National Stream Water Quality Accounting Network (NASQAN)

03216600

Ohio River at Greenup Dam near Greenup, KY

Louisville, KY

 38°38'48"

82°51'38"

05090103

at left bank at downstream end of lock guidewall in lower poolat Greenup locks, 1.1 mile upstream from Grays Branch, 4.7 mi downstream from Little Sandy River, 5.0 mi north of Greenup and at mile 341.5

62,000 sq. mi., approx.

03303280

Ohio River at Cannelton Dam at Cannelton, IN

Louisville, KY

 37°53'58"

86°42'20"

05140201

at Cannelton Dam, 0.7 mi upstream from Indian Creek, 3.3 mi upstream from Lead Creek, and at mile 720.8. Water-quality samples are collected 2.0 mi upstream from dischage station.

97,000 sq. mi., approximately

03378500

Wabash River at New Harmony, IN

Paducah, KY

 38°07'55"

87°56'25"

05120113

at bridge on U.S. Highway 66 at New Harmony and at mile 51.5

29,234 sq. mi.

Water discharge obtained from station Wabash River at Mount Carmel, IL (03377500)

03609750

Tennessee River at Highway 60 near Paducah, KY

Paducah, KY

37°02'16"

88°31'46"

06040006

at auxiliary gaging station at bridge on U.S. Highway 60, 16.3 mi downstream from gagin station, 2.4 mi east of Paducah, and at mile 5.3

40,330 sq. mi., 40,200 sq. mi. at gage

Records of daily discharge are taken from gaging station near Paducah (03609500). Flow completely regulated. Barkley-Kentucky Canal (03438190) diverts water from and to Lake Barkley in the Cumberland River Basin.

03612500

Ohio River at Dam 53 near Grand Chain, IL

Paducah, KY

 37°12'11"

89°02'30"

05140206

at auxiliary gaging station, 0.5 mi upstream from Gar Creek, 3.0 mi southwest of Grand Chain, 18.1 mi downstream from gaging station at Metropolis, and at mile 962.2

203,100 sq. mi., approx.

Water discharge obtained from Ohio River at Metropolis, IL (03611500). Flow regulated by many dams and reservoirs.

05420500

Mississippi River at Clinton, IA

Iowa City, IA

 41°46'50"

90°15'07"

07080101

at river end of 3rd St., at downstream end of ADM repair dock, 10.3 miles upstream from Wapsipinicon River, 4.8 miles upstream from Camanche gage, 5.9 miles downstream from Lock and Dam 13, and at mile 516.6 upstream from Ohio River. Water-quality samples collected at Fulton-Lyons Bridge, 6.4 miles upstream of discharge station.

85,600 sq.mi., approx., at Fulton-Lyons Bridge in Clinton

05587455

Mississippi River below Grafton, IL

Rolla, MO

 38°58'05"

90°25'42"

07110009

on left bank 0.2 mi downstream from the mouth of the Illinois River, 15.3 mi above Lock and Dam 26, 23.0 mi above mouth of Missouri River and at mile 218.6 upstream of the mouth of the Ohio River. Water-quality samples collected 4 miles downstream of discharge station.

171,300 sq. mi., approximately

06185500

Missouri River near Culbertson, MT

Fort Peck, MT

 48°07'30"

104°28'20"

10060005

on right bank at upstream side of bridge on State Highway 16, 2.5 mi southeast of Culbertson, 10 mi downstream from Big Muddy Creek and at river mile 1,620.76

91,557 sq. mi.

06329500

Yellowstone River near Sidney, MT

Fort Peck, MT

47°40'42"

104°09'22"

10100004

on left bank at Montana-Dakota Utilities Company powerplant, 0.2 mi downstream from bridge on State Highway 23, 2.5 mi south of Sidney, 3.0 mi downstream from Fox Creek, and at river mile 29.2

 69,103 sq. mi..

06338490

Missouri River at Garrison Dam, ND

Bismark,ND

 47°30'08"

101°25'50"

10130101

in control structure of Garrison Dam, 2.5 mi west of Riverdale, 14 mi upstream from Knife River, and at mile 1,389.9.

181,400 sq.mi., approximately

06440000

Missouri River at Pierre SD

Pierre, SD

 44°22'23"

100°22'03"

10140101

on left bank downstream from Dakota Minnesota and Eastern Railroad bridge, 1.3 mi upstream fromBad River, 5.8 mi downstream from Oahe Dam, and at mile 1066.5. Water-quality samples collected 0.25 mile below Oahe Dam, about 5.55 mile upstream from gaging station. Inflow between these two locations generally are negligible.

 243,500 sq. mi., approximately

06610000

Missouri River at Omaha, NE

Council Bluffs, IA

 41°15'32"

95°55'20"

10230006

on right bank on left side of concrete floodwall, at foot of Douglas Street, 275 ft downstream of Interstate 480 Highway bridge in Omaha and at mile 615.9. Water-quality samples are collected at Interstate-80 bridge, 2.0 miles downstream of gaging station.

322,800 sq. mi. approximately. The 3,959 sq.mi. in the Great Divide basin are not included.

 Flow regulated by upstream mainstem reservoirs. US Army Corps of Engineers raingage and satellite data collection platform at station.

06805500

Platte River at Louisville, NE

Lincoln, NE

41°00'55"

96°09'28"

10200202

on the left bank at the upstream side of bridge on Nebraska Highway 50, 1 mi north of Louisville, and at mile 16.5

85,370 sq. mi., appox., of which about 71,000 sq.mi. contributes directly to surface runoff

06934500

Missouri River at Hermann, MO

Rolla, MO

 38°42'36"

91°26'21"

10300300

on downstream side of third pier from right abutment of bridge on State Highway 19 at Hermann, and at mile 97.9.

524,200 sq. mi., approximately

07022000

Mississippi River at Thebes, IL

Rolla, MO

 37°13'00"

89°27'50"

07140105

near center span on downstream side of railroad bridge at Thebes, 5.0 mi downstream from Headwater Diversion Channel and at mile 43.7 above Ohio River.

 713,200 sq. mi., approximately

07263620

Arkansas River at David D. Terry Lock & Dam below Little Rock, AR

Little Rock, AR

34°40'07"

92°09'18"

11110207

at upper end of upstream wall at David D. Terry Lock and Dam, 10.7 mi downstream from Main Street bridge at Little Rock, and at mile 124.2.

158,288 sq. mi., of which 22,241 sq. mi. is probably non-contributing

Discharge is from station 07263450, 16.8 mi. upstream

07373420

Mississippi River near St. Francisville, LA (schematic map of lower Mississippi)

Baton Rouge, LA

30°45'30"

91°23'45"

08070100

at State Highway 10 ferry crossing, 2.0 mi southwest of St. Francisville and at mile 266.0

1,125,300 sq.mi. contributing

Discharge is from Mississippi River at Tarbert Landing, MS, station 07295100

07381495

Atchafalaya River at Melville, LA (schematic map of lower Mississippi)

Baton Rouge, LA

 30°41'26"

91°44'10"

08080101

at bridge on Texas and Pacific Railroad in Melville

93,316 sq. mi.

Discharge is from station 07381490, Atachafalaya River at Simmesport, LA

08364000

Rio Grande at El Paso, TX*

Albuquerque, NM

 31°48'10"

106°32'25"

13030102

at gaging stati on the downstream side of the Courchesne Bridge, 5.6 mi upstream from the Santa Fe Street-Juarez Avenue bridge betwen El Paso, Tx, and Cd. Juarez, Chihuahua at mile 1,249 and 1.7 mi upstream from the American Dam

29,267 sq.mi.

 Discharge measured by International Boundary and Water Commission

08377200

Rio Grande at Foster Ranch, near Langtry, TX

San Angelo, TX

29°46'50"

101°45'20"

13040212

at gaging station 0.1 mi downstream from Terrell-Val Verde County line, 16.9 mi from Langtry, and 597.2 mi downstream fromthe American Dam at El Paso

 80,742 sq.mi.

Discharge measured by International Boundary and Water Commission

08447410

Pecos River near Langtry, TX

San Angelo, TX

 29°48'10"

101°26'45"

13040212

at gaging station 7.4 mi east of Langtry and 15.0 mi upstream from confluence with Rio Grande

35,179 sq. mi.

Discharge measured by International Boundary and Water Commission

08450900

Rio Grande below Amistad Dam near Del Rio, TX

San Angelo, TX

29°25'30"

101°02'27"

13080001

2.2 mi downstream from Amistad Dam and 10 mi northwest of Del Rio

123,143 sq. mi.

Discharge measured by International Boundary and Water Commission

08459200

Rio Grande at Pipeline Crossing below Laredo TX

San Antonio, TX

 27°24'01"

99°29'18"

13080002

8.7 Mi (14.0 km) downstream from Texas-Mexican Railway Bridge near Laredo, and at mile 352.69 (567.48 km)

132,578

Discharge measured by International Boundary and Water Commission

08461300

Rio Grande below Falcon Dam, TX

San Antonio, TX

99°10'05"

13090001

U.S. tailrace at Falcon Dam

159,270 sq.mi.

Discharge measured by International Boundary and Water Commission

08470400

Arroyo Colorado at Harlingen, TX

map of lower basin

San Antonio, TX

26°10'24"

97°42'01"

13090002

on downstream side of northbound service road on U.S.Highways 83&77, about 18 mi from point of main floodway that divides into North Floodway and Arroyo Colorado

182 sq. mi.

Discharge measured by International Boundary and Water Commission

08475000

Rio Grande near Brownsville, TX

map of lower basin

San Antonio, TX

25°52'35"

97°27'15"

13090002

at International Boundary and Water Commission gaging station, 1000 ft downstream from El Jardin pumping plant, 6.8 mi below International Bridge between Brownsville and Matamoras, Tamps., Mex. and 48.8 miles above the Gulf of Mexico

176,333 sq. mi.

Discharge measured by International Boundary and Water Commission

09180500

Colorado River near Cisco, UT

Moab, UT

38°48'38"

109°17'34"

14030005

on left bank 1 mi downstream from Dolores River, 11 mi south of Cisco, 36 mi downstream from Colorado-Utah state line, 97 mi upstream from Green River and 235 mi upstream from San Juan River, at mile 1022.3 from Arizona-Sonora

09315000

Green River at Green River, UT

Moab, UT

38°59'10"

110°09'02"

14060008

on right bank, 1,400 ft upstream from railroad bridge, 0.9 mi southeast of town of Green River, 22.7 mi upstream from San Rafael River, at mile 117.6 upstream from mouth

44,850 sq. mi. of which about 4,260 sq. mi. (including 3,959 sq. mi. in Great Divide Basin in southern Wyoming) is noncontributing

Flow regulated by Flaming Gorge Reservoir (09234400)

09379500

San Juan River near Bluff, UT

Moab, UT

37°08'49"

109°51'52"

14080205

on left bank, 1,600 ft downstream from Gypsum Creek, 1,800 ft upstream from highway bridge, 20 mi southwest of Bluff, at mile 113.5.

23,000 sq. mi., approximately

No diversions between station and mouth of river. Flow regulated by Navajo Reservoir, NM (09355100)

09380000

Colorado River at Lees Ferry, AZ

Flagstaff, AZ

 36°51'53"

111°35'15"

14070006

in Navajo Indian Reservation, on left bank at head of Marble Gorge at Lees Ferry, just upstream from Paria River, 16 mi downstream of Glen Canyon Dam, 28 mi downstream from UT-AZ state line, and 61.5 mi upstream from Little Colorado River

111,800 sq. mi., approx., including 3,959 sq. mi. in Great Divide basin in southern Wyoming, which is noontributing

 Many diversions above Lake Powell for irrigation, municipal, and industrial use. No diversions or inflow between Lake Powell and the gage.

09404200

Colorado River above Diamond Creek near Peach Springs, AZ

Flagstaff, AZ

 36°46'25"

113°21'46"

15010002

in Lake Mead NRA, on the right bank, 0.6 mi upstream from Diamond Creek, 138 mi downstream from Phantom Ranch, 25 mi north of Peach Springs, 242 mi downstream from Glen Canyon Dam, and 130 mi upstream from Hoover Dam

149,316 sq.mi., including 3,959 sq.mi. in Great Divide Basin in southern Wyoming nand 697 sq.mi. on the Colorado Plateau

Several unregulated tributaries below Glen Canyon Dam.

09421500

Colorado River below Hoover Dam, AZ-NV

Las Vegas, NV

 36°00'55"

114°44'16"

15030101

in powerhouse at downstream side of Hoover Dam. Water-quality samples collected at gaging station 0.3 mi downstream from Hoover Dam.

171,700 sq.mi., approximately, included 3,959 sq.mi. in Great Divide Basin in southern Wyoming, which is non-contributing

09429490

Colorado River above Imperial Dam, CA-AZ

schematic map of Lower Colorado River

Yuma, AZ

 32°52'59"

114°27'55"

15030104

Imperial Dam is 5 mi upstream from Laguna Dam, 15 mi northeast of Yuma, 90 mi downstream from Palo Verde Dam and 147 mi downstream from Parker Dam.Water-quality samples collected below trash racks at All-American Canal headworks at west end of Imperial Dam

188,500 sq. mi., approx., including 3,959 sq. mi. in Great Divide basin in sourthern Wyoming, which is non-contributing

Records show flow of Colorado River reaching Imperial Dam and are synthesized from records of several other stations.

09522000

Colorado River at Northerly International Boundary (NIB), above Morelos Dam, near Andrade, CA

schematic map of Lower Colorado River

Yuma, AZ

 32°43'07"

114°43'05"

15030108

on left bank at northerly international boundary, 0.5 mi east of Andrade. 1.1 mi upstream from Morelos Dam, 1.1 mi downstream from Rockwood Gate, and 6.4 mi downstream from gaging station on Colorado River below Yuma Main Canal wasteway.

246,700 sq. mi., approximately, including all closed basins entirely within the drainage boundary, also 3,959 sq. mi. in Great Divide basin in sourthern Wyoming, which is non-contributing

12400520

Columbia River at Northport, WA

Spokane, WA

 48°55'08"

117°47'11"

17020001

0.4 mi downstream from State Highway 25 bridge at Northport, 10.3 mi downstream from gaging station at boundary, and at mile 735.1

60,200 sq. mi., approximately

Discharge is routed from gaging station at international boundary (12399500)

12472900

Columbia River at Vernita Bridge, near Priest Rapids Dam WA

Pasco, WA

46°38'34"

119°43'54"

17020016

at State Highway 24 Vernita Bridge crossing, 9.0 mi downstream from Priest Rapids Dam and at mile 388.1

96,000 sq. mi., approximately

Discharge determined by routing flows from the gaging station below Priest Rapids Dam (12472800) 6.4 mi upstream

13353200

Snake River at Burbank, WA

Pasco, WA

46°15'00"

118°53'45"

17060110

approximately 1.0 mi downstream from Ice Harbor Dam

108,800 sq. mi.

Discharge is obtained and routed from Ice Harbor Dam, 1.0 mi upstream

14128910

Columbia River at Warrendale, OR

Portland, OR

 45°36'45"

122°01'35"

17080001

on left bank 0.1 mi downstream from Tumult Creek, 1.0 mi west of Warrendale, 5.1 mi downstream from Bonneville Dam, and at mile 141.0

240,000 sq. mi., approximately

Stream discharge taken from Columbia River at the Dalles, OR (14105700) at river mile 188.9

14211720

Willamette River at Portland, OR*

Portland, OR

 45°31'07"

122°40'00"

17090012

in pier at east end of drawspan, on upstream side of Morrison Bridge in Portland, and at mile 12.8

11,100 sq.mi., approximately

Water discharge records obtained by flow routing procedures usg sta records.

14246900

Columbia River at Beaver Army Terminal, near Quincy, OR

Portland, OR

46°10'55"

123°10'50"

17080003

on left bank, 0.7 mi downstream from Crims Island, 3.0 mi northwest of Qunicy, and at mile 53.8

256,900 sq. mi., approximately