2000 California Hydrologic Data Report
10260780 EAST BRANCH CALIFORNIA AQUEDUCT AT MOJAVE SIPHON POWERPLANT, NEAR HESPERIA, CA.
LOCATION - Lat 34 °16 '25", long 117 ° Bernardino National Forest, in powerplant and bypass channel,
0.2 mi north of Silverwood Lake, and 8.3 mi south of Hesperia.
PERIOD OF RECORD - October 1995 to current year. Unpublished record for water years 1975 to 1994 available
in files of the California Department of Water Resources. Published as "Mojave Siphon Powerplant"
prior to October 1999.
REVISED RECORDS - WDR CA-00-1: 1997.99.
GAGE - Acoustic-velocity meters on intake pipes. Water stage recorder in stilling well on bypass flume.
Elevation of powerplant is 3,182 ft above sea level. Elevation of bypass gage is 3,372.5 ft above
sea level (from California Department of Water Resources).
REMARKS - Flow at this site represents East Branch California Aqueduct water to Silverwood Lake. Flow
at this site has two components which
COOPERATION - Records were collected by California Department of Water Resources, under general supervision
of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project
2426.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 2,200 ft 3 /s, July 14, 1997; no flow for many
days in some years.
REVISIONS - The monthly acre-feet totals for water years 1997 to 1999 were published in error. The daily
value tables for these years are published with the revised acre-feet totals. These supersede figures
published in the reports for 1997, 1998 and 1999.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997
DAILY MEAN VALUES
(NOT PREVIOUSLY PUBLISHED)
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 86 .00 .00 4.5 .50 .00 910 848 1590 1010 792 1870
2 592 .00 .00 3.5 .50 .00 647 878 1190 664 1420 1130
3 126 .00 .00 4.5 .50 .00 887 1260 1130 1490 1710 458
4 260 .00 .00 4.5 .50 .00 835 1540 1080 1620 1090 414
5 303 .00 .00 4.0 .50 .00 893 961 1140 1570 919 443
6 211 .00 .00 4.0 .50 .00 1520 901 951 1450 953 490
7 199 .00 .00 5.0 .50 2.5 1460 898 1090 1160 877 787
8 300 .00 .00 6.1 .50 361 1100 600 853 1010 815 1030
9 117 .00 .00 6.6 .50 319 1200 448 1030 994 1180 612
10 299 .00 .00 6.6 .00 .50 1060 565 556 1010 1350 617
11 300 .00 .00 7.6 .00 22 1110 1480 690 1010 1170 786
12 264 .00 .00 8.1 .50 504 811 984 757 1770 966 544
13 242 .00 .00 7.1 5.0 560 1330 1190 739 1120 1330 364
14 253 .00 .00 7.1 .50 732 1740 1140 779 2200 1260 1900
15 164 .00 .00 5.5 .50 1180 1820 1200 871 1520 1210 1140
16 166 .00 .00 6.6 .50 1350 1830 1150 902 1050 1430 703
17 169 .00 .00 6.1 .50 731 1550 1310 940 1100 2110 1270
18 165 .00 .00 5.5 .50 814 1430 1860 576 1040 1360 924
19 165 .00 .00 4.5 .50 829 1500 1340 1230 1670 674 852
20 167 .00 .00 5.0 .50 714 1480 700 878 1700 1200 1480
21 169 .00 .00 6.1 .50 612 1530 1200 1220 1400 1110 1410
22 .00 .00 .00 5.5 .50 605 1510 665 1300 1180 1100 1400
23 53 .00 .00 3.5 .00 859 1410 1160 1620 1100 1020 1060
24 91 .00 .00 .50 .00 420 1070 1160 911 856 1740 931
25 65 .00 .00 .50 .00 15 913 1600 817 920 1320 952
26 42 .00 .00 .50 .00 14 1270 1830 1000 1510 961 875
27 68 .00 .00 .50 .00 13 1230 1310 1560 1650 674 775
28 .00 .00 6.1 .50 .00 267 1320 1150 1060 1410 589 1380
29 .00 .00 9.1 .50 --- 763 922 1140 1020 899 410 948
30 .00 .00 9.1 113 --- 1380 762 1140 960 908 618 933
31 .00 --- 5.0 1.0 --- 1260 --- 1260 --- 891 1430 ---
TOTAL5036.00 0.00 29.30 244.50 14.50 14327.00 37050 34868 30440 38882 34788 28478
MEAN 162 .000 .95 7.89 .52 462 1235 1125 1015 1254 1122 949
MAX 592 .00 9.1 113 5.0 1380 1830 1860 1620 2200 2110 1900
MIN .00 .00 .00 .50 .00 .00 647 448 556 664 410 364
AC-FT 9990 .00 58 485 29 28420 73490 69160 60380 77120 69000 56490
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1996 - 1997, BY WATER YEAR (WY)
MEAN 92.5 34.2 122 64.2 112 315 1123 1021 944 1128 1077 1017
MAX 162 68.4 243 121 220 462 1235 1125 1015 1254 1122 1086
(WY) 1997 1996 1996 1996 1996 1997 1997 1997 1997 1997 1997 1996
MIN 22.6 .000 .95 7.89 .52 169 1010 916 873 1001 1031 949
(WY) 1996 1997 1997 1997 1997 1996 1996 1996 1996 1996 1996 1997
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1996 - 1997
ANNUAL TOTAL 200889.20 224157.30
ANNUAL MEAN 549 614 589
HIGHEST ANNUAL MEAN 614 1997
LOWEST ANNUAL MEAN 563 1996
HIGHEST DAILY MEAN 1530 Apr 18 2200 Jul 14 2200 Jul 14 1997
LOWEST DAILY MEAN .00 Oct 22 .00 Oct 22 .00 Oct 11 1995
ANNUAL SEVEN-DAY MINIMUM .00 Oct 28 .00 Oct 28 .00 Oct 11 1995
ANNUAL RUNOFF (AC-FT) 398500 444600 426400
10 PERCENT EXCEEDS 1180 1430 1280
50 PERCENT EXCEEDS 510 605 589
90 PERCENT EXCEEDS .00 .00 .00
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