11231000 LAKE THOMAS A. EDISON NEAR BIG CREEK, CA
LOCATION.-Lat 37°22'09", long 118°59'17", unsurveyed, T.6 1/2 S., R.27 E., Fresno County, Hydrologic
Unit 18040006, Sierra National Forest, in outlet works of Vermillion Valley Dam, on Mono Creek, 18.1 mi northeast
of town of Big Creek.
DRAINAGE AREA.-90.0 mi2.
PERIOD OF RECORD.-October 1954 to current year. Prior to 1960, maximum and minimum daily contents were published.
GAGE.-Water-stage recorder. Datum of gage is sea level (levels by Southern California Edison Co.).
REMARKS.-Lake is formed by earthfill dam; dam completed and storage began Oct. 12, 1954. Usable capacity, 125,035
acre-ft between elevations 7,508.9 ft, invert of outlet works, and 7,642.50 ft, top of gates in service spillway.
Water is diverted at times into lake from Warm Creek (station 11231700). Water is released for diversion to Ward
Tunnel via Mono Creek Conduit (station 11231550). Records, including extremes, represent contents at 2400 hours.
See schematic diagram of upper San Joaquin River Basin.
COOPERATION.-Records were collected by Southern California Edison Co., under general supervision of the U.S.
Geological Survey, in connection with a Federal Energy Regulatory Commission project. Contents not rounded to
U.S. Geological Survey standards.
EXTREMES FOR PERIOD OF RECORD.-Maximum contents, 125,983 acre-ft, Sept. 26, 1982, elevation, 7,643.55 ft; minimum
since appreciable storage was attained, 4,553 acre-ft, Dec. 27, 1987, elevation, 7,552.07 ft.
EXTREMES FOR CURRENT YEAR.-Maximum contents, 122,928 acre-ft, July 14, elevation, 7,641.36 ft; minimum, 49,672
acre-ft, Mar. 25, 26, elevation, 7,597.03 ft.
Capacity table (elevation, in feet, and contents, in acre-feet)
(Based on table provided by Southern California Edison Co., dated July 22, 1955)
7,550 3,567 7,580 28,515 7,620 85,006
7,555 6,147 7,590 40,454 7,630 102,367
7,560 9,521 7,600 53,769 7,640 120,424
7,570 18,137 7,610 68,616 7,644 127,820
RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY OBSERVATION AT 2400 HOURS
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 119837 106626 84228 76015 56236 50845 49849 54404 84888 118994 113797 91257
2 119599 105803 84058 75296 55637 50804 49863 54658 86197 119727 113071 90497
3 119379 105018 83872 74629 55025 50777 49863 54884 87203 120351 112528 89723
4 119178 104269 83652 73948 54390 50722 49863 55081 87990 120884 111823 88967
5 119013 103433 83449 73043 53797 50668 49863 55366 88726 121362 111082 88178
6 118866 102598 83230 72368 53211 50599 49877 55765 89413 121766 110307 87391
7 118756 101871 83078 71693 52751 50531 49890 56279 90118 122006 109514 86605
8 118609 101075 82860 70992 52195 50504 49904 56780 90981 121822 108706 85857
9 118463 100192 82674 70307 52029 50477 49904 57371 91844 121601 107951 85057
10 118335 99504 82523 69642 52002 50408 49904 58093 92900 121435 107235 84278
11 118189 98694 82355 68979 51974 50327 49877 58836 94010 121711 106537 83466
12 118079 97939 82186 68288 51947 50258 49836 59846 95123 122042 105839 82691
13 117969 97184 81984 67584 51905 50177 49849 60907 96450 122521 105072 81951
14 117768 96433 81816 66929 51850 50122 49972 61697 98167 122928 104269 81129
15 117604 95646 81631 66327 51781 50067 50136 62638 99839 122909 103700 80260
16 117366 95175 81430 65693 51712 50013 50327 64485 101517 122706 103291 79378
17 117220 94689 81263 65080 51698 49945 50559 63830 103060 122318 102527 78548
18 117092 93871 81063 64500 51643 49890 50804 64867 104590 121822 101783 77657
19 116708 93125 80828 63951 51547 49863 51105 65879 106214 121307 100986 76751
20 116253 92346 80594 63423 51491 49863 51450 67084 107646 120755 100192 76031
21 115597 91568 80394 62804 51464 49781 51836 68288 108957 120277 99416 75459
22 114741 90808 80176 62204 51395 49726 52181 69658 110217 119874 98694 75067
23 113906 90015 79976 61667 51312 49726 52402 71040 111660 119581 97939 74515
24 113107 89259 79793 61085 51216 49686 52625 72609 112872 119196 97202 73786
25 112293 88469 79627 60480 51133 49672 52876 74191 113997 118793 96485 72995
26 111497 87665 79444 59890 51050 49672 53155 75786 114941 118171 95786 72143
27 110721 86929 79245 59259 50981 49699 53462 77278 115816 117421 95106 71837
28 109892 86214 78780 58647 50900 49726 53769 78847 116635 116708 94376 71837
29 109065 85465 78101 58035 --- 49754 53981 80427 117439 115998 93645 71837
30 108239 84735 77443 57429 --- 49767 54192 81816 118152 115233 92848 71837
31 107432 --- 76767 56823 --- 49836 --- 83331 --- 114523 92052 ---
MAX 119837 106626 84228 76015 56236 50845 54192 83331 118152 122928 113797 91257
MIN 107432 84735 76767 56823 50900 49672 49836 54404 84888 114523 92052 71837
a 7632.84 7619.84 7615.07 7602.15 7597.93 7597.15 7600.30 7619.01 7638.76 7636.77 7624.11 7612.03
b -12552 -22697 -7968 -19944 -5923 -1064 +4356 +29139 +34821 -3629 -22471 -20215
CAL YR 1998 b +38843
WTR YR 1999 b -48147
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