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  Unpublished records prior to October 1990 available in files of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, 16,648 acre-ft, Aug. 1, elevation, 9,049.57 ft; minimum,
   868 acre-ft, Apr. 22, elevation, 8,982.40 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 1995 TO SEPTEMBER 1996
                                        DAILY OBSERVATION AT 2400 HOURS

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

  1     15337    14473    11434     8624     6647     4985     2851     2481     7600    13741    16648    14502
  2     15290    14378    11328     8552     6574     4922     2713     2692     7628    14039    16637    14389
  3     15211    14281    11220     8480     6515     4864     2568     2885     7698    14163    16618    14284
  4     15129    14184    11118     8394     6476     4830     2424     3052     7778    14354    16578    14173
  5     15071    14079    11018     8320     6431     4750     2276     3212     7853    14546    16531    14052

  6     15121    13985    10909     8244     6376     4669     2123     3372     7934    14736    16486    13948
  7     15148    13889    10817     8168     6311     4583     1997     3547     8108    14932    16444    13832
  8     15181    13787    10705     8085     6252     4564     1875     3722     8339    15126    16391    13725
  9     15181    13688    10614     8018     6187     4592     1772     3886     8562    15326    16349    13613
 10     15227    13584    10513     7938     6123     4618     1685     4053     8759    15485    16293    13613

 11     15230    13483    10462     7867     6058     4650     1588     4272     8931    15604    16246    13749
 12     15227    13389    10427     7797     5986     4687     1639     4536     9231    15753    16210    13881
 13     15227    13296    10342     7726     5925     4730     1620     4815     9698    15946    16168    13996
 14     15219    13185    10251     7639     5860     4754     1620     5099    10219    16068    16124    14114
 15     15197    13081    10166     7572     5791     4783     1651     5426    10700    16179    16077    14230

 16     15205    12983    10088     7532     5732     4806     1693     5869    11130    16238    16024    14321
 17     15263    12883     9996     7453     5672     4830     1714     6170    11508    16296    15977    14410
 18     15309    12774     9907     7406     5603     4810     1587     6426    11886    16344    15916    14497
 19     15345    12677     9822     7334     5590     4680     1432     6633    12285    16399    15863    14668
 20     15378    12579     9728     7274     5550     4536     1218     6815    12540    16452    15777    14913

 21     15389    12469     9641     7213     5523     4402      893     6990    12624    16500    15667    15123
 22     15318    12367     9547     7193     5463     4267      868     7139    12650    16520    15571    15386
 23     15225    12262     9464     7183     5408     4125      912     7262    12682    16489    15458    15513
 24     15126    12165     9363     7126     5355     3986      934     7364    12703    16469    15356    15590
 25     15082    12055     9270     7070     5298     3841     1257     7378    12708    16430    15249    15626

 26     15047    11949     9182     7004     5242     3701     1609     7392    12806    16402    15143    15480
 27     14954    11839     9090     6972     5176     3557     1772     7486    12981    16397    15033    15279
 28     14861    11738     9003     6886     5112     3414     1916     7537    13153    16402    14926    15093
 29     14763    11640     8909     6822     5053     3261     2054     7630    13336    16444    14820    14905
 30     14671    11534     8812     6754      ---     3124     2270     7660    13536    16575    14719    14714
 31     14573      ---     8723     6713      ---     2977      ---     7616      ---    16629    14611      ---

MAX     15389    14473    11434     8624     6647     4985     2851     7660    13536    16629    16648    15626
MIN     14573    11534     8723     6713     5053     2977      868     2481     7600    13741    14611    13613
 a    9042.04  9030.56  9019.30  9010.73  9003.29  8993.42  8989.85  9014.64  9038.18  9049.50  9042.18  9042.56
 b       -846    -3039    -2811    -2010    -1660    -2076     -707    +5346    +5920    +3093    -2018     +103

CAL YR 1995   MAX 17553  MIN 1881  b +1013
WTR YR 1996   MAX 16648  MIN  868  b  -705

  a Elevation, in feet, at end of month.
  b Change in contents, in acre-feet.