10290500  ROBINSON CREEK AT TWIN LAKES OUTLET, NEAR BRIDGEPORT, CA

LOCATION.--Lat 38°10'20", long 119°19'25", in SE 1/4 SE 1/4 sec.28, T.4 N., R.24 E., Mono County, Hydrologic Unit
   16050301, on left bank, 0.2 mi downstream from Lower Twin Lake, and 8 mi southwest of Bridgeport.
DRAINAGE AREA.--39.1 mi2.
PERIOD OF RECORD.--October 1953 to September 1975, May 1992 to September 1994 (irrigation season only), October
   1994 to current year.
GAGE.--Water-stage recorder. Elevation of gage is 7,050 ft above sea level, from topographic map.
REMARKS.--Records good.  Flow regulated by Upper and Lower Twin Lakes.  No flow for many days in some years.
   These data are reviewed and provided by the Nevada District Office, U.S. Geological Survey.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge known, 660 ft3/s, June 21, 1911, gage height, 5.2 ft, at
   site 2.5 mi downstream.
REVISIONS.--WSP 1927:  Drainage area.

                   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        51       32     10         26       26       31       34      107      126      139      127       71
  2        49       31      9.7       26       25       30       37      116      139      154      123       70
  3        48       31      9.5       27       24       29       36      124      166      178      118       69
  4        45       31      8.6       26       26       30       35      128      212      201      110       67
  5        42       31      8.6       26       34       34       35      129      277      211      105       66

  6        43       31      8.4       25       39       31       34      129      307      213       99       65
  7        41       30      8.5       25       42       30       34      129      315      207       95       64
  8        40       30      8.6       25       43       29       34      131      340      208       91       64
  9        38       29      8.9       25       42       29       36      132      359      216       88       63
 10        37       28     10         24       41       28       39      132      361      223       86       63

 11        38       28     13         23       39       29       41      133      357      226       83       62
 12        36       28     30         23       38       32       44      138      341      230       82       62
 13        35       28     42         23       36       34       45      151      325      229       85       61
 14        35       28     45         22       35       33       46      171      330      221       88       60
 15        35       28     45         25       34       32       48      202      330      212       89       58

 16        35       28     40         27       34       31       54      298      321      204       89       44
 17        35       28     37         29       34       30       57      376      308      194       89       35
 18        34       28     35         30       35       29       59      378      292      179       87       33
 19        32       28     33         32       41       29       58      332      274      164       83       31
 20        32       28     32         30       50       29       55      277      264      152       81       30

 21        31       25     30         31       51       29       52      236      257      143       78       30
 22        31       20     30         29       53       31       50      201      252      137       76       30
 23        31       17     30         28       48       30       48      180      239      135       75       30
 24        32       16     30         28       43       31       50      164      225      134       74       30
 25        31       16     29         27       41       31       50      148      213      136       74       29

 26        32       11     28         26       38       31       56      136      201      136       73       29
 27        32       11     27         29       35       31       68      127      186      136       73       29
 28        32       11     27         30       34       34       81      123      169      135       73       29
 29        32       11     27         29       33       33       91      120      150      135       72       29
 30        32       11     27         27      ---       32       99      119      138      132       72       29
 31        32      ---     26         26      ---       31      ---      121      ---      130       71      ---

TOTAL    1129      733    753.8      829     1094      953     1506     5388     7774     5450     2709     1432
MEAN     36.4     24.4     24.3     26.7     37.7     30.7     50.2      174      259      176     87.4     47.7
MAX        51       32       45       32       53       34       99      378      361      230      127       71
MIN        31       11      8.4       22       24       28       34      107      126      130       71       29
AC-FT    2240     1450     1500     1640     2170     1890     2990    10690    15420    10810     5370     2840

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1954 - 1996, BY WATER YEAR (WY)

MEAN     20.9     8.14     5.59     10.2     14.4     15.7     46.4      104      188      162     98.4     51.1
MAX      37.5     25.0     24.3     39.0     63.4     31.7     79.4      187      349      400      199     89.0
(WY)     1970     1968     1996     1970     1963     1995     1959     1969     1969     1995     1995     1974
MIN      7.00      .67     .000     .000     .000     .000     22.3     59.1     68.2     62.0     35.1     15.9
(WY)     1995     1958     1954     1954     1954     1955     1975     1955     1992     1992     1992     1992

SUMMARY STATISTICS           FOR 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1954 - 1996

ANNUAL TOTAL                       38842.5                    29750.8
ANNUAL MEAN                          106                         81.3                       62.5
HIGHEST ANNUAL MEAN                                                                        100              1995
LOWEST ANNUAL MEAN                                                                          33.8            1961
HIGHEST DAILY MEAN                   587     Jul 10             378     May 18             587       Jul 10 1995
LOWEST DAILY MEAN                      2.0   Jan  1               8.4   Dec  6                .00    Nov  3 1953
ANNUAL SEVEN-DAY MINIMUM               4.3   Jan  1               8.7   Dec  3                .00    Nov  3 1953
INSTANTANEOUS PEAK FLOW                                         402     May 17             608       Jul 10 1995
INSTANTANEOUS PEAK STAGE                                          4.01  May 17               4.62    Jun  6 1969
ANNUAL RUNOFF (AC-FT)              77040                      59010                      45310
10 PERCENT EXCEEDS                   318                        211                        158
50 PERCENT EXCEEDS                    38                         39                         30
90 PERCENT EXCEEDS                    11                         26                           .30