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 fair including estimated daily discharges.  Stage-discharge relation affected by beaver dams
   and ice.  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, 2,630 ft3/s, June 19, 1969, gage height, 9.32 ft; no flow for
   parts of many years.


                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
                                               DAILY MEAN VALUES

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

  1        55       46       97       42       47       56      569     1030      698      781      249      253
  2        46       46      131       42       53       57      542     1030      698      576      249      253
  3        48       46      215       42       55       58      501     1030      669      350      248      254
  4        47       46      243       44       56       51      501     1030      566      390      249      254
  5        48       46      223       48       40       44      502     1030      586      393      250      254

  6        49       46      198       48       52       44      504     1020      588      271      250      253
  7        49       48      197       48       51       44      506     1020      607      199      250      254
  8        49       49      196       48       52       44      514     1020      827      198      251      254
  9        49       49      195       48       53       43      462     1020      841      112      252      253
 10        50       48      194       48       54       43      391      879      622      186      251      255

 11        50       48      173       48       56       44      386      549      466      210      252      256
 12        49       49      103       48       56       44      407      536      468      198      254      255
 13        49       49       46       48       55       79      411      560      470      214      252      256
 14        49       50       45       48       56      280      414      617      471      220      247      258
 15        49       50       44       49       56      473      416      623      471      221      248     e258

 16        49       50       44       53       58      545      426     1150      471      219      248      257
 17        49       50       44       50       61      550      424     1610      470      221      248     e257
 18        49       50       44       50       60      584      605     1610      470      223      249     e256
 19        49       50       45       49       64      575      763     1880      296      218      250      255
 20        49       51       45       49       62      554      766     2100      192      221      250      254

 21        49       51       45       49       59      555      767     2210      191      223      251     e256
 22        48       50       46       49       59      559      767     2160      191      221      251      256
 23        47       48       44       49       58      560      768     1700      191      216      250     e257
 24        48       48       44      e49       57      560      809     1640      117      217      251     e257
 25        48       63       44      e49       57      561     1000     1630      206      219      253      256

 26        48      108       44       49       57      560     1030     1630      828      250      254      257
 27        49      105       44      e49       57      561     1040     1480     1020      247      253     e257
 28        49      103       45      e49       57      567     1040     1220     1370      248      252      256
 29        49      101      e44       48       57      565     1040     1060     1360      249      253     e256
 30        50       99      e44       47      ---      565     1030      888      993      249      254      179
 31        49      ---       44       48      ---      566      ---      698      ---      249      254      ---

TOTAL    1515     1743     3010     1485     1615    10391    19301    37660    17414     8209     7773     7586
MEAN     48.9     58.1     97.1     47.9     55.7      335      643     1215      580      265      251      253
MAX        55      108      243       53       64      584     1040     2210     1370      781      254      258
MIN        46       46       44       42       40       43      386      536      117      112      247      179
AC-FT    3010     3460     5970     2950     3200    20610    38280    74700    34540    16280    15420    15050

  e Estimated.


                              10337500  TRUCKEE RIVER AT TAHOE CITY, CA--Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1909 - 1996, BY WATER YEAR (WY)

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

MEAN      181      197      220      216      265      241      170      159      220      273      313      266
MAX       413     1575     2209     2088     1767     2235     1806     1746     1673     1071      638      687
(WY)     1910     1983     1984     1984     1983     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 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1909 - 1996

ANNUAL TOTAL                       17477.00                  117702
ANNUAL MEAN                           47.9                      322                        224
HIGHEST ANNUAL MEAN                                                                       1150              1983
LOWEST ANNUAL MEAN                                                                            .15           1994
HIGHEST DAILY MEAN                   243     Dec  4            2210     May 21            2620       Jun 20 1969
LOWEST DAILY MEAN                       .00  Jan  1              40     Feb  5                .00    Jan  4 1914
ANNUAL SEVEN-DAY MINIMUM                .20  Jan 21              43     Dec 29                .00    Jan 23 1914
INSTANTANEOUS PEAK FLOW                                        2350     May 21            2630       Jun 19 1969
INSTANTANEOUS PEAK STAGE                                          9.07  May 21               9.32    Jun 19 1969
ANNUAL RUNOFF (AC-FT)              34670                     233500                     162400
10 PERCENT EXCEEDS                    78                        832                        468
50 PERCENT EXCEEDS                    49                        220                        133
90 PERCENT EXCEEDS                      .26                      46                           .00