11313500  SALT SPRINGS RESERVOIR NEAR WEST POINT, CA

LOCATION.--Lat 38°29'55", long 120°12'52", in NW 1/4 SE 1/4 sec.33, T.8 N., R.16 E., Calaveras County, Hydrologic
   Unit 18040012, Eldorado National Forest, near center of Salt Springs Dam on North Fork Mokelumne River, 1.8 mi
   upstream from Cole Creek, and 18 mi northeast of West Point.
DRAINAGE AREA.--169 mi2.

PERIOD OF RECORD.--March 1931 to current year.  Prior to October 1964, records published as usable contents.
REVISED RECORDS.--WSP 1930:  Drainage area.

GAGE.--Water-stage recorder.  Prior to Oct. 1, 1991, nonrecording gage read once daily.  Datum of gage is sea
   level (levels by Pacific Gas & Electric Co.).

REMARKS.--Recorder malfunctioned Sept. 3-30.  Daily readings were used during this period. Reservoir is formed by
   concrete-faced rockfill dam, completed in 1931; storage began in March 1931. Capacity, 141,857 acre-ft between
   elevations 3,667.75 ft, outlet drain, and 3,958.0 ft, top of radial gates.  Storage of 1,860 acre-ft available
   for release to river only.  Water is released through Salt Springs Powerplant just downstream from dam and
   discharged into Tiger Creek Powerplant Conduit (station 11314000).  Figures given, including extremes,
   represent total contents.  See schematic diagram of Mokelumne River basin.
COOPERATION.--Records were collected by Pacific Gas & Electric 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, 142,091 acre-ft, July 3, 1993, elevation, 3,958.24 ft; no
   contents at times in 1932-33, 1945, 1962.
EXTREMES FOR CURRENT YEAR.--Maximum contents, 141,476 acre-ft, June 20, elevation, 3,957.60 ft; minimum,
   39,618 acre-ft, Dec. 29, elevation, 3,823.59 ft.

                         Capacity table (elevation, in feet, and contents, in acre-feet)
                   (Based on table provided by Pacific Gas & Electric Co., dated October 1964)
            3,700        1,251        3,720       3,519        3,740       7,324        3,800      28,017
            3,705        1,679        3,725       4,324        3,750       9,799        3,850      54,852
            3,710        2,199        3,730       5,229        3,760      12,689        3,900      90,786
            3,715        2,812        3,735       6,230        3,780      19,632        3,960     143,788

                    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    100368    69188    50421    42095    46496    78352    79156   110381   135544   140903   123768    97761
  2     99591    68585    49449    42123    44572    78024    79464   113557   136248   140566   123483    96694
  3     98614    68152    48468    41984   e45600    77786    79524   116335   137002   140141   122850   e94922
  4     97509    67850    47622    41941   e51000    78144    79479   118562   137390   139796   122104   e93934
  5     96559    67442    46770    42078    56764    78136    79487   120664   137343   139228   121250   e92603

  6     95790    66991    45843    42190    59613    77801    79727   123019   137748   138798   120359   e91345
  7     95085    66593    44987    42306    61579    77577    80491   125468   138636   138415   119861   e90707
  8     93885    66218    44087    42421    62679    77293    81758   127870   139475   137842   119438   e89678
  9     92833    65702    43157    42525    63540    77241    83118   130019   139815   137324   119095   e88258
 10     91672    65120    42317    42738    64403    77129    84018   132292   139313   136497   118526   e87864

 11     91209    64576    41503    42997    65244    77234    84696   133598   139569   136012   118202   e86067
 12     89408   e63926    44345    43235    66099    77234    85393   134146   140787   135149   117593   e85835
 13     89258   e63416    44853    43509    66794    76994    85843   134220   141352   134362   116801   e84983
 14     88053    62905    44611    43770    67478    76617    86442   134676   141152   133784   115984   e84133
 15     87012    62315    44109    44077    68089    76359    87542   137135  e141200   133130   114909   e83133

 16     86895    61402    43520    44903    69110    76115    89487   136688  e141300   132942   114066   e82369
 17     86832    60996    42873    45332    70552    76122    90446   135206   141362   132989   113277   e80998
 18     85711    60321    42355    45557    71703    76403    91209   135112   141305   133055   112273   e80316
 19     84680    59679    41957    45746   e73178    76905    91473   134420   141352   132905   111286   e79487
 20     82224    59026    41536    45786   e74654    77659    91569   134353   141476   132546   110099   e78062

 21     80922    58469    41112    45832    77338    78352    91529   134296   141457   131413   108930   e77316
 22     79269    57677    40824    45775    78106    79013    91513   134362   141238   130532   108979   e76351
 23     78181    56662    40635    45735    78592    79224    91744   134156   140855   129789   108169   e75390
 24     77346    55569    40471    45843    79036    79194    92775   133645   140643   128981   107294   e74363
 25     76388    54476    40252    45855    79329    79089    94326   133738   140566   128336   106243   e74290

 26     75375    53610    40080    45700    79494    78810    96654   134128   140749   127971   105053   e74216
 27     74319    52838    39889    45632    79532    78698    99144   134600   141372   127326   103787   e73777
 28     73297    52240    39690    45367    79126    79119   101156   134686   141343   127456   102870   e73304
 29     72258    51962    39618    45419    78698    79021   104031   134932   141286   126716   101771   e72831
 30     71081    51408    40683    45798      ---    78878   107055   135008   140999   125191   100430   e72467
 31     70072      ---    41787    46280      ---    78720      ---   135112      ---   124602    99064      ---

MAX    100368    69188    50421    46280    79532    79224   107055   137135   141476   140903   123768    97761
MIN     70072    51408    39618    41941    44572    76115    79156   110381   135544   124602    99064    72467
 a    3872.57  3844.41  3827.64  3835.71  3884.35  3884.38  3919.69  3950.91  3957.10  3939.56  3910.19  3875.90
 b     -30342   -18664    -9621    +4493   +32418      +22   +28335   +28057    +5887   -16397   -25538   -26597

CAL YR 1995   MAX 141857  MIN  9966  b +27278
WTR YR 1996   MAX 141476  MIN 39618  b -27947

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