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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
06012500 RED ROCK RIVER BELOW LIMA RESERVOIR, NEAR MONIDA, MT
LOCATION - Lat 44°39'21.17", long 112°22'16.40" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 SE 1/4 sec.31, T.13 S., R.6 W., Beaverhead County, MT, Hydrologic Unit 10020001, on right bank just downstream from Lima Reservoir, 7 mi northwest of Monida, and at river mile 2,542.1.
DRAINAGE AREA - 566 mi².
REVISIONS HISTORY -
WSP 1309: 1935. WSP 1389: 1912, 1934. WSP 1559: Drainage area.
The WY2015 peak stage was revised on 11/8/24 following a re-examination of the record.
SURFACE-WATER RECORDS
PERIOD OF RECORD - January 1911 to December 1918, April 1919, May 1925 to October 1933, April 1934 to September 1935, May 1936 to October 1938, May 1939 to September 1969, seasonal records only June 1974 to September 1982 and April 1985 to current year. Monthly discharge only for some periods, published in Water Supply Paper (WSP) 1309. Prior to October 1950, published as "below Red Rock Reservoir".
GAGE - Water-stage recorder and sharp-crested weir. Elevation of gage is 6,530 ft, referenced to the National Geodetic Vertical Datum of 1929, estimated from spillway elevation based on Montana Department of Natural Resources and Conservation elevation. Prior to Oct. 1, 1978, at elevation 1.00 ft higher. See WSP 1709 for history of nonrecording gage changes prior to May 8, 1939.
REMARKS - Flow is regulated by Lima Reservoir (station number 06012000). No storage during 1934. Diversions for
irrigation occur upstream from reservoir.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of May 1984 reached a discharge of 1,500 ft³/s, gage height, 5.15 ft, from floodmarks.
