10292500  BRIDGEPORT RESERVOIR NEAR BRIDGEPORT, CA

LOCATION.-Lat 38°19'30", long 119°12'40", in SE 1/4 NE 1/4 sec.34, T.6 N., R.25 E., Mono County, Hydrologic Unit 16050301, in Toiyabe National Forest, at Bridgeport Dam on East Walker River, and 4.5 mi north of Bridgeport.
DRAINAGE AREA.-358 mi2.
PERIOD OF RECORD.-March 1926 to current year.  Monthend contents only for some periods, published in WSP 1314.
REVISED RECORDS.-WSP 1180:  1949.  WSP 1927:  Drainage area.
GAGE.-Water-stage recorder.  Datum of gage is 6,466.44 ft above sea level (project datum).
REMARKS.-Reservoir is formed by earthfill, rock-faced dam.  Storage began Dec. 8, 1923.  Dam completed in November 1924.  Capacity, 42,460 acre-ft between elevations 6,415 ft, approximate elevation of bottom of reservoir, and 6,461 ft.  Crest of spillway is at elevation 6,460.75 ft; however, there are four siphons that become operative prior to reaching this spillway.  Elevation of sill of outlet gate, 6,412 ft.  No dead storage.  Figures given herein represent total contents.  Water is used for irrigation by Walker River Irrigation District.  These data are reviewed and provided by the Nevada District Office, U.S. Geological Survey.
EXTREMES FOR PERIOD OF RECORD.-Maximum contents, 44,880 acre-ft, June 16, 1974, elevation 6,460.78 ft; no contents at times in water years 1929, 1930, 1960, 1977, 1988, and 1989.
EXTREMES FOR CURRENT YEAR.-Maximum contents, 42,880 acre-ft, Aug. 8, elevation, 6,460.14 ft; minimum 17,000 acre-ft, Oct. 13, elevation, 6,448.96 ft.
  Capacity table, (elevation, in feet, and contents, in acre-feet)					
	6,425		334		6,440		6,240		6,455		29,160
	6,430		1,130		6,445		11,380		6,460		42,460
	6,435		2,920		6,450		18,780		6,461		45,490

                   RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

                                        DAILY OBSERVATION AT 2400 HOURS
 DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
   1     18660    18130    22750    27640    34080    38540    35220    28910    21560    37320    42340    33700
   2     18490    18250    22910    27920    34560    38320    34190    28840    21500    37870    42370    33140
   3     18370    18350    23080    28010    34930    38070    33370    28750    21540    38540    42430    32610
   4     18210    18470    23250    28220    35220    37840    32810    28630    21540    38960    42640    32180
   5     18010    18590    23520    28360    35440    37620    32590    28840    21560    39260    42730    31770
 
   6     17780    18690    23700    28470    35700    37510    32540    29070    21700    39540    42760    31500
   7     17610    18850    23930    28610    36100    37260    32510    29280    22030    39690    42760    31210
   8     17470    18980    24100    28790    36470    37010    32540    29550    22360    39890    42820    30940
   9     17350    19130    24260    28910    36710    36870    32540    29640    22790    40180    42790    30800
  10     17210    19280    24390    29050    36950    36820    32540    29430    23270    40390    42700    30750
 
  11     17150    19460    24510    29210    37230    36820    32480    29300    23830    40680    42490    30850
  12     17080    19630    24600    29450    37460    36900    32310    29110    24540    40880    42230    30900
  13     17060    19790    24790    29670    37680    36950    32150    28860    25120    41030    41910    30870
  14     17090    19880    24970    29830    38090    37070    31950    28560    25520    41230    41610    30800
  15     17110    20010    25140    30120    38260    37180    31750    28170    25980    41470    41260    30630
 
  16     17150    20140    25340    30510    38460    37340    31500    27850    26550    41760    40910    30580
  17     17150    20270    25520    30900    38680    37540    31330    27370    27250    42050    40530    30580
  18     17130    20550    25690    31470    38870    37730    31060    26880    27730    42110    40180    30530
  19     17130    20560    25870    31700    39040    37710    30850    26380    28170    42080    39890    30480
  20     17150    20720    25960    31950    39230    37430    30700    25910    28610    42110    39660    30360
 
  21     17130    20840    26220    32130    39260    36730    30510    25410    28880    42200    39320    30290
  22     17200    20910    26290    32360    39230    36820    30390    24920    29350    42260    39010    30220
  23     17150    21130    26400    32540    39290    38460    30410    24490    30220    42170    38650    30170
  24     17300    21270    26550    32740    39230    39830    30200    24040    31000    42200    38320    30080
  25     17400    21420    26680    32970    39120    40150    29930    23680    31820    42170    37840    30150
 
  26     17490    21760    26790    32990    39040    40010    29640    23310    32820    42050    37260    30080
  27     17590    21990    26910    33200    38900    39600    29350    22980    33600    42170    36550    30460
  28     17680    22170    27040    33420    38730    38870    29140    22620    34640    42340    36100    30630
  29     17770    22360    27160    33600      ---    37960    28980    22360    35700    42340    35540    30780
  30     17830    22520    27320    33700      ---    36980    28910    22090    36710    42340    34900    31280
  31     17990      ---    27480    33910      ---    36150      ---    21800      ---    42370    34300      ---
 
 MAX     18660    22520    27480    33910    39290    40150    35220    29640    36710    42370    42820    33700
 MIN     17060    18130    22750    27640    34080    36150    28910    21800    21500    37320    34300    30080
 a     6450.67  6454.54  6456.19  6456.07  6453.88  6456.58  6456.57  6457.44  6459.56  6459.76  6454.41  6450.00
 b        -350    +8090    +3950     -300    -5150    +6440      -20    +2260    +5900     +580   -13960    -9020
 CAL YR 1997   MAX 43340  MIN 17060  b  -4570
 WTR YR 1998   MAX 42820  MIN 17060  b +12500
     a  Elevation, in feet above sea level, at end of month.
     b  Change in contents, in acre-feet.