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, 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 October 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 59,900 acre-ft, July 10, elevation, 5,005.20 ft; minimum contents,
   23,000 acre-ft, September 30, elevation 4,986.54 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 1995 TO SEPTEMBER 1996
                                         DAILY OBSERVATION AT 2400 HOURS

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

  1     39230    31780    36030    42920    49530    54910    57520    50740    39830    58980    53350    34010
  2     38860    31800    36120    43120    49740    54710    57520    50520    40460    59210    52910    33380
  3     38470    31900    36290    43310    49960    54710    57520    50310    41630    59210    52250    32800
  4     38090    32070    36400    43500    50630    54710    57750    49660    43190    59210    51590    32210
  5     37730    32230    36580    43640    51280    54930    57980    49230    44680    58980    50940    31760

  6     37400    32370    36730    43850    51940    55180    57980    48770    46180    58980    50280    31330
  7     37070    32530    36880    44010    52600    55180    58180    48170    47860    58980    49640    30910
  8     36770    32680    37010    44200    52820    55180    58410    47510    49640    59210    48770    30480
  9     36500    32820    37170    44360    53290    55400    58640    46810    51150    59670    48030    30020
 10     36200    32980    37300    44530    53510    55420    58640    46140    52470    59900    47220    29580

 11     35900    33130    37490    44700    53730    55650    58640    45640    53570    59900    46440    29060
 12     35610    33270    38470    44820    53950    55870    58410    45530    54460    59670    45760    28480
 13     35410    33430    39000    45010    53950    55870    58160    45720    55360    59440    44950    27910
 14     35190    33600    39370    45130    54170    55900    57700    46010    56030    59210    44160    27380
 15     34980    33740    39570    45300    54200    55900    57250    46410    56480    58980    43410    26900

 16     34730    33890    39810    45700    54200    55900    57020    48560    57160    58980    42690    26450
 17     34450    34030    40030    45930    54200    55900    56800    49200    57610    58750    41980    26090
 18     34160    34180    40270    46350    54200    55900    56350    49420    58300    58520    41310    25790
 19     33910    34320    40460    46560    54640    55920    55650    48770    58750    58520    40670    25600
 20     33670    34470    40690    46730    54860    55920    54980    47830    58980    58070    40110    25450

 21     33400    34620    40830    47010    55110    56140    54310    46770    58980    57840    39650    25310
 22     33110    34750    40990    47200    55110    56140    53420    45620    58750    57610    39130    25140
 23     32870    34890    41210    47370    54890    56390    52760    44450    58750    57390    38660    24950
 24     32660    35040    41370    47450    54890    56390    52290    43210    58980    56930    38210    24680
 25     32460    35150    41530    47860    54660    56620    51850    42180    59210    56710    37750    24380

 26     32320    35320    41700    47980    54690    56620    51630    41130    59440    56480    37340    24090
 27     32210    35470    41860    48690    54690    56870    51630    40450    59440    56030    36880    23800
 28     32080    35600    42080    48690    54910    57090    51420    39830    59210    55580    36390    23510
 29     31980    35750    42220    48900    54910    57090    50980    39490    59210    55130    35780    23240
 30     31850    35900    42470    49100      ---    57320    50960    39430    58980    54690    35190    23000
 31     31740      ---    42710    49310      ---    57320      ---    39510      ---    54020    34600      ---

MAX     39230    35900    42710    49310    55110    57320    58640    50740    59440    59900    53350    34010
MIN     31740    31780    36030    42920    49530    54710    50960    39430    39830    54020    34600    23000
 a    4991.57  4993.85  4997.31  5000.45  5003.00  5004.07  5001.21  4995.72  5004.80  5002.60  4993.15  4986.54
 b      -7870    +4160    +6810    +6600    +5600    -2410    -6360   -11450   +19470    -4960   -19420   -11600

CAL YR 1995   MAX 60680  MIN  8820   b +33970
WTR YR 1996   MAX 59900  MIN 23000   b -16610

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