10287280 GEM LAKE NEAR JUNE LAKE, CA
LOCATION.-Lat 37°45'07", long 119°08'25", unsurveyed, T.2 S., R.26 E., Mono County, Hydrologic Unit
18090101, Inyo National Forest, in valve house, 100 ft downstream from left abutment of dam, on Rush Creek, and
4.0 mi southwest of town of June Lake.
DRAINAGE AREA.-22.0 mi2.
PERIOD OF RECORD.-October 1990 to current year. Unpublished records prior to October 1990 available in files of
Southern California Edison Co.
GAGE.-Water-stage recorder. Datum of gage is sea level (levels by Southern California Edison Co.).
REMARKS.-Reservoir is formed on natural lake by concrete dam completed in 1916. Usable capacity, 17,798 acre-ft,
between elevations 8,964.33 ft, invert of outlet, and 9,053.64 ft, crest of upper spillway. Figures given
represent usable contents. Water is used for power development downstream.
COOPERATION.-Records 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, 17,553 acre-ft, July 29, 1995, elevation, 9,052.78 ft; minimum,
139 acre-ft, Apr. 18, 1999, elevation, 8,970.86 ft.
EXTREMES FOR CURRENT YEAR.-Maximum contents, 17,482 acre-ft, June 29, July 1, elevation, 9,052.53 ft; minimum,
139 acre-ft, Apr. 18, elevation, 8,970.86 ft.
Capacity table (elevation, in feet, and contents, in acre-feet)
(Based on survey by Southern California Edison Co., dated Sept. 1, 1981)
8,980 441 9,010 6,547
8,985 1,348 9,025 10,121
8,990 2,300 9,040 14,023
9,000 4,345 9,055 18,187
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 14866 13940 11816 9299 6806 4449 1658 1819 10465 17482 15733 15499
2 14736 13798 11811 9280 6692 4459 1660 1858 10916 17479 15722 15502
3 14603 13608 11774 9243 6579 4372 1613 1844 11323 17451 15678 15499
4 14467 13549 11720 9114 6458 4293 1564 1810 11707 17417 15656 15507
5 14332 13477 11686 9005 6345 4201 1529 1628 12061 17386 15606 15510
6 14206 13403 11645 8892 6230 4110 1473 1521 12414 17349 15576 15515
7 14069 13347 11604 8768 6246 4026 1425 1588 12558 17357 15537 15515
8 13942 13267 11501 8650 6172 3869 1379 1778 12656 17369 15504 15548
9 13811 13195 11439 8638 6120 3755 1310 1893 12759 17369 15474 15604
10 13669 13139 11308 8612 5959 3639 1238 1964 12880 17360 15471 15675
11 13531 13073 11192 8490 5851 3520 1132 2118 13028 17386 15463 15708
12 13411 13020 11182 8365 5734 3389 842 2497 13185 17363 15480 15747
13 13262 12946 11161 8246 5736 3378 452 2857 13357 17386 15485 15780
14 13126 12883 11038 8120 5734 3378 302 3180 13547 17357 15491 15816
15 12994 12830 10929 8018 5607 3247 277 3387 13733 17324 15493 15858
16 12851 12780 10791 8004 5512 3120 212 3581 13910 17292 15493 15929
17 12716 12701 10680 7990 5384 3003 144 3854 14093 17247 15496 15990
18 12582 12627 10573 7893 5279 2885 139 4163 14276 17194 15499 16063
19 12440 12553 10556 7808 5158 2782 151 4487 14570 17137 15493 16132
20 12285 12475 10538 7717 5169 2784 181 4836 15093 17075 15482 16193
21 12262 12409 10422 7595 5182 2772 249 5196 15543 17019 15493 16243
22 12435 12338 10347 7497 5051 2659 375 5592 15924 16957 15496 16299
23 12764 12272 10219 7506 4948 2536 1022 6049 16360 16856 15485 16313
24 13076 12220 10096 7511 4836 2424 1438 6524 16772 16744 15491 16285
25 13355 12149 9974 7413 4715 2306 1485 7027 17084 16618 15493 16252
26 13597 12089 9954 7301 4594 2202 1550 7506 17278 16500 15502 16210
27 13822 12016 9929 7190 4585 2200 1622 7988 17349 16380 15496 16229
28 13999 11949 9802 7080 4592 2192 1685 8511 17372 16257 15502 16299
29 14149 11904 9668 6972 --- 2075 1741 9003 17482 16124 15507 16330
30 14106 11878 9550 6965 --- 1908 1776 9486 17479 15996 15491 16355
31 14023 --- 9417 6960 --- 1804 --- 9969 --- 15863 15496 ---
MAX 14866 13940 11816 9299 6806 4459 1776 9969 17482 17482 15733 16355
MIN 12262 11878 9417 6960 4585 1804 139 1521 10465 15863 15463 15499
a 9040.00 9031.89 9022.16 9011.81 9001.16 8987.43 8987.28 9024.39 9052.52 9046.75 9045.42 9048.52
b -966 -2145 -2461 -2457 -2368 -2788 -28 +8193 +7510 -1616 -367 +859
CAL YR 1998 MAX 17491 MIN 1186 b +2902
WTR YR 1999 MAX 17482 MIN 139 b +1366
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