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, 6,229.40 ft, Jan. 4; minimum, 6,227.21 ft, Nov. 16. 
  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 1996 TO SEPTEMBER 1997

                                        DAILY OBSERVATION AT 2400 HOURS
DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

  1      7.87     7.41     7.61     8.77     9.10     8.17     7.80     8.23     8.89     8.90     8.65     8.12
  2      7.86     7.38     7.62     9.24     9.06     8.16     7.79     8.24     8.90     8.91     8.63     8.11
  3      7.86     7.37     7.62     9.35     9.10     8.09     7.79     8.26     8.91     8.90     8.62     8.11
  4      7.83     7.35     7.68     9.40     9.05     8.04     7.78     8.28     8.99     8.89     8.62     8.10
  5      7.84     7.33     7.78     9.35     9.01     8.01     7.78     8.30     9.01     8.89     8.61     8.10

  6      7.83     7.31     7.85     9.32     8.97     7.97     7.79     8.33     9.01     8.88     8.61     8.07
  7      7.84     7.31     7.85     9.31     8.92     7.94     7.79     8.35     9.02     8.88     8.59     8.06
  8      7.83     7.32     7.86     9.27     8.92     7.91     7.79     8.37     9.06     8.88     8.58     8.06
  9      7.81     7.31     7.86     9.26     8.88     7.88     7.80     8.41     9.06     8.84     8.56     8.03
 10      7.81     7.31     7.98     9.23     8.85     7.86     7.81     8.43     9.05     8.85     8.52     7.99

 11      7.79     7.29     8.10     9.18     8.82     7.83     7.81     8.47     9.04     8.82     8.53     7.99
 12      7.79     7.30     8.14     9.18     8.77     7.79     7.81     8.51     9.04     8.83     8.50     7.98
 13      7.76     7.26     8.10     9.12     8.73     7.76     7.82     8.54     9.05     8.83     8.50     7.95
 14      7.74     7.33     8.07     9.04     8.7      7.74     7.83     8.56     9.08     8.83     8.49     7.92
 15      7.72     7.27     8.06     9.07     8.67     7.70     7.85     8.59     9.10     8.81     8.46     7.88
 
 16      7.72     7.21     8.02     9.04     8.65     7.69     7.86     8.62     9.08     8.80     8.44     7.87
 17      7.69     7.43     7.99     9.03     8.62     7.66     7.87     8.65     9.06     8.79     8.42     7.85
 18      7.65     7.46     7.96     8.97     8.58     7.66     7.88     8.69     9.06     8.76     8.39     7.80
 19      7.62     7.51     7.94     8.94     8.54     7.67     7.94     8.70     9.04     8.76     8.39     7.82
 20      7.60     7.48     7.97     8.94     8.5      7.69     7.96     8.70     9.02     8.75     8.37     7.79

 21      7.56     7.56     8.20     8.93     8.47     7.69     8.00     8.72     9.00     8.75     8.34     7.76
 22      7.55     7.63     8.23     9.10     8.45     7.70     8.04     8.72     9.00     8.73     8.32     7.75
 23      7.53     7.64     8.21     9.08     8.39     7.71     8.05     8.76     9.00     8.73     8.28     7.75
 24      7.51     7.62     8.15     9.06     8.35     7.72     8.10     8.77     8.98     8.72     8.27     7.73
 25      7.52     7.67     8.14     9.26     8.29     7.74     8.11     8.79     9.00     8.72     8.27     7.73

 26      7.49     7.65     8.22     9.29     8.27     7.75     8.13     8.79     8.98     8.71     8.23     7.72
 27      7.48     7.65     8.20     9.25     8.26     7.75     8.13     8.83     8.96     8.70     8.21     7.70
 28      7.47     7.61     8.20     9.23     8.24     7.77     8.16     8.83     8.94     8.70     8.20     7.67
 29      7.46     7.63     8.25     9.20      ---     7.78     8.20     8.85     8.92     8.69     8.16     7.65
 30      7.44     7.60     8.30     9.18      ---     7.78     8.22     8.86     8.94     8.68     8.15     7.64
 31      7.43      ---     8.41     9.14      ---     7.79      ---     8.86      ---     8.67     8.14      ---

MEAN     7.67     7.44     8.02     9.15     8.68     7.82     7.92     8.58     9.01     8.79     8.42     7.89
MAX      7.87     7.67     8.41     9.40     9.10     8.17     8.22     8.86     9.10     8.91     8.65     8.12
MIN      7.43     7.21     7.61     8.77     8.24     7.66     7.78     8.23     8.89     8.67     8.14     7.64
 a    539,500  560,300  659,700  749,500  638,800  583,600  636,400  715,100  724,900  691,700  626,500  565,200
 b     -52600   +20800   +99400   +89800  -110700   -55200   +52800   +78700    +9800   -33200   -65200   -61300

CAL YR 1996  MEAN 7.99  MAX 9.09  MIN 6.02  b +290000
WTR YR 1997  MEAN 8.28  MAX 9.40  MIN 7.21  b  -26900