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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
10263000 Mojave River at Afton, CA
LOCATION - Lat 35°02'14", long 116°23'00" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.18, T.11 N., R.6 E., San Bernardino County, CA, Hydrologic Unit 18090208, on right bank side of right pier of Union Pacific Railroad bridge, 0.3 mi west of Afton, and 63 mi east of Barstow.
DRAINAGE AREA - 2,121 mi².
REVISIONS HISTORY - WSP 1564: 1931. WDR CA-00-1: 1982 (instantaneous maximum discharge).
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1929 to September 1932, October 1952 to current year. Records for water year 1930 are incomplete; yearly estimate published in WSP 1314. Records for water years 1979 and 1980 are incomplete; discharge measurements only were published at that time.
GAGE - Water-stage recorder. Datum of gage is 1,400.90 ft above NAVD of 1988. Dec. 21, 1929, to Sept. 30, 1932, at site 1.7 mi downstream at different datum; October 1952 to May 1978, at datum 2 ft higher.
REMARKS - Natural flow affected by ground-water withdrawals, diversions, municipal use, and storage in reservoirs 100 mi upstream. For description of upstream reservoirs see "Mojave River at Barstow" (station 10262500). See schematic diagram of Mojave River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 18,000 ft³/s, Jan. 26, 1969, gage height, 10.40 ft, datum then in use, from rating curve extended above 3,200 ft³/s, on basis of slope-area measurement of peak flow; no flow at times during many years.
