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 Unpublished records prior to October 1990 available in files of Southern California 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, 868 acre-ft, 
  Apr. 22, 1996, elevation, 8,982.40 ft. 
EXTREMES FOR CURRENT YEAR.-Maximum contents, 17,309 acre-ft, July 15, 16, elevation, 9,051.92 ft; minimum, 1,253 acre-ft, Apr. 13, 
  elevation, 8,984.50 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 1996 TO SEPTEMBER 1997

                                        DAILY OBSERVATION AT 2400 HOURS
 
DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
  1     14521    10369     7745     6019     5360     2503     1390     4041    10392    16968    16892    13169
  2     14327    10216     7656     6533     5200     2450     1402     4152    10797    16940    16797    13034
  3     14149    10051     7565     7236     5033     2413     1311     4304    11195    16898    16704    12883
  4     13958     9942     7500     7707     4873     2370     1274     4502    11710    16915    16612    12740
  5     13760     9857     7479     8141     4709     2349     1340     4737    12058    16954    16528    12598
 
  6     13565     9758     7362     8406     4547     2300     1417     4963    12215    16982    16455    12438
  7     13379     9663     7292     8542     4383     2294     1421     5231    12446    16999    16388    12267
  8     13248     9557     7232     8454     4235     2282     1397     5490    12724    17050    16319    12115
  9     13155     9466     7133     8342     4062     2276     1390     5769    13005    17126    16243    12050
 10     13060     9373     7105     8237     3899     2276     1395     6080    13240    17247    16157    11868
 
 11     12965     9280     7022     8113     3738     2290     1371     6410    13429    17301    16063    11712
 12     12878     9190     6953     7978     3575     2306     1319     6744    13586    17307    15957    11552
 13     12766     9126     6877     7858     3407     4676     1253     7025    13792    17301    15838    11400
 14     12672     9015     6795     7721     3323     4446     1272     7165    13999    17304    15714    11233
 15     12577     8938     6719     7581     3253     4255     1364     7325    14165    17309    15604    11079
 
 16     12472     8846     6649     7469     3194     4116     1415     7483    14370    17309    15466    10957
 17     12380     8824     6565     7369     3112     4009     1544     7628    14684    17270    15337    10919
 18     12288     8720     6490     7220     3063     3816     1685     7764    15091    17219    15211    11008
 19     12183     8682     6406     7075     3015     3643     1825     7872    15543    17163    15069    11228
 20     12089     8612     6356     6962     2977     3428     1990     7976    15855    17106    14937    11573
 
 21     11988     8566     6331     6831     2900     3148     2212     8075    16163    17070    14804    11891
 22     11889     8511     6331     6719     2851     2879     2419     8160    16402    17086    14665    12186
 23     11839     8435     6297     6585     2810     2729     2586     8215    16539    17120    14540    12456
 24     11679     8358     6226     6454     2749     2657     2680     8265    16643    17177    14386    12706
 25     11483     8275     6163     6365     2696     2556     2772     8310    16755    17205    14249    12938
 
 26     11284     8196     6112     6250     2641     2359     2958     8353    16853    17182    14071    13142
 27     11090     8101     6051     6109     2588     2135     3233     8437    16932    17165    13929    13315
 28     10939     8009     5977     5965     2546     1942     3504     8569    16996    17129    13779    13448
 29     10804     7919     5947     5820      ---     1776     3695     8788    17030    17100    13624    13552
 30     10672     7832     5883     5668      ---     1647     3871     9241    17024    17044    13477    13571
 31     10520      ---     5849     5516      ---     1504      ---     9879      ---    16968    13323      ---
 
MAX     14521    10369     7745     8542     5360     4676     3871     9879    17030    17309    16892    13571
MIN     10520     7832     5849     5516     2546     1504     1253     4041    10392    16898    13323    10919
 a    9026.59  9015.56  9006.90  9005.40  8991.27  8985.84  8997.76  9024.03  9050.91  9050.71  9037.38  9038.31
 b      -4194    -2688    -1983     -333    -2970    -1042    +2367    +6008    +7145      -56    -3645     +248

CAL YR 1996   MAX 16648  MIN  868  b -2874
WTR YR 1997   MAX 17309  MIN 1253  b -1143