10270870  LAKE SABRINA NEAR BISHOP, CA

LOCATION.--Lat 38°12'44", long 118°36'42", unsurveyed, T.8 S., R.31 E., Inyo County, Hydrologic Unit 18090102,
   Inyo National Forest, in valve house at base of dam on Middle Fork Bishop Creek and 15.8 mi southwest of
   Bishop.
DRAINAGE AREA.--16.5 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  Unpublished records prior to October 1990 available in files of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 rock-fill dam completed in 1908.  Usable capacity, 7,350 acre-ft
   between elevations 9,068.42 ft, invert of outlet, and 9,131.62 ft, crest of spillway.  Figures given represent
   usable contents.  Water is used for power development downstream.  See schematic diagram of Bishop Creek
   basin.

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, 7,598 acre-ft, July 10, 1995, elevation, 9,132.89 ft; minimum,
   no storage Apr. 8-14, 1994.

EXTREMES FOR CURRENT YEAR.--Maximum contents, 7,498 acre-ft, July 9, elevation, 9,132.38; minimum, 376 acre-ft,
   Apr. 22, elevation, 9088.37 ft.

                         Capacity table (elevation, in feet, and contents, in acre-feet)
                    (Based on survey by Southern California Edison Co., dated Aug. 12, 1981)

					9,068.42	    0		9,100	1,926
					9,070	    1		9,110	3,501
					9,080	   15		9,120	5,196
					9,090	  558		9,135	7,912

                    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      6945     6651     6160     5858     4572     3312     1808      775     2035     6385     7383     6762
  2      6938     6636     6127     5844     4511     3265     1708      832     2101     6487     7371     6704
  3      6926     6621     6110     5834     4455     3219     1592      871     2222     6642     7350     6636
  4      6911     6609     6105     5816     4422     3184     1478      905     2394     6817     7316     6577
  5      6896     6594     6086     5798     4388     3141     1361      938     2604     6974     7285     6505

  6      6888     6581     6070     5784     4338     3091     1245      970     2841     7132     7281     6426
  7      6886     6566     6052     5768     4288     3046     1142     1006     3113     7291     7289     6353
  8      6882     6549     6033     5751     4238     2996     1047     1037     3422     7428     7301     6279
  9      6876     6530     6015     5735     4187     2944      951     1068     3724     7498     7322     6201
 10      6873     6519     5996     5721     4138     2893      857     1109     3991     7492     7342     6103

 11      6861     6502     6011     5687     4086     2839      767     1169     4187     7475     7359     6015
 12      6854     6488     6053     5633     4034     2798      677     1251     4351     7479     7377    e5929
 13      6848     6472     6052     5574     3982     2755      588     1356     4514     7451     7395    e5849
 14      6840     6456     6055     5517     3927     2706      504     1508     4694     7426     7402    e5764
 15      6831     6440     6050     5455     3868     2656      456     1678     4878     7416     7410    e5692

 16      6823     6423     6044     5420     3819     2604      434     1855     5048     7408     7404    e5613
 17      6815     6408     6037     5358     3763     2554      413     1954     5177     7379     7402    e5531
 18      6808     6391     6029     5305     3707     2507      391     2035     5308     7344     7393    e5478
 19      6796     6372     6020     5257     3687     2457      383     2059     5455     7305     7379    e5451
 20      6786     6355     6009     5201     3673     2409      383     2074     5595     7279     7359    e5425

 21      6771     6337     5998     5163     3646     2360      379     2097     5732     7270     7357    e5407
 22      6758     6320     5987    e5110     3626     2309      376     2098     5845     7278     7334    e5405
 23      6744     6305     5978     5060     3599     2257      380     2092     5960     7303     7281    e5404
 24      6733     6286     5965     5005     3562     2200      391     2082     6077     7340     7223    e5402
 25      6721     6268     5954     4958     3530     2142      421     2067     6179     7361     7169    e5400

 26      6706     6224     5940     4902     3489     2088      469     2041     6244     7375     7115    e5398
 27      6701     6227     5924     4856     3450     2033      524     2026     6275     7393     7059    e5397
 28      6685     6210     5913     4802     3404     1975      577     2006     6288     7445     7005    e5395
 29      6678     6188     5902     4744     3360     1920      631     1996     6299     7440     6945    e5395
 30      6672     6175     5887     4684      ---     1869      700     1990     6327     7420     6886     5393
 31      6661      ---     5873     4631      ---     1833      ---     1999      ---     7399     6823      ---

MAX      6945     6651     6160     5858     4572     3312     1808     2098     6327     7498     7410     6762
MIN      6661     6175     5873     4631     3360     1833      376      775     2035     6385     6823     5393
 a    9128.04  9125.45  9123.80  9116.73  9109.14  9099.38  9091.22  9100.49  9126.27  9131.87  9128.89  9121.12
 b       -300     -486     -302    -1242    -1271    -1527    -1133    +1299    +4328    +1072     -576    -1430

CAL YR 1995   MAX 7598  MIN   1.5  b +1242
WTR YR 1996   MAX 7498  MIN 376    b -1568

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