mean discharge based on historical data observed for a defined 

categorical period

Maximum discharge ft3

/s Minimum daily mean discharge based on historical data observed for a defined 

categorical period

Flow-duration statistics

5th percentile

(non-exceedance)

ft3

/s Daily mean discharge not exceeded 5 percent of the time during the categorical period

10th percentile

(non-exceedance)

ft3

/s Daily mean discharge not exceeded 10 percent of the time during the categorical period

25th percentile

(non-exceedance)

ft3

/s Daily mean discharge not exceeded 25 percent of the time during the categorical period

50th percentile

(non-exceedance, median)

ft3

/s Daily mean discharge not exceeded 50 percent of the time during the categorical period 

(median)

75th percentile

(non-exceedance)

ft3

/s Daily mean discharge not exceeded 75 percent of the time during the categorical period

90th percentile

(non-exceedance)

ft3

/s Daily mean discharge not exceeded 90 percent of the time during the categorical period

95th percentile

(non-exceedance)

ft3

/s Daily mean discharge not exceeded 95 percent of the time during the categorical period

Selected flow statistics for each complete water year of record

Number of occurrences below 

10th exceedance percentile

Number

of days

Number of observed discharge values at or below the 10th percentile for the indicated full 

water year

Number of events below 10th 

exceedance percentile

Number

of days

Number of events during the indicated full water year with observed discharge values at or 

below 

the 10th percentile, where an event is an occurrence of one or more consecutive days

Maximum duration among 

events during indicated 

period

Number

of days

Maximum duration among the number of events identified for the indicated full water year
12 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

and land use within the drainage basin. Low flows in North 

Carolina typically occur at the end of the growing season in 

late summer and early autumn as a result of evaporation from 

surface-water bodies and use of groundwater in the form of 

soil moisture by crops and other vegetation. In addition, the 

relatively high temperatures of summer and early autumn 

encourage increased water use, which results in high demand 

for withdrawals from streams, reservoirs, and groundwater 

wells. An understanding of low-flow characteristics is crucial 

for evaluating water-supply potential and reservoir-release 

requirements, determining and regulating wastewater 

discharges to streams, and maintaining aquatic habitats in 

streams.

Computational Procedures for Low-Flow 

Characteristics

Low-flow characteristics are defined by a set of 

discharges that are statistically derived values having an 

associated duration (expressed in days) and recurrence 

interval (also referred to as return period and expressed in 

years). The recurrence interval represents the average period 

of time between occurrences of a specified low-flow hydrologic event. An example of a widely used low-flow statistic is 

7Q10 discharge. In non-exceedance probability terminology, 

the annual minimum average streamflow for a 7-consecutiveday period will be equal to or lower than the 7Q10 discharge, 

on average, once every 10 years. If the 7Q10 discharge is 

5 cubic feet per second (ft3

/s), then the annual minimum 

average streamflow for a 7-consecutive-day period would be 

5 ft3

/s or lower, on average, once every 10 years, 5 times every 

50 years, or 10 times every 100 years. Alternatively, in terms 

of exceedance probability, a recurrence interval of 10 years 

implies that the annual minimum average streamflow for a 

7-consecutive-day period will exceed the 7Q10 discharge, on 

average, in 9 of 10 years. Stated differently, the probability 

is 10 percent (the inverse of the recurrence interval) that the 

lowest average 7-consecutive-day streamflow in any given 

year will be less than the 7Q10 discharge.

Recurrence intervals, regardless of length, always 

refer to an average period of time in years during which the 

streamflow at a given streamgage will be equal to or less than 

the associated low-flow statistic once. A 10-year recurrence 

interval does not mean that the streamflow will be at or less 

than the 7Q10 only once every 10 years. It does indicate, 

however, that the streamflow may be at or less than the 7Q10, 

on average, once during a 10-year period. It is possible 

that streamflows could be at or below the low-flow statistic 

multiple times or at no time during the stated recurrence 

interval.

The accuracy of low-flow statistics at streamgages is 

related to the length of record (sample from the population) 

upon which the statistics are based (Feaster and Guimaraes, 

2012). For a given streamgage, as the period of record 

covering a broad range of hydrologic conditions increases, the 

low-flow statistics will be increasingly accurate or reflective 

of long-term conditions. Thus, as the length of record at a 

streamgage increases, the low-flow statistics are moving 

toward values that would be expected to be obtained from the 

population and tend to be less influenced by extreme conditions, whether wet or dry. Awareness of this consideration 

thus results in a recommendation that streamflow statistics 

be updated about once every 10 years where resources 

permit. Use of a 10-year interval also allows for the inclusion 

of newer streamgages having sufficient periods of record, 

with a recommended minimum of 10 years for each station 

(Riggs, 1972).

In North Carolina, other low-flow characteristics besides 

the 7Q10 used by State regulatory agencies in determining 

permitting limits for withdrawals from and discharges to 

streams include the 30Q2 discharge; W7Q10 discharge; and 

7Q2 discharge. The W7Q10 discharge, or winter 7Q10, is 

defined in a similar manner as the 7Q10 discharge except that 

only streamflow during the 5 months from November through 

March are considered in the analysis.

Statistical methods used by the USGS to determine 

low-flow characteristics are documented in Riggs (1972) and 

Stedinger and Thomas (1985). An effective description of 

these methods is provided by Feaster and Guimaraes (2012), 

part of which is presented here. The low-flow characteristics 

compiled in this study were computed using the SWSTAT 

software available from the USGS Office of Surface Water 

(http://water.usgs.gov/software/SWSTAT/). An internal Perl 

routine was developed for the Unix platform to handle 

manipulation of daily mean discharges at the streamgages 

and to use the SWSTAT software to compute the low-flow 

characteristics.

Low-flow frequency statistics at continuous-record 

streamgages are computed by fitting a series of annual 

minimum N-day average streamflows to some known 

statistical distribution, where N can equal any number from 

1 to 365. Using available periods of record, the low-flow 

frequency statistics for this study were computed by fitting 

base 10 logarithms of the annual and (or) winter minimum 

7- and 30-day average streamflows to a Pearson Type III 

distribution, which also is referred to as a log-Pearson Type 

III distribution or frequency curve. The frequency curve 

developed from the fitted distribution depicts the relation 

between recurrence interval and the lowest average annual 

discharge for a specified number of days at a streamgage 

(Riggs, 1972). The Pearson Type III distribution is commonly 

used because it generally corresponds closely to the distribution of annual low flows for sites having long-term periods of 

record. The USGS uses a 30-year criterion to identify those 

streamgages having long-term periods of streamflow record 

(U.S. Geological Survey, 2009).

Fitting the distribution requires calculating the mean, 

standard deviation, and skew coefficient of the logarithms 

of the N-day streamflows. Estimates of the N-day nonexceedance flows for a specified recurrence interval, T, are 

computed by using the following equation: 
Low-Flow Characteristics 13

 

(1)

where 

Q is the N-day low flow, in cubic feet per second; 

T is the recurrence interval, in years;

 is the mean of the logarithms of the annual

 minimum N-day average streamflows; 

K is a frequency factor that is a function of the

 recurrence interval and the coefficient of 

 skew; and 

S is the standard deviation of the logarithms of

 the annual minimum N-day average streamflows.

An example of a frequency curve is shown for the longterm streamgage on Elk Creek at Elkville in Wilkes County 

(site 239, fig. 4). The curve depicts the relation between the 

recurrence interval and the annual minimum 7-day average 

streamflow at this streamgage. The points plotted on the graph 

correspond to the annual minimum 7-day average streamflows 

that were observed during the period of analysis used to 

develop the low-flow characteristic. The 7Q10 discharge for 

this streamgage, which is read from the frequency curve, is 

13.0 ft3/s (fig. 6).

100

10

1

Annual minimum 7-day average streamflow, in cubic feet per second

1.02 1.05 1.1 1.25 1.5 2

Recurrence interval, in years

3 5 10 20 50

Annual minimum 7-day average streamflow

Log-Pearson Type III frequency curve

EXPLANATION

7Q10 discharge = 13.0 cubic feet per second (see table 3)

Figure 6. Low-flow frequency curve of annual minimum 7-day average streamflow using log-Pearson Type III 

frequency distribution at Elk Creek at Elkville in Wilkes County, North Carolina (site 239, fig. 4).

logQ X KS, T = +

X
14 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Quality Assurance Procedures

For this study, a quality assurance and quality control 

(QAQC) analysis was completed for the annual minimum 

7- and 30-day, winter minimum 7-day average streamflow data 

for the streamgages that had a minimum of 10 years of record. 

The data at each streamgage were reviewed for homogeneity, a 

prerequisite for statistical analysis that implies relatively stable 

basin conditions during the period of record. The Kendall’s 

tau test was used to assess the homogeneity of the annual 

minimum 7- and 30-day, and winter minimum 7-day average 

streamflow data for all streamgages (Helsel and Hirsch, 2002).

The Kendall’s tau statistical test was used to detect 

monotonic trends in the annual minimum 7- and 30-day, 

winter minimum 7-day average streamflow over time. 

Specifically, the test uses the relation (trend) between time 

and ranked discharges as opposed to discharge magnitude 

(Helsel and Hirsch, 2002; Barbie and Wehmeyer, 2012). The 

trend analyses thus refer to the direction and not the magnitude 

of streamflow change. A statistically significant positive 

Kendall’s tau value indicates an upward monotonic streamflow 

trend; conversely, a statistically significant negative tau 

indicates a downward monotonic streamflow trend. The 

probability value or p-value of Kendall’s tau is a measure 

of the statistical significance of the trend. For this study, a 

p-value of less than 0.05 is assumed to indicate a statistically 

significant trend, whereas, a p-value of 0.05 or greater is 

assumed to indicate no significant trend.

If a trend (non-homogeneity) was indicated, additional 

assessments were used to determine if the trend may have 

been caused by a short-term condition. For example, if the 

period of record for a streamgage happened to begin or end 

under extreme conditions (excessively wet or dry), the test 

may indicate a trend, but additional analysis that excludes 

the extreme events may indicate no trend (fig. 7). As noted 

by Lins and others (2010), sometimes hydrologic records for 

a timeframe of a few years to a few decades may indicate a 

trend in the data, but when viewed in the context of longer 

timeframes spanning decades to centuries, the short-term 

trends may be recognized as part of a much longer term 

oscillation. Trends at unregulated streamgages may result 

from changes in climatic cycles, land use, changes in upstream 

diversions for water supply or waste treatment purposes, 

groundwater pumpage, or other practices that may affect 

groundwater levels.

0.01

0

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

10

0

20

30

40

50

60

70

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

Kendall tau p-value, dimensionless

Climatic year

Annual minimum 7-day average streamflow, in cubic feet per second

Trend test threshold (p-value = 0.05)

7Q10 discharge, in cubic feet per second

Kendall tau p-value

EXPLANATION

Annual minimum 7-day average streamflow,

in cubic feet per second

Figure 7. Annual minimum 7-day average streamflow, 7Q10 discharge, and Kendall tau p-value for 

the 1966–2011 climatic years at Elk Creek at Elkville in Wilkes County, North Carolina (site 239, fig. 4).
Low-Flow Characteristics 15

For streamgages downstream from a major source of 

regulation, such as a dam, the data were assessed for gross 

trends, which may indicate a long-term change in the pattern 

of regulation (William Kirby, U.S. Geological Survey, written 

commun., June 6, 2005). Additionally, some investigations 

have shown that urbanization can lead to a reduction in 

low flows (U.S. Environmental Protection Agency, 2012). 

Final decisions to include or exclude data from a specific 

streamgage were made by applying hydrologic judgment to 

the results of the QAQC analyses.

The components of the QAQC reviews that were 

conducted for the streamgages, where appropriate and deemed 

as needed, are as follows:

•	 The Kendall’s tau test was used to check for trends in the 

annual minimum 7- and 30-day, winter minimum 7-day 

average streamflow data over time (fig. 7).

•	 A plot of the annual minimum 7-day average streamflow 

against climatic year was created and used along with the 

Kendall’s tau results to visually assess potential trends.

•	 A plot of the relation of the ratio of the 10th percentile 

to the 50th percentile of the average 7-day streamflows 

(loratio) against climatic year was created and used to 

graphically assess potential trends.

•	 A plot of the relation of the 50th percentile of the average 

7-day streamflow against climatic year was created and 

used to assess potential changes in the median average 

7-day streamflow over time.

•	 A plot of the relation of the cumulative loratio against 

climatic year was created and examined for significant 

change in slope, which indicates a change in streamflow 

patterns.

•	 A plot of the relation of the cumulative 50th percentile of 

the average 7-day streamflow against climatic year was 

created and examined for significant change in slope, 

which indicates changes in the median average 7-day 

streamflow patterns.

Results of Quality Assurance Analyses

Analyses of the trend tests resulted in the identification 

of 76 streamgages having potential trends in one or more 

of the following flow characteristics: annual minimum 

7-day average streamflow, annual minimum 30-day average 

streamflow, and winter minimum 7-day average streamflow. 

For those sites, plots of the annual minimums were examined 

to determine if the trend occurrences were synchronous with 

known drought periods, particularly those that have occurred 

in North Carolina since the late 1990s (Weaver, 2005). 

Additionally, plots of the computed loratio, 10th percentiles, 

and 50th percentiles of annual minimum 7-day average 

streamflow by climatic year were examined, as needed, for 

any gross variations in patterns that could possibly indicate 

other factors that would preclude the publication of low-flow 

characteristics. 

Among the 76 sites where potential trends were detected, 

the indication of a trend at 60 streamgages was probably 

due to the period of record ending within a drought period, 

particularly those sites with records through the 2012 water 

year. As a result of this conclusion, a decision was made to 

proceed with the publication of low-flow characteristics for 

those streamgages.

An example of such a site is Elk Creek at Elkville 

(site 239, table 1) in southwestern Wilkes County where 

streamflow records have been collected continuously 

since October 1965. Beginning with 10 years of record 

(1975–85 climatic years), trend tests completed on incrementally longer periods having an April 1, 1975, start date yielded 

p-values that were consistently 0.05 or higher (indicating no 

trend) until the period analyzed included the 2011 climatic 

year, the last year used in the period of analysis (fig. 7). 

Although the p-value does not fall below 0.05 until the last 

year of record used in the analysis, the trend tests indicate the 

p-value also was close to the 0.05 threshold in the 2002 and 

2008 climatic years, which includes droughts that have been 

observed since 1998 (Weaver, 2005). A decision was thus 

made to include this site among those for which low-flow 

characteristics are published herein.

For the remaining 16 of the 76 sites, examination of the 

plots resulted in a decision to refrain from publishing the lowflow characteristics. Reasons for these decisions ranged from a 

site demonstrating a trend during a short period of record (for 

example, site 60, table 1), presence of discontinuous periods of 

record that resulted in trends among the sub-periods (site 87,

table 1), or known substantial changes in upstream regulation 

(sites 206, 215, and 217; table 1). This group of 16 sites 

included 9 active and 7 discontinued streamgages.

Low-flow characteristics have previously been published 

for 8 of the aforementioned 16 streamgages (Giese and 

Mason, 1993; Weaver, 1996, 1997, 1998; Weaver and Pope, 

2001; Weaver and Fine, 2003). These streamgages are sites 

83, 185, 191, 194, 206, 215, 217, and 506 (table 1). Except 

at the two discontinued sites (191 and 506), additional data 

were collected at these streamgages following publication of 

previous low-flow characteristics. Trends present in the record 

for the remaining sites were attributed to streamflow affected 

by both recent droughts and upstream effects associated with 

diversions or impoundments. A decision was therefore made 

not to publish low-flow characteristics for these sites in this 

report. For the two discontinued sites, the new analyses previously described provided additional insight concerning the 

streamflow record and resulted in the decision to not republish 

the low-flow characteristics for these streamgages. 

Low flow characteristics for sites 206, 215, and 217, 

were previously published in the basinwide low-flow report 

for the Cape Fear River Basin (Weaver and Pope, 2001), but 

the updated statistics were not published in this report because 

of changes in the reservoir management plan for B. Everett 
16 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Jordan Lake. Streamflows at these three streamgages are affected 

by regulated flow releases from the impoundment. Inspection 

of the trend plots for the period of regulated streamflow through 

the 1997 climatic year do not indicate trends for the periods 

of analysis used in the basinwide study. However, inclusion of 

additional record beginning with the 1998 climatic year results in 

trends being noted in the annual 7- and 30-day minimum series.

Inspection of the annual minimum 7-day average 

streamflows at these three streamgages along the Cape Fear 

River (sites 206, 215, and 217) indicate visibly distinct 

changes in the variation of the annual minimums between 

the 1982–97 and 1998–2011 climatic years (fig. 8). At the 

streamgage at Lillington (site 206), the annual minimum 7-day 

average streamflow ranged from 501 to 636 ft3

/s and from 

206 to 811 ft3

/s during these two sub-periods, respectively. 

The median of these annual minimums decreased from 

597 ft3

/s during the 1982–97 climatic years to 452 ft3/s during 

the 1998–2011 climatic years, representing a –24.3-percent 

change. Similarly, at the streamgage near Tarheel (site 215), 

the annual minimum 7-day average streamflow ranged from 

787 to 1,291 ft3

/s and from 373 to 1,746 ft3/s during these two 

sub-periods, respectively. The median of these annual minimums 

decreased from 878 ft3

/s during the 1982–97 climatic years to 

675 ft3

/s during the 1998–2011 climatic years, representing a 

–23.1-percent change. At the streamgage near Kelly (site 217), 

the annual minimum 7-day average streamflow ranged from 

834 to 1,573 ft3

/s and from 323 to 1,896 ft3/s during these two 

sub-periods, respectively. The median of these annual minimums 

decreased from 941 ft3

/s during the 1982–97 climatic years to 

670 ft3

/s during the 1998–2011 climatic years, representing a 

–28.8-percent change. The relatively greater percentage change 

at the downstream streamgage near Kelly indicates that there 

may be other possible factors affecting the flow characteristics 

at this location on the river. Identifying other possible factors is 

beyond the scope of this study, however, and subsequent data 

collection and investigation would be necessary to confirm or 

refute such factors.

Since completion of the Cape Fear basinwide low-flow 

report (Weaver and Pope, 2001), the management of Jordan Lake 

and the Drought Contingency Plan (DCP) have been modified 

several times. Recent correspondence with the U.S. Army Corps 

of Engineers indicates that drought conditions since the mid to 

late 1990s resulted in deviations or modifications to the DCP in 

1998, 2001, 2002, 2005, and 2006 (Ashley Hatchell, U.S. Army 

Corps of Engineers, written commun., November 14, 2013). 

Each year, as agreed upon by resource agencies, the modification was slightly different and more proactive than before, but 

basically dealt with modifying the target flow at Lillington based 

on the remaining “water-quality storage” within the conservation 

pool that is used to set flow releases from B. Everett Jordan 

Lake. The drought of 2007 brought about the current version of 

the DCP, formally approved in 2008, and allows for varying the 

releases from B. Everett Jordan Lake to reduce the target flow 

at Lillington. Because this most recent plan has only been in 

place for about 6 years, the recommended minimum data period 

of 10 years under the current operating plan is not available to 

compute updated streamflow statistics for the site with any level 

of confidence. Consequently, a decision was made to refrain 

from publishing updated low-flow characteristics for sites 206, 

215 and 217 in this report. Based on the information that the 

2007 drought brought about the current DCP, 2016 is the earliest 

the minimum 10 years of continuous streamflow data would be 

available for use in an updated low-flow analysis.

At the Flat River at Bahama streamgage (site 81, table 1), 

reviews of the analyses completed for this site revealed that 

closure of an upstream mill operated prior to December 1962 

may have altered the range in magnitudes of annual minimum 

7-day average streamflows (T.D. Feaster, U.S. Geological 

Survey, written commun., August 8, 2014). This factor was 

not accounted for in the low-flow characteristics previously 

published for this site (Weaver, 1998). Upon further review of 

the analyses, however, the period analyzed for the streamgage 

on Flat River was modified to begin with the 1963 water year 

following closure of the upstream mill. Subsequent analyses of 

the redefined period indicate the presence of trends following the 

drought in late 2007 into 2008, and thus, are probably a reflection of this event. Consequently, a decision was made to provide 

the low-flow characteristics for this streamgage (based on the 

redefined period of analysis), which supersede those published in 

the Neuse River low-flow report (Weaver, 1998).

Examination of the trend analyses for station number 

02090380 on Contentnea Creek near Lucama in Wilson County 

(site 123, table 1) led to the recognition that a new dam had 

been constructed for the upstream Buckhorn Reservoir (fig. 1) 

during the late 1990s. Low-flow characteristics were previously 

published for this streamgage in the basinwide low-flow report 

for the Neuse River Basin (Weaver, 1998) based on period 

of record through the 1996 water year, which reflected the 

streamflow patterns associated with the old dam. In this study, 

the period of analysis for the streamgage on Contentnea Creek 

was modified to begin with the 2000 water year following 

completion of the new dam in 1999. Although the post-1999 

period of record is relatively short, no trends were detected in the 

analyses for the new period.

Similarly, information for station number 02133500 on 

Drowning Creek near Hoffman in Richmond County (site 313,

table 1) indicates that diversions made 0.5 mile upstream 

from the streamgage for public water supply in the Town of 

Southern Pines (fig. 1) have been in place since 1984. Initial 

trend analyses based on the period of record beginning with 

the 1940 water year indicated trends that appear in the 1980s, 

which is consistent with the start of the diversions. Low-flow 

characteristics were previously published for this streamgage in 

the statewide low-flow report (Giese and Mason. 1993) based on 

a period of record through the 1988 water year, which reflected 

the streamflow patterns prior to the start of diversions. In this 

study, the period of analysis for the streamgage on Drowning 

Creek was redefined to begin with the 1985 water year. Reanalysis indicated the presence of trends since 2010 was probably a 

reflection of the recent droughts. Thus, a decision was made to 

provide the low-flow characteristics for this streamgage.
Low-Flow Characteristics 17

1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

B

900

800

700

600

500

400

300

200

100

0

0.1

0.09

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0

Climatic year

A

Median, 1982–97 climatic years,

597 cubic feet per second

Annual minimum 7-day average streamflow

Annual minimum 7-day average streamflow, median 1982–97 climatic years

Annual minimum 7-day average streamflow, median 1998–2011 climatic years

Kendall tau p-value

Trend test threshold (p-value = 0.05)

EXPLANATION

2,000

1,800

1,600

1,400

1,200

1,000

800

600

400

200

0

2,000

1,800

1,600

1,400

1,200

1,000

800

600

400

200

0

0.1

0.09

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0

Kendall tau p-value, dimensionless

C

0.1

0.09

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0

Median, 1998–2011 climatic

years, 452 cubic feet

per second, –24.3 percent

Median, 1982–97 climatic years,

878 cubic feet per second Median, 1998–2011 climatic

years, 675 cubic feet

per second, –23.1 percent

Median, 1982–97 climatic years,

941 cubic feet per second Median, 1998–2011 climatic

years, 670 cubic feet

per second, –28.8 percent

Annual minimum 7-day average streamflow, in cubic feet per second

Figure 8. Annual minimum 7-day average streamflows at A, Cape Fear River at Lillington (site 206), B, Cape Fear 

River at William O. Huske Lock 3 near Tarheel (site 215), and C, Cape Fear River at Lock 1 near Kelly (site 217, fig. 4).
18 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Trend analyses also resulted in the periods of record 

being redefined for three other sites (sites 141, 166, and 513,

table 1). For station number 02092000 on Swift Creek near 

Vanceboro in Craven County (site 141), plots of the annual 

7-day minimum series indicate rather sudden increases in the 

annual values beginning in the mid-1960s. Further investigation yielded information indicating the stream was canalized 

during 1964, a consideration that was not accounted for during 

the analyses completed for the Neuse River basinwide lowflow study (Weaver, 1998). Low-flow characteristics published 

for this streamgage in this report were based on a redefined 

period beginning with the 1965 water year and supersede 

those published in the previous Neuse River low-flow report 

(Weaver, 1998).

Trend analyses also resulted in a redefined period of 

analysis for station number 02095500 on the North Buffalo 

Creek near Greensboro (site 166, table 1). Historical information obtained during this study concerning operations at an 

upstream wastewater treatment plant along North Buffalo 

Creek resulted in the period of analyses being redefined to 

start with the 1960 water year following a plant expansion 

completed in 1959 (City of Greensboro, North Carolina, n.d.). 

Low-flow characteristics published for this streamgage 

(site 166) in this report were based on the redefined period 

beginning with the 1960 water year and exhibited no trends 

in the plots, thereby superseding those published in the Cape 

Fear River low-flow report (Weaver and Fine, 2003).

Trend analyses for station number 03548500 on the 

Hiwassee River above Murphy in Cherokee County (site 513,

table 1) resulted in a redefined period of analysis for the 

streamgage beginning with the 1971 water year. Streamflow at 

this streamgage is regulated by two upstream impoundments 

(Andrews Dam and Chatuge Lake, fig. 1). Inspection of 

the loratio (ratio of 10th to 50th percentiles 7-day average 

streamflow) plotted by time suggests an apparent shift in 

operational practices beginning about 1970. Subsequent trend 

analyses on the redefined period indicate trends in the annual 

7-day minimum series for the 1997–2004 water years. Because 

this period is generally concurrent with recent droughts since 

the late 1990s, a decision was made to publish the low-flow 

characteristics for this streamgage using the redefined period.

Updated Low-Flow Characteristics Through 

2012

Use of available streamflow record during the 2012 

water year allowed updated low-flow characteristics to 

be determined through the end of the 2011 climatic year 

(March 31, 2012). Low-flow characteristics updated for 

this study are provided in table 3. To determine low-flow 

characteristics at a continuous-record streamgage, a minimum 

of 10 climatic years of record are recommended to develop 

the frequency curve. However, the length of observed period 

of record (in water years) at a streamgage will not equate 

to the same number of climatic years that may be available 

for low-flow analysis. Depending on the beginning and end 

months of the record used, as well as the presence of discontinuous periods that may exist within the overall record, the 

number of available climatic years of record may be less than 

the number of years of observed record.

Of the 516 streamgages considered for this study, 224 

remain active (as of the 2012 water year) and 292 have been 

discontinued. Flow conditions upstream from the streamgages 

represent a range of conditions: (1) unregulated, (2) regulated, 

(3) tidally affected, and (4) a combination of minor regulation 

and (or) diversions caused by municipalities, power plants, 

and (or) industries located upstream from the sites. The flow 

conditions were identified for the streamgages based on known 

upstream factors (for example, reservoirs and impoundments) 

that affect streamflows as well as historical information 

published in USGS water data reports (table 1).

The presence of documented tidal effects resulted in 

the exclusion of 4 active and 15 discontinued streamgages 

from further analyses. Although techniques are available for 

filtering tidally affected discharge records, application of these 

techniques was beyond the scope of the study.

Among the remaining 220 active and 277 discontinued 

sites, 180 and 139 sites, respectively, had 10 or more years of 

observed period of record. However, initial low-flow analyses 

completed for these streamgages indicated 177 active and 119 

discontinued streamgages had the recommended minimum 

10 climatic years during the periods of record.

For this study, low-flow characteristics were not 

determined for streamgages having less than 10 climatic years, 

which could be done using statistical techniques applicable to 

partial-record sites. In a similar manner, no record extension 

techniques were applied to streamgages having less than 

10 years of record because application of these techniques was 

beyond the scope of the study. Not applying record extension 

techniques resulted in a decision to exclude two discontinued 

streamgages having insufficient periods of record and located 

adjacent to or between nearby active streamgages along the 

same stream. One streamgage is located on the Yadkin River at 

Siloam in Surry County (site 248, table 1) between two active 

streamgages (sites 244 and 254) having longer periods of 

record. Flow along this reach of the Yadkin River is regulated 

by releases from the upstream W. Kerr Scott Reservoir in 

Wilkes County (fig. 1). The second streamgage is located 

on Briar Creek at Sharon Road at Charlotte in Mecklenburg 

County (site 371, table 1) immediately upstream from an 

active streamgage (site 372) that has a period of record during 

the 1996–2012 water years and basin conditions more reflective of the recent urbanization patterns observed in this area. 

Exclusion of these two discontinued streamgages resulted 

in 177 active and 117 discontinued sites having 10 or more 

climatic years of record for which low-flow characteristics 

were determined (fig. 4, fig. 5).

Following the determination of low-flow characteristics 

for the 294 streamgages, the QAQC analyses were completed 

(discussed later) to identify any factors that would preclude 

publication of low-flow characteristics. Completion of the 
Low-Flow Characteristics 19

QAQC analyses resulted in the exclusion of (1) 9 active and 

7 discontinued sites because of trends, (2) 2 discontinued 

sites (sites 18 and 32, table 1) located on the Dan River at 

Leaksville in Rockingham County and the Roanoke River 

near Scotland Neck in Halifax County because of mixed, but 

insufficient length of unregulated and regulated streamflows 

in available period of record, (3) 1 discontinued site located 

on Horsepen Creek at Battle Ground in Guilford County 

(site 156, table 1) downstream from an active streamgage 

(site 155) that has a period of record during the 1999–2012 

water years and basin conditions more reflective of the recent 

urbanization patterns observed in this area, (4) 1 discontinued 

site located on Little Sugar Creek near Charlotte in Mecklenburg County (site 376, table 1) immediately upstream from 

a wastewater treatment facility as well as a currently active 

streamgage along the same stream located downstream from 

the facility, and (5) 1 other discontinued site on the Pigeon 

River at Canton in Haywood County (site 459, table 1) where 

the period of record is already included in the discharge 

records of an active streamgage (site 458) located upstream on 

the same river. Exclusion of these 9 active and 12 discontinued 

streamgages resulted in 168 active and 105 discontinued 

sites for which low-flow characteristics were determined 

(fig. 4, fig. 5).

Further assessments of the periods of record used to 

determine low-flow characteristics also resulted in the identification of four discontinued streamgages (sites 42, 88, 211, 

and 273, table 1) for which the statistics do not reflect current 

flow conditions. The periods of record for the Tar River 

near Nashville in Nash County (site 42), Neuse River near 

Northside in Durham County (site 88), and the Yadkin River 

near Salisbury in Rowan County (site 273) reflect unregulated 

conditions, but the sites are located in reaches now inundated 

by impoundments. The period of record for the Cape Fear 

River at Fayetteville in Cumberland County (site 211) reflects 

unregulated flow conditions observed in the river in the early 

1900s, well in advance of the regulated flow conditions present since 1982 and caused by flow releases from B. Everett 

Jordan Lake (fig. 1). Daily mean discharges determined for 

the Little Tennessee River at Fontana Dam (site 504) when the 

reservoir was initially filled in early 1945 resulted in low-flow 

characteristics considered unreliable. Because of the short 

period of regulated flow conditions reflected in discharge 

records for this site, a decision was made not to publish the 

low-flow characteristics for this streamgage. Exclusion of 

these five discontinued streamgages resulted in 168 active and 

100 discontinued sites for which low-flow characteristics were 

determined (fig. 4, fig. 5).

Streamflow records for 5 pairs of active and discontinued streamgages were combined because the respective 

drainage areas for each pair of sites differ by less than 5 

percent, providing a longer period of record available for the 

determination of low-flow characteristics and flow-duration 

statistics. The streamgages for which streamflow records 

were combined are located along the Little River in Durham 

County (sites 77 and 78), the Haw River in Chatham County 

(sites 178 and 179), the Nantahala River in Swain County 

(sites 487 and 488), the Tuckasegee River in central Jackson 

County (sites 491 and 492), and the Tuckasegee River in 

northern Jackson County (sites 497 and 498). Combining the 

streamflow records for these streamgages resulted in the inclusion of 3 additional active sites that initially had insufficient 

length of record prior to the combination of records and the 

removal of 5 discontinued streamgages after the combination 

of records. This resulted in 171 active and 95 discontinued 

sites (266 sites total) for which low-flow characteristics were 

published.

The 266 sites for which low-flow characteristics were 

published included 177 unregulated, 56 regulated, and 33 sites 

either known or considered to be affected by varying degrees 

of minor regulations and (or) diversions upstream from the 

streamgages. table 1 indicates (via shading) the sites for which 

low-flow characteristics were published (table 3) and those 

sites for which low-flow characteristics were excluded from 

publication (fig. 4, fig. 5).

For the 63 streamgages for which low-flow characteristics 

have previously been published and for which no additional 

data were collected following publication (Giese and Mason, 

1993; Weaver, 1996, 1997, 1998; Weaver and Pope, 2001), 

previously published low-flow characteristics were republished in this report (table 3). For streamgages having less than 

10 years of record and for which partial-record techniques 

were applied during the previous basinwide low-flow studies, 

the low-flow characteristics were not republished in this 

report. Users may refer to the aforementioned reports (Weaver, 

1996, 1997, 1998; Weaver and Pope, 2001) to obtain the 

low-flow characteristics at those streamgages.
20 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

8 02053200 1958–2011 0.46 4.9 4.8 3.4

11 02053500 1965–2011 1.4 4.3 3.0 2.9

14 02068500 1950–83;

1985–86;

1992–2011

 43.0 82.0 64.0 69.0

16 02070500 1930–70;

1994–2011

 58.0 126.0 113.0 108.0

17 02071000 1950–2011 162.0 403.0 343.0 332.0

19 02074000 1951–2011 162.0 292.0 211.0 245.0

22 02075160 1962–73 0.4 3.0 3.0 1.5 Roanoke (Weaver, 

1996)

23 02077200 1965–2011 0 0.41 0.72 0.01

25 02077240 1965–74;

 1977–81

 0 0.6 0.6 0.5 Roanoke (Weaver, 

1996)

26 02077250 1967–77 0 2.5 1.5 1.0 Roanoke (Weaver, 

1996)

28 02077303 1974–2011 1.4 8.9 3.5 7.3

30 02077670 1984–2011 1.3 2.4 1.8 2.1

31 02080500 1964–92; 1994; 

1996–2011

 1,290.0 2,480.0 1,320.0 1,850.0

35 0208111310 1988–2011 0 0.11 0.01 0

38 02081500 1940–2011 0.16 3.4 1.2 1.5

39 02081747 1974–2011 6.7 35.0 30.0 23.0

40 02081800 1957–74 3.4 14.0 19.0 11.0 Statewide (Giese and 

Mason, 1993)

43 02082500 1950–69 0.07 1.4 0.55 0.39

45 02082506 1973–2010 38.0 106.0 44.0 90.0

46 02082585 1977–92;

1995–2011

 29.0 112.0 39.0 84.0

50 02082770 1964–92;

1996–2011

 3.6 23.0 22.0 14.0

51 02082950 1960–2011 1.4 14.0 9.1 8.6

52 02083000 1927–92; 1994; 

1996–2011

 12.0 74.0 48.0 55.0

53 02083500 1972–92; 

1996–2011

 83.0 262.0 149.0 201.0

55 02083800 1957–92; 1994; 

1996–2001

 1.9 6.3 2.7 4.4

59 02084160 1976–86; 1994; 

1996–2011

 0 0.24 0.45 0
Low-Flow Characteristics 21

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

64 02084500 1950–79 0.65 1.1 0.69 0.85

65 02084540 1966–92 0 0.36 0 0.03

67 02084557 1978–2011 0 0.18 0 0.03

74 02084909 1988–2003 0 0.29 0.13 0.1

75 02085000 1928–70;

1986–2011

 0.48 4.6 2.0 2.7

76 02085070 1964–2011 0.85 7.3 3.8 4.1

77 0208521324 1962–20111 0.03 2.3 0.79 1.0

79 0208524090 1995–2011 0 0.12 0.06 0.07

80 0208524975 1996–2011 0.64 2.2 0.78 1.6

81 02085500 1963–2011 0.23 5.5 2.2 3.1

82 02086000 1926–70; 1990 0 0.3 0.1 0.2 Neuse (Weaver, 1998)

84 0208650112 1988–89;

1995–2011

 0 0 0 0

85 02086624 1983–94;

2006–11

 1.4 3.1 2.9 2.4

89 0208700780 1983–94 0 0 0 0 Neuse (Weaver, 1998)

91 02087183 1984–2011 49.0 88.0 49.0 82.0

95 0208726005 1988–91;

1998–2011

 4.7 11.0 5.9 8.1

96 02087275 1998–2011 7.7 17.0 13.0 12.0

97 02087324 1991–2011 5.9 24.0 16.0 15.0

98 0208732534 1997–2011 0.01 0.06 0.01 0.02

100 0208732885 1984–2011 0.11 1.6 0.87 0.92

101 0208735012 1997–2011 0.02 0.37 0.15 0.14

102 02087359 1997–2011 1.1 5.7 4.6 3.2

106 02087500 1984–2011 165.0 259.0 171.0 222.0

108 02087580 2002–11 0 1.5 0.8 0.39

109 0208758850 1988–92;

1994–95;

1997–2011

 0.01 0.55 0.52 0.12

112 02088000 1940–2011 0.59 11.0 5.5 5.8

115 02088470 1965–88 1.6 13.1 12.3 8.0 Neuse (Weaver, 1998)

116 02088500 1930–2011 0.95 20.0 11.0 12.0

118 02089000 1984–91;

1995–2011

 218.0 447.0 284.0 344.0

121 0208925200 1988–2011 8.9 18.0 17.0 14.0

122 02089500 1984–94;

1996–2011

 268.0 565.0 380.0 447.0
22 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

123 02090380 1977–93;

1996–2011

 0.57 14.0 2.9 6.8

124 02090500 1930–53 0.3 17.0 2.5 9.0 Neuse (Weaver, 1998)

126 02090625 1969–86 0.3 0.5 0.3 0.4 Neuse (Weaver, 1998)

128 0209096970 1988–97 0.12 0.44 0.39 0.24

129 02091000 1954–92;

1994–2011

 2.1 11.0 10.0 7.5

130 02091500 1977–93;

1996–2011

 24.0 80.0 59.0 56.0

131 02091700 1957–86 0.1 4.0 1.3 1.7 Neuse (Weaver, 1998)

140 02091970 1971–84 0 0 0 0 Neuse (Weaver, 1998)

141 02092000 1965–88 2.1 11.2 6.2 7.5 Neuse (Weaver, 1998)

144 02092500 1951–2011 1.0 8.0 3.6 4.3

151 02093500 1929–70 7.8 34.0 31.0 23.0 Cape Fear (Weaver 

and Pope, 2001)

152 02093800 1956–2011 1.9 6.9 6.4 5.4

155 0209399200 2000–11 0.52 2.5 3.1 1.4

158 02094500 1970–2011 0.98 6.8 3.8 5.8

159 02094659 2000–11 0.14 1.1 0.69 0.36

160 02094770 1999; 2000–11 0.27 2.8 1.5 0.88

161 02094775 1999; 2000–11 0.02 0.49 0.23 0.14

162 02095000 1999; 2000–11 0.96 5.7 2.8 2.5

164 02095181 2000–11 0.05 1.6 0.86 0.61

166 02095500 1999; 2000–11 11.0 20.0 15.0 17.0

167 0209553650 1999; 2000–11 37.0 57.0 48.0 47.0

171 02096500 1973–2011 60.0 114.0 100.0 90.0

172 02096700 1958–79 1.3 9.6 7.5 5.4 Cape Fear (Weaver 

and Pope, 2001)

174 02096846 1989–2011 0 0.04 0 0.01

175 02096850 1960–72 0.1 1.9 1.6 1.1 Cape Fear (Weaver 

and Pope, 2001)

178 02096960 1929–20112 51.0 156.0 113.0 110.0

183 02097314 1983–2011 5.3 13.0 7.0 9.8

186 02097464 1989–2011 0 0.14 0.08 0.06

188 02097517 1983–2011 6.7 12.0 7.6 10.0

190 0209782609 2000–11 0 0.03 0.1 0

192 02098500 1924–25;

1929–57

 2.1 5.7 5.3 4.0 Cape Fear (Weaver 

and Pope, 2001)
Low-Flow Characteristics 23

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

193 02099000 1929–93;

1998–2011

 1.5 3.8 3.0 3.1

196 02100500 1923–2011 13.0 46.0 26.0 30.0

197 02101000 1940–70 0.4 11.9 7.4 6.2 Cape Fear (Weaver 

and Pope, 2001)

200 0210166029 1989–2011 0.03 0.33 0.36 0.21

202 02101800 1959–80;

1994–2011

 0 0.09 0.04 0.02

203 02102000 1931–2011 25.0 110.0 49.0 70.0

205 02102192 1984–2011 0.04 1.1 0.37 0.32

208 02102908 1969–2011 2.6 5.8 5.3 4.7

209 02103000 1939–49;

2003–11

 28.0 85.0 79.0 55.0

210 02103500 1929–70 47.7 121.0 109.0 84.7 Cape Fear (Weaver 

and Pope, 2001)

212 02104220 1989–2011 30.0 55.0 56.0 45.0

214 02104500 1929–30;

1939–53

 97.6 186.0 163.0 144.0 Cape Fear (Weaver 

and Pope, 2001)

218 02105900 1957–72;

1994–2009

 0.05 1.3 1.2 0.27

219 02106000 1950–90 1.1 13.5 12.7 6.4 Cape Fear (Weaver 

and Pope, 2001)

220 02106500 1952–2011 21.0 108.0 82.0 64.0

222 02107000 1952–85 2.0 24.6 17.2 15.2 Cape Fear (Weaver 

and Pope, 2001)

223 02107500 1950–70 0 3.5 1.5 1.0 Cape Fear (Weaver 

and Pope, 2001)

225 02107600 1959–74 5.0 12.2 9.5 8.9 Cape Fear (Weaver 

and Pope, 2001)

233 02108000 1941–2011 9.7 59.0 37.0 29.0

234 02108500 1956–80 1.8 7.1 6.4 4.3 Cape Fear (Weaver 

and Pope, 2001)

235 02108548 1977–91 0.03 0.4 0.06 0.1 Cape Fear (Weaver 

and Pope, 2001)

237 02109500 1940–2011 1.5 29.0 4.7 18.0

238 02111000 1940–2011 8.2 18.0 12.0 16.0

239 02111180 1966–2011 13.0 32.0 20.0 27.0

241 02111500 1940–2011 31.0 66.0 46.0 57.0

242 02112000 1963–2011 190.0 381.0 254.0 331.0

243 02112120 1964–2011 35.0 84.0 60.0 74.0
24 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

244 02112250 1964–2011 314.0 637.0 452.0 552.0

245 02112360 1964–2011 28.0 60.0 45.0 52.0

246 02112500 1921–31 25.0 68.0 46.0 52.0 Statewide (Giese and 

Mason, 1993)

247 02113000 1932–2009 29.0 72.0 59.0 60.0

251 02113850 1964–2011 48.0 129.0 107.0 108.0

253 02114450 1961–2011 3.2 11.0 12.0 8.3

254 02115360 1965–2011 487.0 1,100.0 811.0 948.0

255 02115500 1940–70 2.2 7.3 6.8 5.8 Statewide (Giese and 

Mason, 1993)

261 02115856 1972–81 14.0 25.0 20.0 20.0

262 02115860 1965–78;

1989–90;

2008–09

 52.0 94.0 71.0 79.0

264 02116500 1963–96;

1998–2011

 543.0 1,300.0 1,020.0 1,110.0

265 02117030 1969–82 0.1 0.3 0.3 0.2 Statewide (Giese and 

Mason, 1993)

266 02117500 1940–70 21.0 45.0 38.0 38.0 Statewide (Giese and 

Mason, 1993)

267 02118000 1939–96;

1998–2011

 42.0 127.0 99.0 115.0

268 02118500 1951–2011 28.0 76.0 58.0 66.0

269 02119000 1929–64 107.0 229.0 180.0 191.0

270 02119400 1956–68 0.14 2.6 2.5 2.1

271 02120500 1941–70 16.0 33.0 27.0 28.0

272 02120780 1979–2011 4.2 23.0 16.0 17.0

274 02121180 1980–89 0.98 2.4 2.7 1.9

276 02121500 1989–2011 5.1 17.0 13.0 9.7

279 02123500 1939–70 3.6 29.0 12.0 17.0

280 02123567 1982;

1986–2003

 0.04 0.4 0.32 0.2

283 0212414900 1995–2011 0.35 5.0 2.2 2.5

296 02124692 2000–11 0 0.78 0.53 0.32

298 02125000 1954–2009 0 0.36 0.18 0.09

304 02126000 1930–2011 47.0 113.0 79.0 78.0

306 02127000 1938–70 0 0.2 0 0 Statewide (Giese and 

Mason, 1993)

308 02128000 1954–2011 0.26 9.8 5.8 5.1
Low-Flow Characteristics 25

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

309 02129000 1928–2011 731.0 2,580.0 1,220.0 1,740.0

312 02132320 1988–2011 7.5 29.0 34.0 22.0

313 02133500 1940–2011 31.0 80.0 81.0 63.0

314 02133624 1988–2011 60.0 139.0 164.0 107.0

315 02134170 2001–11 67.0 152.0 177.0 110.0

316 02134480 1986–2011 0 13.0 11.0 2.7

317 02134500 1930–2010 109.0 293.0 245.0 223.0

318 02137000 1961–74 9.1 15.0 12.0 13.0

319 02137727 1981–2011 30.0 87.0 62.0 74.0

320 02138000 1942–80 66.0 146.0 90.0 125.0 Statewide (Giese and 

Mason, 1993)

321 02138500 1923–2011 17.0 40.0 28.0 31.0

324 0213903612 1992–2008 125.0 313.0 199.0 229.0

328 02140991 1986–2011 44.0 122.0 87.0 102.0

329 02141150 1967–77 9.1 16.0 16.0 13.0 Statewide (Giese and 

Mason, 1993)

333 02142000 1953–94;

1998–2011

 4.2 13.0 9.0 11.0

334 02142500 1936–61 193.0 1,040.0 353.0 474.0

336 0214253830 1984–2005 0.98 2.7 2.1 2.4

341 0214266000 1997–2011 1.4 4.4 2.5 2.7

345 02142900 1966–86;

 1988–2011

 0.42 2.0 1.5 1.5

347 0214291555 1999; 2000–11 0.29 3.5 2.6 1.2

348 0214295600 1995–2011 0.17 1.2 0.54 0.59

350 02143000 1926–30;

1942–2011

 19.0 48.0 32.0 39.0

351 02143040 1962–2011 5.1 15.0 10.0 13.0

352 02143500 1964–2011 4.1 23.0 18.0 19.0

355 02144000 1953–2011 0.92 6.5 4.4 4.6

356 02145000 1942–70;

1984–95;

1998–2011

 105.0 273.0 216.0 215.0

359 02146211 1982–93; 

1998–99; 2000; 

2005–11

 0.28 0.83 0.56 0.5

360 0214627970 2001–11 3.8 6.1 4.4 4.7

362 02146300 1963–2005; 

2007–11

 4.9 11.0 7.8 7.6
26 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

363 02146315 1999; 2000–11 0.08 0.6 0.22 0.2

364 02146348 1999; 2000–11 0.09 1.0 0.52 0.33

366 02146381 1995–2011 21.0 32.0 23.0 24.0

367 02146409 1995–2011 1.5 4.0 2.3 2.5

368 0214642825 1998–2011 0 0.7 0.09 0.06

372 0214645022 1996–2011 0.59 3.5 1.6 1.7

375 02146470 1983–89;

1995–2011

 0 0.41 0.22 0.14

378 02146507 1978–2011 19.0 30.0 23.0 24.0

379 02146530 1998–2011 22.0 33.0 25.0 26.0

380 0214655255 2000–11 0.01 0.6 0.26 0.1

381 02146562 2000–11 0 0.72 0.09 0.16

383 0214657975 2000–11 0 0.38 0.14 0.14

384 02146600 1962–2011 0.62 4.7 2.6 2.5

388 02146750 1974–2011 1.4 11.0 5.5 5.3

391 0214678175 1999; 2000–11 0.08 0.57 0.32 0.19

394 02146900 1961–2002 0.07 2.7 1.2 1.2

396 02148500 1927–57 6.6 64.0 33.0 38.0 Statewide (Giese and 

Mason, 1993)

397 02149000 1951–2011 25.0 59.0 39.0 52.0

399 02150000 1940–53 55.0 174.0 93.0 133.0 Statewide (Giese and 

Mason, 1993)

400 02150495 1999; 2000–11 10.0 33.0 28.0 26.0

401 02151000 1926–95 63.0 133.0 96.0 111.0

402 02151500 1926–2011 283.0 654.0 443.0 568.0

404 02152100 1959–2011 14.0 35.0 25.0 31.0

407 02152500 1940–70 53.0 115.0 84.0 98.0 Statewide (Giese and 

Mason, 1993)

408 02152610 1969–86 0.1 0.5 0.5 0.5 Statewide (Giese and 

Mason, 1993)

409 03161000 1925; 1929–85; 

1987–2011

 103.0 187.0 128.0 161.0

411 03162500 1909–15;

1929–57

 80.0 155.0 109.0 128.0 Statewide (Giese and 

Mason, 1993)

412 03439000 1908;

1936–2011

 52.0 92.0 63.0 79.0

413 03439500 1925–54 72.0 134.0 86.0 115.0 Statewide (Giese and 

Mason, 1993)
Low-Flow Characteristics 27

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

414 03440000 1945–54;

1987–2003

 7.0 14.0 8.7 12.0

416 03441000 1921–89;

1994–2011

 23.0 45.0 29.0 38.0

417 03441440 1963–89 15.0 34.0 23.0 27.0

418 03441500 1943–54 7.1 47.0 24.0 37.0 Statewide (Giese and 

Mason, 1993)

419 03442000 1943–54 6.4 12.0 7.7 10.0 Statewide (Giese and 

Mason, 1993)

420 03443000 1921–2011 193.0 374.0 249.0 314.0

421 03444000 1943–54 7.3 14.0 8.3 12.0 Statewide (Giese and 

Mason, 1993)

422 03444500 1926–48;

1966–72

 3.8 9.1 6.4 7.0 Statewide (Giese and 

Mason, 1993)

425 03446000 1925;

1934–2011

 29.0 61.0 38.0 51.0

427 03447000 1939–54 40.0 79.0 53.0 69.0 Statewide (Giese and 

Mason, 1993)

428 03447500 1943–57 12.0 26.0 18.0 22.0 Statewide (Giese and 

Mason, 1993)

429 03447687 2002–11 210.0 561.0 343.0 442.0

432 03448000 1935–85 378.0 689.0 468.0 590.0

433 03448500 1943–76 21.0 41.0 28.0 35.0 Statewide (Giese and 

Mason, 1993)

435 0344894205 1989–2011 2.2 7.0 4.6 5.2

437 03449000 1926–52 1.3 4.4 2.3 3.3 Statewide (Giese and 

Mason, 1993)

439 03450000 1926–74; 1980; 

1986–2011

 0.6 1.7 1.2 1.3

441 03451000 1960–2011 15.0 44.0 31.0 36.0

443 03451500 1896–2011 408.0 836.0 553.0 720.0

446 03452000 1943–54 5.2 17.0 13.0 15.0 Statewide (Giese and 

Mason, 1993)

448 03453000 1934–72;

1995–2011

 15.0 35.0 27.0 29.0

449 03453500 1943–2011 465.0 956.0 645.0 825.0

450 03454000 1934–70 26.0 48.0 31.0 40.0 Statewide (Giese and 

Mason, 1993)

451 03454500 1934–48 598.0 1,000.0 733.0 870.0

452 03455500 1954–2011 14.0 27.0 20.0 21.0
28 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

453 0345577330 1988–2011 18.0 32.0 21.0 25.0

454 03456000 1954–79 27.0 47.0 32.0 38.0 Statewide (Giese and 

Mason, 1993)

455 03456100 1981–2011 24.0 44.0 34.0 38.0

457 03456500 1954–2011 17.0 36.0 26.0 29.0

458 03456991 1933–82;

1985–2011

 51.0 89.0 62.0 75.0

460 03457500 1950–71 3.6 9.9 5.4 7.7 Statewide (Giese and 

Mason, 1993)

462 03459000 1930–71 27.0 44.0 32.0 38.0 Statewide (Giese and 

Mason, 1993)

463 03459500 1933–2011 118.0 215.0 152.0 181.0

464 03460000 1934–51;

1963–2011

 21.0 35.0 24.0 31.0

466 03460795 1997–2011 116.0 273.0 145.0 163.0

467 03462000 1939–56 34.0 63.0 43.0 52.0 Statewide (Giese and 

Mason, 1993)

469 03463300 1958–2011 14.0 36.0 25.0 29.0

470 03463500 1934–51 26.0 51.0 3

35.0 40.0 Statewide (Giese and 

Mason, 1993)

471 03464000 1934–70 40.0 78.0 52.0 63.0 Statewide (Giese and 

Mason, 1993)

472 03464500 1926–54 178.0 341.0 229.0 278.0

473 03479000 1940–2011 19.0 43.0 29.0 34.0

475 03481000 1935–54 9.1 20.0 13.0 17.0 Statewide (Giese and 

Mason, 1993)

476 03500000 1944–2011 71.0 133.0 94.0 114.0

477 03500240 1962–2011 25.0 48.0 34.0 42.0

478 03500500 1932–66 2.4 16.0 5.4 11.0 Statewide (Giese and 

Mason, 1993)

480 03501000 1927–66 37.0 71.0 45.0 60.0 Statewide (Giese and 

Mason, 1993)

482 03502000 1930–44 170.0 264.0 183.0 236.0

484 03503000 1945–80;

1984–2011

 191.0 368.0 255.0 316.0

486 03504000 1941–2011 38.0 68.0 47.0 57.0

488 03505550 1943–80;

2005–114

 34.0 184.0 61.0 58.0

489 03506500 1913–16;

1921–42

 101.0 164.0 119.0 143.0 Statewide (Giese and 

Mason, 1993)
Low-Flow Characteristics 29

Table 3. Magnitude and frequency of low-flow characteristics at U.S. Geological Survey continuous-record streamgaging stations in 

North Carolina.—Continued

[USGS, U.S. Geological Survey; ft3/s, cubic foot per second; 7Q10, 7-day, 10-year low flow; 30Q2, 30-day, 2-year low flow; Winter 7Q10, winter 7-day, 

10-year low flow; 7Q2, 7-day, 2-year low flow. Climatic year is the annual period from April 1 through March 31 that is used by the USGS for low-flow 

analyses at USGS continuous-record streamgages, designated by the year in which the period begins. Source refers to the previous basinwide low-flow report 

in which low-flow characteristics were republished in the current report. A previous report is cited only if no new data have been collected at the streamgage 

since the report was published]

Site

index

number

(figs. 4, 5)

USGS

station

number

Period of

analysis

(climatic

years)

Low-flow characteristic,

in ft3

/s Source

7Q10 30Q2 Winter

7Q10 7Q2

490 03507000 1913–43 339.0 579.0 419.0 498.0

492 03508050 1935–75;

2005–115

 49.0 160.0 77.0 101.0

495 03509000 1942–74;

1993–94

 27.0 45.0 30.0 38.0

496 03509500 1928–40 24.0 40.0 26.0 36.0 Statewide (Giese and 

Mason, 1993)

498 03510577 1934–80;

2005–116

 179.0 351.0 217.0 282.0

499 03511000 1921–48 72.0 117.0 83.0 103.0 Statewide (Giese and 

Mason, 1993)

500 03512000 1949–2011 96.0 170.0 111.0 140.0

501 03513000 1942–80;

1984–93;

1996–2011

 363.0 630.0 421.0 522.0

502 03513500 1936–70 6.4 13.0 7.6 10.0 Statewide (Giese and 

Mason, 1993)

509 03546000 1942–44;

1947–54

 13.0 24.0 17.0 21.0 Statewide (Giese and 

Mason, 1993)

513 03548500 1942–2003 98.0 290.0 125.0 183.0

514 03550000 1905–08;

1914–16;

1919–2011

 29.0 61.0 39.0 51.0

515 03554000 1901–04;

1914–16;

1919–28;

1932–40

 41.0 175.0 46.0 150.0 Statewide (Giese and 

Mason, 1993)

1The period of analysis was based on combined daily mean discharges at station 02085220 (site 78, 1962–87 water years) and station 0208521324 

(site 77, active streamgage since October 1987).

2The period of analysis was based on combined daily mean discharges at station 02096960 (site 178, active streamgage since October 1973) and 

station 02097000 (site 179, 1928–73 water years).

3The W7Q10 discharge previously published (Giese and Mason, 1993) for site 470 was incorrectly listed.

4The period of analysis was based on combined daily mean discharges at station 03505500 (site 487, 1942–81 water years) and station 03505550

(site 488, active streamgage since December 2004).

5The period of analysis was based on combined daily mean discharges at station 03508000 (site 491, 1934–76 water years) and station 03508050

(site 492, active streamgage since September 2004).

6The period of analysis was based on combined daily mean discharges at station 03510500 (site 497, 1933–81 water years) and station 03510577

 (site 498, active streamgage since July 2004).
30 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Comparison of 7Q10 Discharges for 1998 and 2011 

Climatic Years 

Provisional low-flow analyses completed in North Carolina 

as a part of responding to site-specific low-flow requests have 

shown that low-flow characteristics have declined at numerous 

streamgages across the State because of recent droughts since the 

late 1990s (Weaver, 2005). Weaver (2005) compiled daily mean 

discharges for 211 streamgages operated during the 2002 water 

year. Of these 211 streamgages, 150 had periods of record that 

exceeded 10 years, and records of lowest daily mean discharge 

were set at 65 sites during the 1998–2002 drought (55 sites during the 2002 water year alone). Severe drought conditions also 

affected much of North Carolina from late 2007 into 2008 when 

the weekly U.S. Drought Monitor depicted nearly 90 percent 

of the State having combined extreme (D3) and exceptional 

(D4) drought conditions during the period (National Drought 

Mitigation Center, 2014). Because low-flow characteristics are 

used by State agencies tasked with managing both water quantity 

and quality, concerns have arisen about the potential effects these 

declines will have on ability of water users to maintain existing 

water withdrawals and point-source discharges in the future.

The updated 7Q10 discharges were compared for 63 

streamgages across North Carolina for which (1) long-term 

streamflow record consisted of 30 or more climatic years 

of data available as of the 1998 climatic year, and (2) 

streamflows were not known to be regulated (table 4, fig. 9). 

The 63 streamgages consisted of 53 where streamflows are 

unregulated and 10 where streamflows are affected by varying 

degrees of minor regulations and (or) diversions upstream 

from the streamgages. Percentage changes were computed 

by comparing the 7Q10 discharge for the 2011 climatic year 

relative to the 1998 climatic year, just prior to the start of the 

droughts in the late 1990s (Weaver, 2005). For example, the 

7Q10 discharge declined 31.1 percent at South Yadkin River 

near Mocksville (site 267, fig. 4) between the 1998 and 2011 

climatic years (table 4., fig. 9).

Of the 63 streamgages compared, 7Q10 discharges did 

not change at 3 sites (sites 23, 321, and 452), increased at 

5 sites, and decreased at 55 sites (table 4., fig. 9). Positive 

changes (increases) ranged from 4.3 percent (site 362) 

to 34.1 percent (site 112) with a median of 13.2 percent. 

Negative percentage changes (decreases) ranged from 

–3.3 percent (site 514) to –80.0 percent (site 308) with a 

median of –22.2 percent. The median percentage change for 

all 63 streamgages was –18.4 percent.

Where positive changes were determined (sites 76, 112, 

304, 362, and 387; table 4; fig. 9), part of the increases were 

probably due to changes in diversions upstream from the 

streamgage as well as upstream development that could affect 

runoff characteristics during periods of low flow. However, 

7Q10 discharge did not increase at all streamgages included 

in the comparisons and located downstream of a diversion or 

increased basin development. Still, these five streamgages are 

located in basins affected in part by upstream diversions and 

(or) recent development. 

The 29 streamgages where the negative change exceeded 

the median of –22.2 percent were distributed throughout 

all parts of the State except the southern mountains. The 

14 streamgages where the change exceeded –40.0 percent 

were distributed along a band extending from the southwest 

Piedmont toward the northern Coastal Plain. These observations are consistent with historical U.S. Drought Monitor 

depictions showing most of North Carolina affected by both 

the 1998–2002 and 2007–08 droughts.
Low-Flow Characteristics 31

Table 4. Differences between 7Q10 discharges determined for periods of record available through the 1998 and 2011 climatic years 

at U.S. Geological Survey continuous-record streamgaging stations in North Carolina with 30 or more climatic years as of the 1998 

climatic year.—Continued

[USGS, U.S. Geological Survey; 7Q10, 7-day, 10-year low flow; ft3/s, cubic foot per second]

Site index

number

(figs. 4, 5)

USGS

station

number

Period of record through

1998 climatic year

Period of record through

2011 climatic year Percent difference 

from previous to 

current estimate 7Q10,

in ft3

/s

Number of

climatic years

7Q10,

in ft3/s

Number of

climatic years

8 02053200 1.1 41 0.46 54 –58.2

11 02053500 1.5 34 1.4 47 –6.7

16 02070500 66.0 46 58.0 59 –12.1

23 02077200 0 34 0 47 No change

38 02081500 0.27 59 0.16 72 –40.7

50 02082770 4.7 32 3.6 45 –23.4

51 02082950 2.6 39 1.4 52 –46.2

52 02083000 20.0 70 12.0 83 –40.0

75 02085000 0.52 56 0.48 69 –7.7

76 02085070 0.76 35 0.86 48 13.2

77 0208521324 0.09 37 0.03 50 –66.7

81 02085500 0.82 36 0.23 49 –72.0

112 02088000 0.44 59 0.59 72 34.1

116 02088500 2.4 69 0.95 82 –60.4

129 02091000 2.7 44 2.1 57 –22.2

144 02092500 1.4 48 1.0 61 –28.6

152 02093800 3.4 43 1.9 56 –44.1

193 02099000 2.0 66 1.5 79 –25.0

208 02102908 3.8 30 2.6 43 –31.6

220 02106500 27.0 47 21.0 60 –22.2

233 02108000 12.0 58 9.7 71 –19.2

237 02109500 2.2 59 1.5 72 –31.8

238 02111000 9.3 59 8.2 72 –11.8

239 02111180 18.0 33 13.0 46 –27.8

241 02111500 38.0 59 31.0 72 –18.4

243 02112120 52.0 35 35.0 48 –32.7

245 02112360 36.0 35 28.0 48 –22.2

251 02113850 59.0 35 48.0 48 –18.6

253 02114450 3.9 38 3.2 51 –17.9

267 02118000 61.0 59 42.0 72 –31.1

268 02118500 37.0 48 28.0 61 –24.3

304 02126000 45.0 69 47.0 82 4.4
32 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Table 4. Differences between 7Q10 discharges determined for periods of record available through the 1998 and 2011 climatic years 

at U.S. Geological Survey continuous-record streamgaging stations in North Carolina with 30 or more climatic years as of the 1998 

climatic year.—Continued

[USGS, U.S. Geological Survey; 7Q10, 7-day, 10-year low flow; ft3/s, cubic foot per second]

Site index

number

(figs. 4, 5)

USGS

station

number

Period of record through

1998 climatic year

Period of record through

2011 climatic year Percent difference 

from previous to 

current estimate 7Q10,

in ft3

/s

Number of

climatic years

7Q10,

in ft3/s

Number of

climatic years

308 02128000 1.3 45 0.26 58 –80.0

313 02133500 35.0 59 31.0 72 –11.4

321 02138500 17.0 76 17.0 89 No change

333 02142000 6.1 43 4.2 56 –31.1

345 02142900 0.73 32 0.42 45 –42.5

350 02143000 23.0 62 19.0 75 –17.4

351 02143040 9.0 37 5.1 50 –43.3

352 02143500 9.3 35 4.1 48 –55.9

355 02144000 2.0 46 0.92 59 –54.0

362 02146300 4.7 36 4.9 48 4.3

384 02146600 1.1 37 0.62 50 –43.6

387 02146700 0.04 37 0.05 50 25.0

397 02149000 34.0 48 25.0 61 –26.5

404 02152100 21.0 40 14.0 53 –33.3

409 03161000 108.0 70 103.0 83 –4.6

412 03439000 55.0 64 52.0 77 –5.5

416 03441000 24.0 74 23.0 87 –4.2

425 03446000 31.0 66 29.0 79 –6.5

439 03450000 0.63 63 0.6 76 –4.8

443 03451500 448.0 103 408.0 116 –8.9

449 03453500 534.0 56 465.0 69 –12.9

452 03455500 14.0 45 14.0 58 No change

457 03456500 19.0 45 17.0 58 –10.5

464 03460000 22.0 54 21.0 67 –4.5

469 03463300 17.0 41 14.0 54 –17.6

473 03479000 20.0 59 19.0 72 –5.0

476 03500000 82.0 55 71.0 68 –13.4

477 03500240 30.0 37 25.0 50 –16.7

486 03504000 40.0 58 38.0 71 –5.0

500 03512000 102.0 50 96.0 63 –5.9

514 03550000 30.0 87 29.0 100 –3.3
Low-Flow Characteristics 33

Percent change

EXPLANATION

"

"

"

"

25 to 49.9 percent increase10 to 24.9 percent increaseLess than 5 percent increaseNo changeLess than 5 percent decrease

5 to 9.9 percent decrease

10 to 24.9 percent decrease25 to 49.9 percent decrease50 to 99.9 percent decreaseSite number

76° 77° 78° 79° 80° 81° 82° 83° 84°

36°35°34°

ATLANTIC OCEAN

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SOUTH CAROLINA

GEORGIA

VIRGINIA KENTUCKY

TENNESSEE

Base modified from digital files of:U.S. Geological Survey, 1:100,000 scale 

0 100 MILES 500 100 KILOMETERS 50

514

350

75

77

16

362

384 387

390

304

308

152

193

345

355

352

253

251

245

268

267

243

241

239

333

238

351

321

404 397

409

473

469

439

425

457 443 452

449

416

412

464

500

476

477

486

Greensboro

Charlotte

Asheville Raleigh

237

144 233

220

8

14

208

313

129

116 112

51

52

50

38 81

23

76

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Figure 9. Differences between 7Q10 discharges determined for periods of record available through the 1998 and 2011 climatic years at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina with 30 or more climatic years as of the 1998 climatic year.
34 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Access to Updated Low-Flow Characteristics 

Through StreamStats Application

Dissemination of streamflow data and statistics in a 

manner available to all users is critical for maintaining an 

informative database that can be used to manage the quantity 

and quality of streams and rivers. Changes in both computer 

infrastructure and software since the mid-1990s have 

resulted in opportunities to maintain and provide streamflow 

statistics in a more user-friendly and readily accessible 

format than previously available. The recent release 

of a USGS StreamStats application for North Carolina 

(http://water.usgs.gov/osw/streamstats/north_carolina.html) 

has provided one such opportunity for improved access 

to streamflow statistics, allowing users to access such 

information through a Web-based mapping application.

All low-flow characteristics for the streamgages 

were added into StreamStatsDB, which is a database 

accessible to users through the StreamStats application. The 

StreamStatsDB contains selected basin characteristics and 

streamflow information for USGS streamgage locations in 

North Carolina and can be accessed through the Gaging 

Station Information tool provided in the StreamStats 

application (fig. 10).

Figure 10. Screenshots of U.S. Geological Survey StreamStats application showing location of Gaging Station Information tool and 

sample pop-up window with streamgage attributes where updated streamflow statistics can be accessed.
Flow-Duration Statistics 35

Flow-Duration Statistics

For streamgages having sufficient record, the determination of minimum, mean, maximum, and flow-duration statistics of daily mean discharges for annual, seasonal, monthly, 

and calendar day periods provides a set of baseline statistics 

to evaluate historical and current streamflow conditions and 

to assess streamflow trends. Flow-duration statistics form the 

basis of the streamflow information presented in the online 

USGS WaterWatch pages (http://waterwatch.usgs.gov/). A 

summary and brief description of the flow-duration statistics 

compiled in this study are provided in table 2. 

Computational Procedures for Flow-Duration 

Statistics

Flow-duration statistics are discharges associated with a 

percentile, which is a value on a scale of 1 to 100 indicating 

the percentage of a sample distribution that is equal to, greater 

than, or less than the discharge during a given time period. 

Flow-duration statistics are a summary of past hydrologic 

events. If a streamgage has a sufficiently long period of record, 

then the flow-duration statistics can be used as an indicator of 

probable future conditions (Searcy, 1959).

Although flow-duration statistics are commonly 

presented as exceedance percentiles (Searcy, 1959), flowduration statistics may also be presented in the context of 

non-exceedance percentiles, which are used in the depiction 

of streamflow conditions provided on the USGS WaterWatch 

pages (http://waterwatch.usgs.gov/). Flow-duration 

statistics presented for non-exceedance percentiles are the 

discharges at or below which the percentage of the record 

has been observed. If an exceedance percentile is known, 

the non-exceedance percentile can quickly be determined by 

subtraction from 1. For example, the flow-duration statistic for 

the 25th exceedance percentile is the discharge value that was 

equaled or exceeded 25 percent of the time during the period 

of analysis. This is equivalent to the flow-duration statistic for 

the 75th non-exceedance percentile, which is the discharge 

value that was equaled or not met 75 percent of the time 

during the period of analysis. For this report, the flow-duration 

statistics are presented as non-exceedance percentiles (or 

simply as XXth percentiles as listed in table 5 back of report).

Flow-durations statistics are computed by sorting the 

daily mean discharges for categorical periods (such as the 

entire period of record, a given month, or a selected calendar 

day) from the largest value to the smallest value and assigning 

each streamflow value a rank, starting with a rank of 1 for 

the largest value. The frequencies of exceedance are then 

computed using the Weibull formula for computing plotting 

position (Helsel and Hirsch, 2002):

 P = 100 * [M / (n+1)], (2)

where

P is the probability that a given streamflow will be

 equaled or exceeded (percentage of time),

M is the ranked position (dimensionless), and

n is the number of observations for the period

 of record (dimensionless).

Examining an example flow-duration curve for the 

streamgage at Elk Creek at Elkville in Wilkes County (site 

239, fig. 4), the flow-duration statistic for the 90th exceedance 

percentile is 26.0 ft3

/s based on the period of record at the 

streamgage (fig. 11). Daily mean discharges were 26.0 ft3

/s or 

higher 90 percent of the time during the available period of 

record (1966–2012 water years) analyzed for this streamgage 

in this study. But presented in the context of a non-exceedance 

percentile, 10 percent of the historical observations in the 

sample were at or below 26.0 ft3

/s during the period of record. 

In other words, the discharge value for the 90th exceedance 

percentile is also the same as the 10th non-exceedance 

percentile. An example of the application of non-exceedance 

percentiles is shown in a duration hydrograph available from 

the USGS WaterWatch pages (http://waterwatch.usgs.gov/

index.php?id=wwchart_sitedur, fig. 12). The hydrograph 

shows recent daily mean discharges observed at Elk Creek 

(site 239, fig. 4) plotted against a background of the percentiles determined for each calendar day based on the historical 

streamflow recorded for each day.

The flow-duration statistics compiled in this study were 

computed using the same internal Perl routine used to handle 

manipulation of daily mean discharges at the streamgages and 

to compute the low-flow characteristics. The methods from 

Searcy (1959) described above were coded into the internal 

Perl routine to compute the non-exceedance percentiles.
36 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

0.50.2 1.0 2 5 10 20 30 50 70 80 90 95 98 99.5 99 99.2

Streamflow, in cubic feet per second

Exceedance percentile

The 10th percentile (non-exceedance) is 26.0 cubic feet

per second (see table 5)

1

0.1

0.01

10

100

1,000

10,000

100,000

Figure 11. Flow-duration curve of daily mean discharge for 1966–2012 water years at Elk Creek at 

Elkville in Wilkes County, North Carolina (site 239, fig. 4).
Flow-Duration Statistics 37

Figure 12. Duration hydrograph of daily mean discharge observed during the 2013–14 calendar 

years at Elk Creek at Elkville in Wilkes County, North Carolina (site 239, fig. 4), plotted against a 

background of non-exceedance percentiles based on historical streamflow records.
38 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

Compilation of Streamflow Statistics

Streamflow statistics determined as part of this compilation to allow ecological evaluations of streams include 

minimum, mean, maximum, and flow-duration statistics of 

daily mean discharges for categorical periods. For the same 

group of streamgages used to update low-flow characteristics, 

the streamflow statistics were compiled using streamflow 

records available through the 2012 water year. Flow-duration 

statistics based on the daily mean discharge records were 

compiled in this study for the 5th, 10th, 25th, 50th, 75th, 90th 

and 95th percentiles.

The categorical periods used in the compilation of these 

streamflow statistics include the (1) available period of record 

(or selected period if flows were regulated) consisting of all 

complete water years of record, (2) each complete water year 

of record, (3) selected seasonal periods of complete record, 

as discussed below, (4) each complete month of the calendar 

year, and (5) each calendar day of the year. The streamflow 

statistics based on the entire period of available (or selected 

if regulated) record are presented only for the streamgages in 

table 5. 

Six seasonal periods were selected as a part of this study 

and are named and specified as follows: Summer_USGS, 

lasting from April through October; Winter_USGS, from 

November through March; Spring_ECO(logical), from April 

through June; Summer_ECO(logical), from July through 

September; Fall_ECO(logical), October and November; and 

Winter_ECO(logical), from December through March. Of 

these periods, the 2 USGS “seasons” are the most consistent 

with the periods used in the compilation of low-flow characteristics in North Carolina, whereas the 4 ecological (ECO) 

“seasons” are based on those used as part of the ecological 

evaluations completed by the EF–SAB (North Carolina 

Ecological Flows Science Advisory Board, 2013). 

In addition to the streamflow statistics compiled for 

each complete water year of record, the number of days the 

daily mean discharge was at or below the 10th percentile was 

summed as well as the number of events during the water year. 

An event is defined as one or more consecutive days the daily 

mean discharge(s) were at or below the 10th percentile. After 

the number of events were determined for a given water year, 

the duration (in days) of the longest event was identified for 

that water year.

Access to Streamflow Statistics Through the 

StreamStats Application

The volume of flow-duration statistics compiled across 

the various categorical periods was substantial and precluded 

the convenience of including the tables for each streamgage 

in this report. The minimum, mean, maximum, and flowduration statistics of daily mean discharges based on the 

available period of record (table 5) were updated in the North 

Carolina StreamStatsDB for inclusion in the pop-up results 

window that presents selected site attributes and streamflow 

statistics for each of the streamgages. However, for selected 

seasonal, monthly, calendar day, and annual water year periods 

(figs. 13, fig. 14), tab-delimited American Standard Code for 

Information Interchange (ASCII) tables of the streamflow 

statistics are available online to users through the link 

provided near the top of the pop-up results window generated 

through use of the Gaging Station Information tool (fig. 10).
Flow-Duration Statistics 39 Figure 13. Excerpt of sample table with minimum, mean, maximum, and flow-duration statistics of daily mean discharges for each calendar day and selected categorical periods at Elk Creek at Elkville in Wilkes County, North Carolina (site 239, fig. 4).

Site

number

Statistics

begin date

Statistics

end date

Number

of values

Min date

Cal/yr Month Mean Day

Full

water years

summary

0211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180

10/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/1965

9/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/2012

1966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–2012

11111111111111111111

123456789

1011121314151617181920

4747474747474747474747474747474747474747

111

98.185.191.584.680.393.1

123100

85.3

91

99.391.3

146136

97.188.893.8

112103

Min

1414141414131313131313131313131313131920

200120012001

20012001200120012001200120012001200120012001200120012001200119811981

2625252420242522232321232224232220223129

3030353330303131323132343130292930303835

4943494845515957545248465049484745445650

7170778280777574767578747169737068718284

101

98

108106

98

100

96

101

9797

108118116115116110110106116119

257190165149147148163226209184199213210273215167147200198190

431300191248177170203436288200218345254458230259314291271282

953737209406303203677

1,330

741276321440325

2,2102,330

693402437

1,100

500

20071979200719821993199320091998197819781991201219751995199519951995200619961979

Percentile

5th

Percentile

10th

Percentile

25th

Percentile

75th

Percentile

50th (Median)

Min date

CalYr

Percentile

90th

Percentile

95th Max

02111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180021111800211118002111180

10/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/196510/1/1965

9/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/20129/30/2012

1966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–20121966–2012

121212121212121212121212

123456789

101112

POR

Summer_USGS

Winter_USGS

Spring_Eco

Summer_Eco

Fall_Eco

Winter_Eco

202122232425262728293031

NANANANANANANANANANANANANANANANANANANA

474747474747474747474747

1,4571,3281,4571,4101,4571,4101,4571,4571,4101,4571,4101,457

17,16710,058

7,1094,2774,3242,8675,699

69

72.881.895.8

106106108

90.482.680.176.195.4

103111140134104

94.767.373.765.268.485.790.694.686.5

106111

68.776.9

111

19191717161615151514141413192727211511

5.5

7

101314

5.55.5

1315

5.5

1013

200720002000200020002000200020002000200020002000

1/6/20012/1/19813/3/2001

4/30/20015/30/20026/21/20027/22/20088/24/20089/13/200210/3/200711/1/2000

12/29/2000

8/24/20088/24/2008

1/6/2001

6/21/20028/24/200810/3/2007

1/6/2001

21202024252420242425242726314646332219141816192321192429171828

26252628292929293129292833405152402725192020222826243038212136

32394038475041404549484651586766564434292726324241364955302855

65637173767675737678757376869695806852454043547466587781464782

888593

103121113107102112107

9898

113123148138117102

7468666688

105104

94

116122

7077

120

119114149194173207172140130128118151181174240219177161112116116106145148165152181187114128189

163152233383419350441255200169156352236240361313241227168181176158219209234219256260176189267

181422449417864747953638268187195634

2,3302,7202,2802,0503,0402,0601,0705,8902,9502,7104,4001,1605,8905,8904,4003,0405,8904,4002,720

199219732006200619862009197319731973197319691969

1/15/19952/13/19663/17/19734/14/19805/28/19736/15/1969

7/2/2003

8/17/1994

9/8/2004

10/12/1990

11/6/1977

12/12/1983

8/17/19948/17/199411/6/19775/28/1973

8/17/199411/6/19772/13/1966
40 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations 02111180 Site number Statistics begin date Statistics end date Full water years summary Percentile 5th Percentile 10th Percentile 25th Percentile 75th Percentile 50th (Median) Days at or below 10th percentile Events at or below 10th percentile Max event duration Water year Statistic No values Mean Min Min date CalYr Min date CalYr 10/1/1965 9/30/1966 1966–2012 1966 Daily discharge 365 02111180 10/1/1966 9/30/1967 1966–2012 1967 Daily discharge 365 02111180 10/1/1967 9/30/1968 1966–2012 1968 Daily discharge 366 02111180 10/1/1968 9/30/1969 1966–2012 1969 Daily discharge 365 02111180 10/1/1969 9/30/1970 1966–2012 1970 Daily discharge 365 02111180 10/1/1970 9/30/1971 1966–2012 1971 Daily discharge 365 02111180 10/1/1971 9/30/1972 1966–2012 1972 Daily discharge 366 02111180 10/1/1972 9/30/1973 1966–2012 1973 Daily discharge 365 02111180 10/1/1973 9/30/1974 1966–2012 1974 Daily discharge 365 02111180 10/1/1974 9/30/1975 1966–2012 1975 Daily discharge 365 02111180 10/1/1975 9/30/1976 1966–2012 1976 Daily discharge 366 02111180 10/1/1976 9/30/1977 1966–2012 1977 Daily discharge 365 02111180 10/1/1977 9/30/1978 1966–2012 1978 Daily discharge 365 02111180 10/1/1978 9/30/1979 1966–2012 1979 Daily discharge 365 02111180 10/1/1979 9/30/1980 1966–2012 1980 Daily discharge 366 02111180 10/1/1980 9/30/1981 1966–2012 1981 Daily discharge 365 02111180 10/1/1981 9/30/1982 1966–2012 1982 Daily discharge 365 02111180 10/1/1982 9/30/1983 1966–2012 1983 Daily discharge 365 02111180 10/1/1983 9/30/1984 1966–2012 1984 Daily discharge 366 02111180 10/1/1984 9/30/1985 1966–2012 1985 Daily discharge 365 02111180 10/1/1985 9/30/1986 1966–2012 1986 Daily discharge 365 02111180 10/1/1986 9/30/1987 1966–2012 1987 Daily discharge 365 02111180 10/1/1987 9/30/1988 1966–2012 1988 Daily discharge 366 02111180 10/1/1988 9/30/1989 1966–2012 1989 Daily discharge 365 02111180 10/1/1989 9/30/1990 1966–2012 1990 Daily discharge 365 02111180 10/1/1990 9/30/1991 1966–2012 1991 Daily discharge 365 02111180 10/1/1991 9/30/1992 1966–2012 1992 Daily discharge 366 02111180 10/1/1992 9/30/1993 1966–2012 1993 Daily discharge 365 02111180 10/1/1993 9/30/1994 1966–2012 1994 Daily discharge 365 02111180 10/1/1994 9/30/1995 1966–2012 1995 Daily discharge 365 02111180 10/1/1995 9/30/1996 1966–2012 1996 Daily discharge 366 02111180 10/1/1996 9/30/1997 1966–2012 1997 Daily discharge 365 02111180 10/1/1997 9/30/1998 1966–2012 1998 Daily discharge 365 02111180 10/1/1998 9/30/1999 1966–2012 1999 Daily discharge 365 02111180 10/1/1999 9/30/2000 1966–2012 2000 Daily discharge 366 02111180 10/1/2000 9/30/2001 1966–2012 2001 Daily discharge 365 02111180 10/1/2001 9/30/2002 1966–2012 2002 Daily discharge 365 02111180 10/1/2002 9/30/2003 1966–2012 2003 Daily discharge 365 02111180 10/1/2003 9/30/2004 1966–2012 2004 Daily discharge 366 02111180 10/1/2004 9/30/2005 1966–2012 2005 Daily discharge 365 02111180 10/1/2005 9/30/2006 1966–2012 2006 Daily discharge 365 02111180 10/1/2006 9/30/2007 1966–2012 2007 Daily discharge 365 02111180 10/1/2007 9/30/2008 1966–2012 2008 Daily discharge 366 02111180 10/1/2008 9/30/2009 1966–2012 2009 Daily discharge 365 02111180 10/1/2009 9/30/2010 1966–2012 2010 Daily discharge 365 02111180 10/1/2010 9/30/2011 1966–2012 2011 Daily discharge 365 02111180 10/1/2010 9/30/2011 1966–2012 2012 Daily discharge 366 84.59726027 22 7/28/1966 8/17/1967 9/30/1968 10/1/1968 7/18/1970 9/7/1971 9/21/1972 10/16/1972 11/19/1973 11/8/1974 9/9/1976 9/4/1977 9/29/1978 10/23/1978 9/15/1980 8/27/1981 10/1/1981 10/4/1982 10/3/1983 1/21/1985 7/20/1986 10/9/1986 7/18/1988 10/13/1988 7/8/1990 9/29/1991 10/1/1991 9/14/1993 10/29/1993 9/8/1995 7/30/1996 9/21/1997 9/14/1998 8/19/1999 8/29/2000 10/14/2000 9/13/2002 10/8/2002 8/8/2004 30 32 38 53 78 69.72054795 22 27 33 47 62 80 72.35245902 18 22 27 42 60 86 99.11506849 17 34 40 50 72 96 101.5260274 23 31 42 55 75 100 93.55616438 35 42 46 58 70 101 116.6174863 29 36 47 68 91 117 153.9945205 32 36 49 70 106 169 139.2 42 47 56 81 113 150 122.8958904 42 47 52 65 87 124 103.3469945 27 32 40 57 79 101 105.5561644 28 35 42 53 72 100 123.5287671 29 37 41 54 87 123 132.6 24 25 26 51 87 134 131.2868852 24 29 34 66 92 136 46.59452055 14 17 20 26 33 49 68.01643836 15 15 19 35 58 75 131.2164384 25 32 35 52 97 151 114.057377 25 33 42 68 91 131 54.67945205 22 28 30 35 45 58 62.83013699 17 21 24 28 49 66 105.1315068 18 24 32 47 76 112 43.6557377 12 14 16 23 39 53 80.5369863 18 19 22 28 51 82 133.7890411 37 44 49 70 98 144 133.4739726 26 31 37 67 97 141 87.96174863 26 28 30 40 57 86 136.2657534 23 28 32 51 104 162 118.7726027 21 24 24 41 69 112 120.9561644 33 42 48 58 82 144 108.7978142 32 42 47 55 72 103 102.5616438 24 36 47 60 81 120 108.890411 19 23 26 32 62 118 51.36986301 17 19 21 24 40 68 50.13934426 14 16 20 26 40 58 35.65479452 12 13 14 18 26 39 39.14246575 7 10 14 18 25 48 157.290411 21 38 53 75 120 179 104.0355191 26 33 42 60 71 99 110.8027397 33 9/22/2005 8/28/2006 9/10/2007 8/24/2008 10/23/2008 9/24/2010 9/2/2011 8/29/2012 43 59 78 94 118 67.78630137 20 23 28 38 55 80 66.14712329 9.7 12 16 26 48 70 41.58251366 5.5 8.9 11 18 29 47 81.35342466 20 24 28 37 52 86 102.8465753 17 24 28 43 76 114 61.89589041 16 19 20 26 36 64 69.01912568 22 25 27 35 Percentile 90th Percentile 95th Max 50 71 136 218 2,720 2/13/1966 10/19/1966 3/12/1968 6/15/1969 8/9/1970 10/30/1970 6/21/1972 5/28/1973 4/4/1974 3/14/1975 10/17/1975 3/13/1977 11/6/1977 3/4/1979 4/14/1980 5/27/1981 2/3/1982 2/2/1983 12/12/1983 8/17/1985 11/4/1985 3/1/1987 4/4/1988 9/22/1989 11/16/1989 10/12/1990 4/21/1992 3/23/1993 8/17/1994 1/15/1995 8/12/1996 12/1/1996 1/8/1998 1/24/1999 3/20/2000 3/30/2001 9/27/2002 7/2/2003 9/8/2004 3/28/2005 11/29/2005 1/1/2007 8/27/2008 5/27/2009 1/25/2010 4/16/2011 12/7/2011 50 10 110 136 324 40 7 128 158 516 37 4 163 239 2,060 37 8 138 211 2,100 37 5 150 213 820 38 11 170 300 1,930 37 3 247 322 3,040 37 4 209 300 1,870 36 2 212 323 1,920 39 8 151 235 1,120 40 5 147 210 1,840 39 10 183 297 4,400 39 9 237 414 1,770 37 3 226 324 2,050 37 5 76 109 713 48 9 107 157 1,160 39 2 242 341 1,640 39 7 181 232 1,160 42 5 79 100 798 38 9 109 158 948 56 14 181 289 1,590 38 4 74 89 379 38 11 164 252 1,060 37 7 215 278 2,610 38 5 221 315 2,710 37 3 149 219 1,690 47 7 243 354 1,420 37 11 194 303 5,890 39 8 185 241 2,330 40 8 164 219 3,140 45 14 170 245 950 37 5 221 325 1,330 37 6 91 111 499 49 11 87 117 461 43 7 60 98 401 53 3 74 91 586 42 6 277 454 1,070 37 5 146 230 2,950 40 10 166 238 687 887 37 5 112 149 657 41 8 117 182 953 41 6 75 108 956 40 7 147 208 1,460 41 8 184 293 1,520 38 7 94 111 146 132 1,330 44 9 46 9 131518122411 212122221613103117242510171313151315101614

7

10

11

9

12

1211

18

22161512

28

12131213131411

Figure 14. Sample table with minimum, mean, maximum, and flow-duration statistics of daily mean discharges for each complete water year of record at Elk Creek at Elkville in Wilkes County, North Carolina (site 239, fig. 4).
Summary and Conclusions 41

Summary and Conclusions

In 2013, the U.S. Geological Survey, in cooperation 

with the North Carolina Division of Water Resources, 

compiled updated low-flow characteristics and flow-duration 

statistics at selected continuous-record streamgages in 

North Carolina. The compilation of updated streamflow 

statistics provides regulators and planners with relevant 

hydrologic information reflective of the recent droughts, 

which can be used to better manage the quantity and quality 

of water in streams in North Carolina. Where sufficient 

discharge records were available at streamgages, application 

of statistical techniques formed the basis for determining 

low-flow characteristics and other streamflow statistics.

A quality assurance and quality control (QAQC) 

analysis was completed for the annual minimum 7- and 

30-day, winter minimum 7-day average streamflow data 

for the streamgages that had a minimum of 10 years of 

record. The data at each streamgage were reviewed for 

homogeneity, which implies relatively stable basin and 

(or) climatic conditions during the period of record. The 

Kendall’s tau test was used to assess the homogeneity of 

the record at each streamgage. The annual minimum 7- and 

30-day, winter minimum 7-day average streamflow data for 

all streamgages were tested for trends by using the Kendall 

tau test. Among the 76 sites where potential trends were 

detected, the indication of a trend at 60 streamgages was 

probably due to the period of record ending in a drought 

period, particularly those sites with records through the 2012 

water year. Because the examination of trend and other plots 

resulted in a conclusion that the trends were attributed to the 

period of record ending during a drought period, a decision 

was made to publish the low-flow characteristics for those 

streamgages. For 16 of the 76 sites, examination of the plots 

resulted in a decision to refrain from publishing the low-flow 

characteristics.

Available streamflow records through the 2012 water 

year were used to determine the updated low-flow characteristics. Consequently, streamflow records available through 

March 31, 2012 (or the 2011 climatic year) were used to 

determine the updated low-flow characteristics. Of the 516 

streamgages considered for this study, 224 remain active 

(as of the 2012 water year) and 292 have been discontinued. 

The presence of documented tidal effects resulted in the 

exclusion of 4 active and 15 discontinued streamgages from 

further analyses. Among the remaining 220 active and 277 

discontinued sites, 180 and 139 sites, respectively, had 10 

or more years of observed period of record. Initial analyses 

completed for these streamgages indicated 177 active and 

119 discontinued streamgages had 10 or more climatic years 

recommended for completion of low-flow analyses. Exclusion of two additional discontinued streamgages (due to be 

located very close to other active stations) resulted in 177 

active and 117 discontinued sites having 10 or more climatic 

years record where low-flow characteristics were determined.

Completion of the QAQC analyses resulted in the 

exclusion of (1) 16 sites because of trends, (2) 2 discontinued 

sites because of mixed, but insufficient length of unregulated 

and regulated streamflows in available period of record, (3) 1 

discontinued site downstream from an active streamgage that 

has more recent period of record and basin conditions more 

reflective of the recent urbanization patterns observed in this 

area, and (4) 1 other discontinued site located immediately 

upstream from a wastewater treatment facility as well as a 

currently active streamgage along the same stream located 

downstream from the facility, and (5) 1 other discontinued 

site where the period of record is already included in the 

discharge records of an active streamgage located upstream 

on the same river. Further considerations of the periods 

of record used to determine low-flow characteristics 

also resulted in the identification of four discontinued 

streamgages where the statistics do not reflect current 

flow conditions. Daily mean discharges determined for 

another discontinued streamgage in western North Carolina 

downstream of an impoundment initially filled in early 1945 

resulted in low-flow characteristics considered unreliable, 

and a decision was made not to publish the low-flow 

characteristics for this streamgage. Streamflow records 

for 5 pairs of active and discontinued streamgages were 

combined because the respective drainage areas for each 

pair of sites differ by less than 5 percent, providing a longer 

period of record available for the determination of low-flow 

characteristics and flow-duration statistics.

The removal of these 5 sites and combining discharge 

records at the 5 pairs of active and discontinued sites resulted 

in 171 active and 95 discontinued sites (266 sites total) for 

which low-flow characteristics were published. Low-flow 

characteristics were published for 177 unregulated sites, 

56 regulated sites, and 33 sites known or considered to be 

affected by varying degrees of minor regulations and (or) 

diversions upstream from the streamgages. 

The updated 7Q10 discharges were compared for 63 

streamgages across North Carolina where (1) long-term 

streamflow record consisted of 30 or more climatic years 

of data available as of the 1998 climatic year, and (2) 

streamflows were not known to be regulated. Percentage 

changes were computed by comparing the 7Q10 discharge 

for the 2011 climatic year relative to the 1998 climatic year 

just prior to start of the droughts in the late 1990s. Among 

the 63 streamgages, the 7Q10 discharges did not change 

for 3 sites whereas increases and decreases were noted at 

5 and 55 sites, respectively. Positive changes (increases) 

ranged from 4.3 percent (site 362) to 34.1 percent (site 112) 

with a median of 13.2 percent. Negative percentage 

changes (decreases) ranged from –3.3 percent (site 514) to 

–80.0 percent (site 308) with a median of –22.2 percent. 

The median percentage change for all 63 streamgages was 

–18.4 percent.

Flow characteristics determined as a part of this 

compilation and typically used for ecological evaluations 

of streams include minimum, mean, maximum, and 
42 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations

flow-duration statistics of daily mean discharges for 

categorical periods. For the same group of streamgages 

used to update low-flow characteristics, the streamflow 

statistics were compiled using streamflow records available 

through the 2012 water year (ending September 30, 2012). 

Flow-duration statistics based on the daily mean discharge 

records were compiled in this study for the 5th, 10th, 25th, 

50th, 75th, 90th, and 95th percentiles. Flow-durations statistics 

were determined for each complete water year of record at a 

streamgage, the available period of record (or selected period 

if flow were regulated), selected seasonal, monthly, and 

calendar day periods. In addition to the streamflow statistics 

compiled for each of the water years, the number of days 

the daily mean discharge was at or below the 10th percentile 

was summed for each year as well as the number of multiday 

events during each water year.

All low-flow characteristics for the streamgages were 

added into the StreamStatsDB, which is a database accessible 

to users through the USGS StreamStats application for North 

Carolina. The StreamStatsDB contains selected basin characteristics and streamflow information for streamgage locations 

in North Carolina and can be accessed through the Gaging 

Station Information tool provided in the StreamStats application. The volume of flow-duration statistics compiled across 

the various categorical periods was substantial and precluded 

the convenience of including the tables for each streamgage in 

this report. The minimum, mean, maximum, and flow-duration 

statistics of daily mean discharges based on the available 

period of record were updated in the NC StreamStatsDB. 

However, for the selected seasonal, monthly, calendar day, and 

annual water year periods, tab-delimited American Standard 

Code for Information Interchange (ASCII) tables of the 

streamflow statistics are available online to users through the 

link provided near the top of the pop-up window generated 

through use of the Gaging Station Information tool.

References Cited

Bales, J.D., Chapman, M.J., Oblinger, C.J., and 

Robbins, J.C., 2004, North Carolina District Science 

Plan: U.S. Geological Survey Open-File Report 

2004–1025, 31 p., accessed September 9, 2011, at 

http://nc.water.usgs.gov/reports/ofr041025/pdf/report.pdf.

Barbie, D.L., and Wehmeyer, L.L., 2012, Trends in selected 

streamflow statistics at 19 long-term streamflowgaging stations indicative of outflows from Texas to 

Arkansas, Louisiana, Galveston Bay, and the Gulf of 

Mexico, 1922–2009: U.S. Geological Survey Scientific 

Investigations Report 2012–5182, 20 p. Revised 

September 2012, accessed December 11, 2014, at 

http://pubs.usgs.gov/sir/2012/5182/.

City of Greensboro, North Carolina [n.d.], History 

of water reclamation in Greensboro: City of 

Greensboro Web page, accessed on March 20, 2014, at 

http://www.greensboro-nc.gov/index.aspx?page=2311

Evett, J.B., 1994, Effects of urbanization and land-use changes 

on low stream flow: Raleigh, The University of North 

Carolina Water Resources Research Institute Report 284, 

146 p.

Giese, G.L., and Mason, R.R., Jr., 1993, Low-flow characteristics of streams in North Carolina: U.S. Geological Survey 

Water-Supply Paper 2403, 29 p. + 2 pl. (Also available at 

http://pubs.er.usgs.gov/publication/wsp2403.)

Goddard, G.C., Jr., 1963, Water-supply characteristics of 

North Carolina streams: U.S. Geological Survey WaterSupply Paper 1761, 223 p.

Feaster, T.D., and Guimaraes, W.B., 2009, Low-flow 

frequency and flow duration of selected South Carolina 

streams in the Pee Dee River Basin through March 2007: 

U.S. Geological Survey Open-File Report 2009–1171, 42 p. 

(Also available at http://pubs.usgs.gov/of/2009/1171/.)

Feaster, T.D., and Guimaraes, W.B., 2012, Low-flow 

frequency and flow duration of selected South Carolina 

streams in the Saluda, Congaree, and Edisto River 

Basins through March 2009: U.S. Geological Survey 

Open-File Report 2012–1253, 53 p. (Also available at 

http://pubs.usgs.gov/of/2012/1253/.)

Guimaraes, W.B., and Feaster, T.D., 2010, Low-flow 

frequency and flow duration of selected South Carolina 

streams in the Broad River Basin through March 2008: U.S. 

Geological Survey Open-File Report 2010–1305, 47 p. 

(Also available at http://pubs.usgs.gov/of/2010/1305/.)

Helsel, D.R., and Hirsch, R.M., 2002, Statistical methods 

in water resources: U.S. Geological Survey Techniques 

of Water-Resources Investigations book 4, chap. A3. 

(Available at http://pubs.usgs.gov/twri/twri4a3.)

Lins, H.F., Hirsch, R.M., and Kiang, Julie, 2010, Water—The 

Nation’s fundamental climate issue—A white paper on 

the U.S. Geological Survey role and capabilities: U.S. 

Geological Survey Circular 1347, 9 p. (Also available at 

http://pubs.usgs.gov/circ/1347.)

National Drought Mitigation Center, 2014, 

Tabular Data Archive (for North Carolina): Accessed 

July 24, 2014, at http://droughtmonitor.unl.edu/

MapsAndData/DataTables.aspx.

North Carolina Department Environment and 

Natural Resources, 2014, River basin interactive 

map: Office of Environmental Education and Public 

Affairs Web page, accessed on April 8, 2014, at 

http://www.eenorthcarolina.org/riverbasins-interactive.html
References Cited 43

North Carolina Department Environment and Natural 

Resources [n.d.], NPDES guidance: Division of Water 

Resources Web page, accessed on December 10, 2014, at 

http://portal.ncdenr.org/web/wq/swp/ps/npdes/guidance.

North Carolina Ecological Flows Science Advisory Board, 

2013, Recommendations for estimating flows to maintain 

ecological integrity in streams and rivers in North Carolina, 

submitted to the North Carolina Department of Environment and Natural Resources November 2013: p. 19 of app. 

D (Also available at http://www.ncwater.org/files/eflows/

sab/EFSAB_Final_Report_to_NCDENR.pdf.)

North Carolina General Assembly, 2009, An act to direct 

the Department of Environment and Natural Resources to 

develop basinwide hydrologic models, as recommended by 

the Environmental Review Commission: North Carolina 

General Assembly House Bill 1743, Section 2 (4), 3 p., 

accessed December 10, 2014, at http://www.ncleg.net/

Sessions/2009/Bills/House/PDF/H1743v6.pdf.

Riggs, H.C., 1972, Low-flow investigations: U.S. Geological 

Survey Techniques of Water-Resources Investigations, book 

4, chap. B1, 15 p.

Searcy, J.K., 1959, Flow-duration curves, manual of 

hydrology—Part 2. Low-flow techniques: U.S. Geological 

Survey Water-Supply Paper 1542–A, 33 p.

Stedinger, J.R., and Thomas, W.O., Jr., 1985, Low-flow 

frequency estimation using base-flow measurements: U.S. 

Geological Survey Open-File Report 85–95, 22 p. (Also 

available at http://pubs.er.usgs.gov/publication/ofr8595.)

U.S. Environmental Protection Agency, 2012, Flow 

alteration in urban streams: Accessed July 16, 2014, at 

http://www.epa.gov/caddis/ssr_urb_hyd1.html.

U.S. Geological Survey, 2001, USGS water programs 

in North Carolina—2001: U.S. Geological Survey 

Fact Sheet FS–046–01, accessed August 15, 2003, at 

http://water.usgs.gov/pubs/FS/FS-046-01/.

U.S. Geological Survey, 2007, Facing tomorrow’s 

challenges—U.S. Geological Survey science in the decade 

2007–2017: U.S. Geological Survey Circular 1309, x + 

70 p.

U.S. Geological Survey, 2009, National Streamflow Information Program (NSIP): Accessed August 20, 2014, at 

http://water.usgs.gov/nsip/history1.html.

U.S. Geological Survey, 2011, Cooperative Water Program 

– High priority issues addressed by data collection and 

interpretive science—FY 12: Accessed on May 31, 2012, 

at http://water.usgs.gov/coop/about/CWP.science.priorities.

FY12.pdf.

Weaver, J.C., 1996, Low-flow characteristics and profiles 

for selected streams in the Roanoke River Basin, North 

Carolina: U.S. Geological Survey Water-Resources 

Investigations Report 96–4154, 56 p. (Also available at 

http://pubs.er.usgs.gov/publication/wri964154.)

Weaver, J.C., 1997, Low-flow characteristics and profiles 

for the Deep River in Cape Fear River Basin, North 

Carolina: U.S. Geological Survey Water-Resources 

Investigations Report 97–4128, 31 p. (Also available at 

http://pubs.er.usgs.gov/publication/wri974128.)

Weaver, J.C., 1998, Low-flow characteristics and discharge 

profiles for selected streams in the Neuse River Basin, 

North Carolina: U.S. Geological Survey Water-Resources 

Investigations Report 98–4135, 101 p. (Also available at 

http://pubs.er.usgs.gov/publication/wri984135.)

Weaver, J.C., 2005, The drought of 1998–2002 in North 

Carolina—Precipitation and hydrologic conditions: 

U.S. Geological Survey Scientific Investigations 

Report 2005–5053, 88 p. (Also available at 

http://pubs.usgs.gov/sir/2005/5053/.)

Weaver, J.C., and Fine, J.M., 2003, Low-flow 

characteristics and profiles for the Rocky River in the 

Yadkin-Pee Dee River Basin, North Carolina, through 

2002: U.S. Geological Survey Water-Resources 

Investigations Report 03–4147, 47 p. (Also available at 

http://pubs.usgs.gov/wri/wri034147/.)

Weaver, J.C., and Pope, B.F., 2001, Low-flow characteristics and discharge profiles for selected streams in 

the Cape Fear River Basin, North Carolina, through 

1998: U.S. Geological Survey Water-Resources 

Investigations Report 01–4094, 140 p. (Also available at 

http://nc.water.usgs.gov/reports/wri014094/.)

Yonts, W.L., 1971, Low-flow measurements of North Carolina 

streams: Raleigh, North Carolina Department of Water and 

Air Resources, 236 p.

Zalants, M.G., 1991, Low-flow frequency and flow 

duration for selected South Carolina streams through 

1987: U.S. Geological Survey Water-Resources 

Investigations Report 91–4170, 87 p. (Also available at 

http://pubs.er.usgs.gov/publication/wri914170.)

Glossary 45

Glossary

base flow The contribution of flow to a stream from ground 

water or spring discharge.

climatic year The annual period from April 1 through 

March 31 that is used by the USGS for low-flow analyses 

at USGS continuous-record streamgages. The climatic year 

is designated by the year in which the period begins. For 

example, the 2011 climatic year is from April 1, 2011, through 

March 31, 2012. The year begins and ends during the period 

of increased streamflow so that all streamflow during a single 

dry season are included in annual values for that year.

drainage area The drainage area of a stream at a specified 

location is the area, measured in a horizontal plane, which is 

enclosed by a drainage divide.

gage height The water-surface elevation referenced to an 

arbitrary gage datum, often used interchangeably with the term 

“stage.”

low flow Base flow or sustained fair-weather flow 

(see base flow).

recurrence interval The average interval of time in which 

the magnitude of an extreme event can be expected to be 

equaled or exceeded once (floods) or the average interval of 

time during which a flow value will be less than the indicated 

value over the N-day period at least once (low flow). The 

primary recurrence intervals for low-flow statistics used in 

this report are 2 years and 10 years. For example, if the 7-day, 

10-year low-flow discharge is 5 cubic feet per second (ft3

/s), 

the annual minimum average streamflow for a 7-consecutiveday period would be 5 ft3

/s or lower, on average, 1 time in 10 

years, 5 times in 50 years, or 10 times in 100 years. Expressed 

in terms of probability, there is a 10-percent probability 

(inverse of recurrence interval) that the streamflow will be less 

than or equal to the 7-day, 10-year low-flow discharge in any 1 

year. In a similar manner, there is a 50-percent probability that 

the streamflow will be less than or equal to the 7-day, 2-year 

low-flow discharge in any 1 year. While recurrence intervals 

indicate the average frequency of occurrence for a particular 

hydrologic event, it should be noted that an event of any 

defined recurrence interval could occur more than once in a 

given year, in consecutive years, or not at all during the period 

specified by the recurrence interval. 

streamgage A site on a stream where continuous records of 

gage height are collected and for which discharge records are 

computed.

unit flow Value of streamflow expressed in units of volume 

per time per square mile of drainage area. In this report, 

unit flow (sometimes used interchangeably with the term 

“yield”) is expressed as cubic feet per second per square mile 

[(ft3/s)/mi2].

water year The annual period from October 1 through 

September 30 that is used by the USGS for the collection 

and processing of streamflow records. The water year is 

designated by the year in which the period ends. For example, 

the 2012 water year is from October 1, 2011, through 

September 30, 2012.

Tables 1 and 5
48 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

1 020431201 Albemarle and Chesapeake Canal near 

Princess Anne, VA

36°43'04" 76°06'02" NAD 27 Virginia Beach Indeterminate Tidally affected Discontinued: 2006–07

2 020432001 West Neck Creek at Indian River Road at 

Pungo, VA

36°43'16" 76°02'03" NAD 27 Virginia Beach Indeterminate Tidally affected Discontinued: 1998–99

3 020432701 North Landing River near Creeks, VA 36°36'58" 76°02'57" NAD 83 Virginia Beach Indeterminate Tidally affected Discontinued: 2006–074 02043410 Northwest River above Mouth near 

Moyock, NC

36°30'44" 76°05'12" NAD 83 Currituck 196 Tidally affected Discontinued: 2006–07

5 02043415 Tull Creek at SR 1222 near Currituck, NC 36°29'47" 76°05'03" NAD 83 Currituck 52.0 Tidally affected Discontinued: 2006–07

6 0204343500 Intracoastal Waterway at Coinjock, NC 36°20'34" 75°57'15" NAD 27 Currituck Indeterminate Tidally affected Discontinued: 1964–73

7 0204382800 Pasquotank River near South Mills, NC 36°25'17" 76°20'33" NAD 83 Camden 64.0 Tidally affected Active: October 1995 to September 2012

8 02053200 Potecasi Creek near Union, NC 36°22'15" 77°01'32" NAD 83 Hertford 225 Unregulated Active: March 1958 to September 2012

9 02053400 Ahoskie Creek near Rich Square, NC 36°14'52" 77°14'12" NAD 27 Northampton 3.86 Unregulated Discontinued: 1964–73

10 02053450 Ahoskie Creek at Mintons Store, NC 36°16'52" 77°09'56" NAD 27 Northampton 24.0 Unregulated Discontinued: 1964–73

11 02053500 Ahoskie Creek at Ahoskie, NC 36°16'49" 76°59'58" NAD 83 Hertford 63.3 Unregulated Active: January 1950 to September 2012

12 02053510 Ahoskie Creek tributary at Poortown, NC 36°16'29" 77°00'38" NAD 27 Hertford 2.04 Unregulated Discontinued: 1963–73

13 02068000 Dan River near Asbury, NC 36°32'35" 80°24'42" NAD 27 Stokes 71.4 Unregulated Discontinued: 1924–26

14 02068500 Dan River near Francisco, NC 36°30'54" 80°18'11" NAD 83 Stokes 129 Regulated Active: August 1924 to September 1987; 

December 1991 to September 2012

15 02069000 Dan River at Pine Hall, NC 36°19'09" 80°03'01" NAD 27 Stokes 501 Regulated Active: October 1923 to March 1926;

April 1986 to October 1990; December 2008 to September 2012

16 02070500 Mayo River near Price, NC 36°32'02" 79°59'29" NAD 83 Rockingham 242 Unregulated Active: July 1929 to September 1971; 

October 1993 to September 2012

17 02071000 Dan River near Wentworth, NC 36°24'45" 79°49'34" NAD 83 Rockingham 1,053 Regulated Active: October 1939 to September 2012

18 02071500 Dan River at Leaksville, NC 36°29'00" 79°46'00" NAD 27 Rockingham 1,150 Unregulated Discontinued: 1929–49

19 02074000 Smith River near Eden, NC 36°31'32" 79°45'56" NAD 83 Rockingham 538 Regulated Active: October 1939 to September 2012

20 02074218 Dan River near Mayfield, NC 36°32'29" 79°36'21" NAD 27 Rockingham 1,778 Regulated Discontinued: 1976–84

21 0207428225 Wolf Island Creek below SR 1998 at Reidsville, NC 36°22'26" 79°41'01" NAD 83 Rockingham 3.75 Unregulated Discontinued: 2003–05

22 02075160 Moon Creek near Yanceyville, NC 36°28'13" 79°23'05" NAD 27 Caswell 32.8 Unregulated Discontinued: 1961–74; 1988–89

23 02077200 Hyco Creek near Leasburg, NC 36°23'52" 79°11'48" NAD 83 Caswell 45.9 Unregulated Active: July 1964 to September 2012
Table 1 49

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

24 02077230 South Hyco Creek near Hesters Store, NC 36°21'06" 79°08'29" NAD 27 Person 29.9 Unregulated Discontinued: 1964–67

25 02077240 Double Creek near Roseville, NC 36°21'44" 79°05'48" NAD 27 Person 7.47 Unregulated Discontinued: 1964–75; 1977–82

26 02077250 South Hyco Creek near Roseville, NC 36°23'09" 79°06'26" NAD 27 Person 56.5 Unregulated Discontinued: 1966–80

27 02077300 Hyco River at McGehees Mill, NC 36°31'02" 79°01'42" NAD 27 Person 191 Regulated Discontinued: 1964–73

28 02077303 Hyco River below Afterbay Dam near 

McGehees Mill, NC

36°31'21" 78°59'51" NAD 83 Person 202 Regulated Active: October 1973 to September 2012

29 02077660 Mayo Creek near Woodsdale, NC 36°31'48" 78°52'42" NAD 27 Person 52.7 Unregulated Discontinued: 1975–77

30 02077670 Mayo Creek near Bethel Hill, NC 36°32'27" 78°52'19" NAD 83 Person 53.5 Regulated Active: August 1977 to September 2012

31 02080500 Roanoke River at Roanoke Rapids, NC 36°27'36" 77°38'01" NAD 83 Halifax 8,384 Regulated Active: December 1911 to September 2012

32 02081000 Roanoke River near Scotland Neck, NC 36°12'33" 77°23'02" NAD 83 Halifax 8,671 Regulated Discontinued: 1940–56

33 02081022 Roanoke River near Oak City, NC 36°00'49" 77°12'55" NAD 83 Martin 8,810 Regulated Discontinued: 2006–07

34 02081054 Roanoke River near Williamston, NC 35°51'35" 77°02'25" NAD 83 Martin 9,070 Regulated Discontinued: 2006–07

35 0208111310 Cashie River at Secondary Road 1257 near 

Windsor, NC

36°02'52" 76°59'03" NAD 83 Bertie 108 Unregulated Active: January 1987 to September 2012

36 02081133 Cashie River above Sans Souci Ferry near 

Sans Souci, NC

35°55'39" 76°50'42" NAD 83 Bertie 287 Tidally affected Discontinued: 2007

37 0208113400 Cashie River at Sans Souci Ferry, NC 35°54'43" 76°49'03" NAD 83 Bertie 293 Tidally affected Discontinued: 2006–07

38 02081500 Tar River near Tar River, NC 36°11'39" 78°34'59" NAD 83 Granville 167 Unregulated Active: October 1939 to September 2012

39 02081747 Tar River at U.S. 401 at Louisburg, NC 36°05'35" 78°17'46" NAD 83 Franklin 427 Unregulated Active: October 1963 to September 2012

40 02081800 Cedar Creek near Louisburg, NC 36°03'14" 78°20'24" NAD 27 Franklin 47.8 Unregulated Discontinued: 1956–75

41 02081942 Tar River at NC 581 near Spring Hope, NC 35°52'55" 78°05'22" NAD 83 Nash 671 Unregulated Active: April 2012 to September 2012

42 02082000 Tar River near Nashville, NC 35°50'57" 77°55'51" NAD 27 Nash 701 Unregulated Discontinued: 1928–71

43 02082500 Sapony Creek near Nashville, NC 35°53'10" 77°54'40" NAD 27 Nash 64.8 Unregulated Discontinued: 1950–70

44 0208250410 Tar River below dam near Langley Crossroads, NC 35°53'59" 77°53'04" NAD 27 Nash 775 Regulated Active: August 2011 to September 2012

45 02082506 Tar River below Tar River Reservoir near 

Rocky Mount, NC

35°54'02" 77°51'56" NAD 83 Nash 777 Regulated Active: August 1972 to September 2012

46 02082585 Tar River at NC 97 at Rocky Mount, NC 35°57'17" 77°47'14" NAD 83 Edgecombe 925 Regulated Active: August 1976 to September 2012

47 02082610 Tar River near Rocky Mount, NC 35°58'38" 77°45'35" NAD 27 Edgecombe 930 Unregulated Discontinued: 1971–73

48 0208273070 Devils Cradle Creek at NC 39 near 

Kearney, NC

36°12'47" 78°17'49" NAD 27 Franklin 2.89 Unregulated Discontinued: 1984–85
50 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 49 02082731 Devils Cradle Creek near Alert, NC 36°12'03" 78°14'19" NAD 27 Franklin 13.4 Unregulated Discontinued: 1993–97 50 02082770 Swift Creek at Hilliardston, NC 36°06'44" 77°55'12" NAD 83 Nash 166 Unregulated Active: July 1963 to September 2012 51 02082950 Little Fishing Creek near White Oak, NC 36°11'00" 77°52'34" NAD 83 Halifax 177 Unregulated Active: October 1959 to September 2012 52 02083000 Fishing Creek near Enfield, NC 36°09'02" 77°41'35" NAD 83 Edgecombe 526 (2) Active: October 1923 to September 2012 53 02083500 Tar River at Tarboro, NC 35°53'40" 77°31'59" NAD 83 Edgecombe 2,183 Regulated Active: July 1896 to December 1900; October 1931 to September 2012 54 0208378372 Conetoe Creek at Conetoe, NC 35°48'30" 77°26'48" NAD 27 Edgecombe 65.4 Unregulated Discontinued: 2002–03 55 02083800 Conetoe Creek near Bethel, NC 35°46'33" 77°27'45" NAD 27 Pitt 78.1 Unregulated Discontinued: 1956–2002 56 02083833 Pete Mitchell Swamp at Sr1409 near Penny Hill, NC 35°45'59" 77°29'35" NAD 83 Pitt 18.0 Unregulated Discontinued: 1993–97 57 02084000 Tar River at Greenville, NC 35°37'00" 77°22'22" NAD 83 Pitt 2,660 Tidally affected Active: May 1997 to September 2012 58 02084070 Green Mill Run at Arlington Boulevard at Greenville, NC 35°35'27" 77°22'44" NAD 83 Pitt 9.10 Unregulated Discontinued: 1980–85 59 02084160 Chicod Creek at Secondary Road 1760 near Simpson, NC 35°33'42" 77°13'51" NAD 83 Pitt 45.0 Unregulated Active: October 1975 to March 1987; May 1992 to September 2012 60 02084164 Juniper Branch near Simpson, NC 35°33'55" 77°14'43" NAD 27 Pitt 7.50 Unregulated Discontinued: 1975–86 61 0208423100 Flat Swamp at SR 1157 near Robersonville, NC 35°46'54" 77°15'26" NAD 27 Martin 21.3 Unregulated Discontinued: 1986–88 62 02084317 Black Swamp near Batts Crossroads, NC 35°42'32" 77°05'53" NAD 27 Beaufort 1.02 Unregulated Discontinued: 1982 63 02084472 Pamlico River at Washington, NC 35°32'36" 77°03'43" NAD 83 Beaufort 3,200 Tidally affected Discontinued: 1999–2008 64 02084500 Herring Run near Washington, NC 35°34'03" 77°01'09" NAD 27 Beaufort 9.59 Unregulated Discontinued: 1950–80 65 02084540 Durham Creek near Edwards, NC 35°19'26" 76°52'27" NAD 83 Beaufort 26.0 Unregulated Discontinued: 1950–2004 66 02084556 North Lake Canal above Pungo Lake near Wenona, NC 35°43'35" 76°31'01" NAD 27 Washington 0.29 Unregulated Discontinued: 1976–80 67 02084557 Van Swamp near Hoke, NC 35°43'51" 76°44'46" NAD 83 Washington 23.0 Unregulated Active: May 1977 to September 2012 68 02084558 Albemarle Canal near Swindell, NC 35°38'15" 76°40'42" NAD 83 Beaufort 74.7 Tidally affected Discontinued: 1977–81 69 0208463120 Outflow Ditch from Jennett Sedge at Buxton, NC 35°15'42" 75°34'31" NAD 27 Dare Indeterminate Tidally affected Discontinued: 1994–95

70 02084903 Sevenmile Creek tributary at SR 1120 near 

Buckhorn, NC

36°02'59" 79°11'16" NAD 27 Orange 1.34 Unregulated Discontinued: 1981–82

71 02084904 Sevenmile Creek tributary at I-85 near 

Miles, NC

36°04'39" 79°12'37" NAD 27 Orange 0.14 Unregulated Discontinued: 1981–82
Table 1 51

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

72 02084905 Sevenmile Creek tributary at SR 1144 near 

Miles, NC

36°04'11" 79°12'07" NAD 27 Orange 1.57 Unregulated Discontinued: 1981–82

73 02084908 Sevenmile Creek tributary at I-85 near 

Efland, NC

36°04'18" 79°09'38" NAD 27 Orange 0.29 Unregulated Discontinued: 1981–82

74 02084909 Sevenmile Creek near Efland, NC 36°03'56" 79°08'39" NAD 83 Orange 14.1 Unregulated Discontinued: 1987–2004

75 02085000 Eno River at Hillsborough, NC 36°04'16" 79°05'44" NAD 83 Orange 66.0 (2) Active: October 1927 to August 1971; 

October 1985 to September 2012

76 02085070 Eno River near Durham, NC 36°04'20" 78°54'28" NAD 83 Durham 141 (2) Active: August 1963 to September 2012

77 0208521324 Little River at Secondary Road 1461 near 

Orange Factory, NC

36°08'30" 78°55'09" NAD 83 Durham 78.2 Unregulated Active: October 1987 to September 2012

78 02085220 Little River near Orange Factory, NC 36°08'20" 78°54'24" NAD 27 Durham 80.4 Unregulated Discontinued: 1962–87

79 0208524090 Mountain Creek at Secondary Road 1617 

near Bahama, NC

36°08'59" 78°53'48" NAD 83 Durham 7.97 Unregulated Active: October 1994 to September 2012

80 0208524975 Little River below Little River tributary at 

Fairntosh, NC

36°06'48" 78°51'35" NAD 83 Durham 98.9 Regulated Active: October 1995 to September 2012

81 02085500 Flat River at Bahama, NC 36°10'58" 78°52'44" NAD 83 Durham 149 Unregulated Active: July 1925 to September 2012

82 02086000 Dial Creek near Bahama, NC 36°10'36" 78°51'24" NAD 27 Durham 4.73 Unregulated Discontinued: 1925–71; 1989–91

83 02086500 Flat River at Dam near Bahama, NC 36°08'55" 78°49'44" NAD 83 Durham 168 Regulated Active: September 1927 to September 

1959; August 1961 to September 1966; October 1982 to September 1990; October 1992 to September 1993; current to September 2012

84 0208650112 Flat River tributary near Willardville, NC 36°07'55" 78°50'00" NAD 83 Durham 1.14 Unregulated Active: March 1988 to September 1990; 

October 1994 to September 2012

85 02086624 Knap of Reeds Creek near Butner, NC 36°07'40" 78°47'55" NAD 27 Granville 43.0 (2) Active: October 1982 to September 1995; 

February 2006 to September 2012

86 0208675010 Ellerbee Creek at Club Boulevard at Durham, NC 36°01'09" 78°53'41" NAD 83 Durham 6.01 Unregulated Active: August 2008 to September 2012

87 02086849 Ellerbee Creek near Gorman, NC 36°03'33" 78°49'58" NAD 27 Durham 21.9 (2) Active: October 1982 to April 1989; 

October 1991 to September 1995; January 2006 to September 2012

88 02087000 Neuse River near Northside, NC 36°02'54" 78°44'59" NAD 27 Durham 535 Unregulated Discontinued: 1927–80
52 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 89 0208700780 Little Lick Creek above Secondary Road 1814 near Oak Grove, NC 35°59'11" 78°47'58" NAD 27 Durham 10.1 Unregulated Discontinued: 1982–95 90 0208705200 Smith Creek at Grissom, NC 36°05'18" 78°36'08" NAD 27 Granville 6.23 Unregulated Discontinued: 1984–85 91 02087183 Neuse River near Falls, NC 35°56'24" 78°34'51" NAD 83 Wake 771 Regulated Active: July 1970 to September 2012 92 02087190 Neuse River near Neuse, NC 35°54'32" 78°33'18" NAD 27 Wake 792 (2) Discontinued: 1969–71 93 0208721055 Perry Creek at SR 2012 near Millbrook, NC 35°52'30" 78°35'48" NAD 27 Wake 2.43 Unregulated Discontinued: 1986–89 94 0208721290 Perry Creek tributary at Neuse, NC 35°53'47" 78°34'46" NAD 27 Wake 1.07 Unregulated Discontinued: 1985–89 95 0208726005 Crabtree Creek at Ebeneezer Church Road near Raleigh, NC 35°50'43" 78°43'28" NAD 83 Wake 76.0 Regulated Active: December 1987 to September 1992; May 1997 to September 2012 96 02087275 Crabtree Creek at U.S. Highway 70 near Raleigh, NC 35°50'17" 78°40'27" NAD 83 Wake 97.6 Regulated Active: June 1997 to September 2012 97 02087324 Crabtree Creek at U.S. Highway 1 at Raleigh, NC 35°48'40" 78°36'39" NAD 83 Wake 121 Regulated Active: July 1990 to September 2012 98 0208732534 Pigeon House Creek near Cameron Village at Raleigh, NC 35°47'15" 78°39'17" NAD 83 Wake 0.29 Unregulated Active: October 1996 to September 2012 99 0208732810 Marsh Creek at SR 2030 at Millbrook, NC 35°51'13" 78°36'12" NAD 27 Wake 1.44 Unregulated Discontinued: 1986–89 100 0208732885 Marsh Creek near New Hope, NC 35°49'01" 78°35'35" NAD 83 Wake 6.84 Unregulated Active: January 1984 to September 2012 101 0208735012 Rocky Branch below Pullen Park at Ra- leigh, NC 35°46'48" 78°39'59" NAD 83 Wake 1.17 Unregulated Active: October 1996 to September 2012 102 02087359 Walnut Creek at Sunnybrooke Drive at Raleigh, NC 35°45'30" 78°34'59" NAD 83 Wake 29.8 Unregulated Active: May 1996 to September 2012 103 0208739674 Neuse River Trib at North Raleigh WWTP (CMP Site) near Auburn, NC 35°43'18" 78°30'08" NAD 83 Wake 2.24 Unregulated Discontinued: 2007–08 104 0208739678 Neuse River Trib at North Raleigh WWTP, (Central Site) near Auburn, NC 35°43'25" 78°29'34" NAD 83 Wake 0.23 Unregulated Discontinued: 2007–08 105 0208741400 Neuse River Trib at North Raleigh WWTP, (Eastern Site) near Auburn, NC 35°42'43" 78°29'12" NAD 83 Wake 0.52 Unregulated Discontinued: 2007–08 106 02087500 Neuse River near Clayton, NC 35°38'50" 78°24'19" NAD 83 Johnston 1,150 Regulated Active: July 1927 to September 2012

107 02087570 Neuse River at Smithfield, NC 35°30'45" 78°20'58" NAD 83 Johnston 1,206 Unregulated Discontinued: 1959–90

108 02087580 Swift Creek near Apex, NC 35°43'08" 78°45'08" NAD 83 Wake 21.0 Unregulated Active: March 2002 to September 2012

109 0208758850 Swift Creek near McCullar’s Crossroads, NC 35°41'37" 78°41'32" NAD 83 Wake 35.8 Regulated Active: December 1987 to September 2012
Table 1 53

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

110 0208762750 Unnamed trib to Swift Creek near Yates 

Mill Pond, NC

35°43'55" 78°40'34" NAD 83 Wake 0.21 Unregulated Discontinued: 2002–04

111 0208773375 Swift Creek at Secondary Road 1555 near 

Clayton, NC

35°34'30" 78°29'55" NAD 83 Johnston 114 (2) Active: October 2008 to September 2012

112 02088000 Middle Creek near Clayton, NC 35°34'15" 78°35'26" NAD 83 Johnston 83.5 Unregulated Active: October 1939 to September 2012113 02088315 Beaverdam Creek near Grantham, NC 35°17'08" 78°15'17" NAD 27 Wayne 5.01 Unregulated Discontinued: 1978–82114 02088383 Little River near Zebulon, NC 35°49'19" 78°21'08" NAD 83 Wake 55.0 Unregulated Active: October 2008 to September 2012115 02088470 Little River near Kenly, NC 35°35'20" 78°11'18" NAD 27 Johnston 191 Unregulated Discontinued: 1964–89116 02088500 Little River near Princeton, NC 35°30'41" 78°09'37" NAD 83 Johnston 232 Unregulated Active: February 1930 to September 2012117 02088682 Big Ditch at Retha Street at Goldsboro, NC 35°22'16" 78°00'15" NAD 27 Wayne 2.46 Unregulated Discontinued: 1980–84118 02089000 Neuse River near Goldsboro, NC 35°20'15" 77°59'51" NAD 83 Wayne 2,399 Regulated Active: February 1930 to September 2012119 02089216 Daileys Creek near Liddell, NC 35°12'30" 77°48'32" NAD 27 Lenoir 3.80 Unregulated Discontinued: 1978–81

120 02089222 Bear Creek near Parkstown, NC 35°22'22" 77°48'10" NAD 27 Greene 4.27 Unregulated Discontinued: 1978–82

121 0208925200 Bear Creek at Mays Store, NC 35°16'29" 77°47'40" NAD 83 Lenoir 57.7 Unregulated Active: October 1987 to September 2012

122 02089500 Neuse River at Kinston, NC 35°15'28" 77°35'08" NAD 83 Lenoir 2,692 Regulated Active: February 1930 to September 2012

123 02090380 Contentnea Creek near Lucama, NC 35°41'28" 78°06'35" NAD 83 Wilson 161 Regulated Active: September 1964 to September 2012

124 02090500 Contentnea Creek near Wilson, NC 35°41'10" 77°56'50" NAD 27 Wilson 236 Regulated Discontinued: 1930–54

125 02090512 Hominy Swamp at Phillips Street at 

Wilson, NC

35°42'39" 77°55'01" NAD 27 Wilson 8.20 Unregulated Discontinued: 1978–85

126 02090625 Turner Swamp near Eureka, NC 35°34'14" 77°52'47" NAD 27 Wayne 2.10 Unregulated Discontinued: 1968–87

127 02090960 Nahunta Swamp near Pikeville, NC 35°30'49" 77°58'53" NAD 27 Wayne 19.0 Unregulated Discontinued: 2000–03

128 0209096970 Moccasin Run near Patetown, NC 35°28'46" 77°54'37" NAD 27 Wayne 3.01 Unregulated Discontinued: 1988–98

129 02091000 Nanunta Swamp near Shine, NC 35°29'20" 77°48'22" NAD 83 Greene 80.4 Unregulated Active: April 1954 to September 2012

130 02091500 Contentnea Creek at Hookerton, NC 35°25'44" 77°34'57" NAD 83 Greene 733 Regulated Active: November 1928 to September 2012

131 02091700 Little Contentnea Creek near Farmville, NC 35°32'40" 77°30'41" NAD 27 Pitt 93.3 Unregulated Discontinued: 1956–87

132 0209173150 Unnamed Trib to Sandy Run at SR1335 

near Lizzie, NC

35°31'03" 77°33'52" NAD 27 Greene 0.34 Unregulated Discontinued: 2006–09

133 0209173190 Unnamed Tributary to Sandy Run near 

Lizzie, NC

35°31'31" 77°33'46" NAD 83 Greene 0.57 Unregulated Discontinued: 1999–2009

134 0209173192 Drainage ditch to tributary to Sandy Run 

near Lizzie, NC

35°31'30" 77°33'46" NAD 27 Greene 0.02 Unregulated Discontinued: 1999–2002
54 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 135 0209173200 Sandy Run near Lizzie, NC 35°31'53" 77°33'32" NAD 27 Greene 28.6 Unregulated Discontinued: 1999–2000 136 02091736 Middle Swamp near Farmville, NC 35°31'58" 77°32'43" NAD 83 Greene 53.7 Unregulated Discontinued: 1999–2005 137 02091737 Little Contentnea Creek near Willow Green, NC 35°31'30" 77°31'15" NAD 27 Greene 145 Unregulated Discontinued: 1999–2002 138 02091814 Neuse River near Fort Barnwell, NC 35°18'50" 77°18'10" NAD 83 Craven 3,900 Tidally affected Active: October 1996 to September 2012 139 02091960 Creeping Swamp near Calico, NC 35°25'42" 77°11'12" NAD 27 Beaufort 9.80 Unregulated Discontinued: 1971–77 140 02091970 Creeping Swamp near Vanceboro, NC 35°23'30" 77°13'46" NAD 27 Craven 27.0 Unregulated Discontinued: 1971–85 141 02092000 Swift Creek near Vanceboro, NC 35°20'42" 77°11'45" NAD 27 Craven 182 Unregulated Discontinued: 1950–89 142 02092020 Palmetto Swamp near Vanceboro, NC 35°20'18" 77°10'16" NAD 27 Craven 24.0 Unregulated Discontinued: 1971–76 143 0209205053 Swift Cr at NC 43 near Streets Ferry, NC 35°13'51" 77°06'50" NAD 83 Craven 269 Tidally affected Discontinued: 1996–2009 144 02092500 Trent River near Trenton, NC 35°03'51" 77°27'41" NAD 83 Jones 168 Unregulated Active: January 1951 to September 2012 145 02092554 Trent River at Pollocksville, NC 35°00'36" 77°13'08" NAD 83 Jones 370 Tidally affected Discontinued: 1996–2009 146 0209257120 W. P. Brice Creek below SR 1101 near Riverdale, NC 34°58'09" 77°02'55" NAD 27 Craven 11.2 Unregulated Discontinued: 1986–91 147 02093000 New River near Gum Branch, NC 34°50'57" 77°31'10" NAD 83 Onslow 94.0 Tidally affected Active: August 1949 to September 1973; July 1987 to September 2012 148 02093229 Hewletts Creek at SR 102 near Wilmington, NC 34°11'28" 77°53'32" NAD 27 New Hanover 2.08 Unregulated Discontinued: 1977–90 149 0209330990 Brooks Lake tributary near Browns Summit, NC 36°13'40" 79°43'20" NAD 27 Guilford 0.06 Unregulated Discontinued: 1985–90 150 0209331325 Candy Creek at SR 2700 near Monticello, NC 36°14'02" 79°39'43" NAD 27 Guilford 1.10 Unregulated Discontinued: 1985–90 151 02093500 Haw River near Benaja, NC 36°15'00" 79°34'00" NAD 27 Rockingham 168 Unregulated Discontinued: 1928–71 152 02093800 Reedy Fork near Oak Ridge, NC 36°10'21" 79°57'10" NAD 83 Guilford 20.6 (2) Active: October 1955 to September 2012 153 02093877 Brush Creek at Muirfield Road near Greens- boro, NC 36°07'41" 79°55'26" NAD 83 Guilford 5.30 Unregulated Active: April 2004 to September 2012 154 0209387778 Brush Creek at Fleming Road at Greens- boro, NC 36°08'25" 79°54'50" NAD 83 Guilford 7.41 Unregulated Discontinued: 1999–2004 155 0209399200 Horsepen Creek at U.S. 220 near Greensboro, NC 36°08'16" 79°51'36" NAD 83 Guilford 15.9 Unregulated Active: June 1999 to September 2012

156 02094000 Horsepen Creek at Battle Ground, NC 36°08'34" 79°51'24" NAD 27 Guilford 15.9 Unregulated Discontinued: 1925–31; 1934–59

157 02094412 Reedy Fork near Browns Summit, NC 36°10'46" 79°38'51" NAD 27 Guilford 125 Regulated Discontinued: 1999–2001
Table 1 55

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

158 02094500 Reedy Fork near Gibsonville, NC 36°10'23" 79°36'51" NAD 83 Guilford 131 Regulated Active: September 1928 to September 2012

159 02094659 South Buffalo Creek near Pomona, NC 36°02'58" 79°51'19" NAD 83 Guilford 7.33 Unregulated Active: June 1999 to September 2012

160 02094770 South Buffalo Creek at U.S. 220 at Greensboro, NC 36°02'17" 79°47'59" NAD 83 Guilford 15.4 Unregulated Active: August 1998 to September 2012

161 02094775 Ryan Creek below U.S. 220 at 

Greensboro, NC

36°01'52" 79°47'46" NAD 83 Guilford 4.12 Unregulated Active: August 1998 to September 2012

162 02095000 South Buffalo Creek near Greensboro, NC 36°03'36" 79°43'33" NAD 83 Guilford 34.0 Unregulated Active: August 1928 to September 1958; 

August 1998 to September 2012

163 0209509100 South Buffalo Creek at SR 2821 at 

McLeansville, NC

36°06'45" 79°40'19" NAD 27 Guilford 43.5 Unregulated Discontinued: 1986–88

164 02095181 North Buffalo Creek at Westover Terrace

at Greensboro, NC

36°04'45" 79°48'46" NAD 83 Guilford 9.55 Unregulated Active: June 1999 to September 2012

165 02095271 North Buffalo Creek at Church Street at 

Greensboro, NC

36°05'52" 79°46'57" NAD 83 Guilford 14.2 Unregulated Active: August 1998 to September 2012

166 02095500 North Buffalo Creek near Greensboro, NC 36°07'14" 79°42'29" NAD 83 Guilford 37.1 (2) Active: August 1928 to October 1990; 

August 1998 to September 2012

167 0209553650 Buffalo Creek at SR 2819 near McLeansville, NC 36°07'41" 79°39'42" NAD 83 Guilford 88.5 Unregulated Active: August 1998 to September 2012

168 0209555450 Buffalo Creek at SR 2719 near Osceola, NC 36°09'11" 79°36'51" NAD 27 Guilford 97.4 Unregulated Discontinued: 1986–87

169 0209560800 Reedy Fork Creek at NC 61 near Osceola, NC 36°10'44" 79°34'36" NAD 27 Guilford 243 Unregulated Discontinued: 1986–88

170 02096000 Stony Creek near Burlington, NC 36°11'00" 79°25'00" NAD 27 Alamance 44.2 Unregulated Discontinued: 1952–59

171 02096500 Haw River at Haw River, NC 36°05'14" 79°21'58" NAD 83 Alamance 606 Regulated Active: October 1928 to September 2012

172 02096700 Big Alamance Creek near Elon College, NC 36°02'21" 79°31'29" NAD 27 Alamance 116 Unregulated Discontinued: 1957–80

173 02096842 Cane Creek 0.1 mile above SR 1126 near 

Buckhorn, NC

36°01'33" 79°10'30" NAD 27 Orange 0.64 Unregulated Discontinued: 1979–81

174 02096846 Cane Creek near Orange Grove, NC 35°59'14" 79°12'22" NAD 83 Orange 7.54 Unregulated Active: November 1988 to September 2012

175 02096850 Cane Creek near Teer, NC 35°56'34" 79°14'46" NAD 27 Orange 33.7 Unregulated Discontinued: 1959–73

176 0209691590 Collins Creek above Secondary Road 1006 

near White Cross, NC

35°56'46" 79°11'41" NAD 83 Orange 1.65 Unregulated Active: March 2011 to September 2012

177 0209691611 Collins Creek at Highway 54 near White 

Cross, NC

35°55'53" 79°12'21" NAD 83 Orange 3.22 Unregulated Active: March 2011 to September 2012

178 02096960 Haw River near Bynum, NC 35°45'55" 79°08'09" NAD 83 Chatham 1,275 Regulated Active: October 1973 to September 2012
56 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 179 02097000 Haw River near Pittsboro, NC 35°42'07" 79°05'12" NAD 27 Chatham 1,310 (2) Discontinued: 1928–73 180 0209722970 Sandy Creek at Cornwallis Road near Durham, NC 35°58'59" 78°57'24" NAD 83 Durham 4.67 Unregulated Active: August 2008 to September 2012 181 02097243 Third Fork Creek at Durham, NC 35°58'43" 78°54'48" NAD 27 Durham 1.68 Unregulated Discontinued: 1968–73 182 02097280 Third Fork Creek at Woodcroft Parkway near Blands, NC 35°55'21" 78°57'08" NAD 83 Durham 14.8 Unregulated Active: August 2008 to September 2012 183 02097314 New Hope Creek near Blands, NC 35°53'06" 78°57'55" NAD 83 Durham 75.9 (2) Active: October 1982 to September 2012 184 0209736050 Battle Branch near Chapel Hill, NC 35°55'02" 79°01'57" NAD 27 Orange 0.42 Unregulated Discontinued: 1996–2001 185 0209741955 Northeast Creek at Secondary Road 1100 near Genlee, NC 35°52'20" 78°54'47" NAD 83 Durham 21.1 (2) Active: October 1982 to January 1994; August 1995 to September 2012 186 02097464 Morgan Creek near White Cross, NC 35°55'25" 79°06'54" NAD 83 Orange 8.35 Unregulated Active: November 1988 to September 2012 187 02097500 Morgan Creek near Chapel Hill, NC 35°53'51" 79°05'28" NAD 27 Orange 30.1 Regulated Discontinued: 1923–32 188 02097517 Morgan Creek near Chapel Hill, NC 35°53'36" 79°01'11" NAD 83 Orange 41.0 Regulated Active: November 1982 to September 2012 189 0209782150 New Hope River tributary at SR 1716 near Farrington, NC 35°45'50" 79°03'08" NAD 27 Chatham 2.05 Unregulated Discontinued: 1986–88 190 0209782609 White Oak Creek at mouth near Green Level, NC 35°45'37" 78°55'13" NAD 83 Wake 11.9 Unregulated Active: October 1999 to September 2012 191 02098000 New Hope River near Pittsboro, NC 35°44'12" 79°01'36" NAD 27 Chatham 285 (2) Discontinued: 1949–73 192 02098500 West Fork Deep River near High Point, NC 36°00'15" 79°58'42" NAD 27 Guilford 32.1 (2) Discontinued: 1923–26; 1928–58 193 02099000 East Fork Deep River near High Point, NC 36°02'14" 79°56'44" NAD 83 Guilford 14.8 Unregulated Active: July 1928 to March 1994; Octo- ber 1997 to September 2012 194 02099500 Deep River near Randleman, NC 35°54'13" 79°51'10" NAD 83 Randolph 125 (2) Discontinued: 1929–2004 195 02100000 Muddy Creek near Archdale, NC 35°52'35" 79°52'43" NAD 27 Randolph 16.7 Unregulated Discontinued: 1934–41 196 02100500 Deep River at Ramseur, NC 35°43'35" 79°39'20" NAD 83 Randolph 349 Regulated Active: November 1922 to September 2012 197 02101000 Bear Creek at Robbins, NC 35°26'03" 79°35'39" NAD 27 Moore 137 Unregulated Discontinued: 1939–71 198 0210106600 Deep River near Glendon, NC 35°29'20" 79°25'15" NAD 27 Moore 859 (2) Discontinued: 1993–96 199 0210108450 Suck Creek tributary near Zion Grove, NC 35°20'17" 79°35'57" NAD 27 Moore 0.67 Unregulated Discontinued: 1986–88 200 0210166029 Rocky River near Crutchfield Crossroads, NC 35°48'25" 79°31'39" NAD 83 Chatham 7.42 Unregulated Active: May 1988 to September 2012

201 02101726 Rocky River at US Highway 64 near 

Siler City, NC

35°44'06" 79°25'24" NAD 27 Chatham 68.7 Unregulated Active: February 2009 to September 2012
Table 1 57

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

202 02101800 Tick Creek near Mount Vernon Springs, NC 35°39'35" 79°24'06" NAD 83 Chatham 15.5 Unregulated Active: June 1958 to September 1981; 

January 1994 to September 2012

203 02102000 Deep River at Moncure, NC 35°37'37" 79°06'58" NAD 83 Lee 1,434 Regulated Active: July 1930 to September 2012

204 02102094 Cape Fear power plant discharge canal near 

Brickhaven, NC

35°35'05" 79°02'28" NAD 83 Chatham Indeterminate (2) Active: April 2008 to September 2012

205 02102192 Buckhorn Creek near Corinth, NC 35°33'35" 78°58'25" NAD 83 Chatham 76.3 Regulated Active: June 1972 to September 2012

206 02102500 Cape Fear River at Lillington, NC 35°24'22" 78°48'48" NAD 83 Harnett 3,464 Regulated Active: December 1923 to September 2012

207 02102897 Lower Little River near Lobelia, NC 35°12'13" 79°12'59" NAD 27 Moore 110 Unregulated Discontinued: 2003–04

208 02102908 Flat Creek near Inverness, NC 35°10'58" 79°10'39" NAD 83 Hoke 7.63 Unregulated Active: June 1968 to September 2012

209 02103000 Little River at Manchester, NC 35°11'36" 78°59'08" NAD 83 Cumberland 348 Unregulated Active: October 1938 to September 

1950; July 2002 to September 2012

210 02103500 Little River at Linden, NC 35°15'46" 78°46'35" NAD 27 Harnett 459 (2) Discontinued: 1928–71

211 02104000 Cape Fear River at Fayetteville, NC 35°03'02" 78°51'30" NAD 83 Cumberland 4,395 Unregulated Discontinued: 1889–1903; 1928–40

212 02104220 Rockfish Creek at Raeford, NC 34°59'59" 79°12'53" NAD 83 Hoke 93.1 Unregulated Active: July 1988 to September 2012

213 02104387 Buckhead Creek near Owens, NC 35°01'37" 78°57'08" NAD 27 Cumberland 2.85 Unregulated Discontinued: 1976–80

214 02104500 Rockfish Creek near Hope Mills, NC 34°57'57" 78°55'04" NAD 27 Cumberland 292 (2) Discontinued: 1929–31; 1939–54

215 02105500 Cape Fear River at William O. Huske 

Lock 3 near Tarheel, NC

34°50'08" 78°49'25" NAD 83 Bladen 4,852 Regulated Active: October 1937 to September 2012

216 02105524 Ellis Creek tributary at SR 1325 near 

White Oak, NC

34°46'02" 78°41'24" NAD 27 Bladen 1.81 Unregulated Discontinued: 1979–81

217 02105769 Cape Fear River at Lock 1 near Kelly, NC 34°24'16" 78°17'37" NAD 83 Bladen 5,255 Regulated Active: July 1969 to September 2012

218 02105900 Hood Creek near Leland, NC 34°16'43" 78°07'31" NAD 83 Brunswick 21.6 Unregulated Discontinued: 1956–73; 1993–2010

219 02106000 Little Coharie Creek near Roseboro, NC 34°57'13" 78°29'17" NAD 27 Sampson 92.8 Unregulated Discontinued: 1950–92

220 02106500 Black River near Tomahawk, NC 34°45'18" 78°17'19" NAD 83 Sampson 676 Unregulated Active: October 1951 to September 2012

221 02106681 Black River near Dunn, NC 35°16'58" 78°38'16" NAD 27 Harnett 48.3 Unregulated Discontinued: 1976–77

222 02107000 South River near Parkersburg, NC 34°48'45" 78°27'26" NAD 27 Bladen 379 Unregulated Discontinued: 1951–86

223 02107500 Colly Creek near Kelly, NC 34°27'48" 78°15'26" NAD 27 Bladen 108 Unregulated Discontinued: 1950–71

224 02107544 Black River near Currie, NC 34°25'54" 78°08'37" NAD 83 Pender 1,405 Tidally affected Discontinued: 2004–05

225 02107600 Northeast Cape Fear River near 

Seven Springs, NC

35°10'20" 77°55'56" NAD 27 Wayne 47.5 Unregulated Discontinued: 1958–75

226 0210782005 Nahunga Creek at SR 1301 near Warsaw, NC 35°01'36" 78°00'41" NAD 27 Duplin 8.30 Unregulated Discontinued: 1983–90
58 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 227 0210783230 Herrings Marsh Run near Summerlins Crossroads, NC 35°05'37" 77°56'35" NAD 27 Duplin 2.25 Unregulated Discontinued: 1991–99 228 0210783240 Herrings Marsh Run Tributary near Sum- merlins Crossroads, NC 35°05'49" 77°56'01" NAD 27 Duplin 1.49 Unregulated Discontinued: 1991–2000 229 0210783273 Herrings Marsh Run Tributary at Red Hill, NC 35°04'32" 77°54'49" NAD 27 Duplin 1.14 Unregulated Discontinued: 1991–97 230 0210783276 Herrings Marsh Run below SR 1306 at Red Hill, NC 35°04'25" 77°54'50" NAD 27 Duplin 9.11 Unregulated Discontinued: 1991–99 231 0210789100 Grove Creek at Kenansville, NC 34°58'13" 77°57'32" NAD 27 Duplin 22.6 Unregulated Discontinued: 1983–90 232 0210797940 Limestone Creek at NC 24 near Hadley, NC 34°54'55" 77°41'34" NAD 27 Duplin 1.61 Unregulated Discontinued: 1986–88 233 02108000 Northeast Cape Fear River near Chinquapin, NC 34°49'44" 77°49'56" NAD 83 Duplin 599 Unregulated Active: July 1940 to September 2012 234 02108500 Rockfish Creek near Wallace, NC 34°44'32" 78°02'22" NAD 27 Duplin 69.3 Unregulated Discontinued: 1955–81 235 02108548 Little Rockfish Creek at Wallace, NC 34°44'02" 77°58'03" NAD 27 Duplin 7.80 Unregulated Discontinued: 1976–92 236 02108566 Northeast Cape Fear River near Burgaw, NC 34°35'54" 77°52'31" NAD 83 Pender 920 Tidally affected Discontinued: 2003–05 237 02109500 Waccamaw River near Freeland, NC 34°05'42" 78°32'54" NAD 83 Brunswick 680 Unregulated Active: July 1939 to September 2012 238 02111000 Yadkin River at Patterson, NC 35°59'27" 81°33'30" NAD 83 Caldwell 28.8 Unregulated Active: October 1939 to September 2012 239 02111180 Elk Creek at Elkville, NC 36°04'17" 81°24'11" NAD 83 Wilkes 50.9 Unregulated Active: October 1965 to September 2012 240 0211139110 Yadkin River below W. Kerr Scott dam near Buck, NC 36°08'10" 81°13'24" NAD 83 Wilkes 367 Regulated Active: November 2007 to September 2012 241 02111500 Reddies River at North Wilkesboro, NC 36°10'30" 81°10'08" NAD 83 Wilkes 89.2 Unregulated Active: October 1939 to September 2012 242 02112000 Yadkin River at Wilkesboro, NC 36°09'09" 81°08'44" NAD 83 Wilkes 504 Regulated Active: April 1903 to June 1909; Octo- ber 1920 to September 2012 243 02112120 Roaring River near Roaring River, NC 36°15'01" 81°02'40" NAD 83 Wilkes 128 Unregulated Active: April 1964 to September 2012 244 02112250 Yadkin River at Elkin, NC 36°14'25" 80°50'56" NAD 83 Yadkin 866 Regulated Active: April 1964 to September 2012 245 02112360 Mitchell River near State Road, NC 36°18'41" 80°48'26" NAD 83 Surry 78.8 Unregulated Active: April 1964 to September 2012 246 02112500 Fisher River near Dobson, NC 36°23'05" 80°40'20" NAD 27 Surry 116 Unregulated Discontinued: 1920–32 247 02113000 Fisher River near Copeland, NC 36°20'28" 80°41'09" NAD 83 Surry 128 Unregulated Discontinued: 1931–2010 248 02113500 Yadkin River at Siloam, NC 36°16'55" 80°33'46" NAD 27 Surry 1,226 Regulated Discontinued: 1976–87

249 0211351575 Hogan Creek at SR2038 near Siloam, NC 36°19'20" 80°35'38" NAD 83 Surry 3.32 Unregulated Discontinued: 2004–07

250 0211371675 Pauls Creek above SR1625 near 

Pine Ridge, NC

36°32'29" 80°40'16" NAD 83 Surry 20.7 Unregulated Discontinued: 2004–07
Table 1 59

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

251 02113850 Ararat River at Ararat, NC 36°24'16" 80°33'42" NAD 83 Surry 231 Unregulated Active: April 1964 to September 2012

252 0211397263 Bull Creek at Ash Hill, NC 36°23'23" 80°34'40" NAD 83 Surry 3.30 Unregulated Discontinued: 2004–07

253 02114450 Little Yadkin River at Dalton, NC 36°17'57" 80°24'53" NAD 83 Stokes 42.8 Unregulated Active: August 1960 to September 2012

254 02115360 Yadkin River at Enon, NC 36°07'54" 80°26'38" NAD 83 Forsyth 1,694 Regulated Active: July 1964 to September 2012

255 02115500 Forbush Creek near Yadkinville, NC 36°08'00" 80°33'00" NAD 27 Yadkin 22.1 Unregulated Discontinued: 1940–71

256 02115750 Muddy Creek near Lewisville, NC 36°03'10" 80°22'10" NAD 27 Forsyth 82.8 Unregulated Discontinued: 1964–70

257 02115800 Silas Creek near Clemmons, NC 36°02'44" 80°21'15" NAD 27 Forsyth 11.8 Unregulated Discontinued: 1964–70

258 02115842 Tar Branch tributary at First Street at 

Winston-Salem, NC

36°05'40" 80°14'42" NAD 83 Forsyth 0.04 Unregulated Discontinued: 1979–82

259 02115850 Salem Creek at Winston-Salem, NC 36°04'06" 80°15'46" NAD 27 Forsyth 51.3 Unregulated Discontinued: 1964–70

260 02115854 Salem Creek tributary at Hawthorne Road, 

Winston-Salem, NC

36°04'40" 80°17'05" NAD 83 Forsyth 0.50 Unregulated Discontinued: 1979–82

261 02115856 Salem Creek near Atwood, NC 36°02'10" 80°18'35" NAD 27 Forsyth 65.6 Unregulated Discontinued: 1971–82

262 02115860 Muddy Creek near Muddy Creek, NC 36°00'01" 80°20'25" NAD 83 Forsyth 186 Unregulated Discontinued: 1964–79; 1988–91; 

2007–10

263 02115900 South Fork Muddy Creek near Clemmons, NC 36°00'22" 80°18'07" NAD 27 Forsyth 42.9 Unregulated Discontinued: 1964–79; 1988–91

264 02116500 Yadkin River at Yadkin College, NC 35°51'24" 80°23'13" NAD 83 Davie 2,280 Regulated Active: July 1928 to September 2012

265 02117030 Humpy Creek near Fork, NC 35°51'17" 80°26'24" NAD 27 Davie 1.05 Unregulated Discontinued: 1968–83

266 02117500 Rocky Creek at Turnersburg, NC 35°54'00" 80°48'00" NAD 27 Iredell 101 Unregulated Discontinued: 1940–71

267 02118000 South Yadkin River near Mocksville, NC 35°50'42" 80°39'32" NAD 83 Rowan 306 (2) Active: October 1938 to September 2012

268 02118500 Hunting Creek near Harmony, NC 36°00'02" 80°44'44" NAD 83 Iredell 155 Unregulated Active: October 1950 to September 2012

269 02119000 South Yadkin River at Cooleemee, NC 35°48'10" 80°33'22" NAD 27 Davie 569 (2) Discontinued: 1928–65

270 02119400 Third Creek near Stony Point, NC 35°52'04" 81°04'00" NAD 27 Alexander 4.84 Unregulated Discontinued: 1956–69

271 02120500 Third Creek at Cleveland, NC 35°44'38" 80°40'54" NAD 27 Rowan 87.4 Unregulated Discontinued: 1940–71

272 02120780 Second Creek near Barber, NC 35°43'03" 80°35'45" NAD 83 Rowan 118 Unregulated Active: April 1979 to September 2012

273 02121000 Yadkin River near Salisbury, NC 35°43'30" 80°23'50" NAD 27 Rowan 3,450 Unregulated Discontinued: 1895–1927

274 02121180 North Potts Creek at Linwood, NC 35°45'28" 80°19'24" NAD 27 Davidson 9.62 Unregulated Discontinued: 1980–90

275 02121493 Leonard Creek near Bethesda, NC 35°53'14" 80°12'30" NAD 27 Davidson 5.16 Unregulated Discontinued: 1978–81

276 02121500 Abbotts Creek at Lexington, NC 35°48'25" 80°14'05" NAD 83 Davidson 174 (2) Active: March 1940 to December 1957; 

October 1988 to September 2012
60 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 277 02122500 Yadkin River at High Rock, NC 35°35'46" 80°13'59" NAD 27 Davidson 4,000 Unregulated Discontinued: 1919–27 278 02123000 Uwharrie River near Trinity, NC 35°52'05" 79°59'31" NAD 27 Randolph 11.3 Unregulated Discontinued: 1934–41 279 02123500 Uwharrie River near Eldorado, NC 35°25'47" 80°01'04" NAD 83 Montgomery 342 Unregulated Discontinued: 1938–71 280 02123567 Dutchmans Creek near Uwharrie, NC 35°22'45" 80°01'49" NAD 83 Montgomery 3.44 Unregulated Discontinued: 1982–83; 1986–2004 281 0212393300 West Branch Rocky River below mouth of South Prong River near Cornelius, NC 35°28'04" 80°47'25" NAD 83 Mecklenburg 20.8 Unregulated Active: July 2004 to September 2012 282 02124080 Clarke Creek near Harrisburg, NC 35°24'51" 80°45'07" NAD 83 Cabarrus 21.9 (2) Active: July 2003 to September 2012 283 0212414900 Mallard Creek below Stony Creek near Harrisburg, NC 35°19'58" 80°42'57" NAD 83 Mecklenburg 34.6 Unregulated Active: December 1994 to September 2012 284 0212419274 Coddle Creek at Secondary Road 1612 near Davidson, NC 35°30'14" 80°44'11" NAD 83 Cabarrus 22.7 Unregulated Active: October 2002 to September 2012 285 02124269 Back Creek at Secondary Road 1173 near Harrisburg, NC 35°18'33" 80°40'25" NAD 83 Cabarrus 7.45 Unregulated Active: May 2009 to September 2012 286 0212427947 Reedy Cr at SR2803 near Charlotte, NC 35°15'23" 80°42'02" NAD 83 Mecklenburg 2.50 Unregulated Discontinued: 2001–07 287 0212429930 Wiberly Branch near Wilgrove, NC 35°13'40" 80°41'34" NAD 27 Mecklenburg 0.35 Unregulated Discontinued: 1984–93 288 0212429960 Reedy Creek tributary No. 2 below Wiberly Branch near Mint Hill, NC 35°13'47" 80°41'37" NAD 27 Mecklenburg 1.00 Unregulated Discontinued: 1988–93 289 0212430293 Reedy Creek below I-485 near Pine Ridge, NC 35°15'31" 80°39'46" NAD 83 Mecklenburg 12.6 Unregulated Active: September 2007 to September 2012 290 0212430653 McKee Creek at Secondary Road 2804 near Wilgrove, NC 35°15'14" 80°38'53" NAD 83 Mecklenburg 5.76 Unregulated Active: July 2007 to September 2012 291 0212433550 Rocky River above Irish Buffalo Creek near Rocky River, NC 35°19'18" 80°32'27" NAD 83 Cabarrus 278 (2) Active: April 2000 to September 2012 292 02124471 Dutch Buffalo Creek at NC 49 near Mount Pleasant, NC 35°25'37" 80°24'40" NAD 27 Cabarrus 45.1 Unregulated Discontinued: 1985–87 293 0212466000 Clear Creek at Secondary Road 3181 near Mint Hill, NC 35°12'30" 80°34'48" NAD 83 Mecklenburg 12.6 Unregulated Active: October 2002 to September 2012 294 0212467451 Goose Creek at Secondary Road 1524 near Indian Trail, NC 35°07'49" 80°37'53" NAD 27 Union 8.50 Unregulated Active: March 2009 to September 2012 295 0212467595 Goose Creek near Indian Trail, NC 35°07'30" 80°36'10" NAD 83 Union 11.0 Unregulated Active: October 2003 to September 2012

296 02124692 Goose Creek near Fairview, NC 35°09'13" 80°32'07" NAD 83 Union 24.0 Unregulated Active: November 1999 to September 2012

297 02124742 Rocky River near Stanfield, NC 35°10'10" 80°28'23" NAD 83 Union 628 (2) Active: April 2000 to September 2012

298 02125000 Big Bear Creek near Richfield, NC 35°20'05" 80°20'08" NAD 83 Stanly 55.6 Unregulated Discontinued: 1954–2010
Table 1 61

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

299 02125500 Richardson Creek near Marshville, NC 35°05'55" 80°23'05" NAD 27 Union 170 Unregulated Discontinued: 1940–44

300 02125557 Gourdvine Creek at SR 1715 near Olive 

Branch, NC

35°06'02" 80°20'11" NAD 27 Union 8.75 Unregulated Discontinued: 1978–82

301 02125696 Lane Creek at SR 2115 near Trinity, NC 34°50'39" 80°28'49" NAD 27 Union 3.98 Unregulated Discontinued: 1969–79

302 02125699 Wicker Branch at SR 1940 near Trinity, NC 34°52'53" 80°26'24" NAD 27 Union 5.83 Unregulated Discontinued: 1978–82

303 02125816 Lane’s Creek near Marshville, NC 34°58'31" 80°18'14" NAD 27 Union 87.8 Unregulated Discontinued: 1985–87

304 02126000 Rocky River near Norwood, NC 35°08'56" 80°10'33" NAD 83 Stanly 1,372 (2) Active: October 1929 to September 2012

305 02126500 Little Brown Creek near Polkton, NC 34°58'28" 80°11'26" NAD 27 Anson 13.5 Unregulated Discontinued: 1935–41

306 02127000 Brown Creek near Polkton, NC 35°02'00" 80°09'00" NAD 27 Anson 110 Unregulated Discontinued: 1937–71

307 02127500 Pee Dee River near Ansonville, NC 35°05'07" 79°59'57" NAD 27 Anson 6,320 Regulated Discontinued: 1938–42

308 02128000 Little River near Star, NC 35°23'14" 79°49'53" NAD 83 Montgomery 106 Unregulated Active: April 1954 to September 2012

309 02129000 Pee Dee River near Rockingham, NC 34°56'45" 79°52'11" NAD 83 Richmond 6,863 Regulated Active: August 1906 to January 1912; 

October 1927 to September 2012

310 02129500 North Fork Jones Creek near Wadesboro, NC 34°55'09" 80°04'27" NAD 27 Anson 9.43 Unregulated Discontinued: 1935–41

311 0213228795 Jordan Creek near Silver Hill, NC 34°58'12" 79°31'35" NAD 27 Scotland 0.36 Unregulated Discontinued: 1983–93

312 02132320 Big Shoe Heel Creek near Laurinburg, NC 34°45'02" 79°23'12" NAD 83 Scotland 83.3 Unregulated Active: June 1987 to September 2012

313 02133500 Drowning Creek near Hoffman, NC 35°03'40" 79°29'38" NAD 83 Richmond 183 (2) Active: October 1939 to September 2012

314 02133624 Lumber River near Maxton, NC 34°46'22" 79°19'55" NAD 83 Robeson 365 Unregulated Active: June 1987 to September 2012

315 02134170 Lumber River at Lumberton, NC 34°37'13" 79°00'40" NAD 83 Robeson 708 Unregulated Active: July 2000 to September 2012

316 02134480 Big Swamp near Tarheel, NC 34°42'37" 78°50'11" NAD 83 Robeson 229 Unregulated Active: October 1985 to September 2012

317 02134500 Lumber River at Boardman, NC 34°26'33" 78°57'37" NAD 83 Robeson 1,228 Unregulated Active: September 1929 to September 2012

318 02137000 Mill Creek at Old Fort, NC 35°37'59" 82°11'14" NAD 27 McDowell 20.6 Unregulated Discontinued: 1960–75

319 02137727 Catawba River near Pleasant Gardens, NC 35°41'09" 82°03'37" NAD 83 McDowell 126 Unregulated Active: October 1980 to September 2012

320 02138000 Catawba River near Marion, NC 35°42'26" 82°02'00" NAD 27 McDowell 172 Unregulated Discontinued: 1941–81

321 02138500 Linville River near Nebo, NC 35°47'41" 81°53'24" NAD 83 Burke 66.7 Unregulated Active: May 1907 to August 1908; June 

1922 to September 2012

322 02138520 Catawba River at Secondary Road 1223 

below Lake James near Bridgewater, NC

35°44'25" 81°50'04" NAD 83 Burke 386 Regulated Active: December 2008 to September 

2012

323 0213875850 High Shoals Creek near Dysartsville, NC 35°35'57" 81°54'19" NAD 27 McDowell 2.38 Unregulated Discontinued: 1986–88

324 0213903612 Catawba River at Calvin, NC 35°44'22" 81°43'45" NAD 83 Burke 508 Regulated Discontinued: 1991–2009
62 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 325 02139200 Bailey Fork near Morganton, NC 35°43'11" 81°43'30" NAD 27 Burke 7.86 Unregulated Discontinued: 1966–70 326 02139650 East Prong near Morganton, NC 35°44'29" 81°39'39" NAD 27 Burke 8.94 Unregulated Discontinued: 1966–74 327 0214042720 North Harper Creek near Kawana, NC 36°00'31" 81°51'13" NAD 27 Avery 1.25 Unregulated Discontinued: 1986–88 328 02140991 Johns River at Arneys Store, NC 35°50'01" 81°42'43" NAD 83 Burke 201 Unregulated Active: May 1985 to September 2012 329 02141150 Lower Creek at Mulberry Street at Lenoir, NC 35°54'20" 81°31'59" NAD 27 Caldwell 28.6 Unregulated Discontinued: 1966–78 330 02141245 Lower Creek at SR1501 near Morganton, NC 35°49'31" 81°38'10" NAD 27 Burke 89.5 Unregulated Discontinued: 1993–94 331 0214183365 Upper Little River at SR1740 near Petra Mills, NC 35°50'31" 81°21'43" NAD 27 Caldwell 33.9 Unregulated Discontinued: 1993–94 332 0214192500 Middle Little River at Moretz Dam near Bethlehem, NC 35°50'45" 81°16'46" NAD 27 Alexander 46.1 Unregulated Discontinued: 1993–94 333 02142000 Lower Little River at All Healing Springs, NC 35°56'44" 81°14'13" NAD 83 Alexander 28.2 Unregulated Active: January 1953 to September 1995; October 1997 to September 2012 334 02142500 Catawba River at Catawba, NC 35°43'00" 81°03'59" NAD 27 Catawba 1,535 Regulated Discontinued: 1896–99; 1935–62 335 0214253361 Balls Creek near Long Island, NC 35°41'13" 81°00'54" NAD 83 Catawba 15.6 Unregulated Discontinued: 2007–2010 336 0214253830 Norwood Creek nr Troutman, NC 35°40'50" 80°56'43" NAD 83 Iredell 7.18 Unregulated Discontinued: 1983–2006 337 02142600 Mountain Creek near Terrell, NC 35°34'02" 80°59'46" NAD 27 Catawba 42.4 Unregulated Discontinued: 1957–62 338 02142651 McDowell Creek at Westmoreland Road near Cornelius, NC 35°27'50" 80°52'35" NAD 83 Mecklenburg 2.35 Unregulated Discontinued: 1994–97 339 02142654 McDowell Creek near Huntersville, NC 35°24'25" 80°53'26" NAD 83 Mecklenburg 10.2 Unregulated Active: May 2006 to September 2012 340 0214265808 Torrence Creek at Bradford Hill Lane near Huntersville, NC 35°24'13" 80°52'58" NAD 83 Mecklenburg 7.29 Unregulated Active: August 2007 to September 2012 341 0214266000 McDowell Creek near Charlotte, NC 35°23'22" 80°55'15" NAD 83 Mecklenburg 26.3 Unregulated Active: November 1996 to September 2012 342 0214266075 Gar Creek at Secondary Road 2120 near Oakdale, NC 35°21'55" 80°53'11" NAD 83 Mecklenburg 2.67 Unregulated Discontinued: 1994–97 343 0214266080 Gar Creek near Croft, NC 35°21'41" 80°53'51" NAD 83 Mecklenburg 3.55 Unregulated Active: October 2002 to September 2012 344 0214269560 Killian Creek near Mariposa, NC 35°26'03" 81°01'48" NAD 83 Lincoln 36.4 (2) Active: October 1990 to June 1993; December 1994 to September 2012 345 02142900 Long Creek near Paw Creek, NC 35°19'43" 80°54'35" NAD 83 Mecklenburg 16.4 (2) Active: June 1965 to September 2012

346 02142914 Gum Branch near Thrift, NC 35°17'58" 80°56'47" NAD 83 Mecklenburg 5.28 Unregulated Active: May 2004 to September 2012

347 0214291555 Long Creek near Rhyne, NC 35°18'02" 80°58'22" NAD 83 Mecklenburg 31.5 (2) Active: October 1998 to September 2012
Table 1 63

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

348 0214295600 Paw Creek at Wilkinson Boulevard near 

Charlotte, NC

35°14'25" 80°58'28" NAD 83 Mecklenburg 10.4 Unregulated Active: October 1994 to September 2012

349 0214297160 Beaverdam Creek above Windy Gap Road 

near Shopton, NC

35°10'11" 80°59'16" NAD 83 Mecklenburg 4.47 (2) Active: January 2003 to September 2012

350 02143000 Henry Fork near Henry River, NC 35°41'04" 81°24'12" NAD 83 Catawba 83.2 Unregulated Active: July 1925 to November 1931; 

December 1941 to September 2012

351 02143040 Jacob Fork at Ramsey, NC 35°35'26" 81°34'01" NAD 83 Burke 25.7 Unregulated Active: October 1961 to September 2012

352 02143500 Indian Creek near Laboratory, NC 35°25'14" 81°15'55" NAD 83 Lincoln 69.2 (2) Active: August 1951 to September 2012

353 0214399575 Long Creek Tributary at Headwaters near 

Bessemer City, NC

35°18'12" 81°16'42" NAD 27 Gaston 0.16 Unregulated Discontinued: 1993–2001

354 0214399580 Long Creek Tributary below Headwaters 

near Bessemer City, NC

35°18'20" 81°16'32" NAD 27 Gaston 0.22 Unregulated Discontinued: 1993–2001

355 02144000 Long Creek near Bessemer City, NC 35°18'23" 81°14'05" NAD 83 Gaston 31.8 (2) Active: October 1952 to September 2012

356 02145000 South Fork Catawba River at Lowell, NC 35°17'07" 81°06'04" NAD 83 Gaston 628 Regulated Active: January 1942 to September 1971; 

October 1983 to September 2012

357 0214620760 Irwin Creek at Starita Road at Charlotte, NC 35°16'33" 80°49'34" NAD 83 Mecklenburg 4.40 Unregulated Discontinued: 1989–94

358 0214620805 Irwin Creek tributary below Starita Road at 

Charlotte, NC

35°16'20" 80°49'30" NAD 27 Mecklenburg 0.02 Unregulated Discontinued: 1994–98

359 02146211 Irwin Creek at Statesville Avenue at Charlotte, NC 35°15'43" 80°50'13" NAD 83 Mecklenburg 5.97 Unregulated Active: October 1981 to September 1994; November 1997 to September 2001; 

June 2004 to September 2012

360 0214627970 Stewart Creek at State Street at Charlotte, NC 35°14'25" 80°52'06" NAD 83 Mecklenburg 9.07 Unregulated Active: June 2000 to September 2012

361 02146285 Stewart Creek at West Morehead Street at 

Charlotte, NC

35°13'42" 80°52'09" NAD 83 Mecklenburg 11.1 Unregulated Active: October 2000 to September 2012

362 02146300 Irwin Creek near Charlotte, NC 35°11'52" 80°54'16" NAD 83 Mecklenburg 30.7 Unregulated Active: May 1962 to September 2012

363 02146315 Taggart Creek at West Boulevard Near 

Charlotte, NC

35°12'24" 80°55'19" NAD 83 Mecklenburg 5.71 Unregulated Active: July 1998 to September 2012

364 02146348 Coffey Creek near Charlotte, NC 35°08'45" 80°55'37" NAD 83 Mecklenburg 9.14 Unregulated Active: October 1998 to September 2012

365 0214635212 Unnamed tributary to Sugar Creek at 

Crompton Street near Charlotte, NC

35°06'57" 80°54'49" NAD 83 Mecklenburg 0.06 Unregulated Discontinued: 1995–98

366 02146381 Sugar Creek at NC 51 near Pineville, NC 35°05'27" 80°53'58" NAD 83 Mecklenburg 65.3 (2) Active: October 1994 to September 2012

367 02146409 Little Sugar Creek at Medical Center Drive 

at Charlotte, NC

35°12'13" 80°50'13" NAD 83 Mecklenburg 11.8 Unregulated Active: October 1994 to September 2012
64 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 368 0214642825 Briar Creek (above Shamrock Road) near Charlotte, NC 35°14'10" 80°46'16" NAD 83 Mecklenburg 5.20 Unregulated Active: April 1998 to September 2012 369 0214643820 Edwards Branch at Sheffield Drive at Charlotte, NC 35°12'12" 80°46'20" NAD 83 Mecklenburg 1.03 Unregulated Active: July 2004 to September 2012 370 0214643840 Edwards Branch tributary storm drain at Charlotte, NC 35°11'53" 80°47'01" NAD 27 Mecklenburg 0.02 Unregulated Discontinued: 1994–98 371 02146450 Briar Creek at Sharon Road, Charlotte, NC 35°10'47" 80°49'46" NAD 27 Mecklenburg 18.5 Unregulated Discontinued: 1962–73 372 0214645022 Briar Creek above Colony Road near Charlotte, NC 35°10'31" 80°49'51" NAD 83 Mecklenburg 19.0 Unregulated Active: December 1995 to September 2012 373 0214645075 Tributary to Briar Creek at Colony Road at Charlotte, NC 35°10'08" 80°49'51" NAD 83 Mecklenburg 1.03 Unregulated Active: October 2005 to September 2012 374 0214645080 Tributary to Briar Creek at Runnymeade Lane at Charlotte, NC 35°10'01" 80°50'12" NAD 83 Mecklenburg 1.19 Unregulated Active: June 2005 to September 2012 375 02146470 Little Hope Creek at Seneca Place near Charlotte, NC 35°09'52" 80°51'11" NAD 83 Mecklenburg 2.63 Unregulated Active: December 1982 to September 1990; October 1994 to September 2012 376 02146500 Little Sugar Creek near Charlotte, NC 35°09'13" 80°51'18" NAD 27 Mecklenburg 41.0 Unregulated Discontinued: 1924–78 377 0214650690 Little Sugar Creek tributary at Rose Valley Drive near Charlotte, NC 35°08'54" 80°51'40" NAD 27 Mecklenburg 0.12 Unregulated Discontinued: 1993–98 378 02146507 Little Sugar Creek at Archdale Drive at Charlotte, NC 35°08'53" 80°51'28" NAD 83 Mecklenburg 42.6 (2) Active: January 1978 to September 2012 379 02146530 Little Sugar Creek at Highway 51 at Pinev- ille, NC 35°05'07" 80°52'56" NAD 83 Mecklenburg 49.2 (2) Active: June 1997 to September 2012 380 0214655255 McAlpine Creek at SR 3150 near Idlewild, NC 35°10'33" 80°43'09" NAD 83 Mecklenburg 7.33 Unregulated Active: June 1999 to September 2012 381 02146562 Campbell Creek near Charlotte, NC 35°11'12" 80°44'12" NAD 83 Mecklenburg 5.71 Unregulated Active: June 1999 to September 2012 382 02146579 Irvin’s Creek at Lebanon Road near Mint Hill, NC 35°09'58" 80°41'24" NAD 27 Mecklenburg 5.27 Unregulated Discontinued: 1983–90 383 0214657975 Irvins Creek at SR 3186 near Charlotte, NC 35°09'31" 80°42'48" NAD 83 Mecklenburg 8.37 Unregulated Active: June 1999 to September 2012 384 02146600 McAlpine Creek at Sardis Road near Char- lotte, NC 35°08'16" 80°46'03" NAD 83 Mecklenburg 38.6 Unregulated Active: April 1962 to September 2012

385 0214666925 Four Mile Creek tributary near

 Providence, NC

35°03'48" 80°48'36" NAD 27 Mecklenburg 0.27 Unregulated Discontinued: 1994–98

386 0214669980 McMullen Creek tributary near Charlotte, NC 35°08'47" 80°48'34" NAD 27 Mecklenburg 0.13 Unregulated Discontinued: 1993–98
Table 1 65

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

387 02146700 McMullen Creek at Sharon View Road near 

Charlotte, NC

35°08'27" 80°49'12" NAD 83 Mecklenburg 6.95 Unregulated Active: April 1962 to September 2012

388 02146750 McAlpine Creek below McMullen Creek 

near Pineville, NC

35°03'59" 80°52'11" NAD 83 Mecklenburg 92.4 Unregulated Active: April 1974 to September 2012

389 02146761151 McAlpine Creek at Secondary Road 2964 

near Camp Cox, SC

35°02'27" 80°53'30" NAD 83 Lancaster 95.9 Regulated Active: October 2005 to September 2012

390 0214677974 Steele Creek above Secondary Road 1344 

near Shopton, NC

35°07'45" 80°57'12" NAD 27 Mecklenburg 3.57 Unregulated Discontinued: 1990–98

391 0214678175 Steele Creek at SR 1441 (Carowinds Boulevard) near Pineville, NC 35°06'18" 80°57'13" NAD 83 Mecklenburg 6.91 Unregulated Active: May 1998 to September 2012

392 0214678230 Walker Branch at SR1123 near 

Pine Harbor, NC

35°05'48" 80°58'22" NAD 27 Mecklenburg 4.52 Unregulated Discontinued: 1991–94

393 0214685800 Six Mile Creek near Pineville, NC 35°00'37" 80°49'42" NAD 83 Mecklenburg 20.3 Unregulated Active: October 2007 to September 2012

394 02146900 Twelve Mile Creek near Waxhaw, NC 34°57'07" 80°45'21" NAD 83 Union 76.5 Unregulated Discontinued: 1960–2004

395 02147126 Waxhaw Creek at Secondary Road 1103 

near Jackson, NC

34°50'13" 80°47'30" NAD 83 Union 35.1 Unregulated Active: May 2002 to September 2012

396 02148500 Broad River near Chimney Rock, NC 35°25'29" 82°10'54" NAD 27 Rutherford 97.0 Regulated Discontinued: 1927–58

397 02149000 Cove Creek near Lake Lure, NC 35°25'24" 82°06'42" NAD 83 Rutherford 79.0 Unregulated Active: October 1950 to September 2012

398 02149702 Green River near Saluda, NC 35°18'20" 82°16'31" NAD 27 Polk 104 Regulated Discontinued: 1972–75

399 02150000 Green River near Mill Spring, NC 35°20'10" 82°04'55" NAD 27 Polk 174 Regulated Discontinued: 1940–54

400 02150495 Second Broad River near Logan, NC 35°24'16" 81°52'21" NAD 83 Rutherford 86.2 Unregulated Active: October 1998 to September 2012

401 02151000 Second Broad River at Cliffside, NC 35°14'08" 81°45'57" NAD 27 Rutherford 220 (2) Discontinued: 1925–97

402 02151500 Broad River near Boiling Springs, NC 35°12'39" 81°41'51" NAD 83 Cleveland 875 Regulated Active: June 1925 to September 2012

403 02152000 Sandy Run Creek near Boiling Springs, NC 35°13'30" 81°41'50" NAD 27 Cleveland 67.0 Unregulated Discontinued: 1925–28

404 02152100 First Broad River near Casar, NC 35°29'35" 81°40'56" NAD 83 Cleveland 60.5 Unregulated Active: March 1959 to September 2012

405 02152285 First Broad River at SR1512 near 

Lawndale, NC

35°26'32" 81°36'47" NAD 83 Cleveland 129 Unregulated Discontinued: 2008–09

406 02152474 First Broad River at Lawndale, NC 35°24'55" 81°33'42" NAD 83 Cleveland 190 Unregulated Active: April 2008 to September 2012

407 02152500 First Broad River near Lawndale, NC 35°22'50" 81°32'40" NAD 27 Cleveland 200 Unregulated Discontinued: 1940–71

408 02152610 Sugar Branch near Boiling Springs, NC 35°15'00" 81°37'15" NAD 27 Cleveland 1.44 Unregulated Discontinued: 1968–87

409 03161000 South Fork New River at Jefferson, NC 36°23'36" 81°24'25" NAD 83 Ashe 205 Unregulated Active: October 1924 to September 2012
66 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 410 03161500 South Fork New River near Crumpler, NC 36°32'05" 81°20'35" NAD 27 Ashe 325 Unregulated Discontinued: 1908–16 411 03162500 North Fork New River at Crumpler, NC 36°30'15" 81°23'24" NAD 83 Ashe 277 Unregulated Discontinued: 1908–16; 1928–58 412 03439000 French Broad River near Rosman, NC 35°08'36" 82°49'29" NAD 83 Transylvania 67.9 Unregulated Active: May 1907 to June 1909; October 1935 to September 2012 413 03439500 French Broad at Calvert, NC 35°08'55" 82°47'59" NAD 27 Transylvania 103 Unregulated Discontinued: 1924–55 414 03440000 Catheys Creek near Brevard, NC 35°12'40" 82°47'00" NAD 27 Transylvania 11.7 Unregulated Discontinued: 1944–55; 1986–2004 415 03440500 Davidson River near Davidson River, NC 35°17'12" 82°44'15" NAD 27 Transylvania 31.0 Unregulated Discontinued: 1904–09 416 03441000 Davidson River near Brevard, NC 35°16'23" 82°42'21" NAD 83 Transylvania 40.4 Unregulated Active: October 1920 to September 1990; October 1993 to September 2012 417 03441440 Little River above High Falls near Cedar Mountain, NC 35°11'32" 82°36'49" NAD 27 Transylvania 26.8 Unregulated Discontinued: 1963–90 418 03441500 Little River near Penrose, NC 35°13'23" 82°38'07" NAD 27 Transylvania 41.4 Unregulated Discontinued: 1942–55 419 03442000 Crab Creek near Penrose, NC 35°14'02" 82°36'39" NAD 27 Transylvania 10.9 Unregulated Discontinued: 1942–55 420 03443000 French Broad River at Blantyre, NC 35°17'57" 82°37'26" NAD 83 Transylvania 296 (2) Active: October 1920 to September 2012 421 03444000 Boylston Creek near Horseshoe, NC 35°22'10" 82°33'50" NAD 27 Henderson 14.8 Unregulated Discontinued: 1942–55 422 03444500 South Fork Mills River at the Pink Beds, NC 35°21'58" 82°44'22" NAD 27 Transylvania 9.99 Unregulated Discontinued: 1926–49; 1965–73 423 03445000 South Fork Mills River near Sitton, NC 35°22'55" 82°36'48" NAD 27 Henderson 40.0 Unregulated Discontinued: 1904–09; 1925–26 424 03445500 North Fork Mills River at Pinkbed, NC 35°23'37" 82°37'30" NAD 27 Henderson 23.1 Unregulated Discontinued: 1904–09 425 03446000 Mills River at Mills River, NC 35°23'53" 82°35'42" NAD 83 Henderson 66.7 (2) Active: September 1924 to September 1926; October 1933 to September 2012 426 03446500 Clear Creek near Hendersonville, NC 35°21'14" 82°26'40" NAD 27 Henderson 42.2 Unregulated Discontinued: 1945–55 427 03447000 Mud Creek at Naples, NC 35°23'14" 82°30'14" NAD 27 Henderson 109 Unregulated Discontinued: 1938–55 428 03447500 Cane Creek at Fletcher, NC 35°26'08" 82°29'23" NAD 27 Henderson 63.1 Unregulated Discontinued: 1942–58 429 03447687 French Broad River near Fletcher, NC 35°25'39" 82°32'53" NAD 83 Henderson 640 (2) Active: July 2001 to September 2012 430 0344789265 Boyd Branch at Bent Creek Gap Road near Lake Powhatan, NC 35°28'54" 82°38'05" NAD 83 Buncombe 1.03 Unregulated Discontinued: 2004–05 431 03447894 Bent Creek at Bent Creek Gap near Glen Bald, NC 35°29'37" 82°36'40" NAD 83 Buncombe 8.74 Unregulated Discontinued: 2001–10

432 03448000 French Broad River at Bent Creek, NC 35°30'07" 82°35'33" NAD 27 Buncombe 676 (2) Discontinued: 1933–86

433 03448500 Hominy Creek at Candler, NC 35°32'28" 82°40'35" NAD 27 Buncombe 79.8 Unregulated Discontinued: 1942–77
Table 1 67

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

434 03448800 Swannanoa River at Interstate 40 at Black 

Mountain, NC

35°37'08" 82°18'28" NAD 83 Buncombe 4.24 Unregulated Discontinued: 2009–10

435 0344894205 North Fork Swannanoa River near Walkertown, NC 35°41'00" 82°19'59" NAD 83 Buncombe 14.5 Unregulated Active: February 1989 to September 2012

436 03448960 North Fork Swannanoa River below Burnett 

Reservoir near Black Mountain, NC

35°39'28" 82°20'51" NAD 27 Buncombe 22.1 Regulated Discontinued: 1976–77

437 03449000 North Fork Swannanoa River near Black 

Mountain, NC

35°39'11" 82°21'04" NAD 27 Buncombe 23.8 (2) Discontinued: 1926–58

438 03449500 Swannanoa River at Swannanoa, NC 35°36'11" 82°23'42" NAD 27 Buncombe 58.8 (2) Discontinued: 1907–09; 1926–31

439 03450000 Beetree Creek near Swannanoa, NC 35°39'11" 82°24'19" NAD 83 Buncombe 5.46 Unregulated Active: February 1926 to September 

1975; October 1979 to September 1981; October 1985 to September 1986; May 1987 to September 2012

440 0345092550 Ross Creek at Beaucatcher Road at Asheville, NC 35°35'15" 82°31'49" NAD 27 Buncombe 2.46 Unregulated Discontinued: 1986–89

441 03451000 Swannanoa River at Biltmore, NC 35°34'06" 82°32'41" NAD 83 Buncombe 130 (2) Active: October 1920 to September 

1926; May 1934 to September 2012

442 0345112600 Nasty Branch at Asheville, NC 35°34'44" 82°33'35" NAD 27 Buncombe 1.19 Unregulated Discontinued: 1986–89

443 03451500 French Broad River at Asheville, NC 35°36'32" 82°34'41" NAD 83 Buncombe 945 (2) Active: Oct 1895 to September 2012

444 03451510 Reed Creek above Barnard Avenue at 

Asheville, NC

35°36'52" 82°33'41" NAD 27 Buncombe 2.13 Unregulated Discontinued: 1986–89

445 03451690 Newfound Creek near Alexander, NC 35°39'59" 82°38'04" NAD 83 Buncombe 34.2 Unregulated Discontinued: 2000–06

446 03452000 Sandymush Creek near Alexander, NC 35°43'49" 82°40'11" NAD 27 Madison 79.5 Unregulated Discontinued: 1942–55

447 03452001 Sandymush Creek 1.1 mile above mouth 

near Alexander, NC

35°43'55" 82°40'22" NAD 27 Buncombe 79.5 Unregulated Discontinued: 1975–77

448 03453000 Ivy River near Marshall, NC 35°46'11" 82°37'15" NAD 83 Madison 158 (2) Active: October 1933 to September 

1973; July 1994 to September 2012

449 03453500 French Broad River at Marshall, NC 35°47'11" 82°39'39" NAD 83 Madison 1,332 (2) Active: October 1942 to September 2012

450 03454000 Big Laurel Creek near Stackhouse, NC 35°55'11" 82°45'42" NAD 27 Madison 126 Unregulated Discontinued: 1934–71

451 03454500 French Broad River at Hot Springs, NC 35°53'23" 82°49'16" NAD 27 Madison 1,567 (2) Discontinued: 1934–49

452 03455500 West Fork Pigeon River above Lake Logan 

near Hazelwood, NC

35°23'46" 82°56'15" NAD 83 Haywood 27.6 Unregulated Active: February 1954 to September 2012

453 0345577330 West Fork Pigeon River near Retreat, NC 35°25'36" 82°55'11" NAD 83 Haywood 33.5 Regulated Active: March 1988 to September 2012
68 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 454 03456000 West Fork Pigeon River below Lake Logan near Waynesville, NC 35°26'38" 82°54'46" NAD 27 Haywood 55.3 Regulated Discontinued: 1954–80 455 03456100 West Fork Pigeon River at Bethel, NC 35°27'50" 82°54'00" NAD 83 Haywood 58.4 Regulated Active: January 1981 to September 2012 456 0345638607 Unnamed tributary to Pisgah Creek at Flat Laurel Gap, NC 35°24'19" 82°45'23" NAD 27 Haywood 0.07 Unregulated Discontinued: 2001–03 457 03456500 East Fork Pigeon River near Canton, NC 35°27'42" 82°52'11" NAD 83 Haywood 51.5 Unregulated Active: March 1954 to September 2012 458 03456991 Pigeon River near Canton, NC 35°31'23" 82°50'48" NAD 83 Haywood 130 Regulated Active: May 1907 to June 1909; October 1928 to September 2012 459 03457000 Pigeon River at Canton, NC 35°31'30" 82°50'28" NAD 27 Haywood 133 Regulated Discontinued: 1907–09; 1928–83 460 03457500 Allen Creek near Hazelwood, NC 35°25'49" 83°00'30" NAD 27 Haywood 14.4 Unregulated Discontinued: 1949–72 461 03458500 Pigeon River near Crabtree, NC 35°34'37" 82°57'07" NAD 27 Haywood 243 Regulated Discontinued: 1920–29 462 03459000 Jonathan Creek near Cove Creek, NC 35°37'22" 83°00'26" NAD 27 Haywood 65.3 Unregulated Discontinued: 1930–72 463 03459500 Pigeon River near Hepco, NC 35°38'06" 82°59'24" NAD 83 Haywood 350 Regulated Active: July 1927 to September 2012 464 03460000 Cataloochee Creek near Cataloochee, NC 35°40'03" 83°04'25" NAD 83 Haywood 49.2 Unregulated Active: October 1933 to September 1952; October 1962 to September 2012 465 03460500 Pigeon River near Mount Sterling, NC 35°43'25" 83°01'42" NAD 27 Haywood 460 Regulated Discontinued: 1924–30 466 03460795 Pigeon River near Waterville, NC 35°47'01" 83°06'43" NAD 83 Haywood 538 Regulated Active: February 1997 to September 2012 467 03462000 North Toe River at Altapass, NC 35°53'59" 82°01'50" NAD 27 Mitchell 104 Unregulated Discontinued: 1938–57 468 03462500 North Toe River above Spruce Pine, NC 35°54'32" 82°03'03" NAD 27 Mitchell 111 Unregulated Discontinued: 1934–38 469 03463300 South Toe River near Celo, NC 35°49'53" 82°11'03" NAD 83 Yancey 43.3 Unregulated Active: July 1957 to September 2012 470 03463500 South Toe River at Newdale, NC 35°54'22" 82°11'19" NAD 27 Yancey 60.8 Unregulated Discontinued: 1934–52 471 03464000 Cane River near Sioux, NC 36°00'52" 82°19'40" NAD 27 Yancey 157 Unregulated Discontinued: 1934–71 472 03464500 Nolichucky River at Poplar, NC 36°04'28" 82°20'42" NAD 27 Mitchell 608 Unregulated Discontinued: 1925–55 473 03479000 Watauga River near Sugar Grove, NC 36°14'21" 81°49'20" NAD 83 Watauga 92.1 Unregulated Active: October 1939 to September 2012 474 03480500 Elk River near Banner Elk, NC 36°10'07" 81°54'33" NAD 27 Avery 17.8 Unregulated Discontinued: 1934–40 475 03481000 Elk River near Elk Park, NC 36°11'01" 81°57'45" NAD 27 Avery 42.0 Unregulated Discontinued: 1934–55 476 03500000 Little Tennessee River near Prentiss, NC 35°09'00" 83°22'47" NAD 83 Macon 140 Unregulated Active: October 1943 to September 2012

477 03500240 Cartoogechaye Creek near Franklin, NC 35°09'32" 83°23'39" NAD 83 Macon 57.1 Unregulated Active: June 1961 to September 2012

478 03500500 Cullasaja River at Highlands, NC 35°04'14" 83°13'57" NAD 27 Macon 14.9 Regulated Discontinued: 1931–71
Table 1 69

Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued[USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are 

indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and 

flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)]

Site

index

number

(figs. 4, 5)

USGS

station

number

Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record

479 0350056050 Cullasaja River at Secondary Road 1620 

near Highlands, NC

35°04'34" 83°14'56" NAD 83 Macon 18.8 Regulated Discontinued: 2001–10

480 03501000 Cullasaja River at Cullasaja, NC 35°09'59" 83°19'25" NAD 27 Macon 86.5 Regulated Discontinued: 1907–09; 1921–71

481 03501500 Little Tennessee River at Franklin, NC 35°11'10" 83°22'20" NAD 27 Macon 295 Regulated Discontinued: 1909–10; 1921–25

482 03502000 Little Tennessee River at Iotla, NC 35°14'03" 83°23'42" NAD 27 Macon 323 Regulated Discontinued: 1929–45

483 03502500 Little Tennessee River at Etna, NC 35°16'42" 83°26'55" NAD 27 Macon 374 Regulated Discontinued: 1926–29

484 03503000 Little Tennessee River at Needmore, NC 35°20'11" 83°31'37" NAD 83 Swain 436 Regulated Active: October 1943 to December 1981; 

October 1983 to September 2012

485 03503500 Little Tennessee River at Almond, NC 35°22'53" 83°33'13" NAD 27 Swain 451 Regulated Discontinued: 1912–17

486 03504000 Nantahala River at Rainbow Springs, NC 35°07'39" 83°37'07" NAD 83 Macon 51.9 Unregulated Active: October 1940 to September 2012

487 03505500 Nantahala River at Nantahala, NC 35°17'55" 83°39'21" NAD 27 Swain 144 Regulated Discontinued: 1942–81

488 03505550 Nantahala River near Hewitt, NC 35°18'18" 83°39'08" NAD 83 Swain 145 Regulated Active: December 2004 to September 2012

489 03506500 Nantahala River at Almond, NC 35°22'32" 83°33'59" NAD 27 Swain 174 Regulated Discontinued: 1912–17; 1920–43

490 03507000 Little Tennessee River at Judson, NC 35°24'30" 83°33'26" NAD 27 Swain 664 Regulated Discontinued: 1912–44

491 03508000 Tuckasegee River at Tuckasegee, NC 35°16'55" 83°07'37" NAD 27 Jackson 143 Regulated Discontinued: 1934–76

492 03508050 Tuckasegee River at Secondary Road 1172 

near Cullowhee, NC

35°17'16" 83°08'38" NAD 83 Jackson 147 Regulated Active: September 2004 to September 

2012

493 03508136 Caney Fork near Cowarts, NC 35°18'41" 83°05'23" NAD 27 Jackson 32.0 Unregulated Discontinued: 1975–76

494 03508910 Scott Creek at Willets-Ochre Hill, NC 35°23'51" 83°07'46" NAD 27 Jackson 22.4 Unregulated Discontinued: 1993–95

495 03509000 Scott Creek above Sylva, NC 35°23'02" 83°12'51" NAD 27 Jackson 51.0 Unregulated Discontinued: 1941–75; 1993–95

496 03509500 Scott Creek at Sylva, NC 35°22'25" 83°13'05" NAD 27 Jackson 55.0 Unregulated Discontinued: 1928–41

497 03510500 Tuckasegee River at Dillsboro, NC 35°22'00" 83°15'37" NAD 27 Jackson 347 Regulated Discontinued: 1933–81

498 03510577 Tuckasegee River at Barkers Creek, NC 35°23'04" 83°17'30" NAD 83 Jackson 360 Regulated Active: July 2004 to September 2012

499 03511000 Oconaluftee River at Cherokee, NC 35°29'04" 83°18'56" NAD 27 Swain 131 Unregulated Discontinued: 1921–49

500 03512000 Oconaluftee River at Birdtown, NC 35°27'41" 83°21'13" NAD 83 Swain 184 Unregulated Active: July 1945 to September 1946; 

July 1948 to September 2012

501 03513000 Tuckasegee River at Bryson City, NC 35°25'39" 83°26'49" NAD 83 Swain 655 Regulated Active: Oct 1897 to December 1981; 

October 1983 to January 1995; April 

1996 to September 2012

502 03513500 Noland Creek near Bryson City, NC 35°29'05" 83°30'15" NAD 27 Swain 13.8 Unregulated Discontinued: 1935–71
70 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 1. Summary of active and discontinued U.S. Geological Survey continuous-record streamgaging stations in North Carolina with streamflow data available through the 2012 water year that were considered for computation of low-flow and flow-duration statistics.—Continued [USGS, U.S. Geological Survey; °, degrees; ', minutes; ", seconds; NAD 27, North American Datum of 1927; NAD 83, North American Datum of 1983; mi2, square mile. Drainage areas for some sites are indeterminate. The periods of record for active sites are provided using months and years, and the periods of record for discontinued are provided in years only. The flow condition indicates whether flows are unregulated, regulated, tidally affected, or some combination of other effects, including diversions upstream from the streamgage. Shaded rows indicate sites for which low-flow characteristics (table 3) and flow-duration statistics (table 5) are published in this report. Rows not shaded are sites for which low-flow characteristics and flow-duration statistics were excluded from publication (figs. 4, 5)] Site index number (figs. 4, 5) USGS station number Station name Latitude Longitude Horizontal datum County Drainage area, in mi2 Flow condition Site status and period of record 503 03514000 Hazel Creek at Proctor, NC 35°28'38" 83°42'58" NAD 27 Swain 44.4 Unregulated Discontinued: 1942–52 504 03515000 Little Tennessee River at Fontana Dam, NC 35°26'45" 83°48'20" NAD 27 Graham 1,571 Regulated Discontinued: 1938–55 505 03516000 Snowbird Creek near Robbinsville, NC 35°18'40" 83°51'35" NAD 27 Graham 42.0 Unregulated Discontinued: 1942–52 506 03517000 Cheoah River at Johnson, NC 35°23'02" 83°51'49" NAD 27 Graham 177 Unregulated Discontinued: 1912–18; 1920–26 507 0351706800 Cheoah River near Bearpen Gap near Tapoco, NC 35°26'18" 83°55'08" NAD 83 Graham 206 Regulated Active: October 1999 to September 2012 508 03517500 Cheoah River at Tapoco, NC 35°26'44" 83°56'17" NAD 27 Graham 215 Unregulated Discontinued: 1924–27 509 03546000 Shooting Creek near Hayesville, NC 35°01'29" 83°42'27" NAD 27 Clay 37.6 Unregulated Discontinued: 1922–24; 1942–45; 1946–55 510 03547000 Hiwassee River below Chatuge Dam near Hayesville, NC 35°01'45" 83°47'45" NAD 27 Clay 190 Regulated Discontinued: 1942–74 511 03548000 Hiwassee River below Hayesville, NC 35°04'47" 83°49'54" NAD 27 Clay 252 Regulated Discontinued: 1934–45 512 03548330 Brasstown Creek near Brasstown, NC 35°02'24" 83°57'33" NAD 83 Clay 83.1 Unregulated Discontinued: 1944; 1947; 1953–55; 1960–64; 1988; 2000–07 513 03548500 Hiwassee River above Murphy, NC 35°04'53" 84°00'10" NAD 83 Cherokee 406 Regulated Discontinued: 1897–2004 514 03550000 Valley River at Tomotla, NC 35°08'20" 83°58'50" NAD 83 Cherokee 104 Unregulated Active: June 1904 to December 1909; January 1914 to April 1917; October 1918 to September 2012 515 03554000 Nottely River near Ranger, NC 35°01'37" 84°06'55" NAD 27 Cherokee 272 Unregulated Discontinued: 1901–05; 1914–17; 1919–29; 1932–45 516 03555000 Hiwassee River at Hiwassee Dam, NC 35°08'44" 84°11'09" NAD 27 Cherokee 968 Regulated Discontinued: 1934–43

1Streamgage operated and maintained by USGS North Carolina Water Science Center.2Flow characteristics reflect effects of some minor regulation and (or) diurnal fluctuation during periods of low flow caused by municipalities, power plants, industries, 

and (or) small impoundments upstream from the station. At some sites, low-flow characteristics may reflect the effects of diversions upstream from the station.
Table 5 71

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

8 02053200 1959–2012 0

 (7/28/2011)

222

(.99)

15,200

 (9/17/1999)

 2.9 4.9 15.0 73.0 252.0 612.0 937.0

11 02053500 1965–2012 0.59

 (8/29/2010)

60.1

(.95)

7,710

 (9/17/1999)

 3.0 4.0 7.2 17.0 48.0 126.0 248.0

14 02068500 1950–84; 

1986–87; 

1993–2012

21

 (9/4/1999)

190

(1.47)

6,830

 (9/22/1979)

 65.0 76.0 104.0 150.0 219.0 318.0 420.0

16 02070500 1930–71; 

1994–2012

33

 (8/11/2002)

310

(1.28)

11,400

 (9/18/1945)

 101.0 122.0 164.0 231.0 336.0 492.0 687.0

17 02071000 1950–2012 63

 (8/12/2002)

1170

(1.11)

47,800

 (6/22/1972)

 301.0 378.0 541.0 802.0 1,230.0 1,970.0 2,950.0

19 02074000 1951–2012 46

 (8/14/1967)

639

(1.19)

16,700

 (6/21/1972)

 176.0 222.0 319.0 457.0 753.0 1,170.0 1,540.0

22 02075160 1962–74; 

1989

0.21

 (10/3/1968)

26.9

(.82)

1,950

 (6/21/1972)

 1.6 3.0 7.2 14.0 26.0 49.0 87.0

23 02077200 1965–2012 0

 (7/9/1966)

44.7

(.97)

7,400

 (8/28/1995)

 0 0.68 4.0 15.0 37.0 84.0 160.0

25 02077240 1965–75; 

1978–82

0

 (3/22/1977)

7.51

(1.01)

994

 (7/13/1975)

 0.46 0.77 1.4 3.0 6.2 12.0 23.0

26 02077250 1967–78 0

 (8/24/1968)

55.5

(.98)

3,660

 (7/14/1975)

 0.91 2.4 6.4 19.0 45.0 100.0 199.0

28 02077303 1974–2012 0.27

 (11/2/1997)

154

(.76)

9,280

 (7/14/1975)

 4.1 8.2 14.0 24.0 103.0 343.0 696.0

30 02077670 1984–2012 0.27

 (8/21/1999)

35.8

(.67)

2,260

 (9/7/1996)

 2.1 2.6 3.1 5.6 40.0 97.0 147.0

31 02080500 1964–93; 

1995;

1997–2012

818

 (11/15/1970)

7,680

(.92)

36,000

 (9/11/1996)

 1,750.0 2,040.0 2,550.0 5,710.0 10,200.0 18,700.0 20,100.0

35 0208111310 1988–2012 0

 (7/30/1987)

110

(1.02)

14,500

 (9/17/1999)

 0 0.02 2.2 30.0 109.0 257.0 445.0
72 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 38 02081500 1940–2012 0 (9/7/2007) 151 (.9) 10,800 (9/7/1996) 1.2 2.8 11.0 42.0 117.0 314.0 616.0 39 02081747 1974–2012 2.1 (8/14/2002) 410 (.96) 22,400 (9/17/1999) 20.0 31.0 68.0 161.0 372.0 829.0 1,660.0 40 02081800 1957–75 0.85 (9/25/1968) 50.4 (1.05) 2,100 (6/29/1973) 9.3 12.0 18.0 31.0 52.0 86.0 143.0 43 02082500 1951–69 0.02 (9/3/1954) 64.2 (.99) 2,700 (10/6/1964) 0.4 1.1 5.0 26.0 72.0 158.0 252.0 45 02082506 1973–2011 4.1 (10/28/2007) 771 (.99) 25,000 (9/17/1999) 69.0 87.0 138.0 360.0 831.0 1,830.0 3,050.0 46 02082585 1977–93; 1996–2012 3.4 (12/14/2007) 893 (.97) 31,500 (9/17/1999) 64.0 87.0 153.0 436.0 972.0 2,090.0 3,550.0 50 02082770 1964–93; 1997–2012 0.6 (9/25/1968) 159 (.96) 22,000 (9/17/1999) 13.0 21.0 44.0 88.0 164.0 330.0 529.0 51 02082950 1960–2012 0.14 (10/17/2007) 159 (.9) 20,000 (9/17/1999) 6.4 12.0 29.0 74.0 159.0 340.0 580.0 52 02083000 1927–93; 1995; 1997–2012 0.21 (9/22/2010) 478 (.91) 29,200 (9/18/1999) 41.0 62.0 122.0 262.0 503.0 1,050.0 1,740.0 53 02083500 1972–93; 1997–2012 28 (10/17/2007) 2,190 (1.) 70,500 (9/19/1999) 168.0 230.0 439.0 1,150.0 2,540.0 5,520.0 7,970.0 55 02083800 1958–93; 1995; 1997–2001 0.74 (8/25/1993) 79.7 (1.02) 15,000 (9/18/1999) 3.6 5.4 12.0 33.0 86.0 180.0 286.0 59 02084160 1976–86; 1993; 1995; 1997–2012

0

 (7/19/1976)

52.9

(1.18)

4,860

 (10/1/2010)

 0 0.3 3.0 14.0 44.0 114.0 206.0

64 02084500 1951–80 0.5

 (9/27/1978)

10.6

(1.11)

400

 (11/7/1977)

 0.8 0.93 1.4 4.1 12.0 26.0 38.0

65 02084540 1966–93 0

 (9/22/1968)

35.2

(1.35)

1,880

 (10/1/1971)

 0.01 0.28 4.2 16.0 42.0 89.0 130.0
Table 5 73

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

67 02084557 1978–2012 0

 (8/21/1983)

24.4

(1.06)

385

 (11/7/1977)

 0 0.06 0.97 8.8 32.0 69.0 100.0

74 02084909 1988–2004 0

 (8/3/1988)

13.5

(.96)

1,080

 (9/6/1996)

 0.08 0.24 1.3 4.4 11.0 26.0 49.0

75 02085000 1928–71; 

1986–2012

0.02

 (7/10/1986)

58.7

(.89)

4,600

 (9/6/1996)

 2.2 3.6 9.5 24.0 53.0 110.0 204.0

76 02085070 1964–2012 0.08

 (8/14/1977)

123

(.87)

9,900

 (9/6/1996)

 3.7 6.3 18.0 49.0 106.0 250.0 462.0

77 0208521324 1962–20111 0

 (8/19/1988)

70.4

(.9)

6,500

 (9/6/1996)

 0.81 2.2 8.0 24.0 59.0 135.0 248.0

79 0208524090 1995–2012 0

 (8/3/1999)

6.47

(.81)

1,000

 (9/6/1996)

 0.05 0.1 0.4 1.8 5.0 11.0 21.0

80 0208524975 1997–2012 0.41

 (11/22/1998)

59.4

(.6)

10,300

 (9/6/1996)

 1.0 1.9 2.8 6.2 27.0 104.0 216.0

81 02085500 1963–2012 0

 (10/12/2007)

135

(.91)

21,800

 (9/6/1996)

 2.3 4.9 14.0 45.0 108.0 264.0 492.0

82 02086000 1926–71; 

1990–91

0

 (10/1/1925)

4.16

(.88)

389

 (5/24/1940)

 0.04 0.2 0.72 1.8 3.9 7.9 14.0

84 0208650112 1989–90; 

1995–2012

0

 (6/22/1988)

0.89

(.78)

225

 (9/6/1996)

 0 0 0.03 0.19 0.59 1.5 3.0

85 02086624 1983–95; 

2007–12

0.99

 (6/12/2008)

38.1

(.89)

2,920

 (3/4/1993)

 2.4 2.9 4.3 7.6 24.0 67.0 154.0

89 0208700780 1983–95 0.03

 (9/30/1995)

11.7

(1.16)

740

 (6/29/1995)

 0.32 0.48 0.93 2.2 6.2 20.0 46.0

91 02087183 1984–2012 26

 (3/4/2008)

576

(.75)

7,420

 (9/16/1996)

 67.0 78.0 126.0 171.0 405.0 1,910.0 2,970.0

95 0208726005 1989–92; 

1998–2012

2.1

 (12/18/1990)

89.4

(1.18)

3,400

 (6/14/2006)

 8.0 9.6 17.0 37.0 85.0 198.0 348.0

96 02087275 1998–2012 4.9

 (6/13/2002)

120

(1.23)

5,030

 (9/16/1999)

 12.0 15.0 25.0 51.0 112.0 265.0 458.0
74 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 97 02087324 1991–2012 1.9 (10/8/1994) 144 (1.19) 7,730 (9/6/1996) 16.0 20.0 36.0 68.0 138.0 313.0 512.0 98 0208732534 1997–2012 0 (6/24/2002) 0.41 (1.41) 22 (6/14/2006) 0.02 0.02 0.04 0.08 0.22 0.94 2.1 100 0208732885 1985–2012 0 (8/3/1999) 9.36 (1.37) 890 (9/6/1996) 0.81 1.2 1.9 3.2 6.2 18.0 38.0 101 0208735012 1997–2012 0 (10/6/1998) 2.14 (1.83) 194 (6/14/2006) 0.19 0.22 0.33 0.53 1.1 4.2 9.5 102 02087359 1997–2012 0.5 (8/8/2002) 35 (1.17) 3,600 (9/6/1996) 3.1 4.5 8.1 14.0 27.0 68.0 130.0 106 02087500 1984–2012 105 (9/16/1985) 1,010 (.88) 19,700 (9/17/1999) 227.0 253.0 302.0 450.0 1,060.0 2,850.0 3,830.0 108 02087580 2003–12 0 (8/3/2002) 23 (1.1) 1,180 (11/22/2006) 0.43 0.76 1.9 5.9 16.0 48.0 98.0 109 0208758850 1989–92; 1994–96; 1998–2012

0

 (7/28/2008)

34.8

(.97)

2,700

 (9/6/1996)

 0.12 0.51 4.5 14.0 29.0 69.0 121.0

112 02088000 1940–2012 0

 (10/11/1954)

90

(1.08)

6,660

 (6/15/2006)

 5.0 8.6 19.0 46.0 95.0 193.0 314.0

115 02088470 1965–89 0.18

 (10/6/1968)

188

(.98)

4,850

 (10/6/1964)

 8.8 15.0 33.0 92.0 220.0 467.0 694.0

116 02088500 1931–2012 0

 (8/12/2002)

244

(1.05)

17,600

 (9/17/1999)

 9.4 18.0 44.0 112.0 276.0 606.0 912.0

118 02089000 1984–91; 

1993; 

1996–2012

165

 (9/18/1985)

2,330

(.97)

38,200

 (9/20/1999)

 328.0 399.0 636.0 1,280.0 2,990.0 5,810.0 7,770.0

121 0208925200 1988–2012 5.6

 (9/25/2010)

70.3

(1.22)

8,000

 (9/16/1999)

 13.0 16.0 24.0 40.0 72.0 139.0 217.0

122 02089500 1984–95; 

1997–2012

200

 (9/20/1985)

2,590

(.96)

35,800

 (9/23/1999)

 421.0 510.0 787.0 1,470.0 3,360.0 6,280.0 8,420.0
Table 5 75

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

123 02090380 1977–94; 

1997–2012

0.05

 (7/29/1977)

148

(.92)

13,000

 (9/17/1999)

 6.7 11.0 21.0 57.0 154.0 356.0 577.0

124 02090500 1931–54 0.1

 (9/23/1954)

235

(1.)

4,510

 (1/31/1937)

 2.3 7.0 32.0 109.0 276.0 582.0 892.0

126 02090625 1969–87 0.06

 (9/17/1987)

2.23

(1.06)

116

 (11/6/1977)

 0.34 0.43 0.6 1.0 2.3 4.5 7.0

128 0209096970 1989–98 0.02

 (7/4/1998)

3.23

(1.07)

122

 (9/6/1996)

 0.23 0.32 0.73 1.5 3.0 6.4 11.0

129 02091000 1955–93; 

1995–2012

0.3

 (9/16/2010)

81.4

(1.01)

7,000

 (9/17/1999)

 6.4 10.0 20.0 43.0 87.0 168.0 272.0

130 02091500 1977–94; 

1997–2012

14

 (9/24/2010)

750

(1.02)

31,500

 (9/19/1999)

 53.0 72.0 157.0 405.0 952.0 1,800.0 2,610.0

131 02091700 1957–87 0.01

 (7/25/1977)

114

(1.22)

4,600

 (10/6/1964)

 1.9 3.6 10.0 38.0 122.0 312.0 497.0

140 02091970 1972–85 0

 (6/26/1971)

35.7

(1.32)

1,460

 (10/2/1971)

 0 0 0.45 10.0 39.0 92.0 147.0

141 02092000 1965–89 4.3

 (11/3/1983)

204

(1.12)

4,070

 (9/16/1984)

 9.9 13.0 28.0 85.0 228.0 503.0 795.0

144 02092500 1952–2012 0.18

 (8/27/2008)

189

(1.13)

12,000

 (9/17/1999)

 4.0 7.2 24.0 78.0 222.0 467.0 678.0

151 02093500 1929–71 0.6

 (10/8/1954)

152

(.9)

7,990

 (9/25/1947)

 22.0 30.0 53.0 94.0 163.0 311.0 451.0

152 02093800 1956–2012 0.42

 (8/25/2008)

23.2

(1.13)

1,250

 (7/28/1984)

 4.8 6.2 9.2 14.0 22.0 37.0 62.0

155 0209399200 2000–12 0.14

 (8/25/2002)

18.8

(1.18)

827

 (3/20/2003)

 1.6 2.5 4.6 8.0 15.0 36.0 66.0

158 02094500 1970–2012 0

 (9/9/2007)

92.3

(.7)

5,230

 (9/6/1996)

 3.9 5.4 9.5 20.0 60.0 234.0 435.0

159 02094659 2000–12 0.07

 (6/19/2008)

12

(1.64)

761

 (8/27/2008)

 0.46 0.69 1.3 2.4 5.6 24.0 55.0
76 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 160 02094770 1999; 2000–12 0.1 (8/14/2002) 22.9 (1.49) 1,640 (9/2/2000) 1.1 1.7 3.0 5.2 12.0 46.0 99.0 161 02094775 1999; 2000–12

0

 (8/6/2002)

5.11

(1.24)

393

 (9/15/2000)

 0.17 0.26 0.54 1.2 2.4 9.4 23.0

162 02095000 1999; 

2000–12

0.42

 (8/4/2002)

52

(1.53)

2,270

 (3/20/2003)

 2.6 3.7 6.4 12.0 28.0 104.0 227.0

164 02095181 2000–12 0

 (8/9/2002)

12.3

(1.29)

561

 (8/27/2008)

 0.55 0.98 1.8 3.3 6.3 25.0 57.0

166 02095500 1999; 

2000–12

8

 (6/7/2011)

56.6

(1.53)

1,930

 (3/20/2003)

 14.0 17.0 21.0 29.0 44.0 103.0 185.0

167 0209553650 1999; 

2000–12

28

 (8/20/2008)

156

(1.76)

4,680

 (11/12/2009)

 46.0 50.0 60.0 77.0 118.0 272.0 534.0

171 02096500 1973–2012 44

 (8/11/2002)

636

(1.05)

42,000

 (9/7/1996)

 87.0 106.0 161.0 288.0 585.0 1,370.0 2,310.0

172 02096700 1958–80 0.39

 (9/18/1968)

114

(.98)

4,690

 (3/14/1975)

 6.5 9.6 21.0 48.0 103.0 220.0 411.0

174 02096846 1990–2012 0

 (9/17/1990)

5.68

(.75)

516

 (3/4/1993)

 0 0.02 0.22 1.3 4.4 10.0 20.0

175 02096850 1960–73 0.09

 (9/23/1968)

30.9

(.92)

1,720

 (2/2/1973)

 1.3 2.2 4.8 12.0 26.0 57.0 110.0

178 02096960 1929–20112 0.18

 (9/10/1983)

1,200

(.94)

74,500 

(9/18/1945)

 100.0 146.0 260.0 567.0 1,170.0 2,540.0 4,300.0

183 02097314 1983–2012 0.39

 (12/30/1988)

92.5

(1.22)

6,300

 (9/6/1996)

 11.0 13.0 17.0 33.0 81.0 203.0 342.0

186 02097464 1990–2012 0

 (6/16/2002)

6.1

(.73)

737

 (9/6/1996)

 0.02 0.1 0.5 2.0 5.2 12.0 21.0

188 02097517 1984–2012 0.6

 (11/26/1982)

39.2

(.96)

2,600

 (9/6/1996)

 9.8 11.0 13.0 18.0 32.0 70.0 121.0

190 0209782609 2000–12 0

 (5/28/2002)

11.3

(.95)

1,240

 (6/14/2006)

 0 0.01 0.59 2.7 8.6 23.0 48.0
Table 5 77

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

192 02098500 1924–26; 

1929–58

0.6

 (9/1/1932)

31.5

(.98)

2,000

 (9/24/1947)

 4.2 5.3 8.3 14.0 24.0 52.0 105.0

193 02099000 1929–93; 

1998–2012

0.23

 (8/20/2008)

17.6

(1.19)

1,670

 (9/24/1947)

 2.9 3.5 4.7 7.1 12.0 27.0 55.0

196 02100500 1924–2012 0.7

 (11/29/1941)

347

(.99)

27,800

 (9/18/1945)

 26.0 37.0 69.0 149.0 304.0 668.0 1,240.0

197 02101000 1940–71 0

 (10/23/1941)

144

(1.05)

18,800

 (7/20/1956)

 5.0 9.7 23.0 58.0 125.0 271.0 484.0

200 0210166029 1989–2012 0

 (8/20/1988)

6.74

(.91)

531

 (9/6/1996)

 0.17 0.28 0.74 2.0 4.7 12.0 27.0

202 02101800 1959–81; 

1995–2012

0

 (9/2/1962)

13.1

(.85)

1,570

 (9/6/1996)

 0.01 0.05 0.63 3.1 9.0 23.0 46.0

203 02102000 1931–2012 6

 (10/9/1954)

1,390

(.97)

66,400

 (9/18/1945)

 65.0 95.0 206.0 510.0 1,230.0 3,160.0 6,160.0

205 02102192 1984–2012 0

 (8/13/2009)

48.6

(.64)

1,940

 (9/6/1996)

 0.2 0.45 1.2 7.8 52.0 142.0 231.0

208 02102908 1969–2012 0.94

 (8/13/2002)

11.3

(1.48)

278

 (9/6/2008)

 4.1 5.0 6.7 9.2 13.0 19.0 25.0

209 02103000 1939–50; 

2003–12

19

 (8/11/2002)

388

(1.11)

9,000

 (9/18/1945)

 51.0 73.0 137.0 277.0 487.0 832.0 1,080.0

210 02103500 1930–71 31

 (8/1/1940)

557

(1.21)

13,000

 (9/18/1945)

 82.0 109.0 195.0 382.0 712.0 1,220.0 1,590.0

212 02104220 1989–2012 20

 (7/22/2002)

110

(1.18)

1,270

 (9/7/2008)

 43.0 51.0 67.0 92.0 131.0 185.0 233.0

214 02104500 1930–31; 

1940–54

2.8

 (11/23/1941)

377

(1.29)

6,980

 (9/18/1945)

 51.0 113.0 223.0 337.0 466.0 640.0 800.0

218 02105900 1957–73; 

1994–2010

0

 (9/10/1997)

34.7

(1.61)

3,000

 (9/16/1999)

 0.4 1.3 4.8 14.0 34.0 76.0 122.0

219 02106000 1951–91 0.1

 (9/12/1954)

115

(1.24)

2,820

 (10/7/1964)

 6.9 12.0 28.0 70.0 152.0 266.0 353.0
78 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 220 02106500 1952–2012 7 (7/23/2011) 774 (1.14) 27,300 (9/18/1999) 64.0 101.0 227.0 495.0 1,010.0 1,720.0 2,300.0 222 02107000 1952–86 0.1 (10/3/1954) 415 (1.09) 5,900 (10/10/1964) 13.0 25.0 85.0 260.0 581.0 1,010.0 1,310.0 223 02107500 1951–71 0 (10/27/1951) 113 (1.05) 1,010 (8/18/1971) 0.8 3.2 21.0 74.0 167.0 273.0 338.0 225 02107600 1959–75 3.2 (10/4/1968) 63.3 (1.33) 2,100 (10/6/1964) 8.8 12.0 19.0 38.0 77.0 130.0 186.0 233 02108000 1941–2012 2.9 (7/18/2011) 708 (1.18) 29,900 (9/18/1999) 30.0 55.0 145.0 396.0 891.0 1,660.0 2,340.0 234 02108500 1956–81 0.5 (8/9/1955) 94.9 (1.37) 4,000 (11/7/1977) 5.1 7.2 15.0 39.0 108.0 231.0 356.0 235 02108548 1977–92 0 (6/19/1978) 9.71 (1.24) 354 (8/17/1992) 0.11 0.21 0.68 3.2 9.4 23.0 39.0 237 02109500 1940–2012 0.1 (8/30/1954) 704 (1.04) 30,600 (9/21/1999) 10.0 25.0 93.0 342.0 881.0 1,840.0 2,590.0 238 02111000 1940–2012 3.6 (9/12/2002) 48.9 (1.7) 2,130 (8/13/1940) 12.0 16.0 23.0 36.0 56.0 86.0 119.0 239 02111180 1966–2012 5.5 (8/24/2008) 94.6 (1.86) 5,890 (8/17/1994) 21.0 26.0 41.0 66.0 104.0 165.0 234.0 241 02111500 1940–2012 13 (8/14/2002) 138 (1.55) 7,600 (8/14/1940) 45.0 55.0 75.0 108.0 156.0 225.0 301.0 242 02112000 1963–2012 114 (12/8/1970) 807 (1.6) 7,990 (8/10/1970) 256.0 315.0 441.0 616.0 921.0 1,390.0 1,970.0 243 02112120 1965–2012 13 (8/12/2008) 181 (1.41) 7,460 (8/17/1994) 55.0 70.0 96.0 139.0 204.0 300.0 400.0 244 02112250 1965–2012 184 (7/17/2008) 1,310 (1.51) 21,500 (8/10/1970) 447.0 550.0 735.0 1,020.0 1,480.0 2,220.0 3,200.0

245 02112360 1965–2012 14

 (8/21/2008)

124

(1.57)

3,260

 (8/10/1970)

 43.0 52.0 72.0 100.0 140.0 197.0 258.0
Table 5 79

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

246 02112500 1921–32 17

 (8/30/1925)

160

(1.38)

5,550

 (8/16/1928)

 43.0 54.0 85.0 127.0 173.0 242.0 320.0

247 02113000 1932–2010 11

 (9/12/2002)

180

(1.41)

12,100

 (9/22/1979)

 52.0 65.0 92.0 134.0 191.0 286.0 405.0

251 02113850 1965–2012 13

 (8/19/1999)

308

(1.33)

13,600

 (9/22/1979)

 93.0 119.0 164.0 236.0 346.0 500.0 680.0

253 02114450 1961–2012 1.4

 (8/21/2002)

44.7

(1.04)

3,350

 (6/21/1972)

 8.0 11.0 17.0 25.0 40.0 72.0 122.0

254 02115360 1965–2012 221

 (8/23/2008)

2,390

(1.41)

48,400

 (9/22/1979)

 764.0 952.0 1,300.0 1,850.0 2,680.0 4,050.0 5,640.0

255 02115500 1941–71 0.6

 (8/16/1956)

22.8

(1.03)

1,650

 (8/10/1970)

 5.3 6.8 9.7 14.0 21.0 35.0 55.0

261 02115856 1972–82 12

 (9/4/1977)

71.3

(1.09)

2,730

 (6/21/1972)

 18.0 21.0 27.0 37.0 60.0 120.0 228.0

262 02115860 1965–79; 

1989–91; 

2008–10

35

 (10/6/1968)

235

(1.26)

8,130

 (6/22/1972)

 69.0 80.0 105.0 144.0 211.0 375.0 653.0

264 02116500 1963–96; 

1999–2012

236

 (8/12/2002)

2,930

(1.29)

66,000

 (6/22/1972)

 926.0 1,150.0 1,570.0 2,200.0 3,210.0 5,030.0 7,100.0

265 02117030 1969–83 0.09

 (7/25/1977)

1.04

(.99)

51

 (6/21/1972)

 0.19 0.24 0.4 0.62 0.93 1.6 2.5

266 02117500 1941–71 8.8

 (8/17/1956)

112

(1.11)

4,740

 (9/18/1945)

 36.0 42.0 56.0 81.0 117.0 180.0 258.0

267 02118000 1939–96; 

1998–2012

3

 (8/13/2002)

332

(1.08)

11,800

 (3/21/2003)

 84.0 107.0 156.0 229.0 347.0 570.0 869.0

268 02118500 1952–2012 5.4

 (9/13/2002)

197

(1.27)

10,400

 (9/22/1979)

 52.0 65.0 93.0 137.0 210.0 324.0 459.0

269 02119000 1929–65 23

 (10/12/1941)

639

(1.12)

14,000

 (10/18/1964)

 171.0 211.0 297.0 440.0 654.0 1,140.0 1,780.0

270 02119400 1957–69 0

 (5/10/1956)

6.44

(1.33)

75

 (10/17/1964)

 2.4 2.7 3.2 4.3 6.3 10.0 15.0
80 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 271 02120500 1941–71 10 (9/18/1956) 90.5 (1.04) 2,500 (9/19/1945) 26.0 31.0 42.0 60.0 89.0 148.0 233.0 272 02120780 1980–2012 1 (9/30/2007) 98.6 (.84) 5,280 (8/28/1995) 9.8 16.0 32.0 59.0 96.0 159.0 257.0 274 02121180 1980–90 0.64 (8/19/1988) 9.69 (1.01) 568 (5/28/1990) 1.8 2.3 3.5 5.2 8.6 15.0 25.0 276 02121500 1989–2012 2.7 (9/4/1990) 172 (.99) 8,000 (9/23/2003) 11.0 16.0 32.0 73.0 149.0 319.0 600.0 279 02123500 1939–71 0.5 (10/13/1941) 324 (.95) 20,000 (9/18/1945) 17.0 26.0 53.0 124.0 280.0 635.0 1,270.0 280 02123567 1982–83; 1986–2004

0

 (6/22/2002)

3.48

(1.01)

206

 (4/21/1992)

 0.17 0.31 0.79 1.7 3.1 5.9 10.0

283 0212414900 1996–2012 0.01

 (8/13/2002)

38.6

(1.12)

3,710

 (8/27/2008)

 2.1 3.1 6.1 12.0 25.0 66.0 147.0

296 02124692 2001–12 0

 (8/12/2002)

17.3

(.72)

2,000

 (11/22/2006)

 0.23 0.47 1.3 3.4 8.9 27.0 60.0

298 02125000 1955–2010 0

 (9/12/1954)

57.2

(1.03)

5,240

 (10/11/1990)

 0.05 0.37 2.2 11.0 39.0 113.0 229.0

304 02126000 1930–2012 19

 (10/28/1931)

1,310

(.95)

85,600

 (9/18/1945)

 84.0 104.0 171.0 392.0 1,010.0 2,800.0 5,510.0

306 02127000 1938–71 0

 (10/10/1938)

89.5

(.81)

12,100

 (9/18/1945)

 0.01 0.16 1.3 11.0 59.0 248.0 467.0

308 02128000 1955–2012 0

 (8/12/2002)

106

(1.)

9,800

 (7/23/1997)

 4.1 7.5 19.0 47.0 92.0 185.0 355.0

309 02129000 1928–2012 58

 (12/2/1951)

7,770

(1.13)

242,000

 (9/18/1945)

 715.0 1,440.0 3,280.0 5,450.0 9,200.0 14,000.0 21,300.0

312 02132320 1988–2012 1

 (8/14/2002)

89.6

(1.08)

1,150

 (10/20/1999)

 19.0 26.0 43.0 69.0 112.0 168.0 224.0

313 02133500 1940–2012 0

 (8/14/2002)

239

(1.31)

8,530

 (9/18/1945)

 47.0 67.0 112.0 191.0 314.0 465.0 570.0
Table 5 81

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

314 02133624 1988–2012 28

 (8/13/2002)

430

(1.18)

3,070

 (3/22/1998)

 107.0 137.0 205.0 355.0 564.0 820.0 1,040.0

315 02134170 2001–12 51

 (8/13/2002)

649

(.92)

7,030

 (9/11/2004)

 112.0 162.0 258.0 505.0 877.0 1,280.0 1,640.0

316 02134480 1986–2012 0

 (8/31/1993)

200

(.87)

3,300

 (9/17/1999)

 3.2 10.0 40.0 120.0 268.0 448.0 614.0

317 02134500 1930–2010; 

2012

42

 (8/14/2002)

1,290

(1.05)

13,400

 (9/24/1945)

 208.0 283.0 481.0 935.0 1,670.0 2,760.0 3,570.0

318 02137000 1961–75 7.5

 (10/20/1963)

42.4

(2.06)

687

 (2/13/1966)

 13.0 17.0 23.0 33.0 48.0 71.0 93.0

319 02137727 1981–2012 12

 (8/23/2008)

229

(1.82)

15,100

 (9/8/2004)

 59.0 72.0 107.0 167.0 261.0 402.0 555.0

320 02138000 1942–81 29

 (9/30/1954)

348

(2.02)

8,060

 (8/28/1949)

 98.0 123.0 183.0 270.0 393.0 585.0 798.0

321 02138500 1923–2012 8

 (9/7/1925)

150

(2.25)

16,600

 (9/8/2004)

 29.0 38.0 60.0 99.0 160.0 265.0 385.0

324 0213903612 1992–2009 36

 (9/12/2002)

847

(1.67)

34,700

 (9/9/2004)

 194.0 247.0 357.0 608.0 1,100.0 1,700.0 2,290.0

328 02140991 1986–2012 19

 (9/13/2002)

349

(1.74)

19,400

 (9/8/2004)

 87.0 103.0 156.0 250.0 395.0 612.0 824.0

329 02141150 1967–78 7.7

 (7/17/1970)

42.5

(1.49)

2,210

 (8/10/1970)

 13.0 16.0 21.0 28.0 41.0 63.0 99.0

333 02142000 1954–95; 

1998–2012

1.5

 (9/12/2002)

36.5

(1.29)

2,270

 (8/10/1970)

 7.8 10.0 16.0 25.0 39.0 64.0 90.0

334 02142500 1936–62 89

 (9/15/1957)

2,210

(1.44)

101,000

 (8/14/1940)

 167.0 252.0 1,030.0 1,970.0 3,000.0 4,150.0 4,790.0

336 0214253830 1985–2006 0.48

 (8/10/2002)

7.93

(1.1)

550

 (3/20/2003)

 1.7 2.3 3.6 5.1 7.4 11.0 17.0

341 0214266000 1998–2012 0.59

 (9/25/1999)

25.8

(.98)

2,050

 (8/27/2008)

 2.7 3.4 5.6 10.0 20.0 47.0 93.0
82 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 345 02142900 1966–86; 1988–2012 0.03 (8/14/2002) 18.5 (1.13) 1,600 (10/9/1976) 1.3 1.8 3.0 6.3 13.0 31.0 60.0 347 0214291555 1999; 2000–12

0

 (8/23/2008)

31.2

(.99)

2,920

 (8/27/2008)

 1.5 2.6 4.9 9.8 19.0 51.0 107.0

348 0214295600 1995–2012 0.06

 (10/30/2001)

9.92

(.95)

835

 (7/23/1997)

 0.59 0.85 1.6 3.3 7.1 18.0 39.0

350 02143000 1926–31; 

1943–2012

4

 (11/15/1942)

129

(1.55)

10,100

 (10/2/1929)

 29.0 39.0 59.0 90.0 138.0 214.0 310.0

351 02143040 1962–2012 0.87

 (8/13/2002)

47

(1.83)

2,450

 (9/8/2004)

 9.2 12.0 19.0 31.0 50.0 83.0 125.0

352 02143500 1964–2012 0.32

 (8/12/2002)

82.6

(1.19)

4,350

 (8/10/1970)

 13.0 19.0 31.0 52.0 84.0 139.0 213.0

355 02144000 1954–2012 0.05

 (8/14/2002)

32.2

(1.01)

2,940

 (10/16/1971)

 2.9 5.0 9.8 19.0 32.0 53.0 82.0

356 02145000 1943–71; 

1984–96; 

1998–2012

25

 (8/15/2002)

774

(1.23)

21,700

 (8/11/1970)

 193.0 249.0 359.0 546.0 820.0 1,330.0 2,060.0

359 02146211 1982–94; 

1999–2001; 

2005–12

0.16

 (8/1/1986)

6.99

(1.17)

800

 (8/5/2011)

 0.47 0.64 1.1 2.1 4.5 13.0 27.0

360 0214627970 2001–12 2.1

 (9/13/2011)

15.7

(1.73)

1,110

 (8/5/2011)

 4.7 5.3 6.4 8.0 11.0 23.0 46.0

362 02146300 1963–2005; 

2007–12

3.1

 (9/25/1983)

43.9

(1.43)

5,010

 (7/23/1997)

 7.2 8.8 12.0 18.0 32.0 79.0 160.0

363 02146315 1999; 

2000–12

0.01

 (8/8/2002)

5.64

(.99)

388

 (5/22/2003)

 0.21 0.3 0.62 1.3 2.9 10.0 26.0

364 02146348 1999; 

2000–12

0.05

 (8/28/2001)

9.82

(1.07)

626

 (5/22/2003)

 0.41 0.67 1.3 2.6 5.9 19.0 43.0

366 02146381 1995–2012 17

 (11/11/2007)

92.5

(1.42)

4,790

 (7/23/1997)

 24.0 26.0 32.0 43.0 70.0 156.0 291.0
Table 5 83

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

367 02146409 1995–2012 1

 (8/11/2002)

19.2

(1.63)

1,970

 (7/23/1997)

 2.4 2.7 3.7 5.4 9.6 38.0 88.0

368 0214642825 1999; 

2000–12

0

 (8/17/1999)

5.1

(.98)

677

 (8/27/2008)

 0.05 0.21 0.65 1.6 3.1 8.3 16.0

372 0214645022 1997–2012 0.18

 (8/14/2002)

22.5

(1.18)

2,610

 (7/23/1997)

 1.5 2.1 3.5 6.1 13.0 41.0 92.0

375 02146470 1984–90; 

1995–2012

0

 (7/14/1986)

3.11

(1.18)

282

 (7/23/1997)

 0.13 0.22 0.43 0.81 1.6 5.8 14.0

378 02146507 1978–2012 15

 (9/20/1981)

82.2

(1.93)

6,160

 (7/23/1997)

 23.0 26.0 30.0 38.0 56.0 142.0 289.0

379 02146530 1998–2012 20

 (6/5/2008)

86.2

(1.75)

6,780

 (7/23/1997)

 26.0 28.0 32.0 39.0 59.0 161.0 294.0

380 0214655255 2000–12 0

 (7/10/2002)

6.61

(.9)

654

 (6/7/2003)

 0.19 0.38 0.84 1.9 4.0 11.0 23.0

381 02146562 2000–12 0

 (8/8/2002)

5.54

(.97)

439

 (6/7/2003)

 0.13 0.26 0.7 1.4 3.1 11.0 23.0

383 0214657975 2000–12 0

 (8/13/2002)

6.45

(.77)

544

 (9/28/2004)

 0.11 0.23 0.69 1.7 3.5 8.3 20.0

384 02146600 1963–2012 0.01

 (8/14/2002)

42.9

(1.11)

4,490

 (8/27/1995)

 2.4 3.4 6.2 12.0 27.0 74.0 167.0

388 02146750 1975–2012 0.3

 (10/13/2007)

124

(1.34)

7,740

 (8/27/1995)

 5.0 7.8 15.0 30.0 67.0 240.0 612.0

391 0214678175 1999; 

2000–12

0.05

 (8/20/2001)

7.14

(1.03)

519

 (3/20/2003)

 0.24 0.35 0.64 1.4 3.8 12.0 28.0

394 02146900 1961–2003 0

 (10/6/1968)

72.7

(.95)

6,700

 (8/27/1995)

 1.1 2.3 6.0 18.0 46.0 131.0 305.0

396 02148500 1928–58 0.8

 (9/13/1928)

169

(1.74)

12,000

 (8/16/1928)

 4.2 6.8 78.0 145.0 226.0 335.0 445.0

397 02149000 1952–2012 8.1

 (8/14/2002)

131

(1.66)

4,340

 (9/8/2004)

 37.0 45.0 69.0 100.0 146.0 220.0 298.0
84 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 399 02150000 1941–54 25 (7/6/1940) 387 (2.22) 6,000 (10/7/1949) 55.0 71.0 205.0 324.0 465.0 698.0 900.0 400 02150495 1999; 2000–12 6.6 (9/12/2002) 95.1 (1.1) 3,320 (9/8/2004) 24.0 29.0 42.0 66.0 107.0 162.0 228.0 401 02151000 1926–96 6 (6/9/1940) 313 (1.42) 13,200 (8/16/1928) 93.0 116.0 160.0 229.0 333.0 510.0 740.0 402 02151500 1926–2012 83 (9/13/2002) 1,450 (1.66) 63,900 (8/16/1928) 414.0 525.0 778.0 1,130.0 1,650.0 2,440.0 3,300.0 404 02152100 1960–2012 3.9 (8/15/2002) 86.3 (1.43) 5,870 (9/8/2004) 21.0 28.0 41.0 60.0 92.0 143.0 208.0 407 02152500 1941–71 17 (8/11/1956) 278 (1.39) 19,900 (8/14/1940) 83.0 101.0 133.0 189.0 281.0 452.0 678.0 408 02152610 1969–87 0 (7/18/1986) 2.07 (1.44) 94 (10/16/1971) 0.34 0.46 0.77 1.3 2.0 3.0 5.3 409 03161000 1925–26; 1929–86; 1988–2012 65 (9/9/1925) 424 (2.07) 27,700 (8/14/1940) 141.0 167.0 235.0 342.0 495.0 700.0 920.0 411 03162500 1909–16; 1929–58 53 (9/19/1932) 472 (1.7) 36,000 (8/14/1940) 114.0 144.0 213.0 340.0 541.0 874.0 1,220.0 412 03439000 1908; 1936–2012 33 (8/21/2007) 235 (3.46) 5,630 (10/4/1964) 72.0 85.0 122.0 188.0 279.0 409.0 536.0 413 03439500 1925–55 54 (9/17/1925) 344 (3.34) 5,980 (8/13/1940) 106.0 128.0 183.0 277.0 412.0 590.0 778.0 414 03440000 1945–55; 1988–2004 4.7 (9/11/2002) 35.8 (3.06) 814 (8/17/1994) 10.0 13.0 19.0 29.0 43.0 62.0 80.0 416 03441000 1921–90; 1994–2012 14 (9/28/1954) 128 (3.17) 3,940 (9/8/2004) 34.0 42.0 62.0 99.0 151.0 227.0 303.0 417 03441440 1963–90 8.1

 (10/3/1981)

104

(3.88)

2,840

 (10/4/1964)

 26.0 32.0 51.0 80.0 123.0 185.0 253.0

418 03441500 1943–55 0.3

 (10/24/1943)

146

(3.53)

2,310

 (3/11/1952)

 25.0 45.0 68.0 125.0 172.0 255.0 345.0
Table 5 85

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

419 03442000 1943–55 4.8

 (9/29/1954)

28.4

(2.61)

422

 (12/7/1950)

 9.1 11.0 15.0 23.0 34.0 48.0 63.0

420 03443000 1921–2012 120

 (8/12/2008)

978

(3.3)

22,700

 (10/5/1964)

 282.0 348.0 521.0 794.0 1,150.0 1,700.0 2,300.0

421 03444000 1943–55 5.7

 (9/29/1954)

32.8

(2.22)

479

 (12/7/1950)

 10.0 13.0 18.0 26.0 38.0 54.0 72.0

422 03444500 1927–49; 

1966–73

1.9

 (9/1/1930)

32.2

(3.22)

900

 (8/13/1940)

 6.7 8.9 14.0 24.0 37.0 59.0 83.0

425 03446000 1925–26; 

1935–2012

18

 (9/30/1954)

167

(2.5)

4,470

 (8/13/1940)

 43.0 54.0 82.0 133.0 203.0 300.0 392.0

427 03447000 1939–55 25

 (9/28/1954)

196

(1.8)

4,950

 (8/14/1940)

 59.0 70.0 96.0 141.0 216.0 328.0 484.0

428 03447500 1943–58 10

 (9/17/1953)

73.7

(1.17)

1,850

 (4/5/1957)

 19.0 24.0 34.0 55.0 85.0 126.0 174.0

429 03447687 2002–12 153

 (8/12/2008)

1,490

(2.33)

23,800

 (9/9/2004)

 370.0 476.0 741.0 1,160.0 1,760.0 2,630.0 3,690.0

432 03448000 1935–86 171

 (7/21/1986)

1,690

(2.5)

28,800

 (10/5/1964)

 538.0 645.0 920.0 1,360.0 1,930.0 2,930.0 4,130.0

433 03448500 1943–77 14

 (9/1/1953)

96.1

(1.2)

2,150

 (6/16/1949)

 30.0 38.0 50.0 77.0 113.0 160.0 206.0

435 0344894205 1990–2012 1.4

 (8/22/2008)

40

(2.76)

2,310

 (9/8/2004)

 4.5 6.5 14.0 28.0 47.0 77.0 105.0

437 03449000 1927–53 0.7

 (7/20/1926)

49.4

(2.08)

3,820

 (8/13/1940)

 3.6 5.0 12.0 31.0 59.0 98.0 138.0

439 03450000 1927–75; 

1980–81; 

1986–2012

0.3

 (9/30/1954)

10.6

(1.94)

528

 (8/13/1940)

 1.2 1.6 3.4 7.4 13.0 22.0 30.0

441 03451000 1960–2012 4.9

 (9/13/2002)

157

(1.21)

10,200

 (9/8/2004)

 29.0 38.0 59.0 103.0 184.0 309.0 427.0

443 03451500 1896–2012 174

 (8/12/2008)

2,070

(2.19)

66,000

 (7/16/1916)

 612.0 753.0 1,090.0 1,610.0 2,390.0 3,600.0 5,100.0
86 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 446 03452000 1943–55 4.7 (9/2/1953) 58 (.73) 2,650 (2/10/1946) 13.0 16.0 23.0 39.0 63.0 107.0 156.0 448 03453000 1935–73; 1995–2012 4.9 (8/25/2008) 149 (.94) 8,010 (3/12/1963) 27.0 34.0 53.0 95.0 171.0 292.0 418.0 449 03453500 1943–2012 195 (8/12/2008) 2,420 (1.82) 32,400 (9/8/2004) 710.0 865.0 1,260.0 1,920.0 2,860.0 4,330.0 5,840.0 450 03454000 1935–71 19 (9/2/1953) 184 (1.46) 6,240 (3/12/1963) 36.0 45.0 68.0 121.0 212.0 356.0 520.0 451 03454500 1935–49 454 (10/14/1941) 2,610 (1.67) 49,900 (8/30/1940) 828.0 961.0 1,330.0 1,930.0 3,020.0 4,710.0 6,640.0 452 03455500 1955–2012 9.6 (8/22/2008) 99.9 (3.62) 4,500 (2/13/1966) 21.0 26.0 41.0 70.0 113.0 182.0 263.0 453 0345577330 1989–2012 15 (9/27/1998) 115 (3.43) 3,630 (9/8/2004) 24.0 30.0 47.0 81.0 133.0 214.0 308.0 454 03456000 1955–80 7.9 (9/7/1954) 167 (3.02) 3,270 (2/13/1966) 40.0 46.0 70.0 123.0 198.0 313.0 418.0 455 03456100 1982–2012 9.2 (9/2/1986) 155 (2.65) 5,720 (9/17/2004) 35.0 43.0 64.0 109.0 182.0 294.0 401.0 457 03456500 1955–2012 11 (8/12/2008) 140 (2.72) 6,200 (9/8/2004) 28.0 35.0 56.0 99.0 163.0 261.0 370.0 458 03456991 1933–83; 1985–2012 27 (9/7/1954) 320 (2.46) 19,800 (9/8/2004) 70.0 84.0 132.0 228.0 376.0 600.0 827.0 460 03457500 1950–72 2 (10/6/1970) 34.9 (2.42) 596 (1/31/1957) 7.5 9.3 15.0 27.0 44.0 66.0 86.0 462 03459000 1931–72 23 (9/17/1953) 129 (1.98) 2,040 (3/26/1965) 36.0 43.0 59.0 96.0 159.0 241.0 317.0 463 03459500 1933–2012 64 (8/23/2008) 667 (1.91) 23,900 (9/8/2004) 168.0 203.0 306.0 498.0 795.0 1,220.0 1,650.0

464 03460000 1935–52; 

1963–2012

12

 (1/2/1940)

110

(2.24)

2,690

 (3/16/1973)

 28.0 34.0 49.0 82.0 130.0 202.0 277.0
Table 5 87

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

466 03460795 1998–2012 74

 (11/19/2000)

973

(1.81)

22,500

 (9/8/2004)

 150.0 180.0 419.0 752.0 1,290.0 1,890.0 2,450.0

467 03462000 1939–57 28

 (9/16/1956)

187

(1.8)

8,350

 (8/13/1940)

 48.0 60.0 88.0 142.0 224.0 332.0 438.0

469 03463300 1958–2012 8.3

 (9/25/2010)

141

(3.26)

9,960

 (11/6/1977)

 25.0 35.0 59.0 97.0 157.0 255.0 360.0

470 03463500 1935–52 12

 (6/21/1941)

176

(2.89)

11,800

 (8/13/1940)

 35.0 48.0 75.0 121.0 192.0 310.0 448.0

471 03464000 1935–71 27

 (9/14/1953)

248

(1.58)

10,200

 (8/13/1940)

 58.0 72.0 108.0 175.0 290.0 460.0 642.0

472 03464500 1926–55 96

 (9/7/1925)

1,010

(1.66)

33,200

 (8/13/1940)

 250.0 308.0 466.0 761.0 1,200.0 1,820.0 2,520.0

473 03479000 1941–2012 8.1

 (9/13/2002)

175

(1.9)

15,900

 (8/13/1940)

 30.0 39.0 66.0 115.0 195.0 319.0 463.0

475 03481000 1935–55 6.1

 (9/8/1954)

81.5

(1.94)

5,000

 (8/13/1940)

 14.0 18.0 31.0 57.0 95.0 156.0 216.0

476 03500000 1945–2012 37

 (8/22/2008)

379

(2.71)

7,830

 (9/17/2004)

 104.0 124.0 185.0 300.0 470.0 685.0 881.0

477 03500240 1962–2012 14

 (8/22/2008)

138

(2.42)

3,340

 (9/17/2004)

 35.0 44.0 65.0 104.0 167.0 252.0 333.0

478 03500500 1932–67 0.2

 (10/13/1947)

59.9

(4.02)

1,790

 (8/13/1940)

 12.0 17.0 24.0 43.0 71.0 114.0 161.0

480 03501000 1927–67 28

 (10/16/1954)

222

(2.57)

7,340

 (10/4/1964)

 54.0 67.0 99.0 164.0 268.0 416.0 564.0

482 03502000 1930–45 31

 (11/26/1933)

736

(2.28)

12,300

 (8/30/1940)

 227.0 263.0 366.0 556.0 875.0 1,340.0 1,830.0

484 03503000 1945–81; 

1984–2012

71

 (11/7/1954)

1,030

(2.36)

17,200

 (10/5/1964)

 285.0 347.0 505.0 794.0 1,240.0 1,870.0 2,470.0

486 03504000 1941–2012 27

 (8/22/2008)

202

(3.89)

3,620

 (9/17/2004)

 54.0 66.0 100.0 162.0 250.0 367.0 473.0
88 Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record Streamgaging Stations Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued [USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge] Site index number (figs. 4, 5) USGS station number Period of analysis (full water years only) Minimum daily discharge, in ft3/s (date) Mean daily discharge, in ft3/s (Unit flow, in [(ft3/s)/mi2]) Maximum daily discharge in ft3/s (date) Duration of daily mean flow, presented as XXth percentiles, percentage of discharges equal or less than indicated value for XX percent of time, in ft3/s 5th percentile 10th percentile 25th percentile 50th percentile (median) 75th percentile 90th percentile 95th percentile 488 03505550 1943–81; 2006–113 17 (11/8/1952) 486 (3.35) 5,140 (3/30/1975) 64.0 121.0 296.0 475.0 655.0 779.0 863.0 489 03506500 1913–17; 1921–43 70 (1/2/1940) 509 (2.93) 15,200 (3/4/1917) 135.0 170.0 235.0 390.0 638.0 920.0 1,220.0 490 03507000 1913–44 192 (9/21/1925) 1,590 (2.39) 30,000 (3/4/1917) 468.0 578.0 797.0 1,230.0 1,930.0 2,860.0 3,800.0 492 03508050 1935–76; 2005–114 6.6 (10/7/1956) 407 (2.77) 15,300 (8/30/1940) 81.0 123.0 208.0 348.0 528.0 736.0 876.0 495 03509000 1942–75; 1994–95 22 (9/19/1954) 116 (2.27) 1,590 (3/12/1963) 37.0 43.0 58.0 94.0 142.0 206.0 264.0 496 03509500 1929–41 20 (1/20/1940) 105 (1.91) 1,190 (8/30/1940) 30.0 36.0 54.0 80.0 125.0 197.0 265.0 498 03510577 1934–81; 2005–115 105 (10/16/2008) 811 (2.25) 22,500 (8/30/1940) 259.0 324.0 455.0 670.0 1,010.0 1,410.0 1,730.0 499 03511000 1922–49 56 (9/9/1925) 382 (2.92) 6,490 (1/21/1922) 96.0 118.0 174.0 286.0 466.0 712.0 975.0 500 03512000 1946; 1949–2012 65 (10/16/2007) 513 (2.79) 8,470 (3/12/1963) 138.0 166.0 243.0 394.0 608.0 926.0 1,250.0 501 03513000 1942–81; 1984–94; 1997–2012 217 (10/16/2008) 1,570 (2.4) 23,500 (9/17/2004) 511.0 612.0 836.0 1,270.0 1,930.0 2,780.0 3,500.0 502 03513500 1936–71 4.5 (10/23/1939) 44.9 (3.25) 923 (1/31/1957) 9.4 12.0 19.0 32.0 53.0 86.0 120.0 509 03546000 1923; 1943– 45; 1947–55 12 (9/19/1954) 88.3 (2.35) 2,080 (6/16/1949) 19.0 23.0 36.0 67.0 112.0 170.0 226.0 513 03548500 1942–2004 62 (10/19/1952) 896 (2.21) 11,600 (2/16/1990) 168.0 232.0 430.0 784.0 1,180.0 1,620.0 2,020.0 514 03550000 1905–09; 

1915–16; 

1920–2012

12

 (8/27/1925)

252

(2.42)

8,190

 (2/16/1995)

 46.0 58.0 93.0 175.0 306.0 489.0 689.0
Table 5 89

Table 5. Minimum, mean, maximum, and flow-duration statistics of daily mean discharges for indicated periods of record at selected U.S. Geological Survey continuous-record streamgaging stations in North Carolina.—Continued[USGS, U.S. Geological Survey; ft3/s, cubic foot per second. Water year is the annual period used in flow-duration analyses in this report and lasts from October 1 through September 30, designated by the year 

in which the period ends. Flows are listed for selected non-exceedance percentiles indicating percentage of time flow was equal to or less than indicated discharge]

Site

index

number

(figs. 

4, 5)

USGS

station

number

Period of

analysis

(full water 

years only)

Minimum

daily

discharge,

in ft3/s

(date)

Mean daily

discharge,

in ft3/s

(Unit flow,

in [(ft3/s)/mi2])

Maximum

daily

discharge

in ft3/s

(date)

Duration of daily mean flow, presented as XXth percentiles, percentage of discharges

equal or less than indicated value for XX percent of time, in ft3/s

5th

percentile

10th

percentile

25th

percentile

50th

percentile

(median)

75th

percentile

90th

percentile

95th

percentile

515 03554000 1902–05; 

1915–16; 1920–29; 

1933–41

41

 (9/6/1925)

513

(1.89)

14,100

 (2/28/1902)

 145.0 174.0 237.0 377.0 595.0 920.0 1,260.0

1The period of analysis was based on combined daily mean discharges at station 02085220 (site 78, 1962–87 water years) and station 0208521324 (site 77, active streamgage since October 1987).2The period of analysis was based on combined daily mean discharges at station 02096960 (site 178, active streamgage since October 1973) and station 02097000 (site 179, 1928–73 water years).3The period of analysis was based on combined daily mean discharges at station 03505500 (site 487, 1942–81 water years) and station 03505550 (site 488, active streamgage since December 2004).4The period of analysis was based on combined daily mean discharges at station 03508000 (site 491, 1934–76 water years) and station 03508050 (site 492, active streamgage since September 2004).5The period of analysis was based on combined daily mean discharges at station 03510500 (site 497, 1933–81 water years) and station 03510577 (site 498, active streamgage since July 2004).
For further information about this publication contact:

Director

U.S. Geological Survey

South Atlantic Water Science Center

North Carolina–South Carolina–Georgia

3916 Sunset Ridge Road

Raleigh, NC 27607

http://nc.water.usgs.gov/

Prepared by the Raleigh Publishing Service Center

Weaver—Low-Flow Characteristics and Flow-Duration Statistics for Selected USGS Continuous-Record—Scientific Investigations Report 2015–5001

ISSN 2328-0328 (online)

http://dx.doi.org/10.3133/sir20155001