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Water-Year Summary for Site 06038500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  

Water year 2024: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2024
06038500 MADISON RIVER BELOW HEBGEN LAKE, NEAR GRAYLING, MT
LOCATION - Lat 44°51'59.01", long 111°20'19.61" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 NE 1/4 sec.22, T.11 S., R.3 E., Gallatin County, MT, Hydrologic Unit 10020007, Gallatin National Forest, on right bank 1,500 ft downstream from Hebgen Dam, 8 mi northwest of Grayling, 17 mi upstream from West Fork, and at river mile 108.8.
DRAINAGE AREA - 931 mi².
REVISIONS HISTORY - WSP 1509: 1948. WSP 1559: Drainage area. WSP 1629: 1943. WSP 1709: 1959. WSP 1729: 1943. WDR MT-2013: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1909 to current year. Prior to October 1938 adjusted runoff only, published in Water Supply Paper (WSP) 1309. Prior to October 1949, published as "below Hebgen Reservoir".
GAGE - Water-stage recorder. Elevation of gage is 6,448.47 ft (after 1959 earthquake) referenced to the National Geodetic Vertical Datum of 1929. Prior to July 13, 1943, nonrecording gage in stilling well. Bureau of Reclamation satellite telemeter is located at the station.
REMARKS - Flow is completely regulated by Hebgen Lake (station number 06038000). Diversions for irrigation occur upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 10,200 ft³/s, Aug. 17, 1959, caused by wave over Hebgen Dam during earthquake, gage height, 5.3 ft, from floodmark, from rating curve extended above 3,500 ft³/s on basis of slope-area measurement of peak flow; maximum observed unaffected by wave over dam, 5,090 ft³/s, June 3, 1943, gage height, 3.69 ft; minimum daily, 5.0 ft³/s, May 9-12, 1960.
WATER-QUALITY RECORDS
PERIOD OF RECORD - WATER TEMPERATURE: Water years 1986-88, 1990-95, October 2003 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: July 2009 to current year.
INSTRUMENTATION - Water temperature probe installed June 25, 2009.
REMARKS - 
 
EXTREMES FOR PERIOD OF DAILY RECORD - 
WATER TEMPERATURE: Maximum, 22.3°C, July 20, 2017; minimum, 1.0°C, Nov. 27, 2010.