10297000 TOPAZ LAKE NEAR TOPAZ, CA

LOCATION.-Lat 38°41'35", long 119°31'10", in NW 1/4 NE 1/4 sec.33, T.10 N., R.22 E., Douglas County (shown on Mono County map), 
  Hydrologic Unit 16050301, at outlet works of Topaz Lake on West Walker River, and 5.5 mi north of Topaz.
PERIOD OF RECORD.-December 1921 to September 1931 (monthly contents only published in WSP 1734), October 1931 to current year.
GAGE.-Water-stage recorder.  Datum of gage is above sea level.  Prior to Oct. 1, 1978, at datum 4.62 ft higher.
REMARKS.-Topaz Lake, formerly known as Alkali Lake and Topaz Reservoir, was formed by the diversion of water from West Walker River 
  through a feeder canal and the construction of an outlet tunnel through a low saddle in rim of lake.  Storage began about December 1921.  
  Usable capacity, 59,440 acre-ft, between elevations 4,967.68 ft (lowest practical elevation for diversion through tunnel) and 5,000.38 ft (3 ft 
  below top of levee).  Usable capacity of reservoir was increased from about 45,000 acre-ft to 59,440 acre-ft in October 1937 by an earthfill, 
  rock-faced levee at south end.  Figures given herein represent usable contents.  There is 65,000 acre-ft of lake volume below the point of 
  controllable storage.  Water is used for irrigation in 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, 60,680 acre-ft, July 3, 1980, July 10, 1995, elevation 5,000.92 ft, present datum; 
  no usable contents at times in some years.
EXTREMES FOR CURRENT YEAR.-Maximum contents 59,190 acre-ft, June 25, elevation, 5,000.27 ft; minimum contents, 15,760 acre-ft, 
  Sept. 30, elevation 4,977.60 ft  .
  Capacity table, (elevation, in feet, and contents, in acre-feet)
	
	
	
	
	
	
	4,968
	490
	4,980
	19,760
	4,995
	47,540
	4,970
	3,580
	4,985
	28,310
	5,000
	58,570
	4,975
	11,520
	4,990
	37,360
	5,001
	60,870

                   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     22760    20090    27230    37190    42690    33090    47170    45130    52030    58730    47070    27040
   2     22530    20190    27420    42370    43150    33380    47710    44140    52470    58270    46650    26480
   3     22360    20330    27610    47150    43600    33630    48260    43170    53130    57820    46270    25930
   4     22220    20460    27840    48950    44010    33920    48730    42410    54020    57570    45870    25410
   5     22120    20590    28380    49790    43950    34200    49160    41860    54910    57110    45430    24930
 
   6     22030    20710    28660    50390    43370    34450    49380    41410    55130    56660    44950    24420
   7     21910    20880    28900    50780    42800    34730    49380    41010    55360    56440    44410    23870
   8     21810    21050    29200    50980    42240    35000    49380    40630    55810    56210    43850    23340
   9     21710    21220    29390    50940    41650    35300    49380    40410    56260    55760    43270    22810
  10     21590    21370    29900    50280    40910    35600    49380    40590    56710    55310    42760    22240
 
  11     21460    21560    30240    49630    40010    35900    49160    40910    56930    55090    42220    21730
  12     21320    21710    30610    48770    39130    36230    49160    41190    57160    54640    41680    21200
  13     21190    21860    30920    47810    38270    36540    49160    41610    57390    54170    41090    20730
  14     21080    22030    31260    46670    37440    36880    49160    42310    57610    53730    40450    20140
  15     20950    22190    31550    45530    36690    37260    48950    42940    57610    53510    39750    19700
 
  16     20880    22390    31830    44450    35950    37690    49160    43520    57610    53290    39000    19300
  17     20800    22800    32120    43290    35260    38060    49180    44160    57610    52840    38130    18950
  18     20650    23170    32350    42140    34530    38450    49180    44630    57610    52400    37260    18550
  19     20530    23600    32590    40970    33890    38880    49400    44950    57840    51960    36390    18200
  20     20430    23960    32820    39870    33310    39370    49610    45430    57840    51530    35560    17850
 
  21     20330    24370    33380    39210    32690    39890    50260    45740    57840    51090    34820    17550
  22     20260    24830    33650    39470    32190    40390    50480    46100    58070    50650    34140    17250
  23     20190    25210    33800    39550    31810    40930    50260    46520    58520    50410    33380    16980
  24     20040    25520    34030    39450    31670    41530    49830    46980    58980    50200    32690    16750
  25     20070    25830    34310    39790    31900    42140    49400    47430    59190    49760    32050    16540
 
  26     20020    26090    34650    39890    32170    42820    48750    47750    59190    49330    31280    16360
  27     19970    26350    35060    40350    32570    43600    48200    48050    59190    49120    30480    16190
  28     19960    26570    35450    40870    32870    44340    47600    48470    59190    48690    29720    16030
  29     19970    26800    36050    41350      ---    45070    46770    48970    59190    48320    29010    15880
  30     19990    27020    36310    41740      ---    45850    45910    49850    58960    47900    28340    15760
  31     20020      ---    35950    42220      ---    46520      ---    51150      ---    47510    27660      ---
 
 MAX     22760    27020    36310    50980    44010    46520    50480    51150    59190    58730    47070    27040
 MIN     19960    20090    27230    37190    31670    33090    45910    40410    52030    47510    27660    15760
  a    4980.15  4984.26  4989.26  4992.45  4987.58  4994.52  4994.23  4996.68  5001.17  4994.99  4984.63  4977.60
  b      -2980    +7000    +8930    +6270    -9350   +13650     -610    +5240    +7810   -11450   -19850   -11900

 CAL YR 1996   MAX 59900  MIN 19960  b -11580
 WTR YR 1997   MAX 59190  MIN 15760  b  -7240

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