USGS Water-Year Summary 2021
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.
- WSP 1564: 1931. WDR CA-00-1: 1982 (instantaneous maximum discharge).
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.
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.