10257720  CHINO CANYON CREEK BELOW TRAMWAY, NEAR PALM SPRINGS, CA

LOCATION.--Lat 33°50'39", long 116°36'16", in NW 1/4 NE 1/4 sec.7, T.4 S., R.4 E., Riverside County, Hydrologic
   Unit 18100200, on left bank 0.5 mi downstream from tram building, 3.5 mi west of Highway 111 on road leading
   to Palm Springs aerial tramway, and 5.5 mi west of Palm Springs.

DRAINAGE AREA.--4.71 mi2.

                                             WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1986 to current year.

REVISED RECORDS.--WDR CA-89-1:  1987(M).

GAGE.--Water-stage recorder and crest-stage gage.  Concrete control since June 25, 1996.  Elevation of gage is
   2,100 ft above sea level, from topographic map.

REMARKS.--Records poor.  Two small diversions 2 mi upstream, one for city of Palm Springs and one for Palm
   Springs aerial tramway.  See schematic diagram of Salton Sea basin.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 153 ft3/s, Jan. 7, 1993, gage height, 10.18 ft, from rating
   curve extended above 35 ft3/s on basis of critical depth computation; no flow for many days in some 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       .73     e.40      .48      .96     3.1      2.5       .66      .01      .00      .00      .00      .00
  2       .73     e.48      .61     1.0      2.3      2.5       .80      .01      .00      .00      .00      .00
  3       .63     e.54      .66     1.0      1.7      2.5       .93      .13      .00      .00      .00      .00
  4      e.50     e.36      .66     1.0      1.5      2.5       .90      .28      .00      .00      .00      .00
  5      e.47     e.34      .66     1.0      1.3      2.0       .87      .26      .00      .00      .00      .00

  6      e.37     e.35      .47     1.0      1.0      1.8       .74      .26      .00      .00      .00      .00
  7      e.32     e.35      .43     1.0      1.0      1.6       .85      .26      .00      .00      .00      .00
  8      e.32     e.37      .63     1.0      1.0      1.5       .80      .27      .00      .00      .00      .00
  9      e.31      .32      .66      .91     1.0      1.5       .58      .27      .00      .00      .00      .00
 10      e.31      .48      .66      .66     1.0      1.5      1.0       .23      .00      .00      .00      .00

 11      e.31      .48      .73      .66     1.0      1.5      1.1       .24      .00      .00      .00      .00
 12      e.31      .53      .90      .66     1.0      1.6      e.95      .23      .00      .00      .00      .00
 13      e.30      .48      .91      .66     1.0      2.3      e.81      .23      .00      .00      .00      .00
 14      e.31      .53      .90      .66     1.0      2.5      e.76      .25      .00      .00      .00      .00
 15      e.32      .48      .66      .66     1.1      2.3      e.75      .26      .00      .00      .00      .00

 16      e.31      .44      .91      .72     1.0      1.7      e.52      .33      .00      .00      .00      .00
 17      e.32      .30     1.0       .53     1.0      1.5      e.40      .34      .00      .00      .00      .00
 18      e.33      .48     1.0       .62      .93     1.3      e.28      .33      .00      .00      .00      .00
 19      e.31      .48     1.0       .67      .89     1.0      e.22      .36      .00      .00      .00      .00
 20      e.35      .50     1.0       .66     2.7       .88     e.16      .33      .00      .00      .00      .00

 21      e.29      .32     1.0      1.3      3.2       .66     e.10      .02      .00      .00      .00      .00
 22      e.30      .48     1.0      2.4      3.1       .66     e.08      .02      .00      .00      .00      .00
 23      e.31      .58     1.8      2.0      2.9       .91     e.01      .03      .00      .00      .00      .00
 24      e.33      .66     1.5      2.0      2.5      1.0      e.00      .36      .00      .00      .00      .00
 25      e.33      .66     1.5      1.8      2.9      1.0      e.00      .72      .00      .00      .00      .00

 26      e.33      .66     1.3      1.5      3.1      1.0       .00      .36      .00      .00      .00      .00
 27      e.32      .74     1.0      1.5      3.1      1.0       .00      .32      .00      .00      .00      .00
 28      e.32      .77     1.0      1.5      2.5      1.0       .00      .30      .00      .00      .00      .00
 29      e.32      .45     1.0      1.5      2.5      1.0       .01      .30      .00      .00      .00      .00
 30      e.33      .48     1.0      1.3       ---     1.0       .01      .33      .00      .00      .00      .00
 31      e.35      ---     1.0      2.2       ---      .89      ---      .23      ---      .00      .00      ---

TOTAL   11.39    14.49    28.03    35.03    52.32    46.60    14.29     7.87     0.00     0.00     0.00     0.00
MEAN      .37      .48      .90     1.13     1.80     1.50      .48      .25     .000     .000     .000     .000
MAX       .73      .77      1.8      2.4      3.2      2.5      1.1      .72      .00      .00      .00      .00
MIN       .29      .30      .43      .53      .89      .66      .00      .01      .00      .00      .00      .00
AC-FT      23       29       56       69      104       92       28       16      .00      .00      .00      .00

  e Estimated.


                  10257720  CHINO CANYON CREEK BELOW TRAMWAY, NEAR PALM SPRINGS, CA--Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1987 - 1996, BY WATER YEAR (WY)

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

MEAN      .35      .47      .51     2.34     3.01     2.48     1.48      .70      .25     .054      .11      .24
MAX      1.19     1.32     1.49     14.0     17.8     8.82     3.85     2.09      .77      .28      .65     1.38
(WY)     1994     1987     1994     1993     1993     1993     1993     1993     1995     1987     1993     1993
MIN      .000     .000     .000     .031     .096      .28      .11     .057     .000     .000     .000     .000
(WY)     1991     1991     1991     1991     1991     1989     1989     1989     1992     1989     1990     1990

SUMMARY STATISTICS           FOR 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1987 - 1996

ANNUAL TOTAL                         677.22                     210.02
ANNUAL MEAN                            1.86                        .57                        .99
HIGHEST ANNUAL MEAN                                                                          4.02           1993
LOWEST ANNUAL MEAN                                                                            .19           1989
HIGHEST DAILY MEAN                    15     Mar 11               3.2   Feb 21              49       Jan 17 1993
LOWEST DAILY MEAN                       .00  Jul 27                .00  Apr 24                .00    Jun 15 1989
ANNUAL SEVEN-DAY MINIMUM                .00  Jul 27                .00  Jun  1                .00    Jun 15 1989
INSTANTANEOUS PEAK FLOW                                           5.2   Jan 31             153       Jan  7 1993
INSTANTANEOUS PEAK STAGE                                          8.77  Jan 31              10.18    Jan  7 1993
ANNUAL RUNOFF (AC-FT)               1340                        417                        716
10 PERCENT EXCEEDS                     5.2                        1.5                        2.3
50 PERCENT EXCEEDS                      .74                        .33                        .29
90 PERCENT EXCEEDS                      .00                        .00                        .00

                     10257720  CHINO CANYON CREEK BELOW TRAMWAY, NEAR PALM SPRINGS, CA--Continued

                                                 WATER-QUALITY RECORDS

PERIOD OF RECORD.--
  CHEMICAL DATA:  Water years 1987 to current year.



                             WATER-QUALITY DATA, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996

                            DIS-              PH                        HARD-
                          CHARGE,   SPE-     WATER             HARD-    NESS              MAGNE-
                           INST.    CIFIC    WHOLE             NESS    NONCARB  CALCIUM    SIUM,  SODIUM,
                           CUBIC    CON-     FIELD   TEMPER-   TOTAL   DISSOLV   DIS-      DIS-    DIS-
                            FEET    DUCT-   (STAND-   ATURE    (MG/L   FLD. AS   SOLVED   SOLVED  SOLVED
         DATE      TIME     PER     ANCE      ARD     WATER     AS      CACO3    (MG/L    (MG/L    (MG/L    SODIUM
                           SECOND  (US/CM)   UNITS)  (DEG C)   CACO3)  (MG/L)    AS CA)   AS MG)   AS NA)  PERCENT

     NOV
       13...       1630      0.48      220      8.5     14.5       84     0       29        2.9     11        21
     APR
       15...       1300      0.73      205      8.6     17.5       83     0       29        2.6      9.5      19



                                   BICAR-    CAR-     ALKA-                                       SOLIDS,  SOLIDS,
                  SODIUM   POTAS-  BONATE   BONATE   LINITY             CHLO-    FLUO-   SILICA,  RESIDUE  SUM OF
                    AD-     SIUM,   WATER    WATER   WAT DIS  SULFATE   RIDE,    RIDE,    DIS-    AT 180   CONSTI-
                  SORP-     DIS-   DIS IT   DIS IT   TOT IT    DIS-     DIS-      DIS-    SOLVED   DEG. C  TUENTS,
                   TION    SOLVED   FIELD    FIELD    FIELD    SOLVED   SOLVED   SOLVED   (MG/L     DIS-     DIS-
         DATE     RATIO    (MG/L   MG/L AS  MG/L AS  MG/L AS   (MG/L    (MG/L    (MG/L     AS      SOLVED   SOLVED
                           AS K)    HCO3      CO3     CACO3   AS SO4)   AS CL)   AS F)    SIO2)    (MG/L)   (MG/L)

     NOV
       13...         0.5     5.3       123        1      103     4.3      2.7     <0.10    19         142      136
     APR
       15...         0.5     5.2       109        2       93     5.2      2.6     <0.10    17         134      127



                           NITRO-   NITRO-   NITRO-   NITRO-            PHOS-
                 SOLIDS,    GEN,     GEN,     GEN,   GEN,AM-   PHOS-   PHORUS                               MANGA-
                   DIS-   NITRITE  NO2+NO3  AMMONIA  MONIA +  PHORUS    ORTHO,  ARSENIC   BORON,   IRON,    NESE,
                  SOLVED    DIS-     DIS-     DIS-   ORGANIC    DIS-    DIS-      DIS-     DIS-     DIS-     DIS-
                  (TONS    SOLVED   SOLVED   SOLVED   DIS.     SOLVED  SOLVED    SOLVED   SOLVED   SOLVED   SOLVED
         DATE      PER     (MG/L    (MG/L    (MG/L    (MG/L    (MG/L   (MG/L     (UG/L    (UG/L    (UG/L    (UG/L
                  AC-FT)   AS N)    AS N)    AS N)    AS N)    AS P)   AS P)     AS AS)   AS B)    AS FE)   AS MN)

     NOV
       13...        0.19   <0.010   <0.050   <0.015    <0.20   <0.010   <0.010       <1     20        6.0    <1.0
     APR
       15...        0.18   <0.010    0.080   <0.015    <0.20   <0.010   <0.010       <1     30       13       1.0