10259100  WHITEWATER RIVER AT RANCHO MIRAGE, CA

LOCATION.--Lat 33°44'58", long 116°25'19", in NW 1/4 SW 1/4 sec.12, T.5 S., R.5 E., Riverside County, Hydrologic
   Unit 18100200, on right bank 0.2 mi upstream from Magnesia Spring Canyon storm channel and 2.7 mi northwest of
   the intersection of Highways 111 and 74.

DRAINAGE AREA.--588 mi2.

PERIOD OF RECORD.--March 1989 to current year.

REVISED RECORDS.--WDR CA-93-1:  1989-92(M).  WDR CA-95-1:  1993, 1993(M).

GAGE.--Water-stage recorder and concrete control.  Elevation of gage is 230 ft above sea level, from topographic
   map.

REMARKS.--Records good.  No regulation upstream from station.  Water diverted from tributary streams for
   municipal supply in vicinity of Palm Springs.  Water from the Colorado River basin is imported for ground-
   water recharge and irrigation.  See schematic diagram of Salton Sea basin.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 9,060 ft3/s, Jan. 7, 1993, gage height, 5.93 ft, from rating
   curve extended above 1,460 ft3/s on basis of critical depth computations; no flow for many days in each year.


                  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       .00      .00      .00      .00      .30      .00      .00      .00      .00      .00      .00      .00
  2       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
  3       .15      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
  4       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
  5       .23      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00

  6       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
  7       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
  8       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
  9       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 10       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00

 11       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 12       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 13       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 14       .00      .00      .00      .00      .00      .02      .00      .00      .00      .00      .00      .00
 15       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00

 16       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 17       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 18       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 19       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 20       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00

 21       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 22       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 23       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 24       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 25       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00

 26       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 27       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 28       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 29       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 30       .00      .00      .00      .00      ---      .00      .00      .00      .00      .00      .00      .00
 31       .00      ---      .00      .00      ---      .00      ---      .00      ---      .00      .00      ---

TOTAL    0.38     0.00     0.00     0.00     0.30     0.02     0.00     0.00     0.00     0.00     0.00     0.00
MEAN     .012     .000     .000     .000     .010     .001     .000     .000     .000     .000     .000     .000
MAX       .23      .00      .00      .00      .30      .02      .00      .00      .00      .00      .00      .00
MIN       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
AC-FT      .8      .00      .00      .00       .6      .04      .00      .00      .00      .00      .00      .00



                           10259100  WHITEWATER RIVER AT RANCHO MIRAGE, CA--Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 1996, BY WATER YEAR (WY)

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

MEAN     .005     .004     .041     47.0     8.84     10.8     .052     .035     .005     .004      .14      .20
MAX      .016     .021      .18      310     52.3     66.0      .21      .27     .041     .026      .78     1.30
(WY)     1993     1990     1993     1993     1993     1995     1993     1993     1994     1991     1989     1995
MIN      .000     .000     .000     .000     .010     .000     .000     .000     .000     .000     .000     .000
(WY)     1990     1991     1994     1994     1996     1990     1989     1989     1989     1989     1990     1989

SUMMARY STATISTICS           FOR 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1989 - 1996

ANNUAL TOTAL                        2840.81                       0.70
ANNUAL MEAN                            7.78                        .002                      5.62
HIGHEST ANNUAL MEAN                                                                         30.4            1993
LOWEST ANNUAL MEAN                                                                            .002          1996
HIGHEST DAILY MEAN                  1160     Mar  6                .30  Feb  1            2950       Jan 16 1993
LOWEST DAILY MEAN                       .00  Jan  1                .00  Oct  1                .00    Mar 30 1989
ANNUAL SEVEN-DAY MINIMUM                .00  Jan 17                .00  Oct  6                .00    Mar 30 1989
INSTANTANEOUS PEAK FLOW                                           2.4   Feb  1            9060       Jan  7 1993
INSTANTANEOUS PEAK STAGE                                          1.13  Feb  1               5.93    Jan  7 1993
ANNUAL RUNOFF (AC-FT)               5630                          1.4                     4070
10 PERCENT EXCEEDS                      .02                        .00                        .00
50 PERCENT EXCEEDS                      .00                        .00                        .00
90 PERCENT EXCEEDS                      .00                        .00                        .00