USGS Water-Year Summary for Site 06670500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

06670500 LARAMIE RIVER NEAR FORT LARAMIE, WY

LOCATION - Lat 42°12'02", long 104°32'16" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 NE 1/4 sec.28, T.26 N., R.64 W., Goshen County, WY, Hydrologic Unit 10180011, on right bank 600 ft upstream from bridge on county road, 0.6 mi upstream from mouth, and 1.1 mi southwest of Fort Laramie.

DRAINAGE AREA - 4,564 mi² of which 631 mi² probably is noncontributing.

REVISIONS HISTORY - WSP 1918: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1915 to current year (no winter records prior to 1927). Monthly discharge only for some periods, published in WSP 1310. Records for water years 1926-39, previously published including diversions to Gering-Fort Laramie Canal, were adjusted to exclude flow in the canal in WSP 1310. Prior to October 1931, published as "at Fort Laramie". No diversion to Gering-Fort Laramie Canal since 1956.

GAGE - Water-stage recorder. Elevation of gage is 4,220 ft above NGVD of 1929, from topographic map. April 4, 1915 to March 31, 1925, nonrecording gage at site 0.1 mi downstream from station at different datum. April 1, 1925 to September 30, 1932, nonrecording gage and October 1, 1932 to August 20, 1935, water-stage recorder at site 4.3 mi upstream from station at different datum. August 21, 1935, to November 2, 1970, water-stage recorder at site 0.3 mi upstream from station at different datum. November 3, 1970 to May 9, 1973, water-stage recorder 0.1 mi downstream from station at different datum. May 10, 1973 to April 5, 1977, water-stage recorder 4.3 mi upstream from station at different datum. U.S. Army Corps of Engineers data collection platform with satellite telemetry at station.

COOPERATION -

10-15-2018 to 10-08-2019: Nine discharge measurements provided by the Wyoming State Engineer's Office.
11-03-2017 to 10-14-2018: Thirteen discharge measurements provided by the Wyoming State Engineer's Office.
10-01-2016 to 11-02-2017: Eleven discharge measurements provided by the Wyoming State Engineer's Office.
10-01-2015 to 09-30-2016: Fourteen discharge measurements provided by the Wyoming State Engineer's Office.

REMARKS - Major regulation began after completion of Grayrocks Reservoir in 1980. Diversion, at times, to Gering-Fort Laramie Canal, 5.4 mi upstream. Natural flow of stream affected by transbasin diversions,

EXTREMES FOR PERIOD OF RECORD - Minimum daily discharge, 2.0 ft³/s, Jan. 23, 1981, no flow Jan. 31 to Mar. 20, Oct. 24 to Dec. 17, 1926, Mar. 1-26, Apr. 14, 1938, all flows diverted to Gering-Fort Laramie Canal.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

October 1965 to June 1988, October 2003 to May 2014, March 2018 to November 2018.

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: March to November 2015, March to November 2018.
pH: March to November 2015, March to November 2018.
WATER TEMPERATURE: March to November 2015, March to November 2018.
DISSOLVED OXYGEN: March to November 2015, March to November 2018.

INSTRUMENTATION - Water-quality monitors for specific conductance, pH, water temperature, and dissolved oxygen.

REMARKS -

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE:  Maximum recorded, 770 uS/cm, Jun. 8, 2018; minimum recorded, 369 uS/cm, 
May 29, 2015.

pH:  Maximum recorded, 8.7 units, Aug. 21-24 and Oct. 29 to Nov. 1, 2015; minimum recorded, 7.6 units,
July 8 to 13, 2018.

WATER TEMPERATURE:  Maximum recorded, 27.5°C, July 1, 2015; minimum recorded, 2.2°C, Apr. 1, 2018.

DISSOLVED OXYGEN:  Maximum recorded, 13.5 mg/L, May 30, 2018; minimum recorded, 4.6 mg/L, 
July 8 and 10, 2018.