USGS Water-Year Summary 2021
11051502 Santa Ana River Supplementary Gage near Mentone, CA
LOCATION - Lat 34°06'30", long 117°05'59" referenced to North American Datum of 1927, San Bernardino County, CA, Hydrologic Unit 18070203, in SW 1/4 SW 1/4 sec. 4, T.1 S., R.2 W., on right bank of bulldozed diversion channel (below northeast canyon wall opposite main river gage, station 11051499).
DRAINAGE AREA - Not applicable.
PERIOD OF RECORD - July 1896 to current year. Prior to October 1914, records for river only not equivalent owing to Greenspot pipeline diversion between sites and exclusion of discharge from Warm Springs Canyon
GAGE - Water-stage recorder and concrete control. Datum of gage is 1,956.14 ft above NAVD of 1988.
COOPERATION - Gage is funded in cooperation with the Western San Bernardino Water District administered by San Bernardino Municipal Water District as part of the Santa Ana River Watermaster requirements.