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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
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USGS Water-Year Summary 2024
11517000 Shasta River near Montague, CA
LOCATION - Lat 41°42'33", long 122°32'13" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.33, T.45 N., R.6 W., Siskiyou County, CA, Hydrologic Unit 18010207, on right bank, 1.0 mi below Little Shasta River, 2.2 mi southeast of Montague, and 17 mi downstream from Lake Shastina.
DRAINAGE AREA - 673 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1911 to September 1913, September 1916 to June 1922, April 1923 to September 1933, October 2001 to current year.
CHEMICAL DATA: Water years 2002-03 (seasonal records only).
DISSOLVED OXYGEN: Water year 2002-04 (seasonal records only).
pH: Water years 2002-04 (seasonal records only).
SPECIFIC CONDUCTANCE: Water years 2002-04 (seasonal records only).
WATER TEMPERATURE: Water years 2002-08 (daily).
GAGE -
Water-stage recorder, crest-stage gage, and concrete control. Elevation of gage is 2,458 ft above NGVD of 1929, from topographic map. Gage was temporarily relocated approximately 40 ft downstream during the period of Jul. 6, 2021 to Dec. 8, 2021, due to modification of the weir.
REMARKS - Low flow completely regulated by Lake Shastina (formerly Lake Dwinnell) beginning in 1928; storage limited to 50,000 acre-ft. Many diversions upstream from station for irrigation. See schematic diagram of Klamath River and Trinity River Basins available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 5,700 ft³/s, Feb. 11, 1925, gage height, 14.9 ft, site and datum then in use; minimum daily, 0.10 ft³/s, Apr. 7, 8, 1918.
