10293000  EAST WALKER RIVER NEAR BRIDGEPORT, CA

LOCATION.-Lat 38°19'40", long 119°12'50", in SW 1/4 NE 1/4 sec.34, T.6 N., R.25 E., Mono County, Hydrologic Unit 16050301, in Toiyabe National Forest, on right bank, 1,500 ft downstream from Bridgeport Reservoir, 5 mi north of Bridgeport, and 10 mi upstream from Sweetwater Creek.
DRAINAGE AREA.-359 mi2.
PERIOD OF RECORD.-July 1911 to September 1914 (gage height only), October and November 1921, May 1922 to September 1924, March to July 1925, October 1925 to current year.
REVISED RECORDS.-WSP 1927:  Drainage area.
GAGE.-Water-stage recorder. Elevation of gage is 6,400 ft above sea level, from topographic map. Prior to Oct. 1, 1921, nonrecording gage at site 0.5 mi upstream at different datum. Oct. 1, 1921, to Feb. 21, 1924, water-stage recorder at site 1 mi downstream at different datum. Feb. 22, 1924, to Sept. 30, 1931, water-stage recorder, and Oct. 1, 1931, to May 25, 1939, nonrecording gage at present site at datum 2.34 ft lower. May 26, 1939, to Nov. 27, 1988, water-stage recorder at datum 2.00 ft higher.
REMARKS.-No estimated daily discharges. Records good. Diversions for irrigation of meadow pasturelands near Bridgeport. Flow regulated by Bridgeport Reservoir (station 10292500). These data are reviewed and provided by the Nevada District Office, U.S. Geological Survey.
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 1,910 ft3/s, Jan. 4, 1997, gage height, 6.74 ft; minimum daily, 0.20 ft3/s, Nov. 2, 1955.
EXTREMES FOR CURRENT YEAR.-Maximum discharge, 865 ft3/s, July 22, 23, gage height, 5.27 ft; minimum daily, 23 ft3/s, several days in November and December.

                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

                                               DAILY MEAN VALUES
 DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
   1       177       31       29       31       27      214      808      427      402      476      378      424
   2       170       31       26       31       27      242      804      426      371      514      356      423
   3       170       31       23       31       27      257      717      426      372      523      316      406
   4       186       31       23       32       27      240      541      425      372      667      272      383
   5       190       32       23       32       27      228      360      425      373      739      260      382
   6       190       31       23       32       27      227      269      423      373      739      280      371
   7       186       30       23       32       27      227      239      423      374      784      309      356
   8       171       30       23       32       27      227      218      423      374      806      326      341
   9       150       30       24       33       28      193      218      423      376      807      334      276
  10       136       30       27       33       29      150      219      423      377      806      344      228
 
  11       132       30       28       33       27      108      234      422      378      758      379      215
  12       125       30       27       33       30       91      266      423      380      733      406      214
  13       110       26       26       33       27       91      266      437      442      688      404      214
  14        81       24       23       33       27       91      266      460      499      663      402      229
  15        85       23       23       33       28       91      267      484      499      573      400      245
  16        92       23       23       33       30       91      267      492      501      526      399      208
  17       104       23       24       33       27       92      266      491      504      529      398      175
  18       102       23       24       33       51      136      298      490      593      689      375      167
  19        99       23       28       33       60      248      329      489      640      771      334      177
  20        95       25       26       33       74      419      328      488      642      771      322      191
 
  21        90       30       25       33       96      639      343      488      554      718      305      181
  22        85       30       28       33      117      537      366      487      510      799      307      166
  23        68       29       31       33      141      500      405      486      471      852      328      162
  24        51       29       31       33      150      562      430      485      451      740      328      155
  25        51       29       31       33      174      686      430      484      375      689      343      155
  26        51       30       31       33      188      729      430      484      336      688      388      153
  27        51       30       31       33      204      786      429      445      338      509      391      150
  28        51       29       31       33      214      818      428      425      339      418      376      149
  29        52       29       31       33      ---      818      428      426      380      474      396      130
  30        52       29       31       29      ---      813      428      426      433      465      425       66
  31        38      ---       31       27      ---      808      ---      426      ---      428      425      ---
 
 TOTAL    3391      851      828     1002     1938    11359    11297    13982    13029    20342    11006     7092
 MEAN      109     28.4     26.7     32.3     69.2      366      377      451      434      656      355      236
 MAX       190       32       31       33      214      818      808      492      642      852      425      424
 MIN        38       23       23       27       27       91      218      422      336      418      260       66
 AC-FT    6730     1690     1640     1990     3840    22530    22410    27730    25840    40350    21830    14070
 
 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1922 - 1998, BY WATER YEAR (WY)                                 
 
 MEAN     61.0     28.2     37.6     46.6     50.6     90.7      178      261      313      304      242      155
 MAX       301      325      398      804      345      417      721      880     1001      797      638      406
 (WY)     1984     1983     1984     1997     1997     1983     1952     1938     1938     1967     1983     1983
 MIN      7.35     1.10     2.50      .50      .62     5.39     27.5     57.5     36.0     20.4     13.3     17.1
 (WY)     1931     1956     1960     1950     1950     1927     1961     1991     1924     1924     1924     1977
 
 SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1922 - 1998
 
 ANNUAL TOTAL                      112863                      96117                                             
 ANNUAL MEAN                          309                        263                        148                  
 HIGHEST ANNUAL MEAN                                                                        443              1983
 LOWEST ANNUAL MEAN                                                                          37.5            1931
   HIGHEST DAILY MEAN                  1880     Jan  4             852     Jul 23            1880       Jan  4 1997
   LOWEST DAILY MEAN                     23     Nov 15              23     Nov 15                .20    Nov  2 1955
   ANNUAL SEVEN-DAY MINIMUM              23     Dec  3              23     Dec  3                .20    Nov  2 1955
   INSTANTANEOUS PEAK FLOW                                         865     Jul 22            1910       Jan  4 1997
   INSTANTANEOUS PEAK STAGE                                          5.27  Jul 22               6.74    Jan  4 1997
 ANNUAL RUNOFF (AC-FT)             223900                     190600                     106900                  
 10 PERCENT EXCEEDS                   636                        557                        349                  
 50 PERCENT EXCEEDS                   268                        219                         95                  
 90 PERCENT EXCEEDS                    30                         27                          7.0