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Estimating Annual High-Flow Statistics and 

Monthly and Seasonal Low-Flow Statistics for 

Ungaged Sites on Streams in Alaska and 

Conterminous Basins in Canada

By Jeffrey B. Wiley and Janet H. Curran

Anchorage, Alaska

2003

Water-Resources Investigations Report 03-4114

U.S. GEOLOGICAL SURVEY

Prepared in cooperation with the

ALASKA DEPARTMENT OF TRANSPORTATION AND 

PUBLIC FACILITIES
U.S. DEPARTMENT OF THE INTERIOR

GALE A. NORTON, Secretary

U.S. GEOLOGICAL SURVEY

Charles G. Groat, Director

Any use of trade, product, or firm names in this publication is for descriptive purposes only and does 

not imply endorsement by the U.S. Government.

For additional information write to:

Chief, Water Resources Office

U.S. Geological Survey

Alaska Science Center

4230 University Drive, Suite 201

Anchorage, AK 99508-4664

http://alaska.usgs.gov

Copies of this report can be obtained from:

U.S. Geological Survey

Information Services

Building 810

Box 25286, Federal Center

Denver, CO 80225-0286

Suggested citation:

Wiley, J.B., and Curran, J.H., 2003, Estimating annual high-flow statistics and monthly and seasonal low-flow statistics 

for ungaged sites on streams in Alaska and conterminous basins in Canada: U.S. Geological Survey Water-Resources 

Investigations Report 03-4114, 61 p. 
Contents iii

CONTENTS

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

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

Purpose and Scope ...................................................................................................................................... 2

Previous Studies.......................................................................................................................................... 2

Acknowledgments....................................................................................................................................... 3

Description of Study Area.................................................................................................................................... 3

Determination of Drainage-Basin Characteristics................................................................................................ 5

Determination of Streamflow Analysis Regions.................................................................................................. 7

Flow Statistics for Streamflow-Gaging Stations.................................................................................................. 7

Data Collection............................................................................................................................................ 8

Data Adjustment.......................................................................................................................................... 8

Months and Seasons of Analysis................................................................................................................. 9

Flow-Duration Statistics.............................................................................................................................. 10

Low-Flow Frequency Statistics................................................................................................................... 10

Estimating Flow Statistics for Ungaged Sites...................................................................................................... 11

Annual High-Flow Statistics....................................................................................................................... 11

Monthly and Seasonal Low-Flow Statistics................................................................................................ 14

Accuracy and Limitations of Estimating Equations.................................................................................... 14

Procedures for Estimating Flow Statistics ........................................................................................................... 22

Summary ......................................................................................................................................................... 23

References Cited .................................................................................................................................................. 24
iv Figures

PLATE

[Plate is in pocket]

Plate 1. Map showing streamflow analysis regions and locations of streamflow-gaging stations

for which high-flow and low-flow statistics were computed, Alaska and conterminous

basins in Canada.

FIGURES

Figure 1. Map showing physical features and streamflow analysis regions of Alaska and 

conterminous basins in Canada.......................................................................................................... 4

Figure 2. Graph showing maximum, mean, and minimum daily mean discharge during the available 

period of record through water year 1999 for a typical coastal Alaska stream, a typical interior

Alaska/Canada stream, and a typical glacial Alaska/Canada stream................................................. 9
Tables v

TABLES

Table 1. Description and methods of estimating basin characteristics used in regression analysis ................ 6

Table 2. Estimating equations for annual high-duration flows in Regions 1–7, Alaska and 

conterminous basins in Canada.......................................................................................................... 12

Table 3. Range of basin characteristics used to determine estimating equations for high-flow 

statistics in Regions 1-7, Alaska and conterminous basins in Canada .............................................. 14

Table 4. Estimating equations for monthly low-duration flows for July, August, and September 

in Regions 1–7, Alaska and conterminous basins in Canada ............................................................ 15

Table 5. Estimating equations for seasonal low-duration flows and low-flow frequencies for 

July-through-September in Region 1, Alaska.................................................................................... 21

Table 6. Range of basin characteristics used to determine estimating equations for low-flow 

statistics in Regions 1-7, Alaska and conterminous basins in Canada .............................................. 21

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, 

Alaska and conterminous basins in Canada....................................................................................... 26

Table 8. Monthly low-duration flow statistics for July, August, and September for 

streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada ................................................................................................................................ 38

Table 9. Seasonal low-duration flow statistics and low-flow frequencies for 

July-through-September for streamflow-gaging stations in Region 1, Alaska and 

conterminous basins in Canada.......................................................................................................... 58
vi Conversion Factors and Datum

CONVERSION FACTORS AND DATUM

CONVERSION FACTORS

Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:

°C=(°F-32)/1.8

DATUM

Vertical coordinate information was referenced to the National Geodetic Vertical Datum 

of 1929 (NGVD 29).

Horizontal coordinate information was referenced to the North American Datum of 1927 

(NAD 27).

Multiply By To obtain

inch (in.) 2.54 centimeter

foot (ft) 0.3048 meter

foot per mile 0.1894 meter per kilometer

mile (mi) 1.609 kilometer

square mile (mi2) 2.590 square kilometer 

cubic foot per second (ft3/s) 0.02832 cubic meter per second 
Introduction 1

Estimating Annual High-Flow Statistics and Monthly and 

Seasonal Low-Flow Statistics for Ungaged Sites on 

Streams in Alaska and Conterminous Basins in Canada

By Jeffrey B. Wiley and Janet H. Curran

ABSTRACT

Methods for estimating daily mean flowduration statistics for seven regions in Alaska and 

low-flow frequencies for one region, southeastern 

Alaska, were developed from daily mean 

discharges for streamflow-gaging stations in 

Alaska and conterminous basins in Canada. The 

15-, 10-, 9-, 8-, 7-, 6-, 5-, 4-, 3-, 2-, and 1-percent 

duration flows were computed for the Octoberthrough-September water year for 222 stations in 

Alaska and conterminous basins in Canada. The 

98-, 95-, 90-, 85-, 80-, 70-, 60-, and 50-percent 

duration flows were computed for the individual 

months of July, August, and September for 226 

stations in Alaska and conterminous basins in 

Canada. The 98-, 95-, 90-, 85-, 80-, 70-, 60-, and 

50-percent duration flows were computed for the 

season July-through-September for 65 stations in 

southeastern Alaska. The 7-day, 10-year and 

7-day, 2-year low-flow frequencies for the season 

July-through-September were computed for 65 

stations for most of southeastern Alaska. Lowflow analyses were limited to particular months or 

seasons in order to omit winter low flows, when 

ice effects reduce the quality of the records and 

validity of statistical assumptions.

Regression equations for estimating the 

selected high-flow and low-flow statistics for the 

selected months and seasons for ungaged sites 

were developed from an ordinary-least-squares 

regression model using basin characteristics as 

independent variables. Drainage area and 

precipitation were significant explanatory 

variables for high flows, and drainage area, 

precipitation, mean basin elevation, and area of 

glaciers were significant explanatory variables for 

low flows. The estimating equations can be used at 

ungaged sites in Alaska and conterminous basins 

in Canada where streamflow regulation, 

streamflow diversion, urbanization, and natural 

damming and releasing of water do not affect the 

streamflow data for the given month or season. 

Standard errors of estimate ranged from 15 to 56 

percent for high-duration flow statistics, 25 to 

greater than 500 percent for monthly low-duration 

flow statistics, 32 to 66 percent for seasonal lowduration flow statistics, and 53 to 64 percent for 

low-flow frequency statistics.

INTRODUCTION

Streamflow characteristics are required for 

analysis of hydraulic structures, hydropower facilities, 

contaminant concentrations, and other uses by public 

and private entities throughout Alaska. The need for 

high-flow and low-flow statistics, specifically, has 

increased as the consideration of aquatic biota becomes 

an increasingly important criterion for efficient and 

effective design of culverts and bridges and for 

establishing limits on contaminant concentrations and 

loads. High-flow and low-flow statistics are commonly 

computed from daily mean discharge as flow-duration 

statistics or flow-frequency statistics. Flow-duration 

statistics, such as the 98-percent duration flow for July, 

describe the daily mean discharge that is exceeded a 

given percentage of the time (98 percent of the days in 

July, for this example). The days on which the 

discharge is exceeded are not necessarily consecutive. 
2 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Flow-frequency statistics, such as the 7-day, 2-year low 

flow, refer to the discharge that occurs on a certain 

number of consecutive days (7, for this example) that is 

associated with a certain recurrence interval (2 years, in 

this example). These various statistics are often needed 

to address multiple aspects of a single problem. For 

example, estimates of high-duration flows (daily mean 

discharges exceeded a small percentage of the time) are 

needed to design structures that adequately 

accommodate streamflow while not overtaxing the 

swimming capacity of fish. Likewise, estimates of lowduration flows (daily mean discharges exceeded a large 

percentage of the time), and low-flow frequency and 

magnitude, are needed to design structures that 

maintain adequate flow during periods critical to fish 

passage. 

To meet the growing need for streamflow 

statistics, the U.S. Geological Survey (USGS), in 

cooperation with the Alaska Department of 

Transportation and Public Facilities, developed new 

equations for estimating high-duration and lowduration flow statistics and low-flow frequency from 

daily mean discharge data through water year 1999. 

The analysis of daily mean discharge summarized in 

this report complements a separate analysis of flood 

frequency based on annual peak flows to complete a 

statewide analysis of streamflows. Most data for small 

streams (drainage basin less than 50 mi2) were 

collected by the USGS under this cooperative program. 

Other data were collected by the USGS, under 

cooperative agreements with Federal, State, and local 

agencies, and by the Water Survey of Canada. 

Purpose and Scope

This report presents (1) computed annual highflow and monthly and seasonal low-flow statistics for 

selected months and seasons for streamflow-gaging 

stations in Alaska and conterminous basins in Canada, 

and (2) equations for estimating high-flow and lowflow statistics at ungaged sites in Alaska. High-flow 

statistics are computed for the October-throughSeptember water year, and monthly low-flow statistics 

are computed for July, August, and September. 

Seasonal low-flow statistics and low-flow frequency 

are computed for the period July-through-September 

for southeastern Alaska only. Estimating equations are 

based on data that were not affected by streamflow 

regulation, urbanization, or failure of natural dams and 

were compiled from streamflow-gaging station records 

with at least 10 years of daily mean flow data through 

the 1999 water year. In addition to data from all eligible 

Alaskan streamflow-gaging stations, data from 

conterminous basins in Canada were used in this report 

to strengthen the analysis for the eastern regions of the 

State.

Previous Studies

Although no previous statewide flow-duration 

analyses are available, several reports with equations 

for high- and low-flow frequency statistics have been 

published. Studies undertaken at the University of 

Alaska-Fairbanks produced high-flow frequency and 

low-flow frequency estimating equations for two 

regions delineated by Lamke (1978), one containing 

coastal, southeastern, and Aleutian areas (Carlson, 

1987) and the other containing the rest of Alaska 

(Ashton and Carlson, 1984). Between the two reports, 

101 stations with drainage areas less than 100 mi2 are 

incorporated. Equations are presented for the 1-, 3-, 7-, 

and 15-day, 1.25-, 2-, 5-, 10-, and 20-year high flows 

for spring, summer, and fall and for the 3-, 7-, 14-, and 

30-day, 1.25-, 2-, 5-, 10-, and 20-year low flows for 

spring, summer, and fall.

A USGS study developed equations for 

estimating low-flow frequency for selected regions as 

well as for the entire State (Parks and Madison, 1985). 

Parks and Madison used data from the full year for 

streams with flows that did not approach zero in the 

winter as the result of river ice buildup. They present 

equations for estimation of the 7-day, 10-year; 30-day, 

10-year; and 90-day, 10-year low flows for 

southeastern, south-central, and Yukon Alaska and for 

the entire State.

Regional boundaries for peak-flow frequency 

estimation, which can be expected to be similar to 

high-flow regional boundaries, are presented in 

numerous previous studies, most recently Jones and 

Fahl (1994). As did the flow-duration and low-flow 

frequency studies, all of these peak-flow studies 

differentiated southeastern Alaska, along with all or 

parts of the rest of the southern Alaska coast, from the 

remaining parts of the State. Subdivision of the interior 

parts of the State varies.
Description of Study Area 3

Acknowledgments

The assistance of Lynne Campo, Water Survey of 

Canada, in providing updates to Canadian streamflow 

data is gratefully acknowledged. USGS student 

employees Brent Voorhees and Brian Winnestaffer 

digitized drainage basin outlines and developed 

methods to determine drainage basin characteristics 

from Geographic Information System (GIS) coverages. 

Portions of the comparison of previously obtained 

basin characteristics with basin characteristics obtained 

with modified methods appear in Brian Winnestaffer's 

senior thesis for Alaska Pacific University.

DESCRIPTION OF STUDY AREA

In its expanse of 586,000 mi2, Alaska 

encompasses geographical and climatic settings 

ranging from the moisture-laden, mountainous regions 

of the southeastern region to the dry, cold plains of the 

Arctic north. Some Alaskan drainage basins originate 

in conterminous areas of Canada's Yukon and British 

Columbia provinces (fig. 1); these areas are included in 

the study area. Alaska's streams eventually drain to the 

Arctic Ocean, Bering Sea, or Pacific Ocean.

Despite the relatively sparse network of datacollection sites in Alaska, broad patterns based on 

climate, geography, and geomorphology can be 

discerned that help explain Alaska hydrology. These 

patterns can largely be explained by the direction of 

dominant storm tracks, location of mountain ranges, 

and influence of coastal areas.

Most precipitation in Alaska results from storms 

that move northeastward from the Pacific Ocean 

(Lamke, 1991). Seasonal and geographic distribution 

of precipitation is affected by mountain ranges and 

variations in air temperature. The prolonged cold, dry 

Arctic air mass over interior Alaska in the winter 

decreases annual precipitation in this area of the State. 

Average annual precipitation ranges from more than 

300 in. in southeastern Alaska, received mostly during 

fall and winter, to less than 10 in. in areas near the 

Arctic Ocean, received mostly in summer and fall 

(Jones and Fahl, 1994, pl. 2). Three major mountainous 

belts stretch across all or part of Alaska. Coastal 

mountains rise steeply from the southern coast; an 

extensive arc of higher mountains consisting of the 

Aleutian Range, Alaska Range, and Coast Mountains 

spans the southern part of the State; and the Brooks 

Range extends across the State north of the Arctic 

Circle (fig. 1). Glaciers are most prevalent along the 

southern mountain ranges where precipitation is 

greater than in northern regions. Basins in coastal areas 

typically are small and receive large amounts of 

precipitation. Average basin elevations are low near the 

coast.

Climatic conditions that generate extended 

periods of high or low streamflow generally do not 

extend simultaneously across the State because of its 

size, so no statewide periods of floods or droughts have 

been documented. However, several regional floods 

and droughts have been identified since 1949, when 

widespread gaging records became available. Major 

flooding occurred in interior Alaska in 1964, near 

Fairbanks in 1967 (Childers and others, 1972), in 

south-central Alaska in 1971 (Lamke, 1972) and 1986 

(Lamke and Bigelow, 1988), along the Copper River in 

1981, and in south-central Alaska and the Kenai 

Peninsula in 1995. Flood conditions persisted for at 

least 3 days during each of these major events. 

Droughts occurred in southeastern Alaska in 1950-52, 

the upper Yukon River in 1950-57, southeastern Alaska 

from spring 1965 to spring 1966, south-central and 

southwestern Alaska and the middle Yukon River in 

1968-71, south-central Alaska and middle Yukon River 

in 1973-80, and southeastern Alaska in 1981-86 

(Lamke, 1991).
4 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Pacific Ocean

Arctic Ocean

Bering Sea

Norton

Sound

Bristol Bay

Gulf of Alaska

Hecate Strait

Koyukuk

River

River

ukon Y

River

PorcupinePorcupine

River

Colville

River

Kuskokwim

Beaufort Sea

River

River

Tanana

Susitna

River Copper

River

Yukon

i R ver Liard

BritishColumbia

Yukon

NorthwestTerritories

Nunavut

Anchorage

Fairbanks

Nome

Whitehorse

Juneau

Barrow

Brooks Range

Coast

Mountains

Alaska

CANADA

Ke ai n Peninsula

7

5

6

4

2

1

3

l A a s k a R a n g e

A l e u t i a n

R a n g e

RUSSIA

Canadian Land Inventory Level I Digital Data published at 1:2,000,000. Publication projection is Albers Equal Area.Standard Parallels are 55°and 65°, central meridian -154°west, latitude of projection origin 50°.Eastern Russian coastline from U.S. Geological Survey, Geologic Investigations Series I-2679, published at 1:7,500,000.Projection is Albers Equal Area, Standard Parallels are 55°and 65°, central meridian 160°west.Koryak Highlands coastline, 160°-175° modified from U.S. Geological Survey Open-File Report 96-727, published at 1:1,000,000.Projection is Lambert Azimuthal Equal Area, central meridian 165°west.

Base map modified from U.S. Geological Survey Digital Line Graphs published at 1:2,000,000.

BOUNDARY OF STREAMFLOWANALYSIS REGION—Number isregion number

EXPLANATION 1

A R C T I C C I R C L E

0 200 400 600 MILES

0 200 400 600 800 KILOMETERS

Figure 1. Physical features and streamflow analysis regions of Alaska and conterminous basins in Canada.
Determination of Drainage-Basin Characteristics 5

DETERMINATION OF DRAINAGE-BASIN 

CHARACTERISTICS

Physical and climatic features of the watershed 

upstream of a given stream location, termed basin 

characteristics, are independent variables that can be 

used to estimate streamflow statistics (Thomas and 

Benson, 1970). Nine basin characteristics used in the 

previous statewide flood-frequency analysis (Jones and 

Fahl, 1994) were available for all stations: drainage 

area, main channel slope, main channel length, mean 

basin elevation, area of lakes and ponds, area of forests, 

area of glaciers, mean annual precipitation, and mean 

minimum January temperature. Although all nine 

variables were included in the present analysis, only 

drainage area and mean annual precipitation were used 

in the final high-flow equations and only drainage area, 

mean annual precipitation, mean basin elevation, and 

area of glaciers were used in the final low-flow 

equations.

Previously determined basin characteristics were 

available for most of the stations used in the present 

analysis (Jones and Fahl, 1994). Definitions of the 

basin characteristics and the manual methods used to 

determine them are described in reports by others 

(Jones and Fahl, 1994; U.S. Geological Survey, 1978) 

and are summarized in table 1. Basin characteristics for 

stations not in the Jones and Fahl (1994) report were 

obtained using modified methods, which are also 

summarized in table 1. Automated procedures for 

determining selected basin characteristics for new 

stations were created using the AML programming 

language with Arc/Info GIS software (Environmental 

Systems Research Institute, 1997). Only basin 

characteristics used in final equations are presented in 

this report; additional basin characteristics are available 

from the Alaska Science Center.

For statistical analyses such as the regressions 

performed for the present study, all data must be 

collected in a similar manner to minimize error within 

individual variables. Although new methods of 

estimation or new sources of data for basin 

characteristics may produce values that more 

accurately represent the basin, it is not appropriate to 

mix such data with previously obtained data in the 

same analysis. To assess the level of variability 

introduced by the modified methods used in this study, 

basin characteristics were determined by both methods 

shown in table 1 for 19 stations on the Kenai Peninsula 

and were compared. A statistically significant 

difference was observed only between previous and 

modified determinations of main channel length and of 

main channel slope, which is derived in part from main 

channel length. Possible reasons for these differences 

include operator choice of main channel path to the 

drainage divide, an increased ability to measure highly 

sinuous paths with digital methods, and physical 

changes in channel path between map dates. Although 

main channel length and slope were included in the 

regression analysis, they were not used in any final 

equations. Differences also were noted for area of 

glaciers, but they were magnified because of the small 

magnitudes of these values and were not considered 

significant to the final equations. Although the 

variability introduced into the regression analysis by 

using the modified methods for a few stations is small, 

the user should be aware that using modified methods, 

especially without a comparison with previous 

methods, could introduce significant error for an 

individual site. In general, methods used for 

determining basin characteristics at an ungaged site 

should be as consistent as possible with the methods 

described by Jones and Fahl (1994) and the U.S. 

Geological Survey (1978) and summarized in table 1.
6 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Table 1. Description and methods of estimating basin characteristics used in regression analysis

Basin characteristic 

name and unit Description

Estimating technique for stations 

Included in Jones and Fahl (1994) Added to analysis since 

Jones and Fahl (1994)

Drainage area, in 

square miles

Area of the drainage basin 

upstream from the site

Basin outlined on topographic maps of various 

scales; area determined by planimeter

Basin outlined on paper topographic maps of 

various scales; outline digitized; area 

estimated using Arc/Info AML application

Main channel length, 

in miles

Length of the main channel 

between the site and the 

basin divide measured 

along the channel that 

drains the largest basin

Length measured manually along topographic 

map blue lines and extension to basin divide

Sum of lengths of line segments representing 

stream on digital hydrography data 

(http://agdc.usgs.gov/data/ usgs/ 

to_geo.html), plus length of line extended 

digitally from stream end to basin divide 

Main channel slope, in 

feet per mile

Average slope between 

points 10 and 85 percent 

of the distance along the 

main channel from the 

site to the basin divide

Main channel length measured from topographic 

map as described separately; elevation at 

specified points estimated from topographic 

contours

Main channel length measured from digital 

hydrography data as described separately; 

elevation at specified points estimated from 

digital elevation data 

(http://agdc.usgs.gov/data/ usgs/ to_geo.html)

Mean basin elevation, 

in feet

Mean elevation of the 

drainage basin upstream 

from the site

Grid sampling from topographic maps Arc/Info AML application applied to digital 

elevation data (http://agdc.usgs.gov/data/ 

usgs/ to_geo.html)

Area of lakes and 

ponds, in percent

Percentage of the total 

drainage area shown as 

lakes and ponds on 

topographic map

Planimeter measurement or grid sampling of 

blue areas on topographic map

Sum of areas of lake and pond polygons from 

digital hydrography coverage 

(http://agdc.usgs.gov/data/ usgs/ to_geo.html)

Area of forests, in 

percent

Percentage of total drainage 

area shown as forested on 

topographic map

Planimeter measurement or grid sampling of 

green areas on topographic map

Digitized green areas on topographic map

Area of glaciers, in 

percent

Percentage of total drainage 

area shown as perennial 

snow or ice on 

topographic map

Planimeter measurement or grid sampling of 

areas marked as snow or ice on topographic 

map

Sum of areas of glacier or permanent snowfield 

polygons from digital hydrography coverage 

(http://agdc.usgs.gov/data/usgs/to_geo.html)

Mean annual 

precipitation, in 

inches

Mean annual precipitation 

averaged over drainage 

basin

Grid sampling from plate 2, Jones and Fahl 

(1994) (http://ak.water.usgs.gov/Publications/ 

pdf.reps/wrir93.4179.plate2.pdf)

Arc/Info AML application applied to Arc/Info 

coverage of plate 2, Jones and Fahl (1994) 

(http://agdc.usgs.gov/data/ usgs/water/ 

statewide.html)

Mean minimum 

January 

temperature, in 

degrees Fahrenheit

Mean minimum January 

temperature averaged 

over drainage basin

Grid sampling from plate 1, Jones and Fahl 

(1994) (http://ak.water.usgs.gov/ 

Publications/pdf.reps/wrir93.4179.plate1.pdf)

Visual estimation from plate 1, Jones and Fahl 

(1994) for small basins 

(http://ak.water.usgs.gov/ 

Publications/pdf.reps/wrir93.4179.plate1.pdf)
Flow Statistics for Streamflow-Gaging Stations 7

DETERMINATION OF STREAMFLOW 

ANALYSIS REGIONS

Dividing areas as large and geographically and 

climatically diverse as Alaska into smaller regions for 

analysis usually improves the accuracy of estimation 

equations. Stations within a region should have similar 

hydrologic characteristics, but a balance must be struck 

between isolating hydrologically similar regions and 

meeting minimum sample size requirements for 

statistical analysis. Initial placement of stations into 

streamflow analysis regions was guided by hydrologic 

unit boundaries (U.S. Geological Survey, 1987) and 

regional boundaries used in previous reports, in 

particular the peak-flow analysis by Jones and Fahl 

(1994). Refinement of regional boundaries was based 

on the geographic distribution of basin characteristics 

and residuals from regression analysis of selected 

streamflow statistics against selected basin 

characteristics. Specifically, dependent variables July 

90- and 50-percent duration flows, 2- and 10-percent 

duration flows, and 7-day, 10-year low-flow frequency, 

as well as other variables from a peak-streamflow 

analysis, were regressed against independent variables 

drainage area and mean annual precipitation. On the 

basis of these analyses, the State was divided into seven 

hydrologically distinct streamflow analysis regions 

(plate 1). Stations physically located in one region but 

draining a large area in a neighboring region may be 

classified in the neighboring region if they are 

hydrologically more similar to that region.

Certain neighboring regions were hydrologically 

similar to each other for high-flow analysis but not 

low-flow analysis. To avoid the confusion of multiple 

sets of regions, all regions retained their identity for 

both high- and low-flow analyses. Hydrologically 

similar regions were grouped together for development 

of regional equations. Grouping of regions was based 

on examination of regression residuals and on 

comparison of the standard error of the resulting 

equations. Specifically, Region 3 was grouped with 

Region 1 for high-duration flows and with Region 4 for 

low-duration flows. Seasonal low-flow frequency 

statistics for Regions 1 and 3 indicated that these 

regions are too dissimilar to be combined for this 

particular analysis; equations were developed for 

Region 1, but not Region 3, because there were too few 

stations in Region 3. Region 7 contains very few 

stations but could not logically be combined with 

adjoining regions.

FLOW STATISTICS FOR STREAMFLOWGAGING STATIONS

Flow durations and low-flow frequency statistics 

are computed from records of daily mean discharge for 

streamflow-gaging stations. To be suitable for use in a 

regional regression, streamflow must be correlated with 

the basin characteristics used as independent variables. 

Flow statistics for this study were computed for nonurbanized stations having at least 10 years of record 

through water year 1999. Only those stations having at 

least 10 years of record during unregulated periods that 

were unaffected by flow diversion, earth-dam failures, 

or periodic glacier-affected flow were used in 

regression analysis. Station statistics were computed 

for selected stations having 10 years of record that were 

influenced by factors not related to basin 

characteristics, primarily streamflow regulation or 

periodic glacier-affected flow. These statistics were not 

included in the regression analysis. Details of data 

collection and criteria for analysis are discussed in the 

following sections.

Annual high-duration flow statistics were 

computed for 230 streamflow-gaging stations, 177 in 

Alaska and 53 in Canada (table 7, at back of report). Of 

these, statistics from 222 stations were suitable for use 

in regression analysis. Monthly low-duration flow 

statistics were computed for 231 streamflow-gaging 

stations, 177 stations in Alaska and 54 stations in 

Canada (table 8, at back of report). Of these, statistics 

from 226 stations were suitable for use in regression 

analysis. Seasonal low-duration flow statistics were 

computed for 66 stations in Region 1, 65 stations in 

Alaska, and 1 station in Canada (table 9, at back of

report). Of these, statistics from 65 stations were 

suitable for use in regression analysis. Seasonal lowflow frequency statistics were computed for 65 stations 

in Region 1, 64 stations in Alaska, and 1 station in 

Canada (table 9). All 65 stations were suitable for use 

in regression analysis.
8 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Data Collection

Streamflow data for Alaska were collected 

by the USGS in accordance with methods described 

by Rantz and others (1982). Streamflow data for 

Canada were collected by the Water Survey of 

Canada. Canadian data collection methods are 

described in a series of internal manuals referred to 

collectively as the Hydrometric Data Computation 

Procedures Manual (Lynne Campo, Water Survey of 

Canada, written commun., 2002). These methods are 

similar or equivalent to USGS methods. Daily mean 

discharge for USGS streamflow-gaging stations in 

Alaska are available on the World Wide Web at 

http://waterdata.usgs.gov/ak/nwis/ or by contacting the 

Alaska Science Center at the address listed at the front 

of this report. Canadian streamflow data are available 

from Environment Canada (Environment Canada, 

2002).

Data Adjustment

Stations with at least 10 years of daily mean flow 

data were reviewed for quality of record and for 

streamflow that could not be correlated with basin 

characteristics, such as regulated streamflow or glacialoutburst floods. Records were adjusted as needed by 

omitting stations, censoring years with non-recurring 

unsuitable streamflow, or segregating multiple parts of 

record for analysis, as discussed in the following 

paragraphs. Because few long-term stations exist and 

because climatic phenomena such as droughts are 

poorly documented in Alaska or not spatially extensive 

relative to the size of the State, analyses were not 

restricted to a common period of record but instead 

were performed on the entire period of record through 

water year 1999.

Records with non-homogeneities clearly not 

related to normal streamflow conditions (for example, 

temporary conditions related to land-surface elevation 

changes as a result of a large earthquake in 1964) were 

censored to remove inconsistent years.

Several Alaskan stations have at least 10 years of 

record but are subject to streamflows that cannot be 

correlated with basin characteristics. Streamflow 

regulated by dams, controlled by certain glacial 

phenomena, or in basins with indeterminate drainage 

areas can be analyzed but not used to develop 

predictive equations based on physical and climatic 

characteristics of the basin. Stations subject to these 

conditions are noted in tables 7, 8, and 9.

Streamflow regulation may affect low flows but 

not high flows or vice versa, so some regulated stations 

were included as if unregulated in high- or low-flow 

analyses, wherever appropriate, based on knowledge of 

the type of regulation. For streamflow records affected 

by regulation, known dates of regulation were used to 

segregate the period of record into regulated and 

unregulated periods. Regulated periods of record were 

analyzed but excluded from regression analysis, and 

unregulated periods of record were analyzed and 

included in regression analysis. For example, the Kenai 

River (station 15258000) and the Chena River (station 

15514000) had more than 10 years of record for 

periods of regulated flow and for periods of 

unregulated flow. For high-flow analysis, both 

regulated and unregulated periods were analyzed, 

resulting in two sets of station statistics for each 

station. For low-flow analysis, both periods were 

analyzed independently for the Kenai River, but were 

combined for the Chena River because low flows in 

that river are not affected by regulation.

Glacier-related controls on streamflow include 

glacial-outburst floods, caused when ice dams ponding 

water suddenly burst, and periods of low flow caused 

as ice-dammed lakes fill. The effect of these 

phenomena depends on factors such as the location of 

bedrock constrictions and interactions between 

multiple glaciers in a basin, which cannot be 

summarized by the available basin characteristic, the 

area of the basin covered by glaciers. Glacial-outburst 

floods generally affect high flows but have little effect 

on low flows, so for high-flow analysis, stations with 

glacial outbursts were analyzed for station statistics, 

but for low-flow analysis they were included in the 

regression analysis as unaffected stations. For the Knik 

River (station 15281000), the period when the glacier 

was no longer in a position to generate alternating 

damming and flooding was separated and analyzed 

independently from the period of glacially affected 

record. The glacially affected record was shorter than 

10 years and was not analyzed.
Flow Statistics for Streamflow-Gaging Stations 9

Months and Seasons of Analysis

Commonly, flow duration analyses are 

performed for an entire water year (October through 

September) for high flows or climatic year (April 

through March) for low flows. This assumes that the 

record quality remains good and is unaffected by 

phenomena not related to basin characteristics, 

conditions often not met in cold environments. During 

Alaska winters, many rivers freeze over completely and 

their records include stage increases, caused by water 

flowing on top of ice, that do not correlate to the openwater rating curve. Because of the limited accuracy of 

winter streamflow records, annual analysis is useful 

only for high-flow analyses in environments like 

Alaska.

Monthly and seasonal analyses can be used for 

low flows in place of annual analyses to eliminate 

undesired effects of ice during winter months (Searcy, 

1959). To select appropriate months and/or seasons for 

the analysis of Alaska streams, graphs of minimum, 

mean, and maximum daily mean discharge for the 

period of record for each station were prepared using 

the USGS Automated Data Processing System 

(ADAPS). Inspection of these hydrographs indicated 

that Alaska streams typically fit one of three general 

patterns: coastal, interior, or glacial (fig. 2). The 

distribution of these characteristic hydrographs was 

used to confirm the suitability of streamflow-analysis 

region boundaries and then to determine appropriate 

periods of analysis within each region.

In coastal streams, found along the Pacific Coast 

from southeastern Alaska to the Aleutian Islands 

(Regions 1 and 3, respectively), flow is affected yearround by rainfall, is not strongly affected by ice, and 

has a flat or rising trend following the snow melt peak 

(fig. 2). Coastal streams never had low flows in June 

and some began to freeze over by October; therefore, 

July, August, and September were the appropriate 

choices for monthly analyses. Although winter lowflow statistics may be of interest to some users and 

could be legitimately computed for some coastal 

streams, summer low-flow statistics are statistically 

more valid across these regions for seasonal analyses. 

Streams in these regions do not have a consistent 

downward or upward streamflow trend. Because the 

lowest flows could occur at any time within the openwater season, a seasonal analysis for the period July 

through September also was possible for selected 

coastal areas.

In contrast, flow in interior streams typically is 

affected by ice during the low-flow period in winter 

and spring, rises suddenly and strongly to a snow melt 

peak, then falls for the remainder of the open-water 

season (fig. 2). Interior streams are found in a wide 

Interior Stream

100

200

500

1,000

2,000

5,000

10,000

20,000

30,000

WATER YEARS 1953-58, 1962-96

Coastal Stream

10

5

2

1

20

50

100

200

500

1,000

2,000

4,000

WATER YEARS 1949-63

MAXIMUM

MINIMUM

MEAN

Glacial Stream

10

20

50

100

200

500

1,000

2,000

5,000

10,000

20,000

50,000

Oct. May Nov. Dec. Jan. Feb. Mar. Apr. June July Aug. Sept.

WATER YEARS 1957-66, 1968-86

Station 15085800, Maybeso Creek at Hollis, Alaska

Station 15305300, Big Salmon River near

Carmacks, Yukon Territory

Station 15291000, Susitna River near Denali, Alaska

Figure 2. Maximum, mean, and minimum daily mean discharge during 

the available period of record through water year 1999 for a typical 

coastal Alaska stream, a typical interior Alaska/Canada stream, and a 

typical glacial Alaska/Canada stream.
10 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

swath north of coastal areas, generally within Regions 

2, 4, 5, and 6. Interior streams usually are ice-free from 

July through September, making analysis of July, 

August, and September appropriate for characterizing 

low flows. However, the lowest flows consistently 

occur near the end of the open-water season, which 

would strongly bias a seasonal analysis toward 

September. For this reason, no seasonal flow-duration 

or low-flow frequency statistics were computed for 

these streams. Streams north of the typical interior 

streams (Region 7) did not have a consistent 

hydrograph, but as a group they most closely resembled 

interior streams and were conservatively analyzed on a 

monthly basis.

Flow in glacial streams rises suddenly and 

strongly as winter snow melts, continues to rise until 

mid-summer, then declines throughout fall (fig. 2). 

These streams are found in both coastal and interior 

regions and were not plentiful enough to analyze 

separately from surrounding streams.

Flow-Duration Statistics

A flow-duration statistic is a point on a flowduration curve representing the percentage of time that 

particular streamflow is equaled or exceeded during a 

given period. For example, the 98-percent duration 

flow, considered a low flow, is equaled or exceeded 

98 percent of the time, and the 2-percent duration flow, 

considered a high flow, is equaled or exceeded only 

2 percent of the time. Flow-duration curves are 

cumulative frequency curves compiled by ranking all 

daily mean streamflows for the period in order of 

magnitude, then computing the percentage of time each 

streamflow is equaled or exceeded (Searcy, 1959). The 

final curve is a plot of the streamflows against their 

respective exceedance probabilities.

An internal (not publicly available) USGS 

computer program, DVSTAT, part of the USGS 

Automated Data Processing System (ADAPS), was 

used to compute flow durations. DVSTAT 

accomplishes these computations by tallying flows in 

35 classes, with class boundaries based on the range of 

data analyzed. Although flow-duration curves 

technically describe streamflow characteristics only for 

the period of record analyzed, curves for long periods 

of record can be considered probability curves useful 

for estimation of future flows (Searcy, 1959).

The 15-, 10-, 9-, 8-, 7-, 6-, 5-, 4-, 3-, 2-, and 

1-percent duration flows (high flows) for all stations 

analyzed are presented in table 7. The 98-, 95-, 90-, 

85-, 80-, 70-, 60-, and 50-percent duration flows (low 

flows) for all stations analyzed are presented in table 8, 

arranged by month of analysis. The 98-, 95-, 90-, 85-, 

80-, 70-, 60-, and 50-percent duration flows for Julythrough-September for Region 1 (Southeast Alaska) 

are presented in table 9.

Low-Flow Frequency Statistics

A low-flow frequency statistic is a point on a 

low-flow frequency curve representing the mean 

streamflow over a given number of days for a given 

recurrence interval. For example, the mean streamflow 

over 7 days is expected to be less than or equal to the 

7-day, 2-year low, on average, at least once in a 2-year 

period. The nonexceedance probability is the inverse of 

the recurrence interval, so conversely, there is a 50-

percent probability that the mean streamflow over 

7 days will be less than the 7-day, 2-year low flow in 

any year. Low-flow frequency curves are compiled 

from an annual series of the minimum mean flow for 

all consecutive n-day periods, where n is any number 

from 1 to 365, commonly 7. The annual series is 

ranked in order of magnitude, then the recurrence 

interval for each value is computed and a plot of the 

streamflows against their respective recurrence interval 

is prepared (Riggs, 1972). Recurrence intervals 

typically are computed by fitting a log-Pearson Type III 

distribution to the data.
Estimating Flow Statistics for Ungaged Sites 11

USGS computer programs IOWDM, SWSTAT, 

and ANNIE (Flynn and others, 1995), available on the 

World Wide Web at http://water.usgs.gov/software/ 

surface_water.html, were used to load data, compute 

low-flow frequency statistics, and display output data, 

respectively. SWSTAT produces the series of n-day 

values, determines the minimum values for each year, 

ranks this annual series, fits the annual series to a logPearson type III distribution, plots the resulting curves, 

and extracts the specified low-flow frequency statistics. 

Because the data are fit to a distribution, however, the 

hydrologist must inspect the data for outliers and 

interpret whether the fitted distribution is valid.

The 7-day, 2-year flows (J-S7Q2) and 7-day, 

10-year flows (J-S7Q10) for the season July through 

September for Region 1 (Southeast Alaska) are 

presented in table 9.

ESTIMATING FLOW STATISTICS FOR 

UNGAGED SITES

Estimated flow statistics are often needed for 

streams where no streamflow-gaging station exists. If 

sufficient records are available from a group of 

streamflow-gaging stations within a region, a 

regression model can be developed from flow statistics 

and basin characteristics of gaged sites to estimate flow 

statistics at ungaged sites where the basin 

characteristics can be measured. Multiple linear 

regression analysis is used to determine which of 

several basin characteristics (the independent variables) 

best explain, statistically, the variations in the flow 

statistic (the dependent variable). Regression analysis 

is also used to develop the final equations that relate the 

dependent and independent variables. Ordinary-leastsquares regression, a common form of regression 

analysis, was used for all analyses in this study.

Streamflow data and basin characteristics 

generally are log-normally distributed, so all data were 

log-transformed (base 10) before analysis. This 

required the addition of a constant value of 1 percent to 

all percentage data and 32 degrees to temperature data 

because values equal to or less than 0 cannot be logtransformed. To determine which basin characteristics 

best explain the variations in the flow statistics, the 

commercial statistics and data-management software 

S-Plus was used to perform a stepwise multiple linear 

regression for two or more representative dependent 

variables to determine suitable independent variables. 

Independent variables were further screened for 

statistical significance, correlation with other variables, 

and logical relation to streamflow in that area and were 

dropped if the equation's standard error fell by less than 

5 percent (arbitrarily chosen as the point of diminishing 

returns), or if the variable could not logically be 

correlated with streamflow in that particular area. Once 

a suite of possible variables was selected for the 

representative flow statistics, only those variables that 

increased the coefficient of determination and reduced 

the standard error by more than 5 percent for a given 

flow statistic were included in the final equation.

Selected equations produced overlap, wherein a 

predicted value for a given flow-duration percentile 

exceeded a predicted value for the next lower 

percentile. In general, this problem did not occur 

within the combinations of ranges of variables 

expected in the study area. However, for selected 

equations in Region 7, constants or coefficients in the 

final equations had to be adjusted slightly to avoid 

overlap at expected ranges of variables. Adjustments 

were based on the values and trends in neighboring 

equations and were restricted to the minimum required 

to avoid overlap.

Annual High-Flow Statistics

Multiple stepwise regressions for the 2-percent 

and 10-percent duration flows were used to select 

appropriate variables for each region. Linear 

regressions for 15-, 10-, 9-, 8-, 7-, 6-, 5-, 4-, 3-, 2-, and 

1-percent duration flows then were used to develop 

final estimating equations from the respective flow 

statistics and the selected basin characteristics as 

described above (table 2). The number of stations used 

in each region varied from 12 to 78 (table 2). Ranges of 

independent variables (basin characteristics) used in 

the equations are presented in table 3.
12 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

1

3

2

6 5

4

7

1

3

2

6 5

4

7

1

3

2

6 5

4

7

Table 2. Estimating equations for annual high-duration flows in Regions 1–7, 

Alaska and conterminous basins in Canada 

[Estimating equation: O-Sn, daily mean discharge for the water year October–

September having an n-percent exceedance probability, in cubic feet per second; A, 

drainage area, in square miles; P, mean annual precipitation, in inches]

Estimating equation Coefficient of 

determination

Standard 

error of 

estimate, 

in percent

Regions 1 and 3 (78 streamflow gaging stations)

O-S15 = 0.1358 A 0.9660 P 1.016 0.97 22

O-S10 = 0.2145 A 0.9472 P 0.9740 0.97 21

O-S9 = 0.2382 A 0.9422 P 0.9652 0.97 22

O-S8 = 0.2670 A 0.9374 P 0.9550 0.97 22

O-S7 = 0.3033 A 0.9307 P 0.9443 0.97 22

O-S6 = 0.3486 A 0.9234 P 0.9329 0.96 22

O-S5 = 0.4120 A 0.9162 P 0.9179 0.96 23

O-S4 = 0.4875 A 0.9074 P 0.9057 0.96 23

O-S3 = 0.6039 A 0.8963 P 0.8892 0.96 24

O-S2 = 0.7960 A 0.8829 P 0.8697 0.95 25

O-S1 = 1.279 A 0.8637 P 0.8293 0.94 27

Region 2 (22 streamflow gaging stations)

O-S15 = 0.1487 A 0.9842 P 1.071 0.99 18

O-S10 = 0.2281 A 0.9777 P 1.012 0.99 16

O-S9 = 0.2546 A 0.9753 P 0.9959 0.99 15

O-S8 = 0.2811 A 0.9737 P 0.9818 0.99 15

O-S7 = 0.3145 A 0.9713 P 0.9662 0.99 15

O-S6 = 0.3542 A 0.9682 P 0.9511 0.99 15

O-S5 = 0.3996 A 0.9651 P 0.9362 0.99 15

O-S4 = 0.4570 A 0.9628 P 0.9180 0.99 15

O-S3 = 0.5385 A 0.9584 P 0.8979 0.99 15

O-S2 = 0.6366 A 0.9539 P 0.8824 0.99 16

O-S1 = 0.8041 A 0.9462 P 0.8666 0.99 16

Region 4 (42 streamflow gaging stations)

O-S15 = 2.443 × 10 -2 A 1.055 P 1.340 0.98 30

O-S10 = 3.637 × 10 -2 A 1.042 P 1.301 0.98 31

O-S9 = 3.970 × 10 -2 A 1.039 P 1.293 0.98 31

O-S8 = 4.353 × 10 -2 A 1.036 P 1.284 0.98 31

O-S7 = 4.844 × 10 -2 A 1.032 P 1.274 0.98 31

O-S6 = 5.426 × 10 -2 A 1.027 P 1.264 0.98 32

O-S5 = 6.216 × 10 -2 A 1.022 P 1.249 0.98 32

O-S4 = 7.213 × 10 -2 A 1.017 P 1.234 0.98 32

O-S3 = 8.368 × 10 -2 A 1.009 P 1.225 0.98 32

O-S2 = 0.1046 A 1.001 P 1.204 0.98 32

O-S1 = 0.1505 A 0.9881 P 1.164 0.98 34
Estimating Flow Statistics for Ungaged Sites 13

1

3

2

6 5

4

7

1

3

2

6 5

4

7

1

3

2

6 5

4

7

Table 2. Estimating equations for annual high-duration flows in Regions 1–7, 

Alaska and conterminous basins in Canada —Continued

[Estimating equation: O-Sn, daily mean discharge for the water year October–

September having an n-percent exceedance probability, in cubic feet per second; A, 

drainage area, in square miles; P, mean annual precipitation, in inches]

Estimating equation Coefficient of 

determination

Standard 

error of 

estimate, 

in percent

Region 5 (34 streamflow gaging stations)

O-S15 = 6.391 × 10 -3 A 1.106 P 1.779 0.96 37

O-S10 = 8.746 × 10 -3 A 1.104 P 1.751 0.96 38

O-S9 = 9.570 × 10 -3 A 1.103 P 1.736 0.96 39

O-S8 = 1.067 × 10 -2 A 1.102 P 1.718 0.96 39

O-S7 = 1.215 × 10 -2 A 1.100 P 1.696 0.95 40

O-S6 = 1.397 × 10 -2 A 1.098 P 1.668 0.95 41

O-S5 = 1.579 × 10 -2 A 1.097 P 1.648 0.95 42

O-S4 = 1.977 × 10 -2 A 1.091 P 1.609 0.95 43

O-S3 = 2.508 × 10 -2 A 1.087 P 1.561 0.94 45

O-S2 = 3.769 × 10 -2 A 1.081 P 1.468 0.94 46

O-S1 = 5.859 × 10 -2 A 1.078 P 1.372 0.93 50

Region 6 (34 streamflow gaging stations)

O-S15 = 3.927 × 10 -3 A 1.075 P 1.870 0.99 29

O-S10 = 8.141 × 10 -3 A 1.050 P 1.765 0.99 27

O-S9 = 9.743 × 10 -3 A 1.045 P 1.736 0.99 27

O-S8 = 1.200 × 10 -2 A 1.038 P 1.703 0.99 28

O-S7 = 1.515 × 10 -2 A 1.031 P 1.664 0.99 28

O-S6 = 1.953 × 10 -2 A 1.023 P 1.618 0.99 29

O-S5 = 2.546 × 10 -2 A 1.015 P 1.577 0.99 29

O-S4 = 3.601 × 10 -2 A 1.005 P 1.514 0.99 29

O-S3 = 5.281 × 10 -2 A 0.9940 P 1.445 0.99 29

O-S2 = 9.204 × 10 -2 A 0.9783 P 1.342 0.99 31

O-S1 = 0.2144 A 0.9512 P 1.193 0.99 33

Region 7 (12 streamflow gaging stations)

O-S15 = 1.931 × 10 -3 A 1.065 P 2.171 0.98 56

O-S10 = 1.124 × 10 -2 A 1.023 P 1.798 0.98 54

O-S9 = 1.633 × 10 -2 A 1.017 P 1.715 0.98 51

O-S8 = 2.406 × 10 -2 A 1.013 P 1.627 0.98 50

O-S7 = 3.630 × 10 -2 A 1.009 P 1.530 0.98 48

O-S6 = 5.434 × 10 -2 A 1.004 P 1.441 0.98 46

O-S5 = 9.005 × 10 -2 A 0.9990 P 1.325 0.98 44

O-S4 = 0.1671 A 0.9932 P 1.182 0.98 40

O-S3 = 0.3611 A 0.9936 P 0.9825 0.98 39

O-S2 = 0.8276 A 0.9905 P 0.7864 0.99 36

O-S1 = 2.615 A 0.9860 P 0.5107 0.98 38
14 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

.

Monthly and Seasonal Low-Flow Statistics

For monthly flow-duration analysis, multiple 

stepwise regressions for July and September 90-percent 

duration flows and July and September 50-percent 

duration flows were used to select appropriate variables 

for each region. For seasonal flow-duration analysis in 

Region 1, the July-through-September 90-percent 

duration flow and July-through-September 50-percent 

duration flow were used to select variables for flow 

duration analysis and the 7-day, 10-year flow was used 

to select variables for the low-flow frequency analysis. 

Linear regressions for the 98-, 95-, 90-, 85-, 80-, 70-, 

60-, and 50-percent duration flows and for 7-day, 

2-year and 7-day, 10-year low-flow frequency statistics 

then were used to develop final estimating equations 

from the respective flow statistics and the selected 

basin characteristics as described above (table 4

and 5). The number of stations used in each region 

ranged from 13 to 65 (table 4) for monthly analyses and 

was 65 for seasonal analyses. Ranges of independent 

variables (basin characteristics) used in the equations 

are presented in table 6.

Accuracy and Limitations of Estimating Equations

The adequacy of the estimating equations can be 

evaluated by two measures included in tables 2, 4, 

and 5. The coefficient of determination, also known as 

the R-squared (R2), is the percentage of variation in the 

dependent variable explained by the independent 

variables. This value is typically high for regressions of 

flow statistics and basin characteristics. A second 

value, the standard error of estimate, is the average 

variation between the regression estimates and the 

station data for the stations used to develop the 

regression equations. About two-thirds of the 

regression estimates for the stations have errors less 

than the standard error of estimate. The standard errors 

of estimate presented in the tables are thus a cumulative 

assessment of each particular equation and do not apply 

to any one station. Standard errors of estimate typically 

are slightly less than the average prediction error, 

which is a measure of the accuracy of the regression 

equations for predicting values at sites not used to 

develop the equations. Average prediction error is not 

available for the equations in this report. Likewise, 

confidence limits (prediction intervals) for estimated 

values for a particular station require data not available 

for this report. Standard errors of estimate were 

computed in log units and converted to percentages 

(Hardison, 1971). Unlike the coefficient of 

determination, the standard error of estimate typically 

varies over a wide range. Standard errors of estimate 

for this study ranged from 15 to 56 percent for annual 

high-duration flows, 25 to greater than 500 percent for 

monthly low-duration flows, 32 to 66 percent for 

seasonal low-duration flows, and 53 to 64 percent for 

low-flow frequency statistics (tables 2, 4, and 5).

Table 3. Range of basin characteristics used to determine estimating 

equations for high-flow statistics in Regions 1-7, Alaska and conterminous 

basins in Canada

Region

Range of drainage area

(square miles)

Range of mean annual 

precipitation

(inches)

Minimum Maximum Minimum Maximum

1, 3 1.82 571 70 300

2 92.7 19,900 12 100

4 13.4 19,400 20 158

5 269 11,400 10 24

6 (small 

basins)

9.19 100 15 80

6 (medium 

basins)

100 10,000 15 30

6 (large 

basins)

10,000 321,000 15 25

7 2.79 9,520 8 35
Estimating Flow Statistics for Ungaged Sites 15

1

3

2

6 5

4

7

Table 4. Estimating equations for monthly low-duration flows for July, August, and 

September in Regions 1–7, Alaska and conterminous basins in Canada

[Estimating equation: MONTHn, n percent low-duration flow for the indicated month, in 

cubic feet per second; A, drainage area in square miles; P, mean annual precipitation, in inches; 

E, mean basin elevation, in feet above sea level; G, area of glaciers, in percentage of total basin 

area. >, greater than]

Estimating equation Coefficient of 

determination

Standard error 

of estimate, 

in percent

Region 1 (65 streamflow gaging stations)

JULY98 = 1.466 × 10-10 A 1.136 P 1.616 E 2.061 0.94 63

JULY95 = 7.809 × 10-10 A 1.114 P 1.610 E 1.879 0.95 53

JULY90 = 2.287 × 10-9 A 1.084 P 1.566 E 1.801 0.96 48

JULY85 = 4.888 × 10-9 A 1.068 P 1.555 E 1.730 0.96 46

JULY80 = 1.080 × 10-8 A 1.055 P 1.513 E 1.671 0.96 43

JULY70 = 2.971 × 10-8 A 1.041 P 1.454 E 1.601 0.96 40

JULY60 = 8.580 × 10-8 A 1.023 P 1.398 E 1.523 0.97 36

JULY50 = 2.682 × 10-7 A 1.003 P 1.323 E 1.445 0.97 33

AUG98 = 3.010 × 10-10 A 1.193P 1.477 E 1.986 0.93 69

AUG95 = 1.397 × 10-9 A 1.160 P 1.367 E 1.896 0.94 60

AUG90 = 3.162 × 10-9 A 1.138 P 1.374 E 1.820 0.95 56

AUG85 = 1.313 × 10-8 A 1.093 P 1.290 E 1.724 0.95 51

AUG80 = 2.718 × 10-8 A 1.070 P 1.241 E 1.685 0.95 48

AUG70 = 8.525 × 10-8 A 1.045P 1.180 E 1.606 0.95 46

AUG60 = 2.664 × 10-7 A 1.028P 1.151 E 1.503 0.96 42

AUG50 = 6.836 × 10-7 A 1.013P 1.151 E 1.405 0.96 40

SEPT98 = 3.379 × 10-8 A 1.091P 1.456 E 1.380 0.91 67

SEPT95 = 3.405 × 10-7 A 1.051 P 1.259 E 1.258 0.93 54

SEPT90 = 2.052 × 10-6 A 1.044 P 1.208 E 1.095 0.94 46

SEPT85 = 5.742 × 10-6 A 1.023 P 1.175 E 1.012 0.94 43

SEPT80 = 1.035 × 10-5 A 1.017 P 1.192 E 0.9441 0.95 40

SEPT70 = 2.979 × 10-5 A 0.9962 P 1.171 E 0.8582 0.95 36

SEPT60 = 6.642 × 10-5 A 0.9818 P 1.175 E 0.7838 0.96 33

SEPT50 = 1.515 × 10-4 A 0.9701 P 1.168E 0.7121 0.96 30
16 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

1

3

2

6 5

4

7

Table 4. Estimating equations for monthly low-duration flows for July, August, and 

September in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Estimating equation: MONTHn, n percent low-duration flow for the indicated month, in 

cubic feet per second; A, drainage area in square miles; P, mean annual precipitation, in inches; 

E, mean basin elevation, in feet above sea level; G, area of glaciers, in percentage of total basin 

area. >, greater than]

Estimating equation Coefficient of 

determination

Standard error 

of estimate, 

in percent

Region 2 (23 streamflow gaging stations)

JULY98 = 4.451 × 10-7 A 1.033 P 1.349 E 1.302 0.97 34

JULY95 = 2.052 × 10-7 A 1.02 P 1.340 E 1.419 0.97 31

JULY90 = 2.251 × 10-7 A 1.022 P 1.327 E 1.432 0.97 30

JULY85 = 2.479 × 10-7 A 1.019 P 1.317 E 1.436 0.97 29

JULY80 = 3.103 × 10-7 A 1.015 P 1.304 E 1.425 0.97 28

JULY70 = 4.953 × 10-7 A 1.009 P 1.284 E 1.393 0.97 28

JULY60 = 6.901 × 10-7 A 1.004 P 1.258 E 1.379 0.98 27

JULY50 = 1.034 × 10-6 A 0.9975 P 1.230 E 1.356 0.98 25

AUG98 = 6.350 × 10-2 A 0.9755 P 1.085 0.93 46

AUG95 = 6.418 × 10-2 A 0.9532 P 1.176 0.93 46

AUG90 = 7.253 × 10-2 A 0.9493 P 1.185 0.93 47

AUG85 = 8.312 × 10-2 A 0.9465 P 1.177 0.93 48

AUG80 = 9.504 × 10-2 A 0.9410 P 1.168 0.92 48

AUG70 = 0.1082 A 0.9382 P 1.164 0.92 48

AUG60 = 0.1227 A 0.9360 P 1.158 0.93 48

AUG50 = 0.1334 A 0.9358 P 1.159 0.93 47

SEPT98 = 8.800 × 10-2 A 0.9807 P 0.7966 0.95 38

SEPT95 = 8.488 × 10-2 A 0.9829 P 0.8424 0.95 38

SEPT90 = 8.061 × 10-2 A 0.9837 P 0.9001 0.95 40

SEPT85 = 8.219 × 10-2 A 0.9824 P 0.9290 0.95 41

SEPT80 = 8.455 × 10-2 A 0.9791 P 0.9536 0.95 40

SEPT70 = 9.162 × 10-2 A 0.9734 P 0.9807 0.95 39

SEPT60 = 9.777 × 10-2 A 0.9675 P 1.006 0.95 39

SEPT50 = 0.1079 A 0.9591 P 1.027 0.95 38
Estimating Flow Statistics for Ungaged Sites 17

1

3

2

6 5

4

7

Table 4. Estimating equations for monthly low-duration flows for July, August, and 

September in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Estimating equation: MONTHn, n percent low-duration flow for the indicated month, in 

cubic feet per second; A, drainage area in square miles; P, mean annual precipitation, in inches; 

E, mean basin elevation, in feet above sea level; G, area of glaciers, in percentage of total basin 

area. >, greater than]

Estimating equation Coefficient of 

determination

Standard error 

of estimate, 

in percent

Regions 3 and 4 (58 streamflow gaging stations)

JULY98 = 9.428 × 10-5 A 1.118 P 1.211 E 0.6445 0.95 64

JULY95 = 1.257 × 10-4 A 1.112 P 1.226 E 0.6198 0.96 58

JULY90 = 1.493 × 10-4 A 1.099 P 1.213 E 0.6298 0.96 53

JULY85 = 1.842 × 10-4 A 1.091 P 1.212 E 0.6192 0.96 51

JULY80 = 2.078 × 10-4 A 1.085 P 1.215 E 0.6146 0.97 49

JULY70 = 2.576 × 10-4 A 1.075 P 1.222 E 0.6031 0.97 45

JULY60 = 3.327 × 10-4 A 1.066 P 1.224 E 0.5869 0.97 43

JULY50 = 4.135 × 10-4 A 1.058 P 1.221 E 0.5771 0.97 41

AUG98 = 3.471 × 10-4 A 1.130 P 1.054 E 0.5038 0.95 63

AUG95 = 2.869 × 10-4 A 1.140 P 1.103 E 0.5219 0.96 55

AUG90 = 2.773 × 10-4 A 1.137 P 1.139 E 0.5263 0.96 53

AUG85 = 2.794 × 10-4 A 1.134 P 1.168 E 0.5244 0.96 51

AUG80 = 3.035 × 10-4 A 1.128 P 1.179 E 0.5208 0.97 49

AUG70 = 3.774 × 10-4 A 1.118 P 1.199 E 0.5046 0.97 46

AUG60 = 4.432 × 10-4 A 1.110 P 1.227 E 0.4880 0.97 43

AUG50 = 5.313 × 10-4 A 1.101 P 1.246 E 0.4744 0.97 41

SEPT98 = 1.655 × 10-2 A 1.126 P 0.9572 0.96 46

SEPT95 = 1.474 × 10-2 A 1.125 P 1.030 0.96 46

SEPT90 = 1.528 × 10-2 A 1.110 P 1.080 0.97 44

SEPT85 = 1.555 × 10-2 A 1.108 P 1.109 0.97 44

SEPT80 = 1.599 × 10-2 A 1.103 P 1.131 0.97 43

SEPT70 = 1.636 × 10-2 A 1.094 P 1.175 0.97 41

SEPT60 = 1.676 × 10-2 A 1.086 P 1.214 0.97 40

SEPT50 = 1.745 × 10-2 A 1.076 P 1.251 0.97 39
18 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

1

3

2

6 5

4

7

Table 4. Estimating equations for monthly low-duration flows for July, August, and 

September in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Estimating equation: MONTHn, n percent low-duration flow for the indicated month, in 

cubic feet per second; A, drainage area in square miles; P, mean annual precipitation, in inches; 

E, mean basin elevation, in feet above sea level; G, area of glaciers, in percentage of total basin 

area. >, greater than]

Estimating equation Coefficient of 

determination

Standard error 

of estimate, 

in percent

Region 5 (35 streamflow gaging stations)

JULY98 = 4.916 × 10-10 A 1.250 P 1.885 E 1.705 0.94 64

JULY95 = 7.603 × 10-10 A 1.232 P 1.687 E 1.754 0.94 62

JULY90 = 9.022 × 10-10 A 1.227 P 1.687 E 1.753 0.94 59

JULY85 = 1.737 × 10-9 A 1.220 P 1.716 E 1.683 0.94 57

JULY80 = 5.006 × 10-9 A 1.201 P 1.695 E 1.590 0.95 54

JULY70 = 1.964 × 10-8 A 1.190 P 1.689 E 1.452 0.95 51

JULY60 = 7.896 × 10-8 A 1.181 P 1.682 E 1.306 0.96 48

JULY50 = 3.238 × 10-7 A 1.171 P 1.642 E 1.170 0.96 45

AUG98 = 2.021 × 10-10 A 1.271 P 1.910 E 1.755 0.93 68

AUG95 = 1.685 × 10-9 A 1.257 P 1.833 E 1.552 0.94 63

AUG90 = 4.340 × 10-9 A 1.238 P 1.644 E 1.535 0.94 60

AUG85 = 8.224 × 10-9 A 1.231 P 1.621 E 1.481 0.94 58

AUG80 = 3.519 × 10-8 A 1.219 P 1.625 E 1.324 0.95 55

AUG70 = 5.765 × 10-7 A 1.198 P 1.598 E 1.028 0.95 52

AUG60 = 1.740 × 10-3 A 1.164 P 1.911 0.95 52

AUG50 = 2.499 × 10-3 A 1.161 P 1.819 0.95 49

SEPT98 = 2.076 × 10-9 A 1.234 P 1.806 E 1.516 0.94 59

SEPT95 = 2.731 × 10-4 A 1.188 P 2.272 0.94 60

SEPT90 = 5.742 × 10-4 A 1.182 P 2.057 0.95 53

SEPT85 = 1.009 × 10-3 A 1.171 P 1.917 0.95 52

SEPT80 = 1.188 × 10-3 A 1.170 P 1.886 0.95 49

SEPT70 = 1.757 × 10-3 A 1.166 P 1.793 0.96 46

SEPT60 = 2.110 × 10-3 A 1.162 P 1.775 0.96 43

SEPT50 = 2.506 × 10-3 A 1.158 P 1.754 0.97 41
Estimating Flow Statistics for Ungaged Sites 19

1

3

2

6 5

4

7

Table 4. Estimating equations for monthly low-duration flows for July, August, and 

September in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Estimating equation: MONTHn, n percent low-duration flow for the indicated month, in 

cubic feet per second; A, drainage area in square miles; P, mean annual precipitation, in inches; 

E, mean basin elevation, in feet above sea level; G, area of glaciers, in percentage of total basin 

area. >, greater than]

Estimating equation Coefficient of 

determination

Standard error 

of estimate, 

in percent

Region 6 (36 streamflow gaging stations)

JULY98 = 1.008 × 10-3 A 1.158 P 1.612 (G+1) 0.5516 0.97 68

JULY95 = 1.255 × 10-3 A 1.146 P 1.613 (G+1) 0.5577 0.98 58

JULY90 = 1.635 × 10-3 A 1.138 P 1.602 (G+1) 0.5266 0.98 51

JULY85 = 2.189 × 10-3 A 1.127 P 1.572 (G+1) 0.5107 0.98 48

JULY80 = 2.695 × 10-3 A 1.118 P 1.555 (G+1) 0.4955 0.98 45

JULY70 = 3.512 × 10-3 A 1.106 P 1.553 (G+1) 0.4592 0.99 41

JULY60 = 5.051 × 10-3 A 1.092 P 1.509 (G+1) 0.4373 0.99 37

JULY50 = 6.682 × 10-3 A 1.081 P 1.486 (G+1) 0.4163 0.99 34

AUG98 = 9.131 × 10-4 A 1.188 P 1.555 (G+1) 0.3826 0.96 78

AUG95 = 1.674 × 10-3 A 1.157 P 1.486 (G+1) 0.4148 0.97 63

AUG90 = 1.690 × 10-3 A 1.144 P 1.566 (G+1) 0.4229 0.98 59

AUG85 = 2.193 × 10-3 A 1.129 P 1.552 (G+1) 0.4282 0.98 54

AUG80 = 2.636 × 10-3 A 1.119 P 1.542 (G+1) 0.4306 0.98 50

AUG70 = 3.890 × 10-3 A 1.102 P 1.507 (G+1) 0.4160 0.98 43

AUG60 = 4.962 × 10-3 A 1.095 P 1.494 (G+1) 0.3921 0.99 39

AUG50 = 6.399 × 10-3 A 1.085 P 1.487 (G+1) 0.3567 0.99 37

SEPT98 = 7.145 × 10-4 A 1.182 P 1.673 0.97 63

SEPT95 = 1.115 × 10-3 A 1.167 P 1.615 0.98 53

SEPT90 = 2.254 × 10-3 A 1.141 P 1.497 0.98 47

SEPT85 = 2.815 × 10-3 A 1.128 P 1.495 0.98 45

SEPT80 = 3.222 × 10-3 A 1.121 P 1.496 0.98 43

SEPT70 = 4.130 × 10-3 A 1.111 P 1.487 0.98 41

SEPT60 = 4.437 × 10-3 A 1.106 P 1.517 0.99 39

SEPT50 = 5.094 × 10-3 A 1.097 P 1.532 0.99 36
20 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

1

3

2

6 5

4

7

Table 4. Estimating equations for monthly low-duration flows for July, August, and 

September in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Estimating equation: MONTHn, n percent low-duration flow for the indicated month, in 

cubic feet per second; A, drainage area in square miles; P, mean annual precipitation, in inches; 

E, mean basin elevation, in feet above sea level; G, area of glaciers, in percentage of total basin 

area. >, greater than]

Estimating equation Coefficient of 

determination

Standard error 

of estimate, 

in percent

Region 7 (13 streamflow gaging stations)

1JULY98 = 1.499 × 10-5 A 1.082 P 3.243 0.92 120

1,2JULY95 = 2.500 × 10-5 A 1.078 P 3.119 0.93 100

1JULY90 = 9.181 × 10-5 A 1.025 P 2.894 0.94 87

1JULY85 = 1.485 × 10-4 A 1.004 P 2.820 0.94 87

1JULY80 = 2.200 × 10-4 A 0.9941 P 2.744 0.94 85

1JULY70 = 4.590 × 10-4 A 0.9756 P 2.600 0.94 84

1JULY60 = 8.492 × 10-4 A 0.9624 P 2.480 0.94 82

1JULY50 = 1.462 × 10-3 A 0.9580 P 2.364 0.94 78

1,2AUG98 = 3.034 × 10-7 A 1.082 P 4.100 0.67 > 500

1,2AUG95 = 2.000 × 10-6 A 1.030 P 3.768 0.78 342

1,2AUG90 = 1.000 × 10-5 A 0.9896 P 3.500 0.84 198

1AUG85 = 3.356 × 10-5 A 0.9769 P 3.341 0.87 150

1AUG80 = 4.146 × 10-5 A 0.9650 P 3.337 0.87 150

1AUG70 = 7.943 × 10-5 A 0.9515 P 3.223 0.87 160

1AUG60 = 1.847 × 10-4 A 0.9451 P 3.020 0.87 150

1AUG50 = 4.039 × 10-4 A 0.9478 P 2.824 0.86 150

1SEPT98 = 1.381 × 10-5 A 1.077 P 3.162 0.79 350

1SEPT95 = 6.081 × 10-5 A 1.047 P 2.996 0.81 260

1SEPT90 = 6.081 × 10-5 A 1.023 P 2.905 0.81 260

1SEPT85 = 1.069 × 10-4 A 0.9929 P 2.840 0.82 220

1SEPT80 = 1.876 × 10-4 A 0.9844 P 2.718 0.82 210

1,2SEPT70 = 3.162 × 10-4 A 0.9800 P 2.625 0.84 183

1SEPT60 = 5.970 × 10-4 A 0.9765 P 2.505 0.86 160

1SEPT50 = 1.525 × 10-3 A 0.9659 P 2.279 0.87 140

1Equations in Region 7 have unacceptably large standard error of estimate. See text 

page 22 for recommended alternate methods. 2Equation was adjusted from least-squares fit to maintain consistency between various 

percentiles.
Estimating Flow Statistics for Ungaged Sites 21

Table 5. Estimating equations for seasonal low-duration flows and low-flow frequencies for 

July-through-September in Region 1, Alaska

[Estimating equation: J-Sn: daily mean discharge for the season July–through-September having an 

n-percent exceedance probability, in cubic feet per second; J-S7Qn: daily mean discharge for the 

season July–through-September for the 7-day, n-year low flow, in cubic feet per second; A, drainage 

area, in square miles; P, mean annual precipitation, in inches; E, mean basin elevation, in feet above 

sea level]

Estimating equation Coefficient of 

determination

Standard error 

of estimate, 

in percent

Region 1 (65 gaging stations)

J-S98 = 2.532 × 10-9 A 1.142 P 1.521 E 1.674 0.93 66

J-S95 = 7.423 × 10-9 A 1.104 P 1.485 E 1.612 0.94 55

J-S90 = 2.479 × 10-8 A 1.080 P 1.451 E 1.520 0.95 49

J-S85 = 5.016 × 10-8 A 1.058 P 1.380 E 1.506 0.95 45

J-S80 = 8.813 × 10-8 A 1.044 P 1.347 E 1.477 0.96 43

J-S70 = 2.456 × 10-7 A 1.028 P 1.300 E 1.407 0.96 39

J-S60 = 6.997 × 10-7 A 1.013 P 1.264 E 1.323 0.97 35

J-S50 = 2.089 × 10-6 A 0.9961 P 1.226 E 1.232 0.97 32

J-S7Q10 = 3.610 × 10-9 A 1.137 P 1.492 E 1.637 0.93 64

J-S7Q2 = 4.984 × 10-8 A 1.090 P 1.424 E 1.433 0.94 53

1

3

2

6 5

4

7

Table 6. Range of basin characteristics used to determine estimating equations for low-flow statistics in Regions 1-7, Alaska and 

conterminous basins in Canada

[–, basin characteristic not used in equations for this region]

Region

Range of drainage area

(square miles)

Range of mean annual 

precipitation

(inches)

Range of mean basin 

elevation

(feet)

Range of area of glaciers

(percent)

Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum

1 1.82 571 70 300 358 3,900 – –

2 92.7 19,900 12 100 3,500 6,180 – –

3, 4 4.74 19,400 20 220 140 3,920 – –

5 29.7 114,000 10 24 1,800 4,540 – –

6 9.19 321,000 15 80 – – 0 69

7 5.83 9,520 8 35 – – – –
22 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

The estimating equations presented in tables 2, 4, 

and 5 can be used for estimating flow in streams in 

Alaska and conterminous basins in Canada that are not 

affected by natural or anthropogenic streamflow 

regulation. Streamflow in basins with flow diversions, 

dams, periodically releasing glacial impoundments, or 

other streamflow conditions not correlated to basin 

characteristics cannot be estimated accurately with 

these equations. The R2 and standard error of estimate 

for each equation are valid only when the equations are 

used for sites with values of independent variables that 

fall within the ranges in tables 3 and 6. The range 

of drainage area and mean annual precipitation 

for the stations in Region 6 is wide, but only the 

smaller basins receive precipitation amounts near the 

upper bounds of the range. Medium-size basins 

(drainage area between 100 and 10,000 mi2) receive 

between 15 and 30 in. of precipitation annually, and 

the largest basins (10,000 to 321,000 mi2) receive 

between 15 and 25 in. of precipitation annually. The 

equations presented should not be used for large basins 

having mean annual precipitation greater than 25 in., or 

for medium basins having precipitation greater than 30 

in., but then most large and medium basins in Alaska 

do not receive large amounts of mean annual 

precipitation. In fact, the only large basins in Alaska 

are stations on the Yukon River, which were included 

in the analysis and whose mean annual precipitation 

values define the range presented in table 3.

Equations for Region 7 must be used with 

particular caution because the equations were 

developed using a small number of stations over a very 

wide area which limits their statistical validity. 

Standard errors of estimate for these equations are 

remarkably large, but equations that may have 

explained more of the variability in the small data set 

were not physically or hydrologically reasonable. Lowflow statistics may be improved for ungaged sites in 

this region by collecting additional data on the ungaged 

stream and correlating them with data collected for the 

same period at a nearby, hydrologically similar gaging 

station. Methods of correlation are described by Riggs 

(1972), Hirsch (1982), Hirsch and Gilroy (1984), and 

Stedinger and Thomas (1985) and were applied to 

selected Alaska streams on the Kenai Peninsula by 

Savard and Scully (1984). Correlation methods may 

also be appropriate for high-flow statistics if the 

conditions causing the high flows are regional in 

nature.

PROCEDURES FOR ESTIMATING FLOW 

STATISTICS

Within the limitations previously described, the 

flow statistics and equations presented in this report 

can be used to estimate high-flow and low-flow 

statistics for gaged and ungaged streams throughout the 

State. Procedures for using this report to estimate flow 

statistics for streamflow-gaging stations and several 

types of ungaged sites follow.

1. For streamflow-gaging stations, estimates can be 

read directly from tables 7, 8, or 9.

2. For ungaged sites having a drainage area in only 

one region and not near a gaging station on the 

same stream, basin characteristics can be 

determined from a topographic map (or from 

digital data, as described in table 1) and the 

precipitation map on plate 2 of Jones and 

Fahl (1994), available at http://ak.water.usgs.gov/ 

Publications/pdf.reps/wrir93.4179.plate2.pdf or 

http://agdc.usgs.gov/ data/usgs/water/ 

statewide.html. Basin characteristics for the 

ungaged site then can be substituted into the 

equations from tables 2, 4, or 5 for the appropriate 

region.

3. For ungaged sites having a drainage area that falls 

in two regions, basin characteristics for the entire 

basin can be determined as described in procedure 

2 and substituted into equations from tables 2, 4, or 

5 for each region. The two estimates should then 

be weighted by the respective drainage area in 

each region using the equation

, (1)

where 

Q is the weighted flow statistic, 

Q1 is the value for the flow statistic if the entire 

basin were located in Region 1, 

A1 is the amount of drainage area in Region 1, 

Q2 is the value for the flow statistic if the entire 

basin were located in Region 2, and 

A2 is the amount of drainage area in Region 2. 

Q Q1A1 + Q2A2

A1 A2 + = --------------------------------
Summary 23

4. For ungaged sites on a gaged stream having a 

drainage area between 50 and 150 percent of the 

drainage area of the gaging station, the estimate 

from the streamflow-gaging station obtained as for 

procedure 1 and the estimate for the ungaged site 

obtained as for procedure 2 or 3 can be weighted 

for an improved estimate (Ries and Friesz, 2000, 

p. 37). First, a correction factor for the gaging 

station, CG, is computed from the equation

, (2)

where 

Next, a correction factor for the ungaged site, 

CU, is computed from the equation

 , (3)

where

SUMMARY

Streamflow statistics were computed for annual 

high-duration flows at 230 streamflow-gaging stations, 

for monthly low-duration flows at 231 stations, for 

seasonal low-duration flows at 66 stations, and for 

seasonal low-flow frequencies at 65 stations in Alaska 

and conterminous basins in Canada. High-duration 

flow statistics were computed for the October-throughSeptember water year statewide and low-duration flow 

statistics were computed for the individual months of 

July, August, and September statewide. Seasonal lowduration flow statistics were computed for the period 

July-through-September for Region 1 (southeastern 

Alaska). Low-flow frequency statistics also were 

computed for the season July-through-September in 

Region 1. Individual months for low-flow analyses 

were used to eliminate winter low flows, when ice 

effects limit the quality of the data, and to avoid the 

trend toward low flows at the end of the open-water 

season that appeared in many interior streams. This 

trend was not apparent in Region 1, permitting a 

seasonal analysis there.

For stations not included in the 1994 peak-flow 

analysis by Jones and Fahl, new basin characteristics 

were determined using digital methods and 

modifications of methods used by Jones and Fahl. For 

the small number of stations updated, the differences in 

methods are not significant to the analysis, but in 

general, basin characteristics should be determined by 

the user in a manner as consistent as possible with the 

previous methods of Jones and Fahl to preserve the 

statistical validity of the estimating procedure.

The State was divided into seven regions for 

estimating streamflow statistics, and estimating 

equations were developed from ordinary-least-squares 

regression models of the respective flow statistics and 

basin characteristics. Estimating equations for annual 

15-, 10-, 9-, 8-, 7-, 6-, 5-, 4-, 3-, 2-, and 1-percent 

duration flows and monthly 98-, 95-, 90-, 85-, 80-, 70-, 

60-, and 50-percent duration flows for July, August, 

and September were developed for all seven regions. 

Seasonal 98-, 95-, 90-, 85-, 80-, 70-, 60-, and 50-

percent duration flows and 7-day, 2-year and 7-day, 

10-year low-flow frequencies for July-throughSeptember were developed for Region 1. A total of 

222, 226, and 65 stations were used in the annual highflow, monthly low-flow analyses, and seasonal lowflow analyses, respectively. Region 7 (northern and 

northwestern Alaska) contains few gaging stations but 

is not hydrologically similar to adjacent regions. The 

estimating equations for Region 7 are not as strong 

statistically as equations for other regions because of 

the small number of stations, and therefore should be 

used with caution. Equations for estimating streamflow 

statistics in other regions can be used within limitations 

of basin characteristics and streamflow alteration 

described in the report.

QGt is the value of the flow statistic for the 

gaging station from table 7, 8, or 9, and

QGr is the value of the flow statistic for the 

gaging station computed from the 

regression equation. 

∆A is the absolute value of the difference 

between the drainage area of the gaging 

station and the ungaged site, and

a is 0.5 for ungaged site drainage areas larger 

than the gaging-station drainage areas 

and 0.7 for drainage areas smaller than 

the gaging-station drainage area.

CG QGt QGr = ⁄

CU CG

∆A CG ( ) – 1

a AG ( ) = – ----------------------------
24 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

REFERENCES CITED

Ashton, W.S., and Carlson, R.F., 1984, Determination of 

seasonal, frequency and durational aspects of 

streamflow with regard to fish passage through roadway 

drainage structures, Final Report: Institute of Water 

Resources, University of Alaska, 51 p.

Carlson, R.F., 1987, Seasonal, frequency and durational 

aspects of streamflow in southeast and coastal Alaska, 

Final Report: Water Research Center, Institute of 

Northern Engineering, University of Alaska-Fairbanks, 

40 p.

Childers, J.M., Meckel, J.P., and Anderson, G.S., 1972, 

Floods of August 1967 in east-central Alaska: U.S. 

Geological Survey Water-Supply Paper 1880-A, 77 p.

Environment Canada, 2002, Hydat for Windows, Hydat CD 

Version 2.01, Surface Water and Sediment Data: Water 

Survey of Canada. CD-ROM.

Environmental Systems Research Institute, Inc., 1997, 

Understanding GIS, the ARC/INFO method: Redlands, 

Calif., 10 chapters., various pagination.

Flynn, K.M., Hummel, P.R., Lumb, A.M., and Kittle, J.L., 

Jr., 1995, User's manual for ANNIE, version 2, a 

computer program for interactive hydrologic data 

management: U.S. Geological Survey Water-Resources 

Investigations Report 95-4085, 211 p.

Hardison, C.H., 1971, Prediction error of regression 

estimates of streamflow characteristics at ungaged 

streams: U.S. Geological Survey Professional Paper 

750-C, p. C228-C236.

Hirsch, R.M., 1982, A comparison of streamflow-record 

extension techniques: Water Resources Research, v. 18, 

no. 4, p. 1081-1088.

Hirsch, R.M., and Gilroy, R.J., 1984, Methods of fitting a 

straight line to data, examples in water resources: Water 

Resources Bulletin, v. 20, no. 5, p. 705-711.

Jones, S.H., and Fahl, C.B., 1994, Magnitude and frequency 

of floods in Alaska and conterminous basins of Canada: 

U.S. Geological Survey Water-Resources Investigations 

Report 93-4179, 122 p.

Lamke, R.D., 1972, Floods of the summer of 1971 in southcentral Alaska: U.S. Geological Survey Open-File 

Report, 88 p.

———1978, Flood characteristics of Alaskan streams: U.S. 

Geological Survey Water-Resources Investigations 

Report 78-129, 61 p.

Lamke, R.D., 1991, Alaska floods and droughts, in Paulson, 

R.W., and others, eds., National water summary, 1988-

89 — Hydrologic events and floods and droughts, U.S. 

Geological Survey Water-Supply Paper 2375, p. 171-

180.

Lamke, R.D., and Bigelow, B.B., 1988, Floods of October 

1986 in south-central Alaska: U.S. Geological Survey 

Open-File Report 87-391, 31 p.

Parks, B., and Madison, R.J., 1985, Estimation of selected 

flow and water-quality characteristics of Alaskan 

streams: U.S. Geological Survey Water-Resources 

Investigations Report 84-4247, 64 p.

Rantz, S.E., and others, 1982, Measurement and 

computation of streamflow: Volume 1, Measurement of 

stage and discharge; Volume 2, Computation of 

discharge: U.S. Geological Survey Water-Supply Paper 

2175, 631 p.

Ries, K.G., III, and Friesz, P.J., 2000, Methods for estimating 

low-flow statistics for Massachusetts streams: U.S. 

Geological Survey Water-Resources Investigations 

Report 00-4135, 81 p.

Riggs, H.C., 1972, Low-flow investigations: U.S. Geological 

Survey Techniques of Water-Resources Investigations, 

book 4, chap. B1, 18 p.

Savard, C.S., and Scully, D.R., 1984, Surface-water quantity 

and quality in the lower Kenai Peninsula, Alaska: U.S. 

Geological Survey Water-Resources Investigations 

Report 84-4161, 62 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.

Thomas, D.M., and Benson, M.A., 1970, Generalizations of 

streamflow characteristics from drainage-basin 

characteristics: U.S. Geological Survey Water-Supply 

Paper 1975, 55 p.

U.S. Geological Survey, 1978, Chap. 7, Physical basin 

characteristics for hydrologic analyses, National 

handbook of recommended methods for water-data 

acquisition, U.S. Geological Survey, p. 7-1 to 7-38.

———1987, Hydrologic unit map – 1987 – State of Alaska: 

U.S. Geological Survey map, 1 sheet.
Tables 7-9 25

TABLES 7-9
26 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: O-Sn, for water year Octoberthrough-September having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2)

Mean annual 

precipitation 

(in.) (degrees, minutes, 

seconds)

150080001 Salmon River near Hyder, AK 1 56 01 34 130 03 55 94.1 110

15010000 Davis River near Hyder, AK 1 55 45 00 130 12 00 80.0 175

15011500 Red River near Metlakatla, AK 1 55 08 29 130 31 50 45.3 200

15012000 Winstanley Creek near Ketchikan, AK 1 55 24 59 130 52 03 15.5 160

15015590 Unuk River near Stewart, BC 1 56 21 05 130 41 30 571 100

15022000 Harding River near Wrangell, AK 1 56 12 48 131 38 12 67.4 175

15024200 Klappan River near Telegraph Creek, BC 2 57 54 00 129 42 14 1,370 25

15024300 Stikine River above Grand Canyon near Telegraph Creek, BC 2 58 02 38 129 56 45 7,260 20

15024500 Tuya River near Telegraph Creek, BC 2 58 04 20 130 49 27 1,390 15

15024600 Stikine River at Telegraph Creek, BC 2 57 54 03 131 09 16 11,300 15

15024640 Stikine River above Butterfly Creek, BC 2 57 29 10 131 45 00 13,900 22

15024670 Iskut River at outlet of Kinaskan Lake, BC 2 57 32 00 130 12 28 483 20

15024684 More Creek near mouth, BC 2 57 02 27 130 24 05 326 70

15024690 Forrest Kerr Creek near Wrangell, BC 2 56 54 56 130 43 15 120 100

15024695 Iskut River above Snippaker Creek, BC 2 56 41 55 130 52 23 2,790 60

15024700 Iskut River below Johnson River, BC 2 56 44 20 131 40 25 3,610 60

15024750 Goat Creek near Wrangell, AK 1 56 39 40 131 58 14 17.3 175

15024800 Stikine River near Wrangell, AK 2 56 42 29 132 07 49 19,900 40

15028300 Farragut River near Petersburg, AK 1 57 10 24 133 06 36 151 175

15030000 Sweetheart Falls Creek near Juneau, AK 1 57 56 35 133 40 55 36.3 150

15031000 Long River above Long Lake near Juneau, AK 1 58 10 56 133 53 06 8.29 175

15034000R Long River near Juneau, AK 1 58 10 00 133 41 50 32.5 180

15036000 Speel River near Juneau, AK 1 58 12 10 133 36 40 226 175

15038000R Crater Creek near Juneau, AK 1 58 08 15 133 46 15 11.4 175

15039900 Dorothy Lake outlet near Juneau, AK 1 58 14 56 133 58 54 11.0 160

15040000 Dorothy Creek near Juneau, AK 1 58 13 40 134 02 25 15.2 150

15041000 Sloko River near Atlin, BC 2 59 06 20 133 39 40 165 28

15041100 Taku River near Tulsequah, BC 2 58 38 20 133 32 25 6,000 24

150412001 Taku River near Juneau, AK 1 58 32 19 133 42 00 6,600 35

15044000 Carlson Creek near Juneau, AK 1 58 19 00 134 10 15 24.3 200

15048000 Sheep Creek near Juneau, AK 1 58 16 30 134 18 50 4.57 150

15049900R Gold Creek near Juneau, AK 1 58 18 26 134 23 12 8.41 140

15050000R Gold Creek at Juneau, AK 1 58 18 25 134 24 05 9.76 150

15052000 Lemon Creek near Juneau, AK 1 58 23 30 134 25 15 12.1 180

15052500 Mendenhall River near Auke Bay, AK 1 58 25 47 134 34 22 85.1 180

15052800 Montana Creek near Auke Bay, AK 1 58 23 53 134 36 34 14.1 100

15053800 Lake Creek at Auke Bay, AK 1 58 23 40 134 37 50 2.50 80

150540002 Auke Creek at Auke Bay, AK 1 58 22 56 134 38 10 3.96 80

15056100 Skagway River at Skagway, AK 1 59 28 02 135 17 00 145 100

15056200 West Creek near Skagway, AK 1 59 31 35 135 21 10 43.2 100

1Record includes glacial outbursts. Station not included in regression analysis. 2Record includes regulated years. Station not included in regression analysis. 3Drainage area is indeterminate. Station not included in regression analysis.
Table 7 27

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

Daily mean discharge, in cubic feet per second

Station No.

O-S15 O-S10 0-S9 0-S8 0-S7 0-S6 0-S5 0-S4 0-S3 0-S2 0-S1

150080001 2,130 2,560 2,660 2,760 2,860 2,990 3,240 3,490 3,740 4,540 6,610

15010000 1,890 2,130 2,190 2,260 2,320 2,390 2,490 2,710 2,940 3,340 3,940

15011500 1,040 1,270 1,320 1,400 1,490 1,570 1,720 1,870 2,100 2,430 3,130

15012000 268 315 326 339 360 382 403 442 484 560 693

15015590 7,710 8,790 9,080 9,360 9,650 10,000 10,500 11,000 11,500 12,600 14,100

15022000 1,380 1,610 1,660 1,740 1,820 1,900 2,010 2,190 2,390 2,680 3,220

15024200 5,760 6,920 7,240 7,600 7,950 8,440 8,940 9,560 10,300 11,300 12,900

15024300 23,000 29,200 30,600 32,100 33,900 35,800 38,000 40,700 43,600 47,900 55,800

15024500 2,260 3,360 3,730 4,130 4,580 5,070 5,620 6,240 6,970 8,000 9,780

15024600 30,500 38,100 40,200 42,500 44,900 47,500 50,200 53,900 58,100 64,400 74,400

15024640 50,300 60,000 62,400 65,200 68,000 70,800 74,600 78,800 84,200 92,200 105,000

15024670 1,250 1,520 1,580 1,640 1,720 1,810 1,890 2,020 2,150 2,370 2,720

15024684 4,180 4,810 4,940 5,080 5,220 5,430 5,650 5,870 6,090 6,700 7,720

15024690 2,680 3,110 3,190 3,290 3,430 3,560 3,700 3,840 4,070 4,410 4,910

15024695 23,200 26,900 27,700 28,500 29,500 30,800 32,200 33,500 35,800 38,300 43,200

15024700 35,200 40,200 41,500 42,800 44,100 45,400 47,400 49,600 51,800 55,000 61,500

15024750 357 417 433 450 466 487 520 552 585 670 883

15024800 123,000 137,000 141,000 144,000 148,000 152,000 155,000 164,000 173,000 184,000 198,000

15028300 2,920 3,360 3,500 3,630 3,770 3,970 4,250 4,530 5,070 5,890 7,370

15030000 636 725 744 767 801 836 870 933 1,000 1,100 1,230

15031000 246 297 308 318 337 357 376 396 430 486 603

15034000R 927 1,070 1,110 1,150 1,190 1,250 1,330 1,410 1,540 1,690 2,020

15036000 5,820 6,710 6,890 7,140 7,430 7,720 8,020 8,310 8,850 9,720 11,200

15038000R 410 475 495 516 536 557 602 649 705 788 957

15039900 253 288 297 307 318 335 352 369 401 432 505

15040000 291 325 339 353 367 382 407 434 467 518 611

15041000 848 1,040 1,100 1,150 1,200 1,260 1,340 1,410 1,520 1,700 2,000

15041100 21,200 24,900 25,600 26,700 27,800 28,900 30,100 32,200 34,400 37,700 42,500

150412001 29,300 33,600 34,500 36,000 37,500 39,000 41,000 43,700 46,500 51,200 58,200

15044000 706 850 882 914 957 1,010 1,060 1,120 1,210 1,300 1,610

15048000 94.5 108 111 114 121 129 137 146 162 181 226

15049900R 200 241 251 266 284 303 330 356 402 469 576

15050000R 227 263 273 293 312 332 351 371 399 478 556

15052000 373 445 462 478 495 530 565 601 644 733 856

15052500 2,800 3,260 3,390 3,510 3,640 3,760 3,970 4,240 4,510 5,050 6,000

15052800 189 229 238 251 264 278 297 323 362 418 505

15053800 27.4 34.2 36.6 39.0 41.3 45.2 49.6 54.2 62.6 71.0 104

150540002 33.4 41.0 42.6 44.1 46.7 50.4 54.2 57.9 65.7 75.4 93.7

15056100 1,360 1,670 1,740 1,820 1,930 2,040 2,150 2,280 2,500 2,730 3,270

15056200 825 977 1,020 1,060 1,090 1,130 1,200 1,280 1,360 1,490 1,650
28 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15056560 Klehini River near Klukwan, AK 1 59 24 47 135 59 49 284 80

15058000 Purple Lake outlet near Metlakatla, AK 1 55 06 00 131 26 00 6.67 150

15059500 Whipple Creek near Ward Cove, AK 1 55 26 30 131 47 38 5.29 125

15060000 Perseverance Creek near Wacker, AK 1 55 24 40 131 40 05 2.81 190

15066000 Beaver Falls Creek near Ketchikan, AK 1 55 22 55 131 28 25 5.80 190

15067900 Upper Mahoney Lake outlet near Ketchikan, AK 1 55 24 50 131 33 16 2.03 200

15068000 Mahoney Creek near Ketchikan, AK 1 55 25 34 131 30 40 5.70 200

15070000R Swan Lake near Ketchikan, AK 1 55 36 54 131 20 14 36.5 200

15072000 Fish Creek near Ketchikan, AK 1 55 23 31 131 11 38 32.1 180

15074000 Ella Creek near Ketchikan, AK 1 55 30 20 131 01 25 19.7 175

15076000 Manzanita Creek near Ketchikan, AK 1 55 36 00 130 59 00 33.9 200

15078000 Grace Creek near Ketchikan, AK 1 55 39 28 130 58 14 30.2 200

15080000 Orchard Creek near Bell Island, AK 1 55 50 00 131 27 00 59.0 150

15081497 Staney Creek near Klawock, AK 1 55 48 05 133 06 31 50.6 100

15081500 Staney Creek near Craig, AK 1 55 48 57 133 07 58 51.6 100

15081580 Black Bear Lake outlet near Klawoc, AK 1 55 33 25 132 52 33 1.82 100

15083500 Perkins Creek near Metlakatla, AK 1 54 56 48 132 10 15 3.38 150

15085100 Old Tom Creek near Kasaan, AK 1 55 23 44 132 24 25 5.90 100

15085600 Indian Creek near Hollis, AK 1 55 26 58 132 41 41 8.82 100

15085700 Harris River near Hollis, AK 1 55 27 47 132 42 11 28.7 120

15085800 Maybeso Creek at Hollis, AK 1 55 29 26 132 40 31 15.1 120

15086600 Big Creek near Point Baker, AK 1 56 07 54 133 08 56 11.2 110

15087545 Municipal Watershed Creek near Petersburg, AK 1 56 46 40 132 55 07 2.20 100

15087570 Hamilton Creek near Kake, AK 1 56 52 21 133 40 30 65.0 70

15087590 Rocky Pass Creek near Point Baker, AK 1 56 37 10 133 44 10 2.72 100

15087690 Indian River near Sitka, AK 1 57 04 01 135 17 42 10.1 140

15088000R Sawmill Creek near Sitka, AK 1 57 03 05 135 13 40 39.0 150

15090000R Green Lake near Sitka, AK 1 56 59 14 135 06 37 28.8 160

15093400 Sashin Creek near Big Port Walter, AK 1 56 22 32 134 39 40 3.72 300

15094000 Deer Lake outlet near Port Alexander, AK 1 56 31 10 134 40 10 7.41 300

15098000 Baranof River at Baranof, AK 1 57 05 15 134 50 30 32.0 180

15100000 Takatz Creek near Baranof, AK 1 57 08 35 134 51 50 17.5 180

15101490R Greens Creek at Greens Creek Mine near Juneau, AK 1 58 05 00 134 37 54 8.62 98

15101500 Greens Creek near Juneau, AK 1 58 05 18 134 44 49 22.8 80

15102000 Hasselborg Creek near Angoon, AK 1 57 39 40 134 14 55 56.2 100

15106920 Kadashan River above Hook Creek near Tenakee, AK 1 57 39 46 135 11 06 10.2 100

15106940 Hook Creek above tributary near Tenakee, AK 1 57 40 39 135 07 42 4.48 100

15106960 Hook Creek near Tenakee, AK 1 57 40 22 135 10 40 8.00 100

15106980 Tonalite Creek near Tenakee, AK 1 57 40 42 135 13 17 14.5 100

15107000 Kadashan River near Tenakee, AK 1 57 41 43 135 12 59 37.7 100

1Record includes glacial outbursts. Station not included in regression analysis. 2Record includes regulated years. Station not included in regression analysis. 3Drainage area is indeterminate. Station not included in regression analysis.

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: O-Sn, for water year Octoberthrough-September having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2

)

Mean annual 

precipitation 

(in.) (degrees, minutes, 

seconds)
Table 7 29

15056560 3,520 4,010 4,100 4,190 4,320 4,510 4,710 4,950 5,270 5,630 6,140

15058000 158 191 198 208 220 233 248 265 282 314 366

15059500 56.4 76.5 81.6 89.1 96.7 106 116 134 160 196 268

15060000 68.3 86.9 92.9 98.9 105 115 125 139 159 189 241

15066000 197 245 261 279 297 321 344 376 409 476 607

15067900 80.0 100 105 111 120 129 141 158 182 215 257

15068000 179 222 237 252 267 291 316 352 400 468 590

15070000R 804 954 998 1,040 1,100 1,170 1,240 1,360 1,480 1,710 2,110

15072000 717 866 910 954 1,000 1,080 1,150 1,250 1,370 1,580 1,880

15074000 409 480 497 520 546 573 607 650 700 772 895

15076000 754 864 891 918 960 1,010 1,050 1,140 1,240 1,370 1,620

15078000 728 861 901 942 987 1,050 1,110 1,190 1,290 1,460 1,730

15080000 1,010 1,210 1,270 1,340 1,420 1,510 1,620 1,770 2,000 2,320 2,860

15081497 651 901 960 1,070 1,180 1,320 1,460 1,630 1,860 2,230 3,040

15081500 608 846 915 990 1,080 1,170 1,310 1,460 1,760 2,150 2,920

15081580 49.8 60.2 62.9 66.3 70.3 74.4 80.3 86.3 96.2 109 130

15083500 74.1 100 107 114 123 133 145 161 182 215 268

15085100 71.6 92.2 99.8 107 115 127 140 157 181 218 282

15085600 165 205 216 227 244 264 284 318 354 427 537

15085700 444 556 589 627 666 719 780 855 948 1,160 1,560

15085800 244 306 322 342 366 391 428 471 533 654 822

15086600 158 193 201 211 226 241 262 287 327 396 521

15087545 40.7 54.5 58.1 61.8 67.8 74.0 82.2 91.0 104 128 165

15087570 609 859 946 1,030 1,170 1,310 1,520 1,770 2,060 2,510 3,430

15087590 24.4 34.9 37.8 41.3 45.3 49.3 54.8 63.7 74.4 89.9 123

15087690 154 196 208 220 240 260 290 332 396 515 738

15088000R 845 942 987 1,030 1,080 1,120 1,210 1,310 1,450 1,630 2,110

15090000R 537 624 654 685 715 756 803 850 932 1,040 1,240

15093400 141 177 187 198 209 222 245 272 305 359 484

15094000 236 276 287 297 312 329 347 366 388 429 510

15098000 780 893 923 952 982 1,030 1,100 1,160 1,280 1,400 1,670

15100000 498 568 588 608 629 668 714 770 836 964 1,200

15101490R 79.4 90.4 94.4 98.4 102 108 115 123 134 152 187

15101500 180 216 226 235 244 261 278 297 331 385 514

15102000 549 627 648 670 693 715 757 804 867 940 1,060

15106920 116 142 149 158 167 177 192 206 232 272 342

15106940 53.1 65.3 69.4 73.4 77.7 83.3 88.9 96.5 107 123 154

15106960 79.5 96.8 102 108 114 122 134 148 165 194 278

15106980 167 210 220 236 252 276 304 343 389 456 652

15107000 404 502 530 558 603 652 715 783 880 1,050 1,450

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

Daily mean discharge, in cubic feet per second

Station No.

O-S15 O-S10 0-S9 0-S8 0-S7 0-S6 0-S5 0-S4 0-S3 0-S2 0-S1
30 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15108000 Pavlof River near Tenakee, AK 1 57 50 30 135 02 09 24.3 100

15109000 Fish Creek near Auke Bay, AK 1 58 19 50 134 35 20 13.6 80

15120000 Aishihik River near Whitehorse, YT 5 60 51 40 137 03 40 1,660 12

15120500R Dezadeash River at Haines Junction, YT 5 60 44 54 137 30 19 3,280 10

15120600 Alsek River above Bates River near Haines Junction, YT 2 60 07 09 137 58 27 6,250 16

15129500 Situk River near Yakutat, AK 3 59 35 00 139 29 31 36.0 140

15195000 Dick Creek near Cordova, AK 3 60 20 32 144 18 10 7.95 200

15200000 Gakona River at Gakona, AK 6 62 18 06 145 18 20 620 25

15200280 Gulkana River at Sourdough, AK 6 62 31 15 145 31 51 1,770 18

152020001 Tazlina River near Glennallen, AK 6 62 03 20 145 25 34 2,670 30

15206000 Klutina River at Copper Center, AK 6 61 57 10 145 18 20 880 30

15208000 Tonsina River at Tonsina, AK 6 61 39 41 145 11 02 420 30

15208100 Squirrel Creek at Tonsina, AK 6 61 40 05 145 10 26 70.5 15

15212000 Copper River near Chitina, AK 6 61 27 56 144 27 21 20,600 25

15216000 Power Creek near Cordova, AK 3 60 35 14 145 37 05 20.5 160

15219000 West Fork Olsen Bay Creek near Cordova, AK 3 60 45 41 146 10 20 4.78 120

152259972,R Solomon Gulch at top of falls near Valdez, AK 3 61 04 45 146 18 11 – –

15237360 San Juan River near Seward, AK 3 59 49 05 147 53 00 12.4 220

15238600 Spruce Creek near Seward, AK 3 60 04 10 149 27 08 9.26 120

15238820 Barabara Creek near Seldovia, AK 3 59 28 50 151 38 42 20.7 70

15239000R Bradley River near Homer, AK 3 59 45 30 150 51 02 56.1 120

15239050 Middle Fork Bradley River tributary near Homer, AK 3 59 46 42 150 45 15 9.25 70

15239900 Anchor River near Anchor Point, AK 4 59 44 50 151 45 11 137 25

15240000 Anchor River at Anchor Point, AK 4 59 46 21 151 50 05 224 25

15241600 Ninilchik River at Ninilchik, AK 4 60 02 56 151 39 48 131 20

15242000 Kasilof River near Kasilof, AK 4 60 19 05 151 15 35 738 50

15244000 Ptarmigan Creek at Lawing, AK 4 60 24 20 149 21 45 32.6 90

15246000 Grant Creek near Moose Pass, AK 4 60 27 25 149 21 15 44.2 90

15248000 Trail River near Lawing, AK 4 60 26 01 149 22 19 181 90

15254000 Crescent Creek near Cooper Landing, AK 4 60 29 49 149 40 38 31.7 50

152580001 Kenai River at Cooper Landing, AK 4 60 29 34 149 48 28 634 70

152580001,2,R Kenai River at Cooper Landing, AK, regulated years 4 60 29 34 149 48 28 634 70

15266300 Kenai River at Soldotna, AK 4 60 28 39 151 04 46 1,950 50

15266500 Beaver Creek near Kenai, AK 4 60 33 50 151 07 03 51.0 20

15267900 Resurrection Creek near Hope, AK 4 60 53 40 149 38 13 149 30

15271000 Sixmile Creek near Hope, AK 4 60 49 15 149 25 31 234 60

15272280 Portage Creek at Portage Lake outlet near Whittier, AK 4 60 47 07 148 50 20 40.5 158

15272550 Glacier Creek at Girdwood, AK 4 60 56 29 149 09 44 58.2 70

15273900 South Fork Campbell Creek at canyon mouth near Anchorage, AK 4 61 08 52 149 43 12 25.2 25

15274000 South Fork Campbell Creek near Anchorage, AK 4 61 10 02 149 46 14 29.2 22

1Record includes glacial outbursts. Station not included in regression analysis. 2Record includes regulated years. Station not included in regression analysis. 3Drainage area is indeterminate. Station not included in regression analysis.

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: O-Sn, for water year Octoberthrough-September having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2

)

Mean annual 

precipitation 

(in.) (degrees, minutes, 

seconds)
Table 7 31

15108000 286 356 378 400 423 460 496 552 618 710 904

15109000 151 182 189 197 208 225 242 266 296 347 435

15120000 891 1,070 1,110 1,160 1,220 1,290 1,370 1,480 1,640 1,880 2,220

15120500R 2,630 3,140 3,280 3,420 3,560 3,770 4,010 4,260 4,660 5,130 6,050

15120600 19,500 22,500 23,100 23,800 24,600 25,500 26,300 27,200 28,800 30,500 34,900

15129500 481 584 606 638 673 715 762 823 902 1,040 1,250

15195000 253 331 356 383 416 461 504 545 599 703 847

15200000 2,090 2,480 2,560 2,640 2,720 2,850 3,030 3,210 3,390 3,570 4,320

15200280 2,170 2,790 2,930 3,120 3,330 3,570 3,910 4,360 4,870 5,430 6,430

15076000 10,600 12,400 12,900 13,300 13,700 14,200 14,900 15,600 16,300 17,600 20,700

15206000 4,370 4,960 5,070 5,210 5,370 5,520 5,680 5,840 6,170 6,560 7,160

15208000 2,100 2,480 2,580 2,690 2,810 2,930 3,120 3,350 3,610 3,970 4,500

15208100 42.1 65.3 69.8 75.0 81.5 90.5 102 116 143 180 233

15212000 99,000 117,000 120,000 123,000 126,000 130,000 135,000 139,000 144,000 150,000 164,000

15216000 483 561 587 617 647 684 743 807 906 1,070 1,350

15219000 61.0 74.1 77.5 82.2 87.0 91.7 100 113 129 156 208

152259972,R 32.1 127 144 160 182 207 239 280 337 420 617

15237360 366 523 575 627 689 756 834 950 1,110 1,350 1,820

15238600 172 208 221 233 246 258 276 309 343 414 562

15238820 206 252 263 274 286 297 313 332 351 389 466

15239000R 973 1,120 1,170 1,210 1,260 1,300 1,390 1,480 1,580 1,830 2,400

15239050 129 153 158 164 169 178 188 198 208 232 263

15239900 321 444 473 503 549 601 663 762 881 1,010 1,230

15240000 534 736 785 832 886 946 1,010 1,090 1,180 1,290 1,560

15241600 155 196 207 218 237 258 282 307 329 369 466

15242000 5,410 6,250 6,420 6,640 6,890 7,140 7,400 7,650 7,970 8,760 9,540

15244000 236 273 282 291 303 319 334 355 380 414 468

15246000 437 498 514 531 548 564 581 617 661 718 792

15248000 1,810 2,040 2,080 2,140 2,220 2,300 2,380 2,480 2,630 2,780 3,160

15254000 143 171 179 186 194 203 212 227 245 268 319

152580001 6,000 6,750 6,940 7,130 7,310 7,600 7,920 8,230 8,610 9,210 10,000

152580001,2,R 6,340 7,090 7,270 7,450 7,630 7,810 8,020 8,520 9,030 9,790 11,300

15266300 12,800 14,100 14,500 14,800 15,200 15,500 16,200 16,900 17,600 19,300 21,900

15266500 34.6 42.1 44.2 46.8 49.4 53.2 58.1 65.7 75.6 97.6 127

15267900 526 638 666 697 728 762 797 840 922 1,100 1,310

15271000 1,960 2,370 2,480 2,590 2,710 2,830 2,980 3,130 3,340 3,610 4,000

15272280 1,750 2,040 2,110 2,180 2,330 2,510 2,720 3,010 3,420 4,110 5,050

15272550 556 660 688 716 748 787 825 863 941 1,040 1,230

15273900 77.0 94.0 97.8 103 108 113 118 124 135 147 163

15274000 75.7 88.6 91.7 94.8 99.4 105 110 118 127 140 160

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

Daily mean discharge, in cubic feet per second

Station No.

O-S15 O-S10 0-S9 0-S8 0-S7 0-S6 0-S5 0-S4 0-S3 0-S2 0-S1
32 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15274300 North Fork Campbell Creek near Anchorage, AK 4 61 10 10 149 45 43 13.4 22

15276000R Ship Creek near Anchorage, AK 4 61 13 32 149 38 06 90.5 30

15277100 Eagle River at Eagle River, AK 4 61 18 28 149 33 32 192 40

15277410 Peters Creek near Birchwood, AK 4 61 25 08 149 29 20 87.8 35

15281000 Knik River near Palmer, AK 4 61 30 18 149 01 50 1,180 100

15282000 Caribou Creek near Sutton, AK 4 61 48 12 147 40 57 289 25

15284000 Matanuska River at Palmer, AK 4 61 36 34 149 04 16 2,070 35

15290000 Little Susitna River near Palmer, AK 4 61 42 37 149 13 47 61.9 50

15291000 Susitna River near Denali, AK 4 63 06 14 147 30 57 950 50

15291200 Maclaren River near Paxson, AK 4 63 07 10 146 31 45 280 50

15291500 Susitna River near Cantwell, AK 4 62 41 55 147 32 42 4,140 30

15292000 Susitna River at Gold Creek, AK 4 62 46 04 149 41 28 6,160 30

15292400 Chulitna River near Talkeetna, AK 4 62 33 31 150 14 02 2,570 55

15292700 Talkeetna River near Talkeetna, AK 4 62 20 49 150 01 01 2,000 35

15294005 Willow Creek near Willow, AK 4 61 46 51 149 53 04 166 30

15294300 Skwentna River near Skwentna, AK 4 61 52 23 151 22 01 2,250 45

15294350 Susitna River at Susitna Station, AK 4 61 32 41 150 30 45 19,400 35

15294450 Chuitna River near Tyonek, AK 4 61 06 31 151 15 07 131 45

15294500 Chakachatna River near Tyonek, AK 4 61 12 44 152 21 26 1,120 80

15295600R Terror River near Kodiak, AK 3 57 39 05 153 01 46 15.0 130

15296000 Uganik River near Kodiak, AK 3 57 41 06 153 25 10 123 75

15297200 Myrtle Creek near Kodiak, AK 3 57 36 12 152 24 12 4.74 130

15297900 Eskimo Creek at King Salmon, AK 4 58 41 08 156 40 08 16.1 20

15300000 Newhalen River near Iliamna, AK 4 59 51 34 154 52 24 3,480 40

15300500 Kvichak River at Igiugig, AK 4 59 19 44 155 53 57 6,500 40

15302000 Nuyakuk River near Dillingham, AK 4 59 56 08 158 11 16 1,490 60

15302500 Nushagak River at Ekwok, AK 4 59 20 57 157 28 23 9,850 30

15303000 Wood River near Aleknagik, AK 4 59 16 30 158 35 37 1,110 60

15303150 Snake River near Dillingham, AK 4 59 08 54 158 53 14 113 50

15303600 Kuskokwim River at McGrath, AK 6 62 57 10 155 35 11 11,700 23

15304000 Kuskokwim River at Crooked Creek, AK 6 61 52 16 158 06 03 31,100 22

15304520 Lubbock River near Atlin, BC 5 60 04 52 133 51 30 683 11

15304550 Pine Creek near Atlin, BC 5 59 33 40 133 39 56 269 12

15304600 Atlin River near Atlin, BC 2 59 35 57 133 48 48 2,630 12

15304650 Wann River near Atlin, BC 2 59 25 55 134 12 20 104 32

15304700 Fantail River at outlet of Fantail Lake near Atlin, BC 2 59 35 40 134 23 26 277 32

15304750 Tutshi River at outlet of Tutshi Lake near Atlin, BC 2 59 56 48 134 19 29 320 24

15304800 Lindeman River near Bennett, BC 2 59 50 12 135 00 44 92.7 52

15304850 Wheaton River near Carcross, YT 2 60 08 05 134 53 45 338 12

15304950 Maclintock River near Whitehorse, YT 5 60 36 45 134 27 27 656 12

1Record includes glacial outbursts. Station not included in regression analysis. 2Record includes regulated years. Station not included in regression analysis. 3Drainage area is indeterminate. Station not included in regression analysis.

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: O-Sn, for water year Octoberthrough-September having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2

)

Mean annual 

precipitation 

(in.) (degrees, minutes, 

seconds)
Table 7 33

15274300 33.3 39.0 40.2 41.5 43.2 45.3 47.5 49.9 52.3 55.5 60.7

15276000R 297 368 390 411 432 456 494 532 577 645 743

15277100 1,340 1,620 1,680 1,740 1,830 1,920 2,020 2,140 2,280 2,460 2,780

15277410 239 288 299 309 326 349 377 406 433 467 517

15281000 18,000 21,100 21,800 22,500 23,200 24,000 24,700 25,600 27,000 28,300 30,600

15282000 608 842 899 978 1,070 1,170 1,290 1,440 1,620 1,920 2,600

15284000 9,890 11,800 12,200 12,600 13,100 13,500 13,900 14,700 15,600 16,600 18,500

15290000 440 568 604 640 680 731 783 854 944 1,080 1,300

15291000 7,490 8,910 9,190 9,480 9,900 10,400 10,800 11,300 11,800 13,000 14,200

15291200 2,660 3,110 3,210 3,320 3,420 3,550 3,710 3,880 4,050 4,420 4,960

15291500 15,700 17,700 18,200 18,900 19,600 20,200 21,000 22,400 23,800 26,100 30,200

15292000 22,800 25,700 26,500 27,200 28,000 28,900 30,300 31,700 33,100 36,300 41,600

15292400 22,000 24,700 25,300 25,900 26,600 27,900 29,100 30,500 32,500 34,600 38,400

15292700 9,250 10,700 11,100 11,500 11,800 12,500 13,200 13,800 15,000 16,400 19,300

15294005 815 1,010 1,060 1,110 1,180 1,250 1,330 1,420 1,540 1,690 2,110

15294300 15,000 17,500 18,300 19,100 20,000 21,100 22,200 23,600 25,100 27,100 29,800

15294350 116,000 128,000 131,000 134,000 137,000 140,000 145,000 151,000 156,000 166,000 180,000

15294450 703 999 1,090 1,190 1,280 1,370 1,460 1,560 1,700 1,890 2,270

15294500 9,960 11,500 11,900 12,200 12,600 13,000 13,400 13,800 14,700 15,600 17,300

15295600R 304 372 386 403 429 455 484 521 557 638 772

15296000 1,360 1,640 1,710 1,800 1,890 1,980 2,110 2,250 2,420 2,740 3,360

15297200 83.3 107 113 120 132 144 161 180 208 246 314

15297900 20.1 24.2 25.4 26.5 27.9 29.5 31.7 34.3 38.7 45.1 58.7

15300000 19,500 21,700 22,200 22,600 23,000 23,500 24,200 24,900 25,600 26,700 28,400

15300500 25,200 27,800 28,400 29,100 29,800 30,900 32,100 33,300 35,500 37,600 40,000

15302000 11,800 14,400 15,000 15,700 16,400 17,100 17,900 18,800 19,800 21,100 23,100

15302500 41,600 47,100 48,500 49,800 51,400 52,900 54,500 57,100 59,900 65,800 73,400

15303000 8,370 9,650 9,960 10,400 10,700 11,200 11,700 12,100 13,200 14,500 16,500

15303150 936 1,110 1,160 1,210 1,270 1,340 1,410 1,490 1,590 1,730 2,030

15303600 25,300 29,200 30,100 31,000 32,100 34,500 37,100 40,100 43,800 48,800 56,600

15304000 80,300 94,100 97,000 102,000 106,000 111,000 117,000 123,000 133,000 145,000 171,000

15304520 220 253 260 267 277 288 299 318 341 388 439

15304550 366 412 422 432 448 466 486 514 545 605 733

15304600 6,420 7,130 7,300 7,480 7,660 7,910 8,170 8,450 8,790 9,160 9,710

15304650 626 719 749 779 809 848 892 937 1,010 1,090 1,250

15304700 2,060 2,390 2,460 2,530 2,600 2,700 2,830 2,960 3,090 3,330 3,660

15304750 1,210 1,460 1,510 1,550 1,630 1,710 1,810 1,930 2,070 2,220 2,600

15304800 862 1,010 1,050 1,100 1,140 1,190 1,240 1,320 1,420 1,520 1,760

15304850 540 700 745 790 847 910 984 1,090 1,250 1,440 1,700

15304950 598 745 782 824 874 932 1,010 1,110 1,240 1,460 1,750

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

Daily mean discharge, in cubic feet per second

Station No.

O-S15 O-S10 0-S9 0-S8 0-S7 0-S6 0-S5 0-S4 0-S3 0-S2 0-S1
34 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15305000 Yukon River at Whitehorse, YT 5 60 42 50 135 02 35 7,490 15

15305030 Takhini River at Kusawa Lake at Whitehorse, YT 5 60 36 46 136 07 26 1,570 16

15305050 Takhini River near Whitehorse, YT 5 60 51 08 135 44 21 2,700 14

15305100 Yukon River above Frank Creek, YT 5 61 26 04 135 11 18 11,900 14

15305150 Swift River near Swift River, BC 5 59 55 50 131 46 04 1,280 18

15305200 Gladys River at outlet of Gladys Lake near Atlin, BC 5 59 54 20 132 54 50 737 12

15305250 Teslin River near Teslin, YT 5 60 29 07 133 18 04 11,700 13

15305260 Teslin River near Whitehorse, YT 5 61 29 25 134 46 35 14,100 12

15305300 Big Salmon River near Carmack, YT 5 61 52 22 134 50 00 2,610 13

15305350 Yukon River at Carmacks, YT 5 62 05 45 136 16 18 31,600 12

15305360 Big Creek near mouth near Minto, YT 5 62 34 07 137 00 58 676 12

15305390 Ross River at Ross River, YT 5 61 59 40 132 22 40 2,800 12

15305400 Pelly River at Ross River, YT 5 61 59 12 132 26 54 7,100 12

15305406 Pelly River at Faro, YT 5 62 13 20 133 22 40 8,530 12

15305412 South MacMillan River at Canol Road near Ross River, YT 5 62 55 20 130 32 00 385 24

15305420 Pelly River at Pelly Crossing, YT 5 62 49 47 136 34 50 18,900 20

15305450 Yukon River above White River near Dawson, YT 5 63 05 02 139 29 40 57,900 10

15305500 Kluane River at outlet of Kluane Lake, YT 2 61 25 37 139 02 56 1,910 20

15305540 White River at Alaska Highway near Koidern, BC 2 61 58 41 140 33 10 2,410 22

15305582 Stewart River above Fraser Falls near Mayo, YT 5 63 29 17 135 08 06 11,810 14

15305590 Stewart River at Mayo, YT 5 63 35 26 135 53 48 12,200 15

15305620 Stewart River at Stewart Crossing, YT 5 63 22 56 136 40 59 13,500 15

15305650 Stewart River at mouth, YT 5 63 16 55 139 14 56 19,700 12

15305695 North Klondike River near mouth near Dawson, YT 5 64 01 16 138 34 58 425 16

15305698 Klondike River above Bonanza Creek near Dawson, YT 5 64 02 34 139 24 28 3,010 16

15305700 Yukon River at Dawson, YT 5 64 04 12 139 25 30 102,000 10

15356000 Yukon River at Eagle, AK 5 64 47 22 141 11 52 114,000 12

15388950 Porcupine River at Old Crow, YT 5 67 33 50 139 53 00 21,400 10

15388960 Porcupine River near International Boundary, YT 5 67 25 27 140 53 28 23,100 10

15389000 Porcupine River near Fort Yukon, AK 5 66 59 26 143 08 16 29,500 10

15389500 Chandalar River near Venetie, AK 5 67 05 49 147 11 04 9,330 10

15439800 Boulder Creek near Central, AK 6 65 34 05 144 53 13 31.3 15

15453500 Yukon River near Stevens Village, AK 6 65 52 32 149 43 04 196,000 15

15457800 Hess Creek near Livengood, AK 6 65 39 55 149 05 47 662 15

15468000 Yukon River at Rampart, AK 6 65 30 25 150 10 15 199,000 15

15470000 Chisana River at Northway Junction, AK 6 63 00 23 141 48 17 3,280 20

15476000 Tanana River near Tanacross, AK 6 63 23 18 143 44 47 8,550 18

15476300 Berry Creek near Dot Lake, AK 6 63 41 23 144 21 47 65.1 18

15478040 Phelan Creek near Paxson, AK 6 63 14 27 145 28 03 12.2 80

15484000 Salcha River near Salchaket ,AK 6 64 28 22 146 55 26 2,170 15

1Record includes glacial outbursts. Station not included in regression analysis. 2Record includes regulated years. Station not included in regression analysis. 3Drainage area is indeterminate. Station not included in regression analysis.

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: O-Sn, for water year Octoberthrough-September having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2

)

Mean annual 

precipitation 

(in.) (degrees, minutes, 

seconds)
Table 7 35

15305000 16,200 17,200 17,500 17,900 18,200 18,500 18,800 19,300 19,900 20,400 21,400

15305030 4,510 5,200 5,350 5,500 5,650 5,870 6,150 6,440 6,810 7,230 7,910

15305050 5,190 5,870 6,000 6,140 6,360 6,590 6,810 7,040 7,480 7,970 8,810

15305100 21,700 23,200 23,600 23,900 24,200 24,600 25,100 25,500 26,000 26,500 27,700

15305150 3,120 4,200 4,450 4,710 5,020 5,350 5,810 6,320 6,880 7,670 8,810

15305200 1,020 1,310 1,390 1,470 1,550 1,630 1,720 1,810 1,960 2,140 2,410

15305250 20,800 26,300 27,500 28,700 30,100 31,500 33,100 34,800 36,900 39,800 45,300

15305260 22,900 28,100 29,200 30,300 32,000 33,600 35,500 37,300 39,800 43,200 49,300

15305300 4,480 5,440 5,700 6,030 6,390 6,800 7,260 7,850 8,550 9,470 11,200

15305350 49,200 54,300 55,400 56,900 58,500 60,200 62,100 64,800 67,400 73,200 83,300

15305360 540 761 812 898 984 1,070 1,160 1,360 1,580 2,000 2,850

15305390 5,000 6,590 6,990 7,390 7,800 8,410 9,030 9,870 10,900 12,500 14,900

15305400 13,800 18,600 19,800 21,100 22,400 23,800 25,700 27,800 30,800 34,600 44,900

15305406 15,600 20,000 21,100 22,100 23,100 24,100 25,300 27,000 28,700 31,900 37,200

15305412 1,670 2,180 2,300 2,430 2,570 2,720 2,870 3,090 3,310 3,590 4,030

15305420 28,700 36,500 38,400 40,500 42,600 45,100 47,900 50,800 55,900 63,700 79,500

15305450 78,800 90,900 93,900 97,500 101,000 105,000 109,000 114,000 123,000 135,000 156,000

15305500 6,750 8,030 8,310 8,600 8,880 9,170 9,460 9,900 10,400 10,900 11,400

15305540 9,990 13,400 14,100 14,800 15,500 16,300 17,000 18,200 19,300 20,900 23,400

15305582 29,000 37,100 39,100 41,200 43,400 45,500 48,000 51,400 54,900 62,500 80,700

15305590 29,800 38,600 40,700 42,700 44,800 48,500 53,100 59,000 67,300 78,300 91,600

15305620 30,800 40,800 43,300 46,100 48,900 52,100 56,000 60,300 66,000 74,700 88,400

15305650 34,500 42,900 45,200 47,400 49,700 52,500 55,200 58,100 63,700 71,000 87,000

15305695 880 1,110 1,180 1,260 1,350 1,450 1,580 1,750 1,990 2,260 2,760

15305698 4,530 5,910 6,310 6,750 7,210 7,720 8,250 9,000 9,860 11,000 13,200

15305700 158,000 184,000 190,000 197,000 203,000 211,000 220,000 229,000 240,000 259,000 300,000

15356000 172,000 197,000 203,000 209,000 214,000 223,000 233,000 242,000 259,000 278,000 321,000

15388950 22,400 31,500 34,300 37,600 42,000 47,100 53,200 61,300 71,700 87,900 116,000

15388960 24,400 34,000 36,700 39,600 42,800 46,700 50,700 57,900 67,600 82,600 107,000

15389000 27,800 40,300 44,400 49,500 54,700 61,600 68,500 78,200 90,600 113,000 151,000

15389500 12,500 17,400 18,700 20,000 21,600 23,600 25,600 27,600 30,500 35,600 41,500

15439800 22.0 35.5 39.0 44.0 49.1 55.9 63.0 73.4 86.0 106 151

15453500 245,000 277,000 286,000 295,000 304,000 321,000 339,000 363,000 390,000 436,000 495,000

15457800 448 703 785 867 969 1,110 1,250 1,480 1,760 2,270 3,260

15468000 274,000 319,000 333,000 347,000 368,000 393,000 420,000 450,000 487,000 534,000 657,000

15470000 4,980 5,810 5,970 6,130 6,310 6,520 6,730 6,990 7,330 7,750 8,340

15476000 17,600 21,100 21,800 22,600 23,400 24,200 25,000 26,000 26,900 28,300 30,500

15476300 81.5 99.2 106 113 122 132 143 161 180 218 277

15478040 186 255 270 290 310 330 356 383 411 462 520

15484000 3,070 3,930 4,160 4,470 4,790 5,180 5,780 6,510 7,530 9,200 11,900

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

Daily mean discharge, in cubic feet per second

Station No.

O-S15 O-S10 0-S9 0-S8 0-S7 0-S6 0-S5 0-S4 0-S3 0-S2 0-S1
36 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15493000 Chena River near Two Rivers, AK 6 64 54 10 146 21 25 937 16

154937002,R Chena River below Moose Creek Dam, AK 6 64 48 03 147 13 40 – –

15511000 Little Chena River near Fairbanks, AK 6 64 53 10 147 14 50 372 15

15514000R Chena River at Fairbanks, AK 6 64 50 45 147 42 04 2,000 15

155140002,R Chena River at Fairbanks, AK, regulated years 6 64 50 45 147 42 04 2,000 15

15514500 Wood River near Fairbanks, AK 6 64 26 06 148 12 46 855 15

15515500 Tanana River at Nenana, AK 6 64 33 55 149 05 30 25,600 16

15515800 Seattle Creek near Cantwell, AK 6 63 19 32 148 14 49 36.2 20

15516000 Nenana River near Windy, AK 6 63 27 28 148 48 11 710 30

15518000 Nenana River near Healy, AK 6 63 50 43 148 56 37 1,910 25

15518080 Lignite Creek above mouth near Healy, AK 6 63 54 17 148 59 01 48.1 25

15518350 Teklanika River near Lignite, AK 6 63 55 14 149 29 51 490 25

15535000 Caribou Creek near Chatanika, AK 6 65 09 00 147 33 05 9.19 15

15564600 Melozitna River near Ruby, AK 6 64 47 34 155 33 39 2,690 15

15564800 Yukon River at Ruby, AK 6 64 44 28 155 29 22 259,000 15

15564875 Middle Fork Koyukuk River near Wiseman, AK 6 67 26 18 150 04 30 1,200 25

15564900 Koyukuk River at Hughe, AK 6 66 02 51 154 15 30 18,400 16

15565200 Yukon River near Kaltag, AK 6 64 19 40 158 43 10 296,000 15

15565447 Yukon River at Pilot Station, AK 6 61 56 04 162 52 50 321,000 16

15621000 Snake River near Nome, AK 7 64 33 51 165 30 26 85.7 30

15668200 Crater Creek near Nome, AK 7 64 55 48 164 52 12 21.9 35

15712000 Kuzitrin River near Nome, AK 7 65 13 17 164 37 15 1,720 15

15744000 Kobuk River at Ambler, AK 7 67 05 13 157 50 51 6,570 25

15744500 Kobuk River near Kiana, AK 7 66 58 25 160 07 51 9,520 25

15747000 Wulik River below Tutak Creek near Kivalina, AK 7 67 52 34 163 40 28 705 15

15798700 Nunavak Creek near Barrow, AK 7 71 15 35 156 46 57 2.79 8

15896000 Kuparuk River near Deadhorse, AK 7 70 16 54 148 57 35 3,130 9

15896700 Putuligayuk River near Deadhorse, AK 7 70 16 03 148 37 41 176 8

15904900 Atigun River tributary near Pump Station 4, AK 7 68 22 25 149 18 48 32.6 25

15906000 Sagavanirktok River tributary near Pump Station 3, AK 7 68 41 13 149 05 42 28.4 18

15908000 Sagavanirktok River near Pump Station 3, AK 7 69 00 54 148 49 02 1,860 18

1Record includes glacial outbursts. Station not included in regression analysis. 2Record includes regulated years. Station not included in regression analysis. 3Drainage area is indeterminate. Station not included in regression analysis.

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: O-Sn, for water year Octoberthrough-September having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2

)

Mean annual 

precipitation 

(in.) (degrees, minutes, 

seconds)
Table 7 37

154855003 44,100 50,400 51,900 53,300 54,800 56,500 58,300 60,000 62,400 65,300 69,500

15493000 1,260 1,610 1,690 1,830 1,970 2,140 2,360 2,610 2,980 3,610 5,050

154937002,R 1,880 2,450 2,580 2,760 2,970 3,190 3,410 3,740 4,170 4,950 6,680

15511000 376 474 502 530 574 624 673 756 838 1,000 1,310

15514000R 2,550 3,260 3,450 3,720 4,020 4,370 4,820 5,400 6,100 7,480 9,770

155140002,R 2,230 2,780 2,930 3,100 3,360 3,640 3,940 4,350 4,880 5,710 7,330

15514500 1,010 1,240 1,280 1,330 1,390 1,460 1,540 1,660 1,800 2,010 2,480

15515500 52,400 58,600 59,900 61,200 62,700 64,500 66,400 68,200 70,700 74,600 79,800

15515800 60.9 85.8 94.0 105 120 136 157 182 210 252 420

15516000 2,700 3,220 3,340 3,510 3,680 3,850 4,080 4,320 4,640 5,100 6,040

15518000 8,150 9,550 9,860 10,200 10,700 11,100 11,600 12,300 13,300 14,700 17,000

15518080 50.7 65.0 69.1 74.7 80.6 86.6 96.4 107 123 143 199

15518350 1,370 1,700 1,780 1,860 1,960 2,090 2,220 2,480 2,800 3,250 4,050

15535000 8.70 11.7 12.5 13.6 14.8 16.0 18.3 20.7 23.7 30.1 41.0

15564600 4,020 5,980 6,770 7,760 8,780 9,830 10,900 12,500 14,200 16,700 19,400

15564800 343,000 397,000 410,000 429,000 448,000 467,000 493,000 520,000 566,000 626,000 709,000

15564875 1,790 2,610 2,840 3,090 3,340 3,590 4,020 4,490 4,970 5,970 7,380

15564900 31,700 44,500 48,000 51,500 56,800 62,100 67,700 73,400 79,300 93,000 112,000

15565200 478,000 554,000 569,000 584,000 599,000 615,000 632,000 678,000 736,000 817,000 893,000

15565447 456,000 510,000 523,000 538,000 552,000 567,000 588,000 616,000 646,000 681,000 736,000

15621000 327 468 505 560 614 695 792 918 1,060 1,320 1,790

15668200 115 161 174 187 206 226 251 282 320 363 459

15712000 1,780 3,060 3,510 3,990 4,510 5,040 6,020 7,290 9,360 12,500 18,100

15744000 16,900 22,200 23,600 25,100 26,900 28,700 32,000 37,900 46,300 58,800 73,400

15744500 32,100 42,000 44,300 47,900 51,800 56,000 60,200 66,200 73,000 81,400 103,000

15747000 1,950 2,910 3,180 3,560 3,970 4,480 5,010 5,910 7,110 8,790 11,300

15798700 0.70 2.10 2.50 3.00 3.60 4.40 5.50 7.20 9.70 13.4 20.3

15896000 1,640 2,830 3,150 3,630 4,330 5,020 6,340 7,720 10,900 15,700 26,400

15896700 15.3 32.6 41.6 53.0 69.0 89.5 122 189 310 542 1,250

15904900 78.7 111 120 130 139 150 165 181 197 230 274

15906000 34.7 50.7 55.0 59.9 64.9 70.0 81.5 96.0 114 153 220

15908000 4,030 5,130 5,430 5,730 6,030 6,510 7,060 7,600 8,140 9,330 10,900

Table 7. Annual high-duration flow statistics for streamflow-gaging stations in Regions 1–7, Alaska and conterminous basins in Canada—Continued

Daily mean discharge, in cubic feet per second

Station No.

O-S15 O-S10 0-S9 0-S8 0-S7 0-S6 0-S5 0-S4 0-S3 0-S2 0-S1
38 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: MONTHn, for the indicated 

month having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2)

Mean annual 

precipitation 

(in.)

(degrees, minutes, 

seconds)

15008000 Salmon River near Hyder, AK 1 56 01 34 130 03 55 94.1 110

15010000 Davis River near Hyder, AK 1 55 45 00 130 12 00 80.0 175

15011500 Red River near Metlakatla, AK 1 55 08 29 130 31 50 45.3 200

15012000 Winstanley Creek near Ketchikan, AK 1 55 24 59 130 52 03 15.5 160

15015590 Unuk River near Stewart, BC 1 56 21 05 130 41 30 571 100

15018000 Shelokum Lake outlet near Bell Island, AK 1 55 59 00 131 39 00 15.6 165

15022000 Harding River near Wrangell, AK 1 56 12 48 131 38 12 67.4 175

15024200 Klappan River near Telegraph Creek, BC 2 57 54 00 129 42 14 1,370 25

15024300 Stikine River above Grand Canyon near Telegraph Creek, BC 2 58 02 38 129 56 45 7,260 20

15024500 Tuya River near Telegraph Creek, BC 2 58 04 20 130 49 27 1,390 15

15024600 Stikine River at Telegraph Creek, BC 2 57 54 03 131 09 16 11,300 15

15024640 Stikine River above Butterfly Creek, BC 2 57 29 10 131 45 00 13,900 22

15024670 Iskut River at outlet of Kinaskan Lake, BC 2 57 32 00 130 12 28 483 20

15024684 More Creek near mouth, BC 2 57 02 27 130 24 05 326 70

15024690 Forrest Kerr Creek near Wrangell, BC 2 56 54 56 130 43 15 120 100

15024695 Iskut River above Snippaker Creek, BC 2 56 41 55 130 52 23 2,790 60

15024700 Iskut River below Johnson River, BC 2 56 44 20 131 40 25 3,610 60

15024750 Goat Creek near Wrangell, AK 1 56 39 40 131 58 14 17.3 175

15024800 Stikine River near Wrangell, AK 2 56 42 29 132 07 49 19,900 40

15026000 Cascade Creek near Petersburg, AK 1 57 00 21 132 46 45 23.0 175

15028300 Farragut River near Petersburg, AK 1 57 10 24 133 06 36 151 175

15030000 Sweetheart Falls Creek near Juneau, AK 1 57 56 35 133 40 55 36.3 150

15031000 Long River above Long Lake near Juneau, AK 1 58 10 56 133 53 06 8.29 175

15034000R Long River near Juneau, AK 1 58 10 00 133 41 50 32.5 180

15036000 Speel River near Juneau, AK 1 58 12 10 133 36 40 226 175

15038000R Crater Creek near Juneau, AK 1 58 08 15 133 46 15 11.4 175

15039900 Dorothy Lake outlet near Juneau, AK 1 58 14 56 133 58 54 11.0 160

15040000 Dorothy Creek near Juneau, AK 1 58 13 40 134 02 25 15.2 150

15041000 Sloko River near Atlin, BC 2 59 06 20 133 39 40 165 28

15041100 Taku River near Tulsequah, BC 2 58 38 20 133 32 25 6,000 24

15041200 Taku River near Juneau, AK 1 58 32 19 133 42 00 6,600 35

15044000 Carlson Creek near Juneau, AK 1 58 19 00 134 10 15 24.3 200

15048000 Sheep Creek near Juneau, AK 1 58 16 30 134 18 50 4.57 150

15052000 Lemon Creek near Juneau, AK 1 58 23 30 134 25 15 12.1 180

15052500 Mendenhall River near Auke Bay, AK 1 58 25 47 134 34 22 85.1 180

15052800 Montana Creek near Auke Bay, AK 1 58 23 53 134 36 34 14.1 100

15053800 Lake Creek at Auke Bay, AK 1 58 23 40 134 37 50 2.50 80

15056100 Skagway River at Skagway, AK 1 59 28 02 135 17 00 145 100

15056200 West Creek near Skagway, AK 1 59 31 35 135 21 10 43.2 100

15056560 Klehini River near Klukwan, AK 1 59 24 47 135 59 49 284 80

15058000 Purple Lake outlet near Metlakatla, AK 1 55 06 00 131 26 00 6.67 150

15059500 Whipple Creek near Ward Cove, AK 1 55 26 30 131 47 38 5.29 125

15060000 Perseverance Creek near Wacker, AK 1 55 24 40 131 40 05 2.81 190

15066000 Beaver Falls Creek near Ketchikan, AK 1 55 22 55 131 28 25 5.80 190

15067900 Upper Mahoney Lake outlet near Ketchikan, AK 1 55 24 50 131 33 16 2.03 200

15068000 Mahoney Creek near Ketchikan, AK 1 55 25 34 131 30 40 5.70 200

15070000R Swan Lake near Ketchikan, AK 1 55 36 54 131 20 14 36.5 200

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.
Table 8 39

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No.

Mean 

basin 

elevation 

(feet)

Area of 

glaciers 

(percent)

Daily mean discharge, in cubic feet per second

JULY98 JULY95 JULY90 JULY85 JULY80 JULY70 JULY60 JULY50

15008000 3,840 35 1,130 1,230 1,450 1,560 1,650 1,800 1,990 2,150

15010000 3,400 11 1,150 1,270 1,360 1,440 1,510 1,610 1,690 1,800

15011500 1,700 0 152 187 216 250 299 385 461 530

15012000 1,730 0 32.0 51.7 69.8 82.6 91.0 109 124 142

15015590 3,880 40 5,260 5,700 6,280 6,590 6,900 7,450 8,040 8,510

15018000 1,700 0 38.4 54.7 83.0 99.2 114 151 186 217

15022000 2,400 9 639 718 799 864 929 1,050 1,160 1,260

15024200 4,800 2 3,850 4,350 4,850 5,200 5,460 5,940 6,480 6,950

15024300 4,300 0 11,200 13,800 15,600 17,000 18,300 20,800 23,300 25,500

15024500 3,800 0 448 559 660 733 804 933 1,100 1,300

15024600 4,200 0 13,200 16,700 19,300 21,600 23,200 26,300 29,300 32,100

15024640 4,250 5 31,900 36,500 40,100 42,700 44,500 47,900 51,300 54,800

15024670 4,000 0 837 940 1,120 1,220 1,290 1,410 1,520 1,630

15024684 4,270 40 2,620 3,030 3,440 3,700 3,920 4,310 4,660 4,930

15024690 3,540 64 1,290 1,690 2,000 2,220 2,410 2,750 2,960 3,150

15024695 3,500 6 16,400 17,800 19,200 20,200 21,200 22,900 24,600 26,500

15024700 3,500 6 25,400 27,500 29,500 31,100 32,300 35,000 37,700 39,900

15024750 2,560 5 158 179 198 210 223 246 267 289

15024800 4,310 10 91,500 96,200 104,000 108,000 112,000 118,000 124,000 131,000

15026000 3,160 13 278 302 325 346 365 401 438 474

15028300 2,540 26 1,650 1,860 1,990 2,080 2,160 2,310 2,460 2,620

15030000 2,110 9 302 327 360 384 414 453 470 516

15031000 3,020 39 96.1 112 138 160 172 196 221 239

15034000R 2,400 22 600 635 683 715 737 787 836 886

15028300 3,100 25 3,490 3,820 4,160 4,420 4,660 5,060 5,390 5,870

15038000R 2,590 28 246 264 289 306 324 351 381 423

15039900 3,450 35 164 181 190 197 207 222 235 247

15040000 3,100 16 198 211 222 231 239 254 266 284

15041000 4,800 44 454 534 608 652 698 789 908 1,080

15041100 3,800 4 13,400 14,400 15,800 16,900 17,900 19,400 20,800 22,300

15041200 3,790 8 20,700 21,900 23,700 24,700 25,400 27,000 28,200 29,500

15044000 2,200 10 285 331 401 426 451 505 564 599

15048000 1,900 2 34.5 39.2 44.8 50.5 54 60.3 66.5 73.4

15052000 3,430 67 229 253 274 292 309 338 363 385

15052500 3,260 66 1,710 1,840 2,010 2,150 2,270 2,490 2,670 2,870

15052800 1,500 3 23.0 60.7 74.7 83.8 90.5 102 115 126

15053800 1,170 0 0.2 0.3 0.6 0.8 1.1 1.8 2.8 4.4

15056100 3,900 17 716 823 915 1,020 1,120 1,300 1,470 1,630

15056200 3,400 26 524 562 646 701 738 815 884 972

15056560 3,480 15 2,300 2,560 2,870 3,090 3,240 3,540 3,790 3,970

15058000 860 0 7.8 9.3 12.7 15.3 17.8 23.1 28.1 34.9

15059500 880 0 3.2 4.2 4.8 5.2 5.8 7.1 8.4 10.9

15060000 1,340 0 0.7 2.2 3.2 4.4 5.3 7.2 9.5 13

15066000 1,630 0 28.2 36.0 41.5 46.8 52.9 61.0 69.0 77.0

15067900 2,500 0 16.8 19.1 22.4 25.3 28.1 37.6 44.0 50.0

15068000 1,680 0 31.6 38.0 49.2 61.9 69.2 79.5 92.1 104

15070000R 1,800 0 128 157 209 235 269 327 376 421
40 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated; Station name: AK, Alaska; BC, British Columbia; YT, Yukon; Daily mean discharge: MONTHn, for the indicated month 

having an n-percent exceedance probability; mi2, square mile; in., inch; –, no data available]

Station No. Station Name Daily mean discharge, in cubic feet per second

AUG98 AUG95 AUG90 AUG85 AUG80 AUG70

15008000 Salmon River near Hyder, AK 1,110 1,200 1,440 1,610 1,780 1,980

15010000 Davis River near Hyder, AK 814 921 1,080 1,160 1,220 1,360

15011500 Red River near Metlakatla, AK 72.3 87.9 112 134 148 184

15012000 Winstanley Creek near Ketchikan, AK 20.1 26.1 33.9 40.8 48.1 59.9

15015590 Unuk River near Stewart, BC 3,840 4,340 4,730 5,150 5,590 6,260

15018000 Shelokum Lake outlet near Bell Island, AK 26.5 35.2 53.4 68.2 74.7 94.1

15022000 Harding River near Wrangell, AK 431 507 561 608 650 728

15024200 Klappan River near Telegraph Creek, BC 2,230 2,550 2,850 3,030 3,190 3,540

15024300 Stikine River above Grand Canyon near Telegraph Creek, BC 7,450 8,170 8,950 9,640 10,300 11,400

15024500 Tuya River near Telegraph Creek, BC 321 380 432 481 521 566

15024600 Stikine River at Telegraph Creek, BC 9,250 10,300 11,400 12,100 12,800 14,400

15024640 Stikine River above Butterfly Creek, BC 20,400 22,700 25,700 27,100 28,200 30,900

15024670 Iskut River at outlet of Kinaskan Lake, BC 654 697 739 784 834 903

15024684 More Creek near mouth, BC 1,970 2,270 2,570 2,790 2,960 3,280

15024690 Forrest Kerr Creek near Wrangell, BC 800 1,720 2,060 2,280 2,450 2,680

15024695 Iskut River above Snippaker Creek, BC 10,800 11,800 13,000 14,200 15,000 16,600

15024700 Iskut River below Johnson River, BC 18,100 19,800 22,100 23,900 25,100 27,500

15024750 Goat Creek near Wrangell, AK 99.6 114 125 136 147 162

15024800 Stikine River near Wrangell, AK 61,700 67,100 74,700 79,500 83,300 89,400

15026000 Cascade Creek near Petersburg, AK 185 212 236 260 282 318

15028300 Farragut River near Petersburg, AK 1,430 1,570 1,730 1,840 1,970 2,160

15030000 Sweetheart Falls Creek near Juneau, AK 236 258 282 299 313 340

15031000 Long River above Long Lake near Juneau, AK 87.2 119 150 166 184 207

15034000R Long River near Juneau, AK 500 554 604 644 690 760

15036000 Speel River near Juneau, AK 3,060 3,490 3,820 4,100 4,420 4,850

15038000R Crater Creek near Juneau, AK 216 232 267 283 300 339

15039900 Dorothy Lake outlet near Juneau, AK 122 142 166 182 193 204

15040000 Dorothy Creek near Juneau, AK 172 186 206 217 224 239

15041000 Sloko River near Atlin, BC 498 584 703 774 831 964

15041100 Taku River near Tulsequah, BC 8,350 9,590 10,900 12,100 12,900 14,200

15041200 Taku River near Juneau, AK 14,600 15,600 17,200 18,100 18,700 20,700

15044000 Carlson Creek near Juneau, AK 191 203 228 253 281 338

15048000 Sheep Creek near Juneau, AK 20.4 24.8 29.6 33.8 38.0 45.6

15052000 Lemon Creek near Juneau, AK 202 241 275 297 310 338

15052500 Mendenhall River near Auke Bay, AK 1,640 1,840 2,100 2,300 2,440 2,650

15052800 Montana Creek near Auke Bay, AK 41.3 49.4 60.0 69.1 76.9 90.5

15053800 Lake Creek at Auke Bay, AK 0.1 0.3 0.7 2.0 2.9 4.6

15056100 Skagway River at Skagway, AK 454 551 675 752 819 952

15056200 West Creek near Skagway, AK 430 496 559 617 670 748

15056560 Klehini River near Klukwan, AK 1,210 1,600 1,950 2,140 2,280 2,670

15058000 Purple Lake outlet near Metlakatla, AK 3.4 4.9 7.2 9.5 12.1 15.9

15059500 Whipple Creek near Ward Cove, AK 1.8 2.3 3.0 4.3 5.1 6.7

15060000 Perseverance Creek near Wacker, AK 0.6 1.0 1.4 1.9 2.8 4.0

15066000 Beaver Falls Creek near Ketchikan, AK 14.4 15.9 19.8 23.3 25.7 30.2

15067900 Upper Mahoney Lake outlet near Ketchikan, AK 6.4 7.4 9.9 12.2 14.5 18.3

15068000 Mahoney Creek near Ketchikan, AK 17.4 21.2 29.9 35.7 41.0 48.4

15070000R Swan Lake near Ketchikan, AK 91.4 106 126 141 155 180

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.
Table 8 41

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No. Daily mean discharge, in cubic feet per second

AUG60 AUG50 SEPT98 SEPT95 SEPT90 SEPT85 SEPT80 SEPT70 SEPT60 SEPT50

15008000 2,160 2,320 556 636 801 917 1,010 1,170 1,350 1,550

15010000 1,460 1,610 370 469 605 690 745 854 1,010 1,150

15011500 238 306 57.0 82.5 116 145 166 249 319 404

15012000 74.4 98.6 23.1 31.8 42.3 54.1 64.6 89.9 116 139

15015590 6,940 7,510 1,990 2,390 2,740 3,120 3,380 3,790 4,220 4,720

15018000 117 145 31.0 40.0 47.0 52.6 66.4 91.3 114 162

15022000 823 910 279 329 389 433 477 576 679 835

15024200 3,860 4,250 1,360 1,470 1,650 1,860 2,020 2,280 2,480 2,680

15024300 12,700 13,900 5,180 5,610 6,440 7,180 7,680 8,580 9,460 10,200

15024500 626 699 377 429 464 504 568 681 753 856

15024600 16,100 17,900 7,150 7,860 8,820 9,420 9,970 10,900 12,000 13,100

15024640 33,200 36,300 12,100 13,700 16,200 17,500 18,800 20,800 22,600 24,300

15024670 980 1,060 419 467 524 562 594 648 697 753

15024684 3,550 3,880 732 833 1,050 1,200 1,370 1,620 1,840 2,060

15024690 2,860 3,080 457 548 690 834 996 1,220 1,420 1,720

15024695 18,300 20,400 4,860 5,720 7,050 7,920 8,570 9,590 10,600 11,500

15024700 29,900 32,200 8,650 10,400 12,300 13,500 14,300 16,300 18,100 19,900

15024750 180 199 58.5 67.5 79.2 86.1 93.2 110 138 172

15024800 96,500 104,000 32,100 38,200 44,000 49,300 53,200 58,500 64,300 70,600

15026000 354 388 115 137 162 182 200 245 298 352

15028300 2,320 2,510 773 943 1,140 1,270 1,390 1,630 1,860 2,230

15030000 373 415 88.9 136 197 226 259 317 364 453

15031000 225 243 54.9 62.9 77.7 93.9 107 143 174 203

15034000R 818 880 280 312 364 430 479 558 657 756

15036000 5,320 5,810 1,510 1,870 2,270 2,670 2,960 3,560 4,160 4,830

15038000R 366 406 83.8 96.5 136 175 199 242 288 339

15039900 222 238 91.6 111 129 140 151 169 194 223

15040000 258 277 119 130 145 158 173 198 218 243

15041000 1,090 1,220 218 261 326 368 407 468 533 601

15041100 15,600 16,800 4,010 5,000 5,820 6,420 6,950 7,840 8,710 9,770

15041200 22,200 23,900 7,750 8,550 9,440 10,300 11,500 13,500 15,500 17,300

15044000 387 461 112 126 148 169 191 240 292 371

15048000 54.5 63.0 18.3 24.0 29.5 33.2 37.2 44.0 50.9 59.8

15052000 373 405 74.2 108 139 161 174 216 255 304

15052500 2,870 3,100 671 896 1,100 1,250 1,390 1,670 1,980 2,250

15052800 108 125 37.7 41.5 50.7 60.1 67.3 82.2 97.9 120

15053800 6.4 9.6 0.1 0.7 1.3 2.0 2.5 4.0 6.6 9.4

15056100 1,090 1,200 180 216 271 319 360 426 514 620

15056200 822 909 151 213 251 274 298 369 448 533

15056560 3,010 3,220 596 730 829 909 983 1,170 1,340 1,530

15058000 20.1 27.7 6.4 15.0 23.3 29.3 34.2 45.0 56.2 69.7

15059500 8.5 10.4 5.3 5.8 7.0 8.2 9.7 13.9 17.3 21.1

15060000 5.9 9.0 1.5 2.3 3.9 5.4 7.2 11.4 16.8 22.0

15066000 35.3 45.8 5.8 6.8 12.0 15.7 19.4 28.6 49.7 77.9

15067900 23.0 28.1 4.6 5.6 7.2 9.0 10.6 14.7 19.9 28.0

15068000 56.9 66.8 8.0 14.0 19.8 25.0 29.7 39.4 51.3 65.0

15070000R 209 250 62.6 91.0 120 142 167 215 286 366
42 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15072000 Fish Creek near Ketchikan, AK 1 55 23 31 131 11 38 32.1 180

15074000 Ella Creek near Ketchikan, AK 1 55 30 20 131 01 25 19.7 175

15076000 Manzanita Creek near Ketchikan, AK 1 55 36 00 130 59 00 33.9 200

15078000 Grace Creek near Ketchikan, AK 1 55 39 28 130 58 14 30.2 200

15080000 Orchard Creek near Bell Island, AK 1 55 50 00 131 27 00 59.0 150

15081497 Staney Creek near Klawock, AK 1 55 48 05 133 06 31 50.6 100

15081500 Staney Creek near Craig, AK 1 55 48 57 133 07 58 51.6 100

15081580 Black Bear Lake outlet near Klawock, AK 1 55 33 25 132 52 33 1.82 100

15083500 Perkins Creek near Metlakatla, AK 1 54 56 48 132 10 15 3.38 150

15085100 Old Tom Creek near Kasaan, AK 1 55 23 44 132 24 25 5.90 100

15085600 Indian Creek near Hollis, AK 1 55 26 58 132 41 41 8.82 100

15085700 Harris River near Hollis, AK 1 55 27 47 132 42 11 28.7 120

15085800 Maybeso Creek at Hollis, AK 1 55 29 26 132 40 31 15.1 120

15086600 Big Creek near Point Baker, AK 1 56 07 54 133 08 56 11.2 110

15087545 Municipal Watershed Creek near Petersburg, AK 1 56 46 40 132 55 07 2.20 100

15087570 Hamilton Creek near Kake, AK 1 56 52 21 133 40 30 65.0 70

15087590 Rocky Pass Creek near Point Baker, AK 1 56 37 10 133 44 10 2.72 100

15087690 Indian River near Sitka, AK 1 57 04 01 135 17 42 10.1 140

15090000R Green Lake near Sitka, AK 1 56 59 14 135 06 37 28.8 160

15093400 Sashin Creek near Big Port Walter, AK 1 56 22 32 134 39 40 3.72 300

15094000 Deer Lake outlet near Port Alexander, AK 1 56 31 10 134 40 10 7.41 300

15098000 Baranof River at Baranof, AK 1 57 05 15 134 50 30 32.0 180

15100000 Takatz Creek near Baranof, AK 1 57 08 35 134 51 50 17.5 180

151014901,R Greens Creek at Greens Creek Mine near Juneau, AK 1 58 05 00 134 37 54 8.62 98

15101500 Greens Creek near Juneau, AK 1 58 05 18 134 44 49 22.8 80

15102000 Hasselborg Creek near Angoon, AK 1 57 39 40 134 14 55 56.2 100

15106920 Kadashan River above Hook Creek near Tenakee, AK 1 57 39 46 135 11 06 10.2 100

15106940 Hook Creek above tributary near Tenakee, AK 1 57 40 39 135 07 42 4.48 100

15106960 Hook Creek near Tenakee, AK 1 57 40 22 135 10 40 8.00 100

15106980 Tonalite Creek near Tenakee, AK 1 57 40 42 135 13 17 14.5 100

15107000 Kadashan River near Tenakee, AK 1 57 41 43 135 12 59 37.7 100

15108000 Pavlof River near Tenakee, AK 1 57 50 30 135 02 09 24.3 100

15109000 Fish Creek near Auke Bay, AK 1 58 19 50 134 35 20 13.6 80

15120000 Aishihik River near Whitehorse, YT 5 60 51 40 137 03 40 1,660 12

15120500R Dezadeash River at Haines Junction,YT 5 60 44 54 137 30 19 3,280 10

15120600 Alsek River above Bates River near Haines Junction, YT 2 60 07 09 137 58 27 6,250 16

15129500 Situk River near Yakutat, AK 3 59 35 00 139 29 31 36.0 140

15195000 Dick Creek near Cordova, AK 3 60 20 32 144 18 10 7.95 200

15200000 Gakona River at Gakona, AK 6 62 18 06 145 18 20 620 25

15200280 Gulkana River at Sourdough, AK 6 62 31 15 145 31 51 1,770 18

15202000 Tazlina River near Glennallen, AK 6 62 03 20 145 25 34 2,670 30

15206000 Klutina River at Copper Center, AK 6 61 57 10 145 18 20 880 30

15208000 Tonsina River at Tonsina, AK 6 61 39 41 145 11 02 420 30

15208100 Squirrel Creek at Tonsina, AK 6 61 40 05 145 10 26 70.5 15

15212000 Copper River near Chitina, AK 6 61 27 56 144 27 21 20,600 25

15216000 Power Creek near Cordova, AK 3 60 35 14 145 37 05 20.5 160

15219000 West Fork Olsen Bay Creek near Cordova, AK 3 60 45 41 146 10 20 4.78 120

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: MONTHn, for the indicated 

month having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2)

Mean annual 

precipitation 

(in.)

(degrees, minutes, 

seconds)
Table 8 43

15072000 1,300 0 72.1 93.9 118 141 161 200 242 278

15074000 900 0 29.2 44.9 62.1 80.2 89.8 105 118 136

15076000 1,300 0 129 200 240 259 275 312 349 387

15078000 1,500 0 132 149 168 188 205 237 278 314

15080000 1,600 0 171 185 208 238 259 322 394 452

15081497 882 0 8.6 13.4 17.1 20.2 23.4 31.1 38.6 51.7

15081500 850 0 24.8 28.6 32.7 37.3 42.0 56.6 67.9 77.6

15081580 2,300 0 7.1 8.3 11.0 13.5 15.2 17.3 19.9 23.4

15083500 730 0 1.3 1.7 2.0 2.2 2.4 2.9 3.6 4.5

15085100 1,000 0 2.4 3.1 4.1 5.2 6.1 7.4 8.6 10.6

15085600 1,000 0 2.5 2.8 4.2 5.0 5.9 7.7 11.1 16.0

15085700 1,400 0 18.6 35.7 50.4 56.3 61.6 71.8 82.7 100

15085800 1,120 0 9.9 13.4 25.3 29.5 33.6 41.7 49.6 58.2

15086600 680 0 6.3 7.5 9.0 10.9 12.6 16.1 19.5 23.8

15087545 1,400 0 1.7 2.0 2.4 3.0 3.7 4.7 6.0 7.4

15087570 493 0 7.5 10.2 13.3 18.9 24.9 36.0 46.7 62.0

15087590 358 0 0.1 0.3 0.4 0.5 0.7 0.8 1.2 1.6

15087690 1,340 0 16.0 18.3 23.1 29.3 34.7 39.6 44.2 50.7

15090000R 2,100 7 310 346 369 384 392 416 434 450

15093400 1,130 0 10.8 14.7 20.6 24.2 28.3 34.4 42.1 50.6

15094000 1,300 1 53.2 61.2 77.9 107 119 133 148 159

15098000 2,000 14 393 431 464 502 528 584 633 676

15100000 2,300 13 280 308 333 351 366 396 434 465

151014901,R 2,452 0 23.1 28.1 30.4 32.2 34.1 37 41.2 46.8

15101500 1,880 0 39.7 44.4 51.3 58.5 69.4 84.8 97.2 107

15102000 1,200 1 95.4 140 158 183 200 225 254 282

15106920 1,020 0 6.3 7.9 9.8 12.1 13.5 16.6 20.0 23.9

15106940 1,260 0 3.7 4.7 5.6 6.6 7.5 10.0 13.0 16.4

15106960 1,160 0 5.7 7.1 9.9 11.4 12.7 15.6 19.0 22.3

15106980 950 0 12.3 15.6 19.3 22.1 25.0 29.1 33.2 38.4

15107000 970 0 35.3 42.4 49.3 53.6 57.9 71.0 88.7 110

15108000 920 0 34.7 42.1 49.6 56.1 61.3 70.8 80.9 94.1

15109000 1,600 0 24.2 29.9 35.7 39.7 43.7 53.2 61.1 73.1

15120000 4,190 0 237 379 423 466 504 575 673 795

15120500R 3,870 0 1,420 1,610 1,790 1,910 2,030 2,320 2,600 2,910

15120600 4,630 13 15,400 17,500 18,700 19,500 20,200 21,800 23,100 24,400

15129500 370 1 71.5 80.6 92.1 110 122 141 157 174

15195000 890 0 63.4 74.0 83.6 92.0 98.1 112 134 146

15200000 3,030 8 1,160 1,490 1,610 1,710 1,820 1,970 2,160 2,320

15200280 2,780 0 562 614 677 735 810 1,000 1,160 1,320

15202000 3,450 11 6,680 8,090 9,260 9,600 9,900 10,700 11,500 12,400

15206000 3,500 11 3,310 3,760 4,010 4,160 4,290 4,500 4,760 4,980

15208000 3,600 11 1,420 1,610 1,810 1,930 2,020 2,210 2,330 2,480

15208100 3,100 0 16.8 17.9 18.6 19.4 20.9 24.1 26.7 29.4

15212000 3,620 17 72,800 82,900 92,500 96,800 103,000 110,000 118,000 122,000

15216000 2,000 27 321 345 369 388 403 428 450 475

15219000 1,400 0 16.4 18.7 21.5 23.9 25.9 30.8 35.9 40.9

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No.

Mean 

basin 

elevation 

(feet)

Area of 

glaciers 

(percent)

Daily mean discharge, in cubic feet per second

JULY98 JULY95 JULY90 JULY85 JULY80 JULY70 JULY60 JULY50
44 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15072000 Fish Creek near Ketchikan, AK 45.2 57.3 73.9 89.2 104 130

15074000 Ella Creek near Ketchikan, AK 23.6 30.4 41.0 48.1 54.1 67.8

15076000 Manzanita Creek near Ketchikan, AK 105 138 160 178 191 219

15078000 Grace Creek near Ketchikan, AK 41.6 50.7 74.4 92.2 105 134

15080000 Orchard Creek near Bell Island, AK 72.1 93.1 109 128 145 178

15081497 Staney Creek near Klawock, AK 14.1 17.2 24.5 28.7 34.9 42.9

15081500 Staney Creek near Craig, AK 12.2 16.2 25.0 32.3 38.9 49.3

15081580 Black Bear Lake outlet near Klawock, AK 5.4 6.2 7.4 8.4 9.7 11.8

15083500 Perkins Creek near Metlakatla, AK 1.2 1.4 1.7 2.0 2.2 2.8

15085100 Old Tom Creek near Kasaan, AK 1.8 2.3 3.1 3.8 4.3 5.2

15085600 Indian Creek near Hollis, AK 1.9 3.0 3.9 4.9 5.5 7.5

15085700 Harris River near Hollis, AK 21.7 26.2 31.3 36.7 42.4 51.3

15085800 Maybeso Creek at Hollis, AK 13.8 15.6 17.6 20.2 21.7 25.8

15086600 Big Creek near Point Baker, AK 2.9 5.8 10.1 12.5 14.2 19.1

15087545 Municipal Watershed Creek near Petersburg, AK 0.7 0.8 1.0 1.5 2.1 3.2

15087570 Hamilton Creek near Kake, AK 13.1 16.3 22.1 26.6 30.9 40.5

15087590 Rocky Pass Creek near Point Baker, AK 0.1 0.2 0.2 0.5 0.7 1.0

15087690 Indian River near Sitka, AK 17.7 23 29.4 32.2 34.7 42.5

15090000R Green Lake near Sitka, AK 172 202 245 269 313 330

15093400 Sashin Creek near Big Port Walter, AK 5.4 6.7 10.2 14.3 16.1 21.4

15094000 Deer Lake outlet near Port Alexander, AK 28.4 38.9 65.8 78.5 88.7 108

15098000 Baranof River at Baranof, AK 270 311 354 385 414 462

15100000 Takatz Creek near Baranof, AK 197 242 256 266 276 300

151014901,R Greens Creek at Greens Creek Mine near Juneau, AK 13.8 15.5 17.7 20.2 22.4 25.6

15101500 Greens Creek near Juneau, AK 18.0 26.2 34.8 40.3 46.3 60.1

15102000 Hasselborg Creek near Angoon, AK 72.6 80.0 92.7 108 124 156

15106920 Kadashan River above Hook Creek near Tenakee, AK 5.5 6.6 7.9 9.0 10.8 13.8

15106940 Hook Creek above tributary near Tenakee, AK 2.4 2.8 3.1 3.5 4.1 5.8

15106960 Hook Creek near Tenakee, AK 4.8 5.3 6.1 6.8 7.5 9.0

15106980 Tonalite Creek near Tenakee, AK 8.1 10.6 14.7 16.9 18.7 23.2

15107000 Kadashan River near Tenakee, AK 26.4 28.9 31.6 35.1 38.6 49.6

15108000 Pavlof River near Tenakee, AK 18.8 25.5 31.4 36.0 39.8 48.2

15109000 Fish Creek near Auke Bay, AK 9.5 14.6 18.7 22.4 26.3 31.7

15120000 Aishihik River near Whitehorse, YT 252 334 377 405 430 473

15120500R Dezadeash River at Haines Junction,YT 972 1,210 1,410 1,530 1,620 1,780

15120600 Alsek River above Bates River near Haines Junction, YT 11,700 13,300 14,500 15,800 16,500 18,200

15129500 Situk River near Yakutat, AK 57.7 78.2 97.7 111 120 140

15195000 Dick Creek near Cordova, AK 22.4 28.4 37.5 45.8 53.8 66.2

15200000 Gakona River at Gakona, AK 517 827 1,070 1,240 1,390 1,640

15200280 Gulkana River at Sourdough, AK 460 513 622 662 705 824

15202000 Tazlina River near Glennallen, AK 6,160 8,280 9,670 10,300 10,700 11,400

15206000 Klutina River at Copper Center, AK 2,720 3,000 3,260 3,440 3,650 4,040

15208000 Tonsina River at Tonsina, AK 653 1,020 1,240 1,350 1,470 1,630

15208100 Squirrel Creek at Tonsina, AK 16.3 16.7 17.5 18.3 18.9 20.5

15212000 Copper River near Chitina, AK 50,400 58,300 65,200 73,200 78,700 88,200

15216000 Power Creek near Cordova, AK 214 256 286 305 322 356

15219000 West Fork Olsen Bay Creek near Cordova, AK 7.9 9.8 11.4 13.3 15.3 18.9

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated; Station name: AK, Alaska; BC, British Columbia; YT, Yukon; Daily mean discharge: MONTHn, for the indicated month 

having an n-percent exceedance probability; mi2, square mile; in., inch; –, no data available]

Station No. Station Name Daily mean discharge, in cubic feet per second

AUG98 AUG95 AUG90 AUG85 AUG80 AUG70
Table 8 45

15072000 161 201 42.6 67.6 88.3 111 133 183 248 326

15074000 87.2 108 16.8 27.0 46.2 62.8 77.2 110 140 173

15076000 254 304 93.3 122 154 188 216 270 323 383

15078000 177 248 31.4 36.1 61.0 84.0 112 145 205 265

15080000 233 291 60.2 91.2 125 148 170 214 279 370

15081497 53.0 67.0 9.4 13.0 30.0 39.9 54.0 92.2 138 189

15081500 60.9 75.2 15.1 26.1 54.7 69.1 79.1 99.8 132 186

15081580 13.7 16.4 3.3 4.6 5.8 7.7 9.4 14.3 17.5 22.0

15083500 3.7 4.9 1.1 1.6 2.6 3.5 4.8 7.2 10.7 14.9

15085100 6.3 7.5 1.8 2.6 5.2 6.8 8.2 11 14.4 18.3

15085600 12.1 17.2 2.8 4.8 6.5 8.9 10.8 17.1 25.3 37.3

15085700 59.1 71.1 27.2 34.0 45.3 53.4 62.4 81.7 106 141

15085800 31.2 36.6 14.3 18.7 24.1 27.9 31.3 41.0 52.0 68.9

15086600 24.9 31.3 4.5 10.6 17.6 23.3 28.9 39.9 51.6 67.8

15087545 4.5 5.8 1.1 1.6 2.6 3.4 3.9 4.9 6.4 8.6

15087570 54.4 72.0 9.6 18.2 28.3 37.8 50.0 73.3 105 144

15087590 1.6 2.2 0.3 0.5 0.8 1.4 1.7 2.5 3.3 4.6

15087690 50.8 59.0 33.0 38.3 46.2 53.2 58.0 69.7 84.0 100

15090000R 381 399 127 141 181 205 236 270 357 407

15093400 28.5 35.0 9.3 13.2 16.3 19.8 25.1 33.2 43.1 57.1

15094000 121 135 48.7 57.2 73.2 82.5 91.7 108 122 143

15098000 495 544 159 206 263 297 323 374 425 490

15100000 328 362 144 159 184 201 217 251 277 314

151014901,R 29.7 33.6 13.5 17.1 20.1 23.6 27.4 34.0 39.8 48.2

15101500 72.0 82.9 20.0 33.0 43.2 48.6 53.2 65.8 75.6 89.3

15102000 183 231 69.7 85.0 127 150 179 238 294 348

15106920 17.2 20.2 7.1 10.1 13.6 16.6 19.8 26 32.6 41.8

15106940 7.1 8.2 2.5 3.6 6.3 7.7 9.1 12.2 16.0 19.6

15106960 11.7 13.9 5.6 6.5 8.8 13.2 15.3 18.7 21.7 26.0

15106980 27.5 33.1 15.4 18.6 24.7 28.7 32.1 40.3 49.1 59.3

15107000 60.1 72.6 29.8 36.5 49.8 59.0 68.1 86.5 110 146

15108000 57.3 68.2 24.3 33.5 42.0 49.3 55.9 72.0 92.4 117

15109000 38.0 46.7 9.6 14.6 19.6 24.3 28.6 37.6 46.3 60.7

15120000 548 674 263 290 330 374 397 436 478 566

15120500R 1,950 2,140 913 1,130 1,240 1,300 1,360 1,490 1,590 1,710

15120600 19,800 21,400 4,170 4,750 5,490 6,230 6,830 8,020 8,980 10,100

15129500 174 223 91.6 146 186 214 246 287 328 401

15195000 79.9 95.5 15.5 20.0 29.2 36.3 41.4 55.1 72.8 97.7

15200000 1,840 2,000 331 382 431 494 557 706 785 886

15200280 978 1,090 437 476 588 621 649 784 961 1,150

15202000 12,100 13,200 3,080 3,480 3,890 4,280 4,580 5,200 6,040 6,950

15206000 4,240 4,420 1,270 1,420 1,520 1,670 1,780 2,060 2,310 2,520

15208000 1,770 1,900 394 443 502 543 590 700 839 944

15208100 21.3 22.0 16.8 18.0 18.4 18.8 19.6 20.9 21.5 22.3

15212000 99,500 107,000 22,300 25,400 28,000 31,100 33,500 38,000 43,100 47,400

15216000 392 421 127 150 175 194 214 257 307 363

15219000 22.2 25.4 5.9 7.5 9.8 11.3 12.6 15.3 19.3 25.2

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No. Daily mean discharge, in cubic feet per second

AUG60 AUG50 SEPT98 SEPT95 SEPT90 SEPT85 SEPT80 SEPT70 SEPT60 SEPT50
46 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

152259971,R Solomon Gulch at top of falls near Valdez ,AK 3 61 04 45 146 18 11 – –

15237360 San Juan River near Seward, AK 3 59 49 05 147 53 00 12.4 220

15238600 Spruce Creek near Seward, AK 3 60 04 10 149 27 08 9.26 120

15238820 Barabara Creek near Seldovia, AK 3 59 28 50 151 38 42 20.7 70

15239000R Bradley River near Homer, AK 3 59 45 30 150 51 02 56.1 120

15239050 Middle Fork Bradley River tributary near Homer, AK 3 59 46 42 150 45 15 9.25 70

15239900 Anchor River near Anchor Point, AK 4 59 44 50 151 45 11 137 25

15240000 Anchor River at Anchor Point, AK 4 59 46 21 151 50 05 224 25

15241600 Ninilchik River at Ninilchik, AK 4 60 02 56 151 39 48 131 20

15242000 Kasilof River near Kasilof, AK 4 60 19 05 151 15 35 738 50

15244000 Ptarmigan Creek at Lawing, AK 4 60 24 20 149 21 45 32.6 90

15246000 Grant Creek near Moose Pass, AK 4 60 27 25 149 21 15 44.2 90

15248000 Trail River near Lawing, AK 4 60 26 01 149 22 19 181 90

15254000 Crescent Creek near Cooper Landing, AK 4 60 29 49 149 40 38 31.7 50

15258000R Kenai River at Cooper Landing, AK 4 60 29 34 149 48 28 634 70

152580001,R Kenai River at Cooper Landing, AK, regulated years 4 61 29 34 150 48 28 634 70

15266300 Kenai River at Soldotna, AK 4 60 28 39 151 04 46 1,950 50

15266500 Beaver Creek near Kenai, AK 4 60 33 50 151 07 03 51.0 20

15267900 Resurrection Creek near Hope, AK 4 60 53 40 149 38 13 149 30

15271000 Sixmile Creek near Hope, AK 4 60 49 15 149 25 31 234 60

15272280 Portage Creek at Portage Lake outlet near Whittier, AK 4 60 47 07 148 50 20 40.5 158

15272550 Glacier Creek at Girdwood, AK 4 60 56 29 149 09 44 58.2 70

15273900 South Fork Campbell Creek at canyon mouth near Anchorage, AK 4 61 08 52 149 43 12 25.2 25

15274000 South Fork Campbell Creek near Anchorage, AK 4 61 10 02 149 46 14 29.2 22

15274300 North Fork Campbell Creek near Anchorag, AK 4 61 10 10 149 45 43 13.4 22

152760001,R Ship Creek near Anchorage, AK 4 61 13 32 149 38 06 90.5 30

15277100 Eagle River at Eagle River, AK 4 61 18 28 149 33 32 192 40

15277410 Peters Creek near Birchwood, AK 4 61 25 08 149 29 20 87.8 35

15281000 Knik River near Palmer, AK 4 61 30 18 149 01 50 1,180 100

15282000 Caribou Creek near Sutton, AK 4 61 48 12 147 40 57 289 25

15284000 Matanuska River at Palmer, AK 4 61 36 34 149 04 16 2,070 35

15290000 Little Susitna River near Palmer, AK 4 61 42 37 149 13 47 61.9 50

15291000 Susitna River near Denali, AK 4 63 06 14 147 30 57 950 50

15291200 Maclaren River near Paxson, AK 4 63 07 10 146 31 45 280 50

15291500 Susitna River near Cantwell, AK 4 62 41 55 147 32 42 4,140 30

15292000 Susitna River at Gold Creek, AK 4 62 46 04 149 41 28 6,160 30

15292400 Chulitna River near Talkeetna, AK 4 62 33 31 150 14 02 2,570 55

15292700 Talkeetna River near Talkeetna, AK 4 62 20 49 150 01 01 2,000 35

15294005 Willow Creek near Willow, AK 4 61 46 51 149 53 04 166 30

15294300 Skwentna River near Skwentna, AK 4 61 52 23 151 22 01 2,250 45

15294350 Susitna River at Susitna Station, AK 4 61 32 41 150 30 45 19,400 35

15294450 Chuitna River near Tyonek, AK 4 61 06 31 151 15 07 131 45

15294500 Chakachatna River near Tyonek, AK 4 61 12 44 152 21 26 1,120 80

15295600R Terror River near Kodiak, AK 3 57 39 05 153 01 46 15.0 130

15296000 Uganik River near Kodiak, AK 3 57 41 06 153 25 10 123 75

15297200 Myrtle Creek near Kodiak, AK 3 57 36 12 152 24 12 4.74 130

15297900 Eskimo Creek at King Salmon, AK 4 58 41 08 156 40 08 16.1 20

1Record indicates regulated years. Station not included in regression analysis.

2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: MONTHn, for the indicated 

month having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2

)

Mean annual 

precipitation 

(in.)

(degrees, minutes, 

seconds)
Table 8 47

152259971,R – – 2.3 2.9 3.2 3.5 3.8 4.3 5.0 7.8

15237360 652 0 15.5 19.2 24.5 28.9 32.5 40.1 53.1 63.2

15238600 1,990 8 73.1 87.7 103 115 124 138 151 166

15238820 1,610 0 48.7 58.0 70.0 81.0 89.3 104 120 139

15239000R 2,800 36 673 716 763 801 839 903 954 1,020

15239050 3,920 28 94.6 100 108 115 120 128 138 149

15239900 1,120 0 64.8 72.1 79.1 86.3 91.8 99.6 108 118

15240000 970 0 47.2 68.6 88.8 101 112 132 153 179

15241600 670 0 49.3 52.8 56.3 59.3 61.7 65.8 69.7 74.5

15242000 1,810 28 1,460 1,730 2,140 2,390 2,580 2,970 3,380 3,800

15244000 2,800 12 141 166 185 197 208 225 245 263

15246000 2,900 18 298 344 382 397 406 437 466 496

15248000 2,470 11 1,430 1,520 1,610 1,670 1,730 1,820 1,930 2,010

15254000 2,700 0 69.0 76.7 92.5 102 110 124 137 147

15258000R 2,650 10 4,820 5,060 5,430 5,580 5,700 5,930 6,230 6,580

152580001,R 2,650 10 4,630 5,090 5,380 5,640 5,870 6,260 6,590 6,850

15266300 1,750 11 8,550 9,640 10,600 11,300 11,600 12,100 12,600 13,100

15266500 140 0 13.1 13.8 14.4 15.0 15.5 16.5 17.5 18.3

15267900 2,750 0 270 299 332 353 390 444 489 540

15271000 2,460 3 957 1,070 1,220 1,330 1,460 1,660 1,860 2,040

15272280 2,172 42 1,410 1,450 1,520 1,570 1,620 1,730 1,830 1,920

15272550 2,610 11 318 348 389 424 451 492 532 581

15273900 2,760 0 38.9 45.1 50.1 56.8 60.7 65.8 74.0 83.8

15274000 2,530 0 28.4 33.8 43.7 48.2 51.1 56.5 63.8 70.4

15274300 2,670 0 20.3 20.9 22.5 24.0 25.6 28.3 30.8 34.4

152760001,R 3,100 0 86.9 116 148 171 189 215 244 272

15277100 3,120 13 978 1,050 1,180 1,280 1,340 1,460 1,550 1,660

15277410 3,150 2 186 198 214 223 230 248 272 293

15281000 4,000 54 14,400 15,600 17,000 17,900 18,700 20,000 21,000 22,200

15282000 4,190 0 120 144 232 283 319 401 480 547

15284000 4,000 12 7,120 8,320 9,030 9,670 10,200 11,100 12,000 12,800

15290000 3,700 5 179 208 243 270 290 331 376 427

15291000 4,510 25 5,260 6,010 6,800 7,200 7,680 8,440 9,060 9,560

15291200 4,520 19 1,850 2,080 2,290 2,450 2,560 2,730 2,900 3,090

15291500 3,560 7 10,900 11,300 12,300 13,400 14,200 15,300 16,100 17,200

15292000 3,420 5 15,100 16,400 17,800 18,700 19,300 20,800 22,100 23,000

15292400 3,760 27 17,100 18,100 19,900 20,800 21,600 22,900 24,200 25,400

15292700 3,630 7 6,240 6,850 7,320 7,670 7,960 8,490 9,060 9,620

15294005 2,890 0 254 281 352 394 430 489 546 607

15294300 2,810 16 9,480 11,100 12,400 13,400 13,800 14,700 15,600 16,700

15294350 3,200 11 91,600 96,000 102,000 106,000 109,000 115,000 120,000 126,000

15294450 1,120 0 77.7 86.2 96.1 105 116 142 176 211

15294500 3,900 30 6,240 8,120 8,760 9,280 9,860 10,600 11,100 11,900

15295600R 2,300 1 78.8 95.0 126 154 190 234 263 291

15296000 1,830 0 422 498 650 797 918 1,060 1,190 1,330

15297200 700 0 3.0 5.1 6.5 7.7 8.8 12.3 14.6 18.7

15297900 140 0 3.5 4.4 5.0 5.9 6.5 7.4 8.5 9.4

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No.

Mean 

basin 

elevation 

(feet)

Area of 

glaciers 

(percent)

Daily mean discharge, in cubic feet per second

JULY98 JULY95 JULY90 JULY85 JULY80 JULY70 JULY60 JULY50
48 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

152259971,R Solomon Gulch at top of falls near Valdez ,AK 2.2 2.5 3.3 4.0 4.7 6.7

15237360 San Juan River near Seward, AK 11.2 13.2 18.0 24.9 29.7 40.5

15238600 Spruce Creek near Seward, AK 39.9 47.5 59.9 66.8 73.4 86.0

15238820 Barabara Creek near Seldovia, AK 34.6 37.9 41.1 42.8 44.6 49.0

15239000R Bradley River near Homer, AK 534 567 625 698 760 840

15239050 Middle Fork Bradley River tributary near Homer, AK 67.8 80.0 87.8 93.8 100 110

15239900 Anchor River near Anchor Point, AK 53.1 58.6 64.5 69.1 74.8 93.2

15240000 Anchor River at Anchor Point, AK 70.9 86.3 92.2 101 113 138

15241600 Ninilchik River at Ninilchik, AK 44.6 47.2 50.2 54.3 57.1 61.8

15242000 Kasilof River near Kasilof, AK 3,920 4,550 4,770 5,070 5,420 5,800

15244000 Ptarmigan Creek at Lawing, AK 125 130 142 154 164 175

15246000 Grant Creek near Moose Pass, AK 216 237 282 303 320 349

15248000 Trail River near Lawing, AK 809 1,070 1,200 1,300 1,380 1,510

15254000 Crescent Creek near Cooper Landing, AK 54.4 57.2 61.8 65.4 69.2 82.8

15258000R Kenai River at Cooper Landing, AK 3,960 4,310 4,670 4,860 4,990 5,190

152580001,R Kenai River at Cooper Landing, AK, regulated years 3,800 4,240 4,530 4,730 4,960 5,420

15266300 Kenai River at Soldotna, AK 8,500 9,840 10,700 11,300 11,700 12,500

15266500 Beaver Creek near Kenai, AK 11.4 12.5 13.2 13.6 13.9 15.0

15267900 Resurrection Creek near Hope, AK 167 183 203 218 234 263

15271000 Sixmile Creek near Hope, AK 674 714 765 813 850 938

15272280 Portage Creek at Portage Lake outlet near Whittier, AK 770 950 1,140 1,220 1,280 1,410

15272550 Glacier Creek at Girdwood, AK 182 211 256 277 301 339

15273900 South Fork Campbell Creek at canyon mouth near Anchorage, AK 32.3 34.4 36.4 38.8 40.6 44.6

15274000 South Fork Campbell Creek near Anchorage, AK 27.5 30.8 36.2 39.0 41.2 45.6

15274300 North Fork Campbell Creek near Anchorag, AK 12.3 13.4 14.7 16.9 18.2 20.3

152760001,R Ship Creek near Anchorage, AK 75.2 86.8 101 112 123 143

15277100 Eagle River at Eagle River, AK 605 705 898 1,000 1,090 1,240

15277410 Peters Creek near Birchwood, AK 127 141 152 162 178 194

15281000 Knik River near Palmer, AK 11,700 12,200 12,500 14,900 15,800 17,600

15282000 Caribou Creek near Sutton, AK 134 188 216 236 252 284

15284000 Matanuska River at Palmer, AK 2,850 4,670 5,530 6,280 6,850 7,880

15290000 Little Susitna River near Palmer, AK 141 166 189 206 222 249

15291000 Susitna River near Denali, AK 2,180 3,340 4,230 4,720 5,310 6,360

15291200 Maclaren River near Paxson, AK 616 1,060 1,380 1,550 1,730 2,000

15291500 Susitna River near Cantwell, AK 4,830 7,730 9,220 9,890 10,900 12,200

15292000 Susitna River at Gold Creek, AK 10,200 12,500 14,300 15,300 16,100 17,500

15292400 Chulitna River near Talkeetna, AK 8,040 12,800 14,500 15,900 16,800 18,800

15292700 Talkeetna River near Talkeetna, AK 3,880 5,050 5,930 6,400 6,750 7,320

15294005 Willow Creek near Willow, AK 221 254 287 315 335 376

15294300 Skwentna River near Skwentna, AK 4,760 6,640 8,070 9,000 9,640 10,700

15294350 Susitna River at Susitna Station, AK 64,800 72,700 79,900 84,000 88,000 95,600

15294450 Chuitna River near Tyonek, AK 74.8 83.6 92.4 99.3 106 121

15294500 Chakachatna River near Tyonek, AK 5,720 7,540 8,570 8,910 9,270 10,100

15295600R Terror River near Kodiak, AK 42.7 61.7 69.8 73.3 79.7 100

15296000 Uganik River near Kodiak, AK 266 306 359 411 463 560

15297200 Myrtle Creek near Kodiak, AK 2.0 3.8 4.6 5.2 6.1 8.4

15297900 Eskimo Creek at King Salmon, AK 4.8 5.4 6.2 6.6 7.4 8.6

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated; Station name: AK, Alaska; BC, British Columbia; YT, Yukon; Daily mean discharge: MONTHn, for the indicated month 

having an n-percent exceedance probability; mi2, square mile; in., inch; –, no data available]

Station No. Station Name Daily mean discharge, in cubic feet per second

AUG98 AUG95 AUG90 AUG85 AUG80 AUG70
Table 8 49

152259971,R 21.9 57.4 2.4 2.8 3.5 4.4 5.3 8.1 18.4 47.4

15237360 56.7 76.0 19.5 24.7 31.4 39.2 46.9 65.2 88.0 115

15238600 99.3 112 21.1 27.9 34.6 42.5 49.8 63.9 76.1 95.0

15238820 54.0 60.2 31.2 35.7 39.4 42.0 45.5 53.3 60.2 69.5

15239000R 916 1,020 232 261 340 376 424 512 579 687

15239050 122 134 27.0 34.3 42.0 48.0 53.2 62.2 73.3 86.8

15239900 106 120 56.1 59.1 67.8 81.2 92.7 112 132 156

15240000 157 182 118 125 134 147 156 188 223 257

15241600 67.0 73.0 50.1 54.4 58.9 64.5 69.1 77.9 87.0 97.5

15242000 6,130 6,470 3,640 4,120 4,360 4,570 4,820 5,340 5,870 6,270

15244000 189 197 67.0 74.4 82.4 89.2 97.5 111 123 135

15246000 372 398 104 119 141 156 169 200 226 254

15248000 1,620 1,720 424 474 543 613 695 800 914 1,040

15254000 94.4 102 45.8 50.7 55.2 58.8 62.4 72.8 79.7 88.2

15258000R 5,410 5,820 2,010 2,240 2,470 2,670 2,850 3,130 3,490 3,910

152580001,R 5,840 6,150 2,090 2,430 2,900 3,230 3,490 3,950 4,350 4,750

15266300 13,300 14,000 4,670 5,710 6,750 7,340 7,790 8,590 9,610 10,700

15266500 16.1 17.0 13.4 14.2 15.7 16.4 17.1 18.8 20.4 21.8

15267900 294 326 131 143 154 171 190 212 238 266

15271000 1,030 1,120 490 530 578 629 675 755 831 909

15272280 1,570 1,730 218 386 476 702 794 949 1,140 1,330

15272550 368 421 107 137 157 172 191 232 279 321

15273900 48.7 53.9 22.6 27.2 30.7 33.6 36.1 39.9 43.6 48.6

15274000 50.7 55.7 21.0 24.1 30.2 33.8 36.0 40.6 47.2 54.2

15274300 22.4 25.3 9.7 10.9 13.0 15.1 16.3 18.2 20.2 23.2

152760001,R 159 176 60.3 77.0 94.5 105 114 134 152 177

15277100 1,350 1,530 251 297 359 392 422 520 630 753

15277410 212 235 72.1 93.0 112 118 122 133 143 155

15281000 19,200 20,700 4,020 5,040 5,780 6,490 7,170 8,210 9,270 10,300

15282000 315 350 124 147 169 189 196 208 228 254

15284000 8,790 9,550 1,800 2,000 2,300 2,570 2,870 3,390 3,860 4,350

15290000 278 312 86.3 101 116 132 145 170 196 226

15291000 6,990 7,870 1,010 1,210 1,430 1,600 1,800 2,130 2,470 2,820

15291200 2,200 2,440 380 449 518 578 636 734 845 956

15291500 13,400 14,700 2,770 3,370 3,820 4,420 5,150 5,930 6,520 7,180

15292000 18,900 20,500 5,350 6,070 7,120 8,180 8,890 10,100 11,300 12,500

15292400 20,100 21,300 4,940 5,820 6,640 7,050 7,460 8,540 9,490 10,400

15292700 7,840 8,400 1,960 2,460 2,900 3,160 3,390 3,760 4,240 4,860

15294005 442 521 181 225 270 301 338 410 471 534

15294300 11,500 12,400 2,770 3,900 4,560 4,950 5,310 6,110 6,970 7,730

15294350 103,000 109,000 29,100 36,600 41,600 46,800 50,600 55,900 63,300 70,400

15294450 141 169 78.2 86.1 104 121 139 170 221 285

15294500 10,800 11,400 2,290 2,620 2,920 3,210 3,490 4,190 4,650 5,540

15295600R 118 144 39.4 43 62.1 69.4 77.2 101 125 148

15296000 645 729 188 213 260 302 346 422 508 603

15297200 11.4 14.8 3.7 5.3 9.0 10.9 13.2 17.4 23.0 28.8

15297900 9.4 10.6 6.4 7.0 7.8 8.5 9.5 10.7 11.5 12.4

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No. Daily mean discharge, in cubic feet per second

AUG60 AUG50 SEPT98 SEPT95 SEPT90 SEPT85 SEPT80 SEPT70 SEPT60 SEPT50
50 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15300000 Newhalen River near Iliamna, AK 4 59 51 34 154 52 24 3,480 40

15300500 Kvichak River at Igiugig, AK 4 59 19 44 155 53 57 6,500 40

15302000 Nuyakuk River near Dillingham, AK 4 59 56 08 158 11 16 1,490 60

15302500 Nushagak River at Ekwok, AK 4 59 20 57 157 28 23 9,850 30

15303000 Wood River near Aleknagik, AK 4 59 16 30 158 35 37 1,110 60

15303150 Snake River near Dillingham, AK 4 59 08 54 158 53 14 113 50

15303600 Kuskokwim River at McGrath, AK 6 62 57 10 155 35 11 11,700 23

15303700 Tatalina River near Takotna, AK 6 62 53 06 155 56 22 76.9 20

15304000 Kuskokwim River at Crooked Creek, AK 6 61 52 16 158 06 03 31,100 22

15304520 Lubbock River near Atlin, BC 5 60 04 52 133 51 30 683 11

15304550 Pine Creek near Atlin, BC 5 59 33 40 133 39 56 269 12

15304600 Atlin River near Atlin, BC 2 59 35 57 133 48 48 2,630 12

15304650 Wann River near Atlin, BC 2 59 25 55 134 12 20 104 32

15304700 Fantail River at outlet of Fantail Lake near Atlin, BC 2 59 35 40 134 23 26 277 32

15304750 Tutshi River at outlet of Tutshi Lake near Atlin, BC 2 59 56 48 134 19 29 320 24

15304800 Lindeman River near Bennett, BC 2 59 50 12 135 00 44 92.7 52

15304850 Wheaton River near Carcross, YT 2 60 08 05 134 53 45 338 12

15304920 Tagish Creek near Carcross, YT 5 60 17 32 134 18 00 29.7 12

15304950 Maclintock River near Whitehorse, YT 5 60 36 45 134 27 27 656 12

15305000 Yukon River at Whitehorse, YT 5 60 42 50 135 02 35 7,490 15

15305030 Takhini River at Kusawa Lake at Whitehorse, YT 5 60 36 46 136 07 26 1,570 16

15305050 Takhini River near Whitehorse, YT 5 60 51 08 135 44 21 2,700 14

15305100 Yukon River above Frank Creek, YT 5 61 26 04 135 11 18 11,900 14

15305150 Swift River near Swift River, BC 5 59 55 50 131 46 04 1,280 18

15305200 Gladys River at outlet of Gladys Lake near Atlin, BC 5 59 54 20 132 54 50 737 12

15305250 Teslin River near Teslin, YT 5 60 29 07 133 18 04 11,700 13

15305260 Teslin River near Whitehorse, YT 5 61 29 25 134 46 35 14,100 12

15305300 Big Salmon River near Carmacks, YT 5 61 52 22 134 50 00 2,610 13

15305350 Yukon River at Carmacks, YT 5 62 05 45 136 16 18 31,600 12

15305360 Big Creek near mouth near Minto, YT 5 62 34 07 137 00 58 676 12

15305390 Ross River at Ross River, YT 5 61 59 40 132 22 40 2,800 12

15305400 Pelly River at Ross River, YT 5 61 59 12 132 26 54 7,100 12

15305406 Pelly River at Faro,YT 5 62 13 20 133 22 40 8,530 12

15305412 South MacMillan River at Canol Road near Ross River, YT 5 62 55 20 130 32 00 385 24

15305420 Pelly River at Pelly Crossing, YT 5 62 49 47 136 34 50 18,900 20

15305450 Yukon River above White River near Dawson, YT 5 63 05 02 139 29 40 57,900 10

15305500 Kluane River at outlet of Kluane Lake, YT 2 61 25 37 139 02 56 1,910 20

15305540 White River at Alaska Highway near Koidern, BC 2 61 58 41 140 33 10 2,410 22

15305582 Stewart River above Fraser Falls near Mayo,YT 5 63 29 17 135 08 06 11,800 14

15305590 Stewart River at Mayo, YT 5 63 35 26 135 53 48 12,200 15

15305620 Stewart River at Stewart Crossing, YT 5 63 22 56 136 40 59 13,500 15

15305650 Stewart River at mouth, YT 5 63 16 55 139 14 56 19,700 12

15305695 North Klondike River near mouth near Dawson, YT 5 64 01 16 138 34 58 425 16

15305698 Klondike River above Bonanza Creek near Dawson, YT 5 64 02 34 139 24 28 3,010 16

15305700 Yukon River at Dawson, YT 5 64 04 12 139 25 30 102,000 10

15356000 Yukon River at Eagle, AK 5 64 47 22 141 11 52 114,000 12

15388950 Porcupine River at Old Crow, YT 5 67 33 50 139 53 00 21,400 10

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: MONTHn, for the indicated 

month having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2

)

Mean annual 

precipitation 

(in.)

(degrees, minutes, 

seconds)
Table 8 51

15300000 2,160 8 14,300 15,800 16,400 16,800 17,100 18,200 19,100 20,600

15300500 1,790 6 13,000 13,700 14,200 15,100 15,800 16,800 17,700 19,000

15302000 1,100 0 6,060 7,070 8,380 9,160 9,810 11,100 12,500 13,600

15302500 988 1 18,600 20,300 22,300 24,000 25,500 27,700 29,500 31,500

15303000 690 0 4,120 5,270 5,700 6,040 6,360 6,870 7,510 8,250

15303150 540 0 296 323 356 386 404 447 528 606

15303600 1,850 0 17,500 18,200 19,300 19,800 20,300 22,000 23,600 25,200

15303700 890 0 18.2 20.9 26.3 31.0 34.4 43.1 49.2 55.4

15304000 1,480 1 40,500 43,800 47,600 49,800 51,900 56,000 59,900 64,100

15304520 4,190 0 40.7 50.4 62.7 71.7 82.8 99 119 143

15304550 3,880 0 265 312 329 341 350 370 389 410

15304600 3,500 4 2,510 2,810 3,130 3,390 3,590 3,960 4,340 4,730

15304650 5,310 6 426 491 555 588 620 669 708 762

15304700 5,030 20 1,400 1,630 1,800 1,940 2,030 2,200 2,340 2,470

15304750 4,290 0 866 971 1,050 1,120 1,180 1,320 1,440 1,510

15304800 4,840 8 562 617 674 728 765 819 888 954

15304850 4,620 1 366 407 444 474 511 570 629 693

15304920 3,530 0 4.1 4.5 5.1 5.9 8.0 9.0 9.5 10.5

15304950 3,560 0 142 234 262 302 332 388 442 498

15305000 3,680 5 9,610 10,500 11,400 12,100 12,700 13,700 14,400 15,200

15305030 4,540 6 3,180 3,430 4,010 4,390 4,700 5,010 5,290 5,500

15305050 4,270 3 3,570 4,220 4,810 5,160 5,390 5,670 5,950 6,260

15305100 3,800 4 11,100 12,400 13,900 15,000 16,200 18,000 19,500 20,700

15305150 4,230 0 1,100 1,400 1,650 1,810 2,000 2,290 2,610 2,890

15305200 4,000 0 544 761 857 912 964 1,050 1,130 1,240

15305250 3,920 0 11,400 13,800 15,500 16,700 17,700 20,000 22,300 24,800

15305260 3,880 0 10,400 15,600 19,000 20,300 21,300 23,100 24,800 26,700

15305300 4,140 0 2,040 2,450 2,920 3,210 3,440 3,930 4,330 4,740

15305350 4,000 1 32,600 34,700 40,500 43,300 46,200 49,300 51,900 55,000

15305360 3,340 0 75.2 87.2 107 129 167 246 340 438

15305390 3,590 0 1,750 2,040 2,370 2,590 2,760 3,130 3,520 3,920

15305400 3,870 0 5,130 6,520 7,320 7,830 8,300 9,190 10,300 11,400

15305406 3,780 0 4,710 5,700 6,780 7,620 8,290 9,860 11,500 12,700

15305412 4,540 1 854 915 1,020 1,120 1,200 1,340 1,500 1,640

15305420 3,660 0 12,200 13,300 14,900 16,400 17,700 20,100 22,500 24,900

15305450 3,770 1 47,400 52,800 58,100 62,000 65,800 71,700 76,400 83,800

15305500 4,390 4 3,170 3,590 4,250 4,670 5,030 5,740 6,360 6,830

15305540 6,180 28 5,700 7,690 9,190 10,300 11,200 12,700 14,200 15,600

15305582 3,800 0 12,400 13,600 15,700 17,300 18,400 20,800 22,700 24,500

15305590 3,780 0 12,300 13,100 15,500 18,200 20,200 23,400 25,900 28,700

15305620 3,660 0 13,300 15,400 17,100 19,900 22,200 25,000 27,500 30,100

15305650 3,600 0 14,300 16,200 18,200 20,100 21,500 24,400 26,900 29,300

15305695 3,730 0 339 384 446 487 526 592 655 722

15305698 3,230 0 1,390 1,600 1,840 2,030 2,200 2,500 2,860 3,200

15305700 3,590 1 114,000 119,000 128,000 133,000 139,000 147,000 154,000 163,000

15356000 3,340 3 115,000 124,000 132,000 139,000 145,000 155,000 165,000 175,000

15388950 1,810 0 3,710 4,470 5,300 5,890 6,510 7,940 9,970 12,700

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No.

Mean 

basin 

elevation 

(feet)

Area of 

glaciers 

(percent)

Daily mean discharge, in cubic feet per second

JULY98 JULY95 JULY90 JULY85 JULY80 JULY70 JULY60 JULY50
52 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15300000 Newhalen River near Iliamna, AK 14,900 15,900 17,000 17,500 17,900 18,800

15300500 Kvichak River at Igiugig, AK 15,000 16,800 18,100 18,700 19,100 20,100

15302000 Nuyakuk River near Dillingham, AK 4,330 5,000 5,520 6,100 6,470 7,190

15302500 Nushagak River at Ekwok, AK 15,700 17,200 19,100 20,500 21,500 23,700

15303000 Wood River near Aleknagik, AK 3,090 3,730 4,150 4,290 4,470 4,690

15303150 Snake River near Dillingham, AK 195 229 244 264 286 372

15303600 Kuskokwim River at McGrath, AK 13,400 16,500 17,900 18,600 19,300 20,900

15303700 Tatalina River near Takotna, AK 18.7 20.5 28.4 33.8 39.6 52.7

15304000 Kuskokwim River at Crooked Creek, AK 38,100 41,000 44,600 47,800 51,400 57,900

15304520 Lubbock River near Atlin, BC 31.7 36.4 50.6 58.8 63.0 74.8

15304550 Pine Creek near Atlin, BC 107 113 206 217 224 244

15304600 Atlin River near Atlin, BC 4,850 5,170 5,520 5,940 6,210 6,490

15304650 Wann River near Atlin, BC 288 329 376 408 445 500

15304700 Fantail River at outlet of Fantail Lake near Atlin, BC 994 1,150 1,360 1,500 1,600 1,770

15304750 Tutshi River at outlet of Tutshi Lake near Atlin, BC 576 652 706 748 777 835

15304800 Lindeman River near Bennett, BC 343 394 439 474 505 556

15304850 Wheaton River near Carcross, YT 228 252 275 296 325 369

15304920 Tagish Creek near Carcross, YT 4.0 4.1 4.3 4.7 5.7 7.2

15304950 Maclintock River near Whitehorse, YT 117 169 209 230 251 295

15305000 Yukon River at Whitehorse, YT 12,700 13,500 14,200 14,900 15,300 16,000

15305030 Takhini River at Kusawa Lake at Whitehorse, YT 3,390 3,540 3,790 3,940 4,080 4,410

15305050 Takhini River near Whitehorse, YT 3,630 3,870 4,230 4,520 4,700 4,980

15305100 Yukon River above Frank Creek, YT 16,700 18,700 20,000 20,800 21,300 22,200

15305150 Swift River near Swift River, BC 731 968 1,080 1,190 1,270 1,410

15305200 Gladys River at outlet of Gladys Lake near Atlin, BC 269 440 478 526 562 611

15305250 Teslin River near Teslin, YT 7,090 8,320 9,710 10,800 11,400 12,400

15305260 Teslin River near Whitehorse, YT 6,870 7,960 11,000 12,500 13,400 14,900

15305300 Big Salmon River near Carmacks, YT 1,880 2,030 2,190 2,340 2,470 2,720

15305350 Yukon River at Carmacks, YT 30,600 32,200 33,900 36,000 38,200 41,100

15305360 Big Creek near mouth near Minto, YT 60.2 70.2 98.7 120 148 221

15305390 Ross River at Ross River, YT 1,070 1,270 1,510 1,750 1,920 2,230

15305400 Pelly River at Ross River, YT 3,420 3,870 4,420 4,990 5,250 5,970

15305406 Pelly River at Faro,YT 3,550 3,950 4,620 5,240 5,850 7,090

15305412 South MacMillan River at Canol Road near Ross River, YT 479 520 577 626 672 761

15305420 Pelly River at Pelly Crossing, YT 7,830 8,900 9,810 10,900 12,100 13,900

15305450 Yukon River above White River near Dawson, YT 39,800 42,900 50,000 52,500 55,000 58,200

15305500 Kluane River at outlet of Kluane Lake, YT 2,910 3,700 5,020 6,760 7,460 8,090

15305540 White River at Alaska Highway near Koidern, BC 3,720 4,410 5,540 6,170 6,910 8,200

15305582 Stewart River above Fraser Falls near Mayo,YT 7,710 8,940 10,900 12,300 13,600 15,100

15305590 Stewart River at Mayo, YT 9,530 10,500 12,000 13,000 13,700 15,300

15305620 Stewart River at Stewart Crossing, YT 12,100 13,200 14,400 15,100 15,900 17,100

15305650 Stewart River at mouth, YT 10,900 12,800 14,300 15,600 16,700 18,000

15305695 North Klondike River near mouth near Dawson, YT 322 340 368 392 414 452

15305698 Klondike River above Bonanza Creek near Dawson, YT 1,120 1,250 1,420 1,510 1,640 1,920

15305700 Yukon River at Dawson, YT 92,000 96,200 104,000 107,000 111,000 119,000

15356000 Yukon River at Eagle, AK 91,200 99,400 109,000 11,4000 118,000 12,5000

15388950 Porcupine River at Old Crow, YT 1,600 3,220 3,810 4,340 6,100 9,120

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated; Station name: AK, Alaska; BC, British Columbia; YT, Yukon; Daily mean discharge: MONTHn, for the indicated month 

having an n-percent exceedance probability; mi2, square mile; in., inch; –, no data available]

Station No. Station Name Daily mean discharge, in cubic feet per second

AUG98 AUG95 AUG90 AUG85 AUG80 AUG70
Table 8 53

15300000 20,200 21,000 9,170 10,700 12,000 13,400 14,600 16,300 17,300 18,100

15300500 21,100 23,200 17,000 17,900 19,000 19,500 20,100 21,000 22,800 25,200

15302000 7,810 8,480 4,020 4,650 5,080 5,400 5,680 6,250 6,810 7,450

15302500 26,000 27,600 12,800 13,400 14,900 20,500 21,500 23,800 25,900 28,400

15303000 5,190 5,560 3,260 3,680 3,810 3,910 4,010 4,470 5,280 5,700

15303150 403 431 206 225 269 315 362 406 450 526

15303600 22,600 24,500 9,130 9,480 10,100 10,800 11,600 12,700 14,200 16,000

15303700 63.5 77.5 19.3 22.1 28.0 47.4 52.2 59.8 70.7 84.4

15304000 63,000 69,200 29,700 34,000 38,100 40,900 43,700 49,300 54,400 60,200

15304520 88.2 100 24.6 32.3 52.6 62.0 69.5 80.8 94.4 106

15304550 262 282 82.8 91.1 100 171 176 190 201 211

15304600 6,830 7,180 4,660 5,040 5,530 5,850 6,050 6,370 6,650 7,040

15304650 557 607 115 132 150 170 188 225 263 299

15304700 1,940 2,110 356 424 500 563 624 737 879 1,040

15304750 888 938 406 439 472 499 517 549 600 657

15304800 616 674 156 185 215 236 253 295 340 392

15304850 409 446 167 178 192 203 214 235 253 279

15304920 7.9 8.3 4.8 5.2 5.7 6.0 6.5 7.1 7.7 8.4

15304950 332 374 142 189 219 241 259 302 336 362

15305000 16,600 17,200 7,800 8,750 10,300 12,100 13,500 14,700 15,500 16,100

15305030 4,650 4,900 1,950 2,060 2,250 2,370 2,460 2,670 2,840 3,030

15305050 5,270 5,530 2,190 2,430 2,660 2,810 2,950 3,170 3,390 3,600

15305100 22,700 23,300 14,300 15,500 16,900 18,200 18,900 20,200 21,200 22,000

15305150 1,530 1,700 535 942 1,040 1,110 1,220 1,380 1,510 1,630

15305200 650 695 200 319 363 379 398 434 461 495

15305250 13,300 14,300 5,710 6,550 7,310 7,880 8,860 9,840 10,400 11,200

15305260 16,000 17,000 6,100 6,250 9,230 9,990 10,200 11,600 12,700 13,600

15305300 2,970 3,230 1,590 1,730 1,880 2,000 2,120 2,340 2,580 2,860

15305350 43,500 45,500 27,800 29,400 31,200 32,500 33,500 35,600 37,000 38,500

15305360 293 353 79.6 89.0 99.8 113 132 180 231 268

15305390 2,450 2,700 843 1,080 1,310 1,450 1,560 1,850 2,140 2,320

15305400 6,940 7,780 2,020 3,350 4,010 4,150 4,370 5,210 6,000 6,650

15305406 7,700 8,430 3,500 3,650 4,110 5,010 5,410 6,130 6,760 7,420

15305412 854 952 313 354 392 420 442 492 554 616

15305420 15,200 16,900 6,720 8,210 9,040 9,710 10,700 12,300 13,900 15,200

15305450 62,000 65,000 33,700 39,600 42,600 45,200 47,200 49,700 52,600 55,400

15305500 8,610 9,060 1,910 2,250 2,930 3,750 4,340 5,120 5,660 6,130

15305540 9,310 10,500 1,450 1,580 1,700 1,860 2,010 2,280 2,500 2,850

15305582 16,800 18,300 6,110 6,420 7,200 8,020 9,350 11,600 13,600 15,300

15305590 17,300 19,000 8,650 10,100 10,800 11,300 11,800 12,400 13,100 14,000

15305620 18,300 19,500 10,400 10,800 11,500 12,500 13,000 13,700 14,800 16,600

15305650 19,300 21,300 8,470 9,690 10,900 12,000 12,900 14,600 16,700 18,600

15305695 505 559 273 286 306 324 347 398 444 484

15305698 2,190 2,490 1,190 1,290 1,390 1,510 1,610 1,810 2,100 2,380

15305700 125,000 132,000 69,400 74,000 77,700 80,900 84,500 91,100 96,700 101,000

15356000 133,000 140,000 70,300 77,700 82,000 86,700 90,500 97,200 104,000 110,000

15388950 12,900 16,200 2,530 3,720 5,200 6,820 7,760 9,700 11,400 13,200

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No. Daily mean discharge, in cubic feet per second

AUG60 AUG50 SEPT98 SEPT95 SEPT90 SEPT85 SEPT80 SEPT70 SEPT60 SEPT50
54 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15388960 Porcupine River near International Boundary, YT 5 67 25 27 140 53 28 23,100 10

15389000 Porcupine River near Fort Yukon, AK 5 66 59 26 143 08 16 29,500 10

15389500 Chandalar River near Venetie, AK 5 67 05 49 147 11 04 9,330 10

15439800 Boulder Creek near Central, AK 6 65 34 05 144 53 13 31.3 15

15453500 Yukon River near Stevens Village, AK 6 65 52 32 149 43 04 196,300 15

15457800 Hess Creek near Livengood, AK 6 65 39 55 149 05 47 662 15

15468000 Yukon River at Rampart, AK 6 65 30 25 150 10 15 199,000 15

15470000 Chisana River at Northway Junction, AK 6 63 00 23 141 48 17 3,280 20

15476000 Tanana River near Tanacross, AK 6 63 23 18 143 44 47 8,550 18

15476300 Berry Creek near Dot Lake, AK 6 63 41 23 144 21 47 65.1 18

15478040 Phelan Creek near Paxson, AK 6 63 14 27 145 28 03 12.2 80

15484000 Salcha River near Salchaket, AK 6 64 28 22 146 55 26 2,170 15

154855002 Tanana River at Fairbanks, AK 6 64 47 34 147 50 20 – 15

15493000 Chena River near Two Rivers, AK 6 64 54 10 146 21 25 937 16

154937001,R Chena River below Moose Creek Dam, AK 6 64 48 03 147 13 40 – –

15511000 Little Chena River near Fairbanks, AK 6 64 53 10 147 14 50 372 15

15514000 Chena River at Fairbanks, AK 6 64 50 45 147 42 04 2,000 15

15514500 Wood River near Fairbanks, AK 6 64 26 06 148 12 46 855 15

15515500 Tanana River at Nenana, AK 6 64 33 55 149 05 30 25,600 16

15515800 Seattle Creek near Cantwell, AK 6 63 19 32 148 14 49 36.2 20

15516000 Nenana River near Windy, AK 6 63 27 28 148 48 11 710 30

15518000 Nenana River near Healy, AK 6 63 50 43 148 56 37 1,910 25

15518080 Lignite Creek above mouth near Healy, AK 6 63 54 17 148 59 01 48.1 25

15518350 Teklanika River near Lignite, AK 6 63 55 14 149 29 51 490 25

15535000 Caribou Creek near Chatanika, AK 6 65 09 00 147 33 05 9.19 15

15564600 Melozitna River near Ruby, AK 6 64 47 34 155 33 39 2,690 15

15564800 Yukon River at Ruby, AK 6 64 44 28 155 29 22 259,000 15

15564875 Middle Fork Koyukuk River near Wiseman, AK 6 67 26 18 150 04 30 1,200 25

15564900 Koyukuk River at Hughes, AK 6 66 02 51 154 15 30 18,400 16

15565200 Yukon River near Kaltag, AK 6 64 19 40 158 43 10 296,000 15

15565447 Yukon River at Pilot Station, AK 6 61 56 04 162 52 50 321,000 16

15621000 Snake River near Nome, AK 7 64 33 51 165 30 26 85.7 30

15635000 Eldorado Creek near Teller, AK 7 64 57 38 166 11 59 5.83 18

15668200 Crater Creek near Nome, AK 7 64 55 48 164 52 12 21.9 35

15712000 Kuzitrin River near Nome, AK 7 65 13 17 164 37 15 1,720 15

15743850 Dahl Creek near Kobuk, AK 7 66 56 46 156 54 32 11.0 18

15744000 Kobuk River at Ambler, AK 7 67 05 13 157 50 51 6,570 25

15744500 Kobuk River near Kiana, AK 7 66 58 25 160 07 51 9,520 25

15747000 Wulik River below Tutak Creek near Kivalina, AK 7 67 52 34 163 40 28 705 15

15896000 Kuparuk River near Deadhorse, AK 7 70 16 54 148 57 35 3,130 9

15896700 Putuligayuk River near Deadhorse, AK 7 70 16 03 148 37 41 176 8

15904900 Atigun River tributary near Pump Station 4, AK 7 68 22 25 149 18 48 32.6 25

15906000 Sagavanirktok River tributary near Pump Station 3, AK 7 68 41 13 149 05 42 28.4 18

15908000 Sagavanirktok River near Pump Station 3, AK 7 69 00 54 148 49 02 1,860 18

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: MONTHn, for the indicated 

month having an n-percent exceedance probability. mi2, square mile; in., inch; –, no data available]

Station No. Station Name Region

Latitude Longitude Drainage 

area 

(mi2)

Mean annual 

precipitation 

(in.)

(degrees, minutes, 

seconds)
Table 8 55

15388960 1,800 0 4,500 5,030 5,720 6,230 6,860 8,250 9,340 10,900

15389000 1,800 0 5,260 6,450 7,050 8,290 9,440 11,400 14,300 17,300

15389500 3,160 0 3,870 5,040 5,690 6,140 6,600 7,590 9,020 10,400

15439800 2,570 0 1.6 2.0 2.6 3.4 4.2 5.5 8.5 12.7

15453500 2,830 2 151,000 164,000 176,000 185,000 192,000 204,000 216,000 226,000

15457800 1,400 0 11.8 21.1 32.0 40.9 48.5 69.7 96.9 128

15468000 2,810 2 161,000 170,000 179,000 192,000 205,000 228,000 243,000 260,000

15470000 3,730 5 3,620 3,890 4,180 4,410 4,600 5,100 5,650 6,110

15476000 3,860 7 13,000 14,300 15,700 16,700 17,700 19,200 20,900 22,200

15476300 3,200 5 49.3 55.6 60.0 64.4 66.6 70.5 74.6 79.1

15478040 5,800 69 90.5 129 154 179 197 228 255 286

15484000 2,520 0 635 827 1,040 1,170 1,280 1,510 1,790 2,090

154855002 – – 33,500 36,500 40,300 42,000 43,400 46,700 48,800 51,800

15493000 2,270 0 252 326 424 474 522 614 702 785

154937001,R – – 436 545 691 781 848 969 1,100 1,220

15511000 1,480 0 77.5 90.4 107 133 153 189 219 247

15514000 1,770 0 621 713 886 995 1,110 1,290 1,490 1,680

15514500 2,720 2 653 734 782 824 871 966 1,050 1,150

15515500 3,920 6 41,200 43,800 47,200 49,400 50,900 53,200 55,500 58,100

15515800 3,400 0 18.3 20.9 23.7 27.1 29.3 33.6 38.2 44.2

15516000 3,470 2 1,220 1,410 1,610 1,730 1,860 2,030 2,200 2,450

15518000 3,500 4 5,120 5,720 6,440 6,910 7,290 7,920 8,530 9,190

15518080 2,460 0 18.0 19.4 21.6 23.1 24.6 27.6 30.4 33.5

15518350 3,420 2 678 774 891 1,010 1,100 1,240 1,400 1,580

15535000 1,640 0 1.8 2.0 2.2 2.7 3.3 4.3 5.1 5.9

15564600 1,410 0 462 517 1,060 1,240 1,350 1,610 1,890 2,080

15564800 2,640 1 235,000 250,000 264,000 275,000 284,000 303,000 318,000 332,000

15564875 3,390 0 496 516 557 618 720 930 1,070 1,220

15564900 2,200 0 4,920 6,660 8,620 10,200 11,600 13,900 16,800 19,400

15565200 2,490 1 287,000 293,000 314,000 338,000 351,000 377,000 398,000 434,000

15565447 2,337 1 309,000 337,000 359,000 382,000 397,000 412,000 427,000 444,000

15621000 632 0 61.7 69.2 76.7 83.2 91.1 104 120 141

15635000 1,310 0 2.2 2.5 3.9 4.8 5.7 7.0 8.6 10.9

15668200 1,620 0 38.7 43.0 47.1 50.4 53.9 66.3 80.6 91.8

15712000 700 0 303 332 397 423 456 557 696 849

15743850 1,500 0 8.2 9.0 12.7 15.6 17.4 24.5 31.9 36.7

15744000 1,610 0 4,070 5,700 6,430 6,880 7,720 8,850 10,000 11,800

15744500 1,450 0 8,200 9,400 10,500 11,400 12,300 13,800 15,600 17,700

15747000 830 0 309 344 398 441 490 678 807 966

15896000 900 0 199 225 258 291 323 391 521 691

15896700 135 0 0.6 1.1 2.2 2.9 3.8 5.7 7.8 10.4

15904900 5,100 4 11.6 17.0 35.4 53.3 64.6 76.8 93.5 106

15906000 2,869 0 3.6 4.7 6.8 7.7 8.5 10.8 13.3 16.3

15908000 3,580 1 1,840 2,260 2,520 2,840 3,050 3,420 3,690 4,080

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No.

Mean 

basin 

elevation 

(feet)

Area of 

glaciers 

(percent)

Daily mean discharge, in cubic feet per second

JULY98 JULY95 JULY90 JULY85 JULY80 JULY70 JULY60 JULY50
56 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15388960 Porcupine River near International Boundary, YT 5,790 6,710 7,620 8,500 8,980 10,700

15389000 Porcupine River near Fort Yukon, AK 4,300 4,730 5,930 6,690 7,240 9,830

15389500 Chandalar River near Venetie, AK 3,190 3,640 4,530 4,790 5,070 6,140

15439800 Boulder Creek near Central, AK 0.8 1.5 2.0 2.5 3.0 4.2

15453500 Yukon River near Stevens Village, AK 136,000 146,000 153,000 158,000 160,000 169,000

15457800 Hess Creek near Livengood, AK 9.0 19.1 24.5 34 44.9 80.2

15468000 Yukon River at Rampart, AK 125,000 140,000 148,000 160,000 167,000 183,000

15470000 Chisana River at Northway Junction, AK 2,110 2,710 3,140 3,650 3,920 4,310

15476000 Tanana River near Tanacross, AK 9,860 11,100 13,400 14,500 15,600 17,400

15476300 Berry Creek near Dot Lake, AK 38.2 42.6 46.0 48.0 51.0 56.4

15478040 Phelan Creek near Paxson, AK 33.6 47.5 81.2 111 137 174

15484000 Salcha River near Salchaket, AK 768 893 1,100 1,290 1,410 1,640

154855002 Tanana River at Fairbanks, AK 28,700 31,500 34,300 36,700 38,900 42,300

15493000 Chena River near Two Rivers, AK 375 453 533 600 648 734

154937001,R Chena River below Moose Creek Dam, AK 686 752 837 895 947 1,050

15511000 Little Chena River near Fairbanks, AK 95.7 118 136 158 172 200

15514000 Chena River at Fairbanks, AK 716 806 1,020 1,140 1,230 1,380

15514500 Wood River near Fairbanks, AK 497 530 607 725 816 927

15515500 Tanana River at Nenana, AK 33,500 36,500 40,200 43,200 45,400 49,300

15515800 Seattle Creek near Cantwell, AK 18.5 19.4 21.0 22.3 23.2 26.2

15516000 Nenana River near Windy, AK 744 1,110 1,280 1,460 1,540 1,700

15518000 Nenana River near Healy, AK 3,320 4,270 4,910 5,180 5,560 6,210

15518080 Lignite Creek above mouth near Healy, AK 15.7 18.6 21.2 23 24.5 26.7

15518350 Teklanika River near Lignite, AK 620 679 821 900 947 1,030

15535000 Caribou Creek near Chatanika, AK 1.0 1.9 2.2 2.9 3.4 4.8

15564600 Melozitna River near Ruby, AK 700 765 914 1,000 1,100 1,250

15564800 Yukon River at Ruby, AK 205,000 223,000 244,000 251,000 256,000 267,000

15564875 Middle Fork Koyukuk River near Wiseman, AK 414 432 478 544 598 738

15564900 Koyukuk River at Hughes, AK 6,980 7,740 8,560 9,870 11,300 14,200

15565200 Yukon River near Kaltag, AK 230,000 242,000 271,000 279,000 288,000 318,000

15565447 Yukon River at Pilot Station, AK 308,000 314,000 326,000 338,000 350,000 369,000

15621000 Snake River near Nome, AK 58.7 64.7 72.9 80.5 101 132

15635000 Eldorado Creek near Teller, AK 5.2 6.1 6.9 7.4 9.1 12.8

15668200 Crater Creek near Nome, AK 29.5 32.9 38.1 44.8 50.4 57.4

15712000 Kuzitrin River near Nome, AK 318 337 377 403 436 513

15743850 Dahl Creek near Kobuk, AK 11.6 13.0 17.4 20.5 24.7 34.7

15744000 Kobuk River at Ambler, AK 5,820 6,120 6,460 6,830 7,270 8,370

15744500 Kobuk River near Kiana, AK 7,200 8,090 9,580 11,200 12,900 16,500

15747000 Wulik River below Tutak Creek near Kivalina, AK 301 374 511 612 672 969

15896000 Kuparuk River near Deadhorse, AK 121 142 164 186 214 281

15896700 Putuligayuk River near Deadhorse, AK 0.03 0.2 0.5 0.6 0.7 1.0

15904900 Atigun River tributary near Pump Station 4, AK 16.8 18.8 20.9 25.8 30.4 38.5

15906000 Sagavanirktok River tributary near Pump Station 3, AK 2.2 2.5 10.9 16.3 18.0 21.5

15908000 Sagavanirktok River near Pump Station 3, AK 1,510 1,640 1,820 2,050 2,240 2,580

1Record indicates regulated years. Station not included in regression analysis. 2Drainage area is indeterminate. Station not included in regression analysis.

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

[Station No.: R, presently regulated; Station name: AK, Alaska; BC, British Columbia; YT, Yukon; Daily mean discharge: MONTHn, for the indicated month 

having an n-percent exceedance probability; mi2, square mile; in., inch; –, no data available]

Station No. Station Name Daily mean discharge, in cubic feet per second

AUG98 AUG95 AUG90 AUG85 AUG80 AUG70
Table 8 57

15388960 12,500 14,500 2,520 6,140 8,250 9,460 10,300 13,000 15,100 16,600

15389000 13,800 18,100 4,450 5,880 7,410 9,140 10,700 14,000 15,700 17,600

15389500 8,070 10,300 1,260 1,540 2,200 2,560 2,950 3,660 4,110 4,640

15439800 5.2 6.7 0.8 1.5 2.4 3.1 4.0 4.6 5.7 7.5

15453500 178,000 190,000 102,000 111,000 120,000 125,000 130,000 139,000 149,000 160,000

15457800 121 198 41.2 56.4 64.9 74.5 88.1 122 166 230

15468000 207,000 221,000 98,700 110,000 117,000 130,000 138,000 152,000 164,000 171,000

15470000 4,810 5,250 1,600 1,740 1,880 1,960 2,020 2,200 2,400 2,620

15476000 18,900 20,700 5,620 6,250 6,770 7,120 7,480 8,260 8,970 9,670

15476300 61.0 67.2 29.9 31.1 32.8 33.9 34.9 37.5 40.2 42.6

15478040 201 227 9.3 11.7 13.8 17.0 20.4 26.4 34.1 42.9

15484000 1,940 2,290 707 840 1,020 1,200 1,290 1,490 1,700 1,940

154855002 45,200 47,900 13,800 15,400 17,100 17,900 18,600 20,600 23,000 24,900

15493000 821 931 419 459 516 556 594 681 764 865

154937001,R 1,150 1,320 618 690 768 822 868 953 1,050 1,200

15511000 233 266 109 120 135 149 163 197 226 260

15514000 1,560 1,770 627 761 953 1,080 1,190 1,370 1,580 1,790

15514500 1,060 1,180 245 303 333 355 380 452 507 538

15515500 52,400 55,400 18,000 19,500 21,600 22,800 24,000 26,500 28,800 30,800

15515800 31.0 38.6 16.6 17.9 20.8 23.3 25.4 28.5 31.9 35.7

15516000 1,850 2,040 624 734 865 991 1,100 1,240 1,360 1,500

15518000 6,700 7,130 1,950 2,330 2,650 2,930 3,150 3,590 4,030 4,370

15518080 29.4 33.0 14.1 16.0 18.0 19.2 20.4 23.1 24.8 28.5

15518350 1,120 1,210 340 385 439 499 530 589 628 692

15535000 5.7 6.7 0.8 1.1 2.5 3.2 3.6 5.0 5.6 6.2

15564600 1,730 2,620 530 598 773 918 1,130 1,610 1,790 2,000

15564800 277,000 292,000 152,000 162,000 175,000 181,000 186,000 200,000 217,000 235,000

15564875 894 1,120 176 226 349 420 465 549 631 770

15564900 17,300 20,500 4,190 6,560 7,990 8,940 9,590 11,500 13,400 15,600

15565200 371,000 409,000 164,000 172,000 19,9000 218,000 242,000 275,000 306,000 326,000

15565447 384,000 391,000 231,000 250,000 272,000 284,000 300,000 323,000 344,000 359,000

15621000 151 175 55.3 74.8 90.7 102 116 145 171 204

15635000 17.4 22.4 5.4 6.4 8.1 11.3 14.4 17.0 20.0 23.0

15668200 64.3 73.4 16.9 18.7 24.6 37 41.5 50.9 60.8 70.5

15712000 573 634 291 320 334 347 380 495 558 700

15743850 38.4 47.5 17.5 19.9 21.2 22.3 23.4 26.2 30.0 39.3

15744000 9,660 11,600 4,670 4,840 5,160 5,760 6,720 9,270 10,600 12,000

15744500 20,100 24,800 8,560 9,070 10,800 12,100 13,200 15,900 17,900 21,400

15747000 1,270 1,580 278 333 426 496 582 783 968 1,150

15896000 418 797 156 190 234 284 360 538 732 985

15896700 1.6 2.1 0.2 0.3 0.5 0.8 1.1 1.7 2.6 4.8

15904900 51.7 61.5 1.0 1.1 1.9 2.9 3.3 5.7 9.3 11.8

15906000 25.5 32.9 2.6 5.5 7.3 9.1 11.8 15.1 18.6 22.5

15908000 2,900 3,320 579 700 825 926 1,020 1,250 1,480 1,660

Table 8. Monthly low-duration flow statistics for July, August, and September for streamflow-gaging stations in Regions 1–7, Alaska and conterminous 

basins in Canada—Continued

Station No. Daily mean discharge, in cubic feet per second

AUG60 AUG50 SEPT98 SEPT95 SEPT90 SEPT85 SEPT80 SEPT70 SEPT60 SEPT50
58 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

Table 9. Seasonal low-duration flow statistics and low-flow frequencies for July-through-September for streamflow-gaging stations in Region 1, Alaska 

and conterminous basins in Canada

[Station No. R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: J-Sn, for the season Julythrough-September having an n-percent exceedance probability; J-SQ7n, for the season July-through-September for the 7-day, n-year low flow. mi2, square 

mile; in., inch; –, no data available]

Station No. Station Name

Latitude Longitude Drainage 

area 

(mi2)

Mean annual 

precipitation 

(in.)

Mean basin 

elevation 

(feet) (degrees, minutes, 

seconds)

15008000 Salmon River near Hyder, AK 56 01 34 130 03 55 94.1 110 3,840

15010000 Davis River near Hyder, AK 55 45 00 130 12 00 80.0 175 3,400

15011500 Red River near Metlakatla, AK 55 08 29 130 31 50 45.3 200 1,700

15012000 Winstanley Creek near Ketchikan, AK 55 24 59 130 52 03 15.5 160 1,730

15015590 Unuk River near Stewart, BC 56 21 05 130 41 30 571 100 3,880

15018000 Shelokum Lake outlet near Bell Island, AK 55 59 00 131 39 00 15.6 165 1,700

15022000 Harding River near Wrangell, AK 56 12 48 131 38 12 67.4 175 2,400

15024750 Goat Creek near Wrangell, AK 56 39 40 131 58 14 17.3 175 2,560

15026000 Cascade Creek near Petersburg, AK 57 00 21 132 46 45 23.0 175 3,160

15028300 Farragut River near Petersburg, AK 57 10 24 133 06 36 151 175 2,540

15030000 Sweetheart Falls Creek near Juneau, AK 57 56 35 133 40 55 36.3 150 2,110

15031000 Long River above Long Lake near Juneau, AK 58 10 56 133 53 06 8.29 175 3,020

15034000R Long River near Juneau, AK 58 10 00 133 41 50 32.5 180 2,400

15036000 Speel River near Juneau, AK 58 12 10 133 36 40 226 175 3,100

15038000R Crater Creek near Juneau, AK 58 08 15 133 46 15 11.4 175 2,590

15039900 Dorothy Lake outlet near Juneau, AK 58 14 56 133 58 54 11.0 160 3,450

15040000 Dorothy Creek near Juneau, AK 58 13 40 134 02 25 15.2 150 3,100

15044000 Carlson Creek near Juneau, AK 58 19 00 134 10 15 24.3 200 2,200

15048000 Sheep Creek near Juneau, AK 58 16 30 134 18 50 4.57 150 1,900

15052000 Lemon Creek near Juneau, AK 58 23 30 134 25 15 12.1 180 3,430

15052500 Mendenhall River near Auke Bay, AK 58 25 47 134 34 22 85.1 180 3,260

15052800 Montana Creek near Auke Bay, AK 58 23 53 134 36 34 14.1 100 1,500

15053800 Lake Creek at Auke Bay, AK 58 23 40 134 37 50 2.50 80 1,170

15056100 Skagway River at Skagway, AK 59 28 02 135 17 00 145 100 3,900

15056200 West Creek near Skagway, AK 59 31 35 135 21 10 43.2 100 3,400

15056560 Klehini River near Klukwan, AK 59 24 47 135 59 49 284 80 3,480

15058000 Purple Lake outlet near Metlakatla, AK 55 06 00 131 26 00 6.67 150 860

15059500 Whipple Creek near Ward Cove, AK 55 26 30 131 47 38 5.29 125 880

15060000 Perseverance Creek near Wacker, AK 55 24 40 131 40 05 2.81 190 1,340

15066000 Beaver Falls Creek near Ketchikan, AK 55 22 55 131 28 25 5.80 190 1,630

15067900 Upper Mahoney Lake outlet near Ketchikan, AK 55 24 50 131 33 16 2.03 200 2,500

15068000 Mahoney Creek near Ketchikan, AK 55 25 34 131 30 40 5.70 200 1,680

15070000R Swan Lake near Ketchikan, AK 55 36 54 131 20 14 36.5 200 1,800

15072000 Fish Creek near Ketchikan, AK 55 23 31 131 11 38 32.1 180 1,300

15074000 Ella Creek near Ketchikan, AK 55 30 20 131 01 25 19.7 175 900

15076000 Manzanita Creek near Ketchikan, AK 55 36 00 130 59 00 33.9 200 1,300

15078000 Grace Creek near Ketchikan, AK 55 39 28 130 58 14 30.2 200 1,500

15080000 Orchard Creek near Bell Island, AK 55 50 00 131 27 00 59.0 150 1,600

15081497 Staney Creek near Klawock, AK 55 48 05 133 06 31 50.6 100 882

15081500 Staney Creek near Craig, AK 55 48 57 133 07 58 51.6 100 850

1Record includes regulated years. Station not included in regression analysis. Frequency statistics not calculated because station violates assumption 

of log-normal distribution of streamflow.
Table 9 59

Table 9. Seasonal low-duration flow statistics and low-flow frequencies for July-through-September for streamflow-gaging stations in Region 1, 

Alaska and conterminous basins in Canada—Continued

Station No.

Daily mean discharge, in cubic feet per second

Seasonal low-duration flow Seasonal low-flow 

frequency statistics

J-S98 J-S95 J-S90 J-S85 J-S80 J-S70 J-S60 J-S50 J-S7Q2 J-S7Q10

15008000 669 885 1,080 1,220 1,360 1,600 1,810 2,010 941 623

15010000 518 701 835 986 1,110 1,310 1,470 1,610 809 451

15011500 81.4 106 141 163 193 260 333 414 138 77.0

15012000 22.8 31.4 43.5 53.9 63.4 85.1 109 129 38.4 20.2

15015590 2,450 3,080 3,760 4,300 4,770 5,700 6,550 7,270 3,360 2,180

15018000 30.6 43.1 53.6 69.3 81.8 107 139 176 46.2 27.8

15022000 338 420 519 593 657 781 907 1,050 481 310

15024750 69.1 84.0 101 118 138 167 196 226 86.7 65.1

15026000 144 177 217 253 282 329 375 419 201 124

15028300 1,020 1,270 1,530 1,700 1,860 2,110 2,300 2,500 1,450 929

15030000 146 213 270 302 325 365 427 467 243 119

15031000 63.1 85.2 112 137 157 186 210 234 106 56.0

15034000R 322 429 529 599 648 725 792 860 467 299

15036000 1,910 2,650 3,340 3,720 4,040 4,610 5,090 5,620 2,900 1,730

15038000R 103 175 225 257 280 328 362 402 189 103

15039900 114 132 155 171 187 203 222 240 143 105

15040000 134 157 185 204 216 234 252 272 171 126

15044000 131 167 210 246 279 363 442 524 201 119

15048000 21.6 26.4 33.3 37.8 41.6 50.0 57.6 65.5 30.9 19.6

15052000 119 165 208 241 269 308 342 376 180 100

15052500 954 1,260 1,600 1,830 2,020 2,310 2,570 2,820 1,430 773

15052800 36.7 46.8 62.5 72.0 80.1 95.6 111 127 57.8 31.5

15053800 0.1 0.4 0.7 1.3 1.8 3.2 5.0 7.5 0.50 0.13

15056100 225 316 419 526 637 809 973 1,160 378 210

15056200 224 276 370 466 535 650 751 838 322 193

15056560 764 904 1,160 1,420 1,640 2,220 2,680 3,090 1,050 686

15058000 4.7 7.5 11.0 14.7 17.3 24.3 32.4 42.8 9.7 3.8

15059500 2.4 3.6 4.8 5.5 6.2 8.0 10.3 13.2 4.5 2.1

15060000 0.7 1.4 2.5 3.4 4.4 6.8 9.9 14.6 1.9 0.71

15066000 7.0 14.2 18.6 23.2 27.8 36.5 52.5 64.6 16.7 6.4

15067900 5.7 7.2 10.4 13.6 16.4 22.3 28.3 37.1 8.0 4.8

15068000 14.6 21.2 29.8 36.1 42.0 55.1 67.9 82.8 28.6 12.3

15070000R 85.6 110 136 158 180 227 288 356 124 75.7

15072000 48.9 68.4 89.9 110 128 167 212 266 84.9 42.6

15074000 22.2 33.6 47.1 57.7 70.1 94.7 113 138 39.1 17.1

15076000 110 140 174 200 224 268 312 362 181 104

15078000 36.3 57.1 90.3 116 137 181 232 283 86.7 38.0

15080000 73.9 102 136 161 183 237 298 366 125 67.1

15081497 9.3 14.6 20.9 26.5 32.2 42.9 58.4 82.9 23.8 9.5

15081500 15.6 23.0 32.3 39.1 46.5 62.3 76.3 93.1 35.0 16.5
60 Estimating High-Flow and Low-Flow Statistics for Ungaged Sites on Streams in Alaska and Conterminous Basins in Canada

15081580 Black Bear Lake outlet near Klawock, AK 55 33 25 132 52 33 1.82 100 2,300

15083500 Perkins Creek near Metlakatla, AK 54 56 48 132 10 15 3.38 150 730

15085100 Old Tom Creek near Kasaan, AK 55 23 44 132 24 25 5.90 100 1,000

15085600 Indian Creek near Hollis, AK 55 26 58 132 41 41 8.82 100 1,000

15085700 Harris River near Hollis, AK 55 27 47 132 42 11 28.7 120 1,400

15085800 Maybeso Creek at Hollis, AK 55 29 26 132 40 31 15.1 120 1,120

15086600 Big Creek near Point Baker, AK 56 07 54 133 08 56 11.2 110 680

15087545 Municipal Watershed Creek near Petersburg, AK 56 46 40 132 55 07 2.20 100 1,400

15087570 Hamilton Creek near Kake, AK 56 52 21 133 40 30 65.0 70 493

15087590 Rocky Pass Creek near Point Baker, AK 56 37 10 133 44 10 2.72 100 358

15087690 Indian River near Sitka, AK 57 04 01 135 17 42 10.1 140 1,340

15090000R Green Lake near Sitka, AK 56 59 14 135 06 37 28.8 160 2,100

15093400 Sashin Creek near Big Port Walter, AK 56 22 32 134 39 40 3.72 300 1,130

15094000 Deer Lake outlet near Port Alexander, AK 56 31 10 134 40 10 7.41 300 1,300

15098000 Baranof River at Baranof, AK 57 05 15 134 50 30 32.0 180 2,000

15100000 Takatz Creek near Baranof, AK 57 08 35 134 51 50 17.5 180 2,300

151014901,R Greens Creek at Greens Creek Mine near Juneau, AK 58 05 00 134 37 54 8.62 98 2,450

15101500 Greens Creek near Juneau, AK 58 05 18 134 44 49 22.8 80 1,880

15102000 Hasselborg Creek near Angoon, AK 57 39 40 134 14 55 56.2 100 1,200

15106920 Kadashan River above Hook Creek near Tenakee, AK 57 39 46 135 11 06 10.2 100 1,020

15106940 Hook Creek above tributary near Tenakee, AK 57 40 39 135 07 42 4.48 100 1,260

15106960 Hook Creek near Tenakee, AK 57 40 22 135 10 40 8.00 100 1,160

15106980 Tonalite Creek near Tenakee, AK 57 40 42 135 13 17 14.5 100 950

15107000 Kadashan River near Tenakee, AK 57 41 43 135 12 59 37.7 100 970

15108000 Pavlof River near Tenakee, AK 57 50 30 135 02 09 24.3 100 920

15109000 Fish Creek near Auke Bay, AK 58 19 50 134 35 20 13.6 80 1,600

1Record includes regulated years. Station not included in regression analysis. Frequency statistics not calculated because station violates assumption 

of log-normal distribution of streamflow.

Table 9. Seasonal low-duration flow statistics and low-flow frequencies for July-through-September for streamflow-gaging stations in Region 1, Alaska 

and conterminous basins in Canada—Continued

[Station No. R, presently regulated. Station name: AK, Alaska; BC, British Columbia; YT, Yukon. Daily mean discharge: J-Sn, for the season Julythrough-September having an n-percent exceedance probability; J-SQ7n, for the season July-through-September for the 7-day, n-year low flow. mi2, square 

mile; in., inch; –, no data available]

Station No. Station Name

Latitude Longitude Drainage 

area 

(mi2)

Mean annual 

precipitation 

(in.)

Mean basin 

elevation 

(feet) (degrees, minutes, 

seconds)
Table 9 61

15081580 4.7 6.0 7.7 9.3 11.3 14.4 17.1 20.7 7.7 3.6

15083500 1.2 1.5 1.9 2.3 2.6 3.4 4.6 6.4 1.9 1.0

15085100 2.0 2.6 3.7 4.7 5.5 7.0 8.7 11.1 4.4 2.0

15085600 2.3 3.0 4.5 5.5 6.5 9.9 14.5 21.5 4.0 2.1

15085700 21.9 29.1 39.2 47.1 52.8 64.2 79 99.9 33.9 18.7

15085800 12.7 15.8 20.1 23.7 27.3 34.4 43.2 53.5 18.9 11.3

15086600 4.5 7.3 10.6 13.0 15.5 20.7 27.9 36.9 11.2 5.01

15087545 0.8 1.2 1.9 2.5 3.2 4.3 5.6 7.1 2.1 0.81

15087570 9.1 13.4 19.9 26.4 32.4 45.3 62.1 83.3 21.3 7.7

15087590 0.1 0.2 0.5 0.6 0.8 1.2 1.8 2.6 0.5 0.11

15087690 17.7 22.4 30.6 35.0 38.6 46.6 54.8 63.3 34.0 20.0

15090000R 144 189 245 275 310 372 403 435 222 146

15093400 6.8 10.5 15.1 18.3 21.8 29.5 36.6 46.4 14.3 6.1

15094000 41.4 55.8 71.4 84.2 97.8 115 131 147 92.0 44.1

15098000 220 283 333 375 412 474 529 591 311 193

15100000 163 197 237 259 275 315 353 393 218 171

151014901,R 20.5 12.1 14.5 17.5 21.5 24.6 27.9 32.7 – –

15101500 21.6 33.6 42.7 48.6 54.5 69.1 81.1 92.7 44.0 18.9

15102000 75.3 88.3 118 142 160 205 242 281 126 72.8

15106920 5.9 7.5 9.4 11.7 13.6 17.2 21.1 26.3 10.8 5.6

15106940 2.6 3.1 4.0 5.4 6.5 8.2 10.6 13.6 4.9 2.4

15106960 5.2 5.9 7.2 8.8 10.7 13.7 16.9 20.3 8.4 5.9

15106980 9.7 14.3 17.8 21.1 24.1 29.1 34.6 41.4 19.1 10.4

15107000 28.6 31.9 39.0 46.6 53.0 66.2 82.7 105 42.6 26.8

15108000 24.4 31.3 38.6 45.1 51.0 62.7 75.0 90.0 36.5 21.1

15109000 11.5 16.8 22.8 27.8 31.7 39.8 49.2 60.8 20.9 11.0

Table 9. Seasonal low-duration flow statistics and low-flow frequencies for July-through-September for streamflow-gaging stations in Region 1, 

Alaska and conterminous basins in Canada—Continued

Station No.

Daily mean discharge, in cubic feet per second

Seasonal low-duration flow Seasonal low-flow 

frequency statistics

J-S98 J-S95 J-S90 J-S85 J-S80 J-S70 J-S60 J-S50 J-S7Q2 J-S7Q10
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