10337500 TRUCKEE RIVER AT TAHOE CITY, CA

LOCATION.-Lat 39°09'59", long 120°08'36", in NE 1/4 NW 1/4 sec.7, T.15 N., R.17 E., Placer County, Hydrologic Unit 16050102, on left bank 
  510 ft downstream from dam at outlet of Lake Tahoe at Tahoe City. 
DRAINAGE AREA.-507 mi2. 
PERIOD OF RECORD.-July 1895 to February 1896, March 1900 to current year. Monthly discharge only for some periods, published in 
WSP 1314 and 1734. Prior to October 1961, published as "at Tahoe." 
  WATER TEMPERATURE: June 1993 to September 1994. 
REVISED RECORDS.-WDR CA-78-3: Drainage area. 
GAGE.-Water-stage recorder. Datum of gage is 6,216.59 ft above sea level. Prior to Nov. 12, 1912, nonrecording gage at site 370 ft upstream at 
  different datum. Nov. 12, 1912, to Sept. 30, 1937, nonrecording gage; Oct. 1, 1937, to Aug. 21, 1957, water-stage recorder at datum 2.26 ft 
  higher; and Aug. 22, 1957, to July 10, 1960, at datum 2.42 ft higher; all at site 270 ft upstream. 
REMARKS.-Records good including estimated daily discharges. Flow completely regulated by dam at outlet of Lake Tahoe (station 10337000), 
  510 ft upstream. There are several diversions for irrigation, power, and domestic water supply. In addition, sewer effluent is pumped from the 
  Lake Tahoe Basin. See schematic diagram of Truckee River Basin. 
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 2,690 ft3/s, Jan. 2, 1997, gage height, 9.59 ft; no flow for parts of many years. 

                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997

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

  1        37      304       65     2330     2560     2170       75       71       71      205      286      303
  2        50      304      e61     2610     2550     2150       72       72       70      249      286      303
  3       e51      302       60     2630     2540     2140       68       72       71      282      286      303
  4       e51      302       60     2630     2520     2130       68       72       71      301      296      303
  5        47      299       71     2630     2500     2120       68       72       71      299      322      303

  6       e50      311       62     2630     2490     2100       68       72       69      298      314      303
  7       e50      318       61     2620     2470     2090       68       71       70      297      313      303
  8       e50      318       62     2600     2470     2080       67       71      240      297      308      303
  9       e50      323       54     2590     2450     2060       68       71      683      297      306      303
 10       e50      327       53     2580     2440     2050       67       70      892      297      308      303

 11       e50      327      148     2580     2420     2040       67       71      955      294      308      301
 12       e49      327     1130     2570     2410     2030       67       71      866      291      309      302
 13       e49      327     1850     2560     2390     2010       68       71      692      291      308      302
 14       e49      327     1960     2550     2380     2000       68       70      908      290      307      300
 15       e49      327     1950     2540     2360     1990       67       69     1030      287      307      299

 16       e49      327     1970     2530     2350     1970       66       69     1240      287      307      300
 17        49      237     1990     2520     2340     1900       64       70     1240      287      307      298
 18        94       88     1970     2510     2330      874       64       70     1240      287      307      304
 19       155       65     1570     2490     2320      200       63       71     1220      284      306      316
 20       174       64     1310     2490     2300      105       62       71      913      284      306      314

 21       172       65     1780     2490     2290      111       64       71      562      286      306      313
 22       172       67     1980     2510     2280      105       62       71      380      289      306      314
 23       173       67     2090     2520     2270      103       63       72      270      291      305      314
 24       173       66     2140     2510     2250      103       61       72      241      293      305      313
 25       196       65     2120     2570     2220       88       60       70      182      293      304      314

 26       214       64     2110     2620     2210       81       65       70      142      292      304      303
 27       218       64     2140     2620     2200       81       74       70       77      291      304      292
 28       265       63     2120     2610     2190       80       73       71      125      291      303      289
 29       301       63     2140     2600      ---       78       71       71      171      292      304      273
 30       302       62     2150     2580      ---       77       71       70      183      289      303      204
 31       302      ---     2180     2570      ---       76      ---       70      ---      287      303      ---

TOTAL    3741     6170    39407    79390    66500    37192     2009     2195    14945     8898     9444     8995
MEAN      121      206     1271     2561     2375     1200     67.0     70.8      498      287      305      300
MAX       302      327     2180     2630     2560     2170       75       72     1240      301      322      316
MIN        37       62       53     2330     2190       76       60       69       69      205      286      204
AC-FT    7420    12240    78160   157500   131900    73770     3980     4350    29640    17650    18730    17840  

    e Estimated.


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1909 - 1997, BY WATER YEAR (WY)                                 

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

MEAN      181      197      232      242      288      251      168      158      223      273      313      266
MAX       413     1575     2209     2561     2375     2235     1806     1746     1673     1071      638      687
(WY)     1910     1983     1984     1997     1997     1986     1983     1958     1969     1983     1918     1983
MIN      .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000
(WY)     1932     1927     1925     1925     1925     1925     1919     1919     1921     1931     1931     1931

SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1909 - 1997

ANNUAL TOTAL                      160752                     278886                                             
ANNUAL MEAN                          439                        764                        230                  
HIGHEST ANNUAL MEAN                                                                       1150              1983
LOWEST ANNUAL MEAN                                                                            .15           1994
HIGHEST DAILY MEAN                  2210     May 21            2630     Jan  3            2630       Jan  3 1997
LOWEST DAILY MEAN                     37     Oct  1              37     Oct  1                .00    Jan  4 1914
ANNUAL SEVEN-DAY MINIMUM              44     Mar  5              48     Oct  1                .00    Jan 23 1914
INSTANTANEOUS PEAK FLOW                                        2690     Jan  2            2690       Jan  2 1997
INSTANTANEOUS PEAK STAGE                                          9.59  Jan  2               9.59    Jan  2 1997
ANNUAL RUNOFF (AC-FT)             318900                     553200                     166800                  
10 PERCENT EXCEEDS                  1050                       2480                        471                  
50 PERCENT EXCEEDS                   253                        299                        134                  
90 PERCENT EXCEEDS                    49                         64                           .00