10337000  LAKE TAHOE AT TAHOE CITY, CA

LOCATION.--Lat 39°10'51", long 120°07'06", in NE 1/4 NE 1/4 sec.5, T.15 N., R.17 E., Placer County, Hydrologic
   Unit 16050101, on U.S. Coast Guard pier at Lake Forest, 1.1 mi northeast of Tahoe City, and 1.8 mi northeast
   of Lake Tahoe outlet dam on Truckee River at Tahoe City.
DRAINAGE AREA.--506 mi2, at lake outlet.
PERIOD OF RECORD.--April 1900 to current year.  Monthend elevations only for October 1943 to September 1957,
   published in WSP 1734.  Prior to October 1961, published as "at Tahoe."
  CHEMICAL DATA:  Water year 1969, bimonthly; 1978, biannually; 1979, annually.
REVISED RECORDS.--WDR CA-78-3:  Drainage area.
GAGE.--Water-stage recorder.  Datum of gage is 6,220.00 ft above U.S. Bureau of Reclamation datum, 6,218.86 ft
   above sea level.  Prior to Oct. 1, 1957, nonrecording gages at several sites near outlet of lake at same datum
   except for water years 1907 and 1908, which were at a datum 5.5 ft higher.  Oct. 1, 1957, to May 8, 1958,
   water-stage recorder on left wingwall of dam at outlet of lake at same datum.  May 9, 1958, to Sept. 30, 1968,
   water-stage recorder on pier, 1,000 ft east of dam at lake outlet.
REMARKS.--Lake levels regulated by a 17-gate concrete dam at outlet of lake; storage began about 1874.  Monthly
   figures given represent usable contents.  Usable capacity, 744,600 acre-ft between elevations 6,223 ft,
   natural rim of lake, and 6,229.1 ft, maximum permissible elevation by Federal Court decree.  Lake elevations
   are referred to U.S. Bureau of Reclamation datum because that datum is used as the official reference point by
   all local, State, and Federal agencies.  There are minor diversions for domestic purposes, irrigation, and
   power.  See schematic diagram of Truckee River basin.
EXTREMES FOR PERIOD OF RECORD.--Maximum elevation, 6,231.26 ft, July 14, 15, 17, 18, 1907; minimum, 6,220.26 ft,
   Nov. 30, 1992.
EXTREMES FOR CURRENT YEAR.--Maximum elevation, 6,229.09 ft, June 25; minimum, 6,225.63 ft, Dec. 10.

                           Capacity table (elevation, in feet, and contents, in acre-feet)
                             (Based on topographic information available in April 1959)

                                      6,223         0          6,227     486,800
                                      6,224   121,400          6,228     609,300
                                      6,225   243,000          6,229.1   744,600
                                      6,226   364,800

                          GAGE HEIGHT, 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      6.37     5.93     5.68     6.05     6.68     7.58     8.00     8.29     8.87     9.03     8.85     8.39
  2      6.33     5.93     5.68     6.03     6.67     7.58     8.00     8.28     8.88     9.03     8.80     8.39
  3      6.31     5.89     5.68     6.03     6.69     7.65     8.00     8.28     8.88     9.02     8.80     8.36
  4      6.31     5.89     5.67     6.05     6.89     7.76     8.00     8.32     8.91     8.99     8.75     8.34
  5      6.29     5.86     5.67     6.03     6.94     7.79     8.03     8.33     8.94     9.02     8.73     8.26

  6      6.23     5.86     5.65     6.04     6.98     7.79     8.03     8.32     8.94     9.03     8.73     8.28
  7      6.21     5.82     5.68     6.03     6.99     7.78     8.03     8.32     8.95     9.02     8.71     8.23
  8      6.21     5.82     5.66     6.03     6.99     7.81     8.02     8.30     8.96     9.02     8.71     8.24
  9      6.20     5.82     5.65     6.02     7.02     7.83     8.03     8.31     8.97     9.03     8.71     8.21
 10      6.21     5.79     5.63     6.02     7.03     7.85     8.05     8.32     8.99     9.03     8.68     8.19

 11      6.20     5.79     5.80     6.04     7.04     7.87     8.05     8.36     9.01     9.04     8.67     8.18
 12      6.18     5.79     6.02     6.04     7.04     7.92     8.04     8.36     9.01     9.04     8.66     8.16
 13      6.15     5.80     6.05     6.05     7.05     7.90     8.06     8.42     9.04     9.01     8.69     8.13
 14      6.13     5.80     6.05     6.04     7.06     7.93     8.06     8.44     9.04     9.03     8.65     8.07
 15      6.13     5.78     6.11     6.05     7.07     7.89     8.07     8.55     9.04     8.99     8.68     8.08

 16      6.09     5.78     6.12     6.17     7.09     7.90     8.17     8.71     9.03     9.00     8.66     8.06
 17      6.11     5.77     6.08     6.18     7.12     7.90     8.22     8.80     9.04     8.95     8.63     8.06
 18      6.11     5.77     6.06     6.28     7.17     7.90     8.22     8.83     9.04     8.97     8.62     8.00
 19      6.11     5.76     6.09     6.29     7.31     7.91     8.21     8.86     9.04     8.93     8.60     8.01
 20      6.10     5.76     6.06     6.31     7.37     7.91     8.23     8.85     9.06     8.95     8.57     7.99

 21      6.05     5.75     6.05     6.37     7.48     7.93     8.23     8.83     9.05     8.94     8.58     7.98
 22      6.02     5.74     6.07     6.37     7.48     7.96     8.23     8.84     9.04     8.95     8.56     7.97
 23      6.03     5.73     6.05     6.43     7.51     7.95     8.24     8.83     9.03     8.93     8.56     7.94
 24      5.98     5.72     6.04     6.60     7.55     7.93     8.24     8.83     9.03     8.93     8.54     7.93
 25      5.98     5.71     6.03     6.57     7.59     7.95     8.24     8.82     9.09     8.91     8.52     7.92

 26      5.99     5.73     6.04     6.57     7.58     7.91     8.26     8.80     9.08     8.91     8.50     7.91
 27      5.99     5.71     6.04     6.70     7.59     7.95     8.27     8.83     9.08     8.88     8.47     7.90
 28      5.98     5.70     6.04     6.70     7.58     7.96     8.27     8.81     9.06     8.89     8.49     7.90
 29      5.98     5.70     6.04     6.68     7.58     7.98     8.27     8.85     9.05     8.87     8.45     7.89
 30      5.96     5.70     6.05     6.69      ---     7.98     8.28     8.84     9.04     8.86     8.44     7.86
 31      5.94      ---     6.04     6.68      ---     7.95      ---     8.87      ---     8.86     8.42      ---

MEAN     6.13     5.79     5.92     6.26     7.18     7.87     8.13     8.59     9.01     8.97     8.63     8.09
MAX      6.37     5.93     6.12     6.70     7.59     7.98     8.28     8.87     9.09     9.04     8.85     8.39
MIN      5.94     5.70     5.63     6.02     6.67     7.58     8.00     8.28     8.87     8.86     8.42     7.86
 a    357,500  328,300  369,700  447,800  557,800  603,200  643,700  716,300  737,200  715,100  661,000  592,100
 b    -52,400  -29,200  +41,400  +78,100 +110,000  +45,400  +40,500  +72,600  +20,900  -22,100  -54,100  -68,900

CAL YR 1995   MEAN 4.96  MAX 6.99  MIN 1.26  b +369,700
WTR YR 1996   MEAN 7.55  MAX 9.09  MIN 5.63  b +182,100

  a Usable contents, in acre-feet, at end of month.
  b Change in contents, in acre-feet.
  NOTE.--Add 6,220 ft to obtain elevation, U.S. Bureau of Reclamation datum, at 2400 hours.