11108092 ELDERBERRY FOREBAY NEAR CASTAIC, CA.  


LOCATION - Lat 34°33'46", long 118°37'58", in SW 1/4 SE 1/4 sec.36, T.6 N., R.17 W., Los Angeles 
County, Hydrologic Unit 18070102, Angeles National Forest, in outlet tower in Elderberry Forebay, and 
5 mi north of Castaic.

PERIOD OF RECORD - October 1995 to current year. Prior to October 1995 in files of California Department 
of Water Resources.

GAGE - Water-stage recorder. Elevation of gage is sea level (levels by Los Angeles Department of Water 
and Power).

REMARKS - Forebay is formed by a concrete dam on Castaic Creek completed in 1974. Capacity, 32,476 acre-ft, 
at spillway crest on dam, at elevation 1,540 ft. Storage at normal minimum pool, 12,228 acre-ft, 
at elevation 1,490 ft. Forebay receives water from Pyramid Lake (station 11109520) via Castaic Powerplant. 
Water is pumped at times to Pyramid Lake during off-peak periods to be re-released through 
the powerplant. Records, including extremes, represent total contents at 2400 hours. See schematic 
diagram of Santa Clara River Basin.

COOPERATION - Records were provided by California Department of Water Resources, under the general supervision 
of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project 
2426. Contents not rounded to U.S. Geological Survey standards. EXTREMES (AT 2400 HOURS)

FOR PERIOD OF RECORD - Maximum contents, 31,537 acre-ft, Oct. 5, 2000, elevation, 1,538.09 ft; minimum, 
15,716 acre-ft, Feb. 9, 1996, elevation, 1,500.54 ft. EXTREMES (AT 2400 HOURS)

FOR CURRENT YEAR - Maximum contents, 30,492 acre-ft, Dec. 28, elevation, 1,535.94 ft; minimum, 16,964 
acre-ft, May 5, elevation, 1,504.05 ft. Capacity table (elevation in feet, and contents, in acre-feet) 
Based on table provided by California Department of Water Resources dated Jan. 27, 1995) 1,490 12,228 
1,510 19,183 1,530 27,680 1,540 32,476 1,500 15,527 1,520 23,240

              RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001

                                               DAILY OBSERVATION AT 2400 HOURS

DAY      OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

1      19540    22138    25203    18943    24513    22446    18089    22283    23686    22901    22795    26877
2      22543    24065    22960    21331    21229    20325    17533    21388    21059    24982    21047    25411
3      23823    29843    21906    22050    18119    20441    21087    22413    17339    25771    26886    21617
4      23011    25128    23793    24868    18543    19200    20672    23767    19311    19138    21193    20441
5      24096    22263    23909    23360    19292    19622    20797    16964    18901    18048    22766    17636

6      22555    25380    27779    20813    21984    20962    24592    20325    20072    22005    22960    21992
7      21691    27741    27092    18985    21519    19622    21543    23049    26800    21498    25861    17149
8      19544    27663    24035    25660    24605    21708    20005    24531    29599    22263    24109    17821
9      20821    24750    19323    21955    25682    23595    20464    23390    25982    19057    24531    18521
10     21079    25097    17884    25053    23780    20877    19989    27413    22379    17237    24802    20752

11     21156    22648    21470    22497    19042    19080    20060    24426    19424    17747    26157    20628
12     21067    18931    22686    25495    19950    19084    22192    20520    21654    24496    21601    22956
13     22005    25247    20536    24369    26166    20060    17544    20001    19096    25606    23369    28869
14     22497    24960    22430    21918    22221    20202    18325    20660    22497    23553    19416    27538
15     23343    23591    23045    24544    25079    21051    18378    18962    24566    19291    23548    18623

16     26341    24509    23066    27074    21889    18790    26319    21687    24974    18011    26265    20298
17     26946    28356    17259    24846    21282    18775    25443    21901    22288    22067    28713    22063
18     24960    21786    22104    22994    18100    20397    25004    22196    26568    24422    28408    21303
19     27367    21376    22623    21724    20361    25478    25861    19408    24330    23975    22192    20560
20     27023    24087    20728    19031    20536    24815    26427    21376    23841    28831    21047    25696

21     24890    23815    19856    17280    22005    20889    22774    23634    27358    26477    19315    29391
22     18442    23300    23313    18160    25509    19879    20163    25013    29752    22059    18175    21169
23     19633    18419    17906    19903    24052    23664    21364    26351    25762    20720    21470    19993
24     24452    21311    18817    19872    22681    19883    25651    27152    18619    24960    23742    21716
25     23910    20468    21238    23664    19261    17992    28384    26659    20365    22711    22138    24842

26     24496    24005    22442    24908    19342    16975    28544    24261    25251    28614    18859    22333
27     25282    20636    24837    24540    24513    21059    28807    19269    25852    29048    21798    26749
28     23854    23024    30492    19104    24513    22631    23070    20266    26265    25389    22113    26586
29     20195    21360    26822    20457      ---    20076    19872    21778    29394    20516    22791    20191
30     20797    24658    22417    21523      ---    23326    22576    22816    29418    21823    23045    19934

31     19661      ---    20962    25327      ---    18445      ---    25260      ---    24426    28272      ---
MAX    27367    29843    30492    27074    26166    25478    28807    27413    29752    29048    28713    29391
MIN    18442    18419    17259    17280    18100    16975    17533    16964    17339    17237    18175    17149
a    1511.23  1523.28  1514.51  1524.80  1522.95  1508.06  1518.43  1524.65  1533.70  1522.75  1531.27  1511.93
b      -3316    +4997    -3696    +4365     -814    -6068    +4131    +2684    +4158    -4992    +3846    -8338
CAL YR 2000 b -6358
WTR YR 2001 b -3043