10260820 WEST FORK MOJAVE RIVER BELOW SILVERWOOD LAKE, NEAR HESPERIA, CA
LOCATION.-Lat 34°18'15", long 117°19'06", in SW 1/4 NE 1/4 sec.32, T.3 N., R.4 W., San Bernardino County, Hydrologic Unit 18090208,
San Bernardino National Forest, in control room under spillway, at Cedar Springs Dam, and 8.7 mi south of Hesperia.
DRAINAGE AREA.-34.0 mi2.
PERIOD OF RECORD.-October 1980 to September 1983 and October 1995 to current year. Unpublished records for water years 1973-95
available in files of the California Department of Water Resources.
GAGE.-Flow-meter on release valve and theoretical rating on two slide gates. Elevation of gage is 3,180 ft above sea level, from topographic map.
Prior to October 1983, at site 0.3 mi downstream, at different datum.
REMARKS.-Flow regulated by Silverwood Lake (station 10260790). Lake stores water received from the California Aqueduct through Mojave
Siphon Powerplant (station 10260780) until it is transferred to San Bernardino area through Devil Canyon Powerplant (station 11063682). Las
Flores Release from Aqueduct (station 10260822) delivers water to vicinity of West Fork Mojave River. See schematic diagram of Mojave
River Basin.
COOPERATION.-Records collected by California Department of Water Resources, under general supervision of the U.S. Geological Survey, in
connection with a Federal Energy Regulatory Commission project.
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 2,290 ft3/s, Mar. 2, 1983, gage height, 7.51 ft, site and datum then in use; no
flow for most of every year.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 .00 .00 .00 .00 .00 23 .00 .00 .00 .00 24 .00
2 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00
3 .00 .00 .00 127 54 .00 .00 .00 .00 .00 .00 .00
4 .00 .00 .00 239 105 .00 .00 .00 .00 .00 48 .00
5 .00 .00 .00 102 123 .00 .00 .00 .00 .00 49 .00
6 .00 .00 .00 102 150 .00 .00 .00 .00 .00 50 .00
7 .00 .00 .00 102 150 .00 .00 .00 .00 .00 51 .00
8 .00 .00 .00 40 150 .00 .00 .00 .00 .00 51 .00
9 .00 .00 .00 .00 150 .00 .00 .00 .00 .00 52 .00
10 .00 .00 29 .00 123 .00 .00 .00 .00 .00 52 .00
11 .00 .00 47 .00 104 .00 .00 .00 .00 .00 53 .00
12 .00 .00 22 .00 98 .00 .00 .00 .00 .00 24 .00
13 .00 .00 .00 .00 75 .00 .00 .00 .00 .00 .00 .00
14 .00 .00 .00 .00 75 .00 .00 .00 .00 .00 .00 .00
15 .00 .00 .00 67 75 .00 .00 .00 .00 .00 .00 .00
16 .00 .00 .00 100 30 .00 .00 .00 .00 .00 .00 .00
17 .00 .00 .00 100 .00 .00 .00 .00 .00 .00 .00 .00
18 .00 .00 .00 94 .00 .00 .00 .00 .00 .00 .00 .00
19 .00 .00 .00 49 .00 .00 .00 .00 .00 .00 .00 .00
20 .00 .00 .00 20 .00 .00 .00 .00 .00 .00 .00 .00
21 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00
22 .00 22 27 .00 .00 .00 .00 .00 .00 .00 .00 .00
23 .00 1.0 82 63 .00 .00 .00 .00 .00 .00 .00 .00
24 .00 .00 68 101 .00 .00 .00 .00 .00 .00 .00 .00
25 .00 .00 38 150 .00 .00 .00 .00 .00 .00 .00 .00
26 .00 .00 68 651 .00 .00 .00 .00 .00 .00 .00 .00
27 .00 .00 100 185 53 .00 .00 .00 .00 .00 .00 .00
28 .00 .00 97 .00 87 .00 .00 .00 .00 .00 .00 .00
29 .00 .00 96 .00 --- .00 .00 .00 .00 .00 .00 .00
30 .00 .00 54 .00 --- .00 .00 .00 .00 33 .00 .00
31 .00 --- 12 .00 --- .00 --- .00 --- 49 .00 ---
TOTAL 0.00 23.00 740.00 2292.00 1602.00 23.00 0.00 0.00 0.00 82.00 454.00 0.00
MEAN .000 .77 23.9 73.9 57.2 .74 .000 .000 .000 2.65 14.6 .000
MAX .00 22 100 651 150 23 .00 .00 .00 49 53 .00
MIN .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00
AC-FT .00 46 1470 4550 3180 46 .00 .00 .00 163 901 .00
a 9450 0 0 0 0 0 14790 54560 52720 71330 58220 50570
b 1440 12530 10780 5090 254 6270 51100 69940 60110 70450 64520 52340
c 8 0 15 646 0 291 804 871 611 605 511 348
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1981 - 1997, BY WATER YEAR (WY)
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN .071 1.07 15.0 29.5 106 167 27.5 18.1 1.98 .60 3.00 .25
MAX .19 4.03 50.8 73.9 403 739 84.1 75.5 9.84 2.65 14.6 1.18
(WY) 1983 1983 1983 1997 1983 1983 1983 1983 1983 1997 1997 1983
MIN .000 .000 .000 .081 .72 .74 .000 .000 .000 .000 .000 .000
(WY) 1996 1996 1996 1996 1981 1997 1997 1997 1981 1996 1996 1996
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1981 - 1997
ANNUAL TOTAL 3540.60 5216.00
ANNUAL MEAN 9.67 14.3 30.5
HIGHEST ANNUAL MEAN 118 1983
LOWEST ANNUAL MEAN 1.14 1981
HIGHEST DAILY MEAN 730 Feb 20 651 Jan 26 1990 Mar 3 1983
LOWEST DAILY MEAN .00 Jan 1 .00 Oct 1 .00 Oct 1 1980
ANNUAL SEVEN-DAY MINIMUM .00 Jan 1 .00 Oct 1 .00 Oct 1 1980
INSTANTANEOUS PEAK FLOW 2290 Mar 2 1983
INSTANTANEOUS PEAK STAGE 7.51 Mar 2 1983
ANNUAL RUNOFF (AC-FT) 7020 10350 22130
TOTAL FLOW (AC-FT) a 311600
TOTAL FLOW (AC-FT) b 417400
TOTAL FLOW (AC-FT) c 4710
10 PERCENT EXCEEDS 22 53 51
50 PERCENT EXCEEDS .00 .00 .05
90 PERCENT EXCEEDS .00 .00 .00
a Flow, in acre-feet, through Mojave Siphon Powerplant, provided by California Department of Water Resources.
b Flow, in acre-feet, through Devil Canyon Powerplant, provided by California Department of Water Resources.
c Flow, in acre-feet, through Las Flores Release, provided by California Department of Water Resources.
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Last modified: Wed Mar 10 14:06:22 PST 1999