10339400  MARTIS CREEK NEAR TRUCKEE, CA

LOCATION.--Lat 39°19'44", long 120°07'00", in NE 1/4 NW 1/4 sec.17, T.17 N., R.17 E., Nevada County, Hydrologic
   Unit 16050102, on left bank 0.2 mi downstream from Martis Creek Lake Dam, 1.8 mi upstream from mouth, and
   3.5 mi east of Truckee.

DRAINAGE AREA.--39.9 mi2.

                                             WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1958 to November 1990, June 1993 to current year.

REVISED RECORDS.--WDR CA-79-3:  Drainage area.

GAGE.--Water-stage recorder.  Elevation of gage is 5,730 ft above sea level, from topographic map.  Prior to
   July 10, 1972, at site 1.0 mi downstream at different datum.

REMARKS.--Records good.  Flow is completely regulated by Martis Creek Lake since Oct. 7, 1971.  See schematic
   diagram of Truckee River basin.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 1,880 ft3/s, Feb. 1, 1963, gage height, 6.16 ft, site and
   datum then in use; minimum, 1.1 ft3/s, July 19, 20, 1961.  Maximum discharge since construction of Martis
   Creek Lake Dam in 1971, 663 ft3/s, Feb. 28, 1986, gage height, 5.66 ft; maximum gage height, 6.01 ft,
   Apr. 2, 1974; minimum daily, 0.20 ft3/s, Nov. 9-14, 1977.


                  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      12       11        9.3       16       17      e38      112       96       39     14        9.6      8.5
  2      12       11        9.3       14       17       37      133       98       36     13        9.1      8.2
  3      11       10        9.3       14       17       40      107       96       34     13        8.9      8.0
  4      11       10        9.7       14       37       66      100       88       32     12        9.0      8.0
  5      11       10       10         14       68       44      100       81       31     12        8.9      7.9

  6      11       10        9.8       13       70       47      103       79       29     12        8.8      8.4
  7      11       10        9.6       13      125       52      110       76       28     12        8.9      8.4
  8      10       10        9.4       12      193       48      121       74       26     12        8.7      8.5
  9      11       10        9.3       12      104       50      134       69       25     12        8.7      8.5
 10      10       10        9.2       12       69       55      130       65       23     12        8.6      8.4

 11      10       10       13         12       62       71      115       62       22     12        8.7      8.4
 12       9.7     10       58         11       58       69      104       64       22     12        8.9      8.3
 13      10       10       68         11       55       59       93       66       21     13        9.5      8.3
 14      10       10       58         11       52       55       89       68       19     13       11        9.2
 15      10        9.8     24         12       50       61       92       80       18     14        9.6      9.4

 16       9.9      9.6     16         32       65       69      165      216       17     13        9.1     10
 17      10        9.6     13         39       96       77      140      218       16     13        9.1      9.9
 18       9.8      9.3     12         26      102       88      129      238       16     12        9.0      9.4
 19      10        9.3     12         26      192      101      101      147       16     12        9.1      9.2
 20      10        9.3     11         22      204      112       93      110       15     12        9.1      9.0

 21       9.7      9.3     10         17      122      116       82       95       15     13        9.3      8.9
 22       9.6      9.3     10         17       94      116       74       87       15      6.8      9.5      8.7
 23       9.6      9.3     10         17       89       98       73       76       15      2.8      9.1      8.7
 24      10        9.3     10         16      e83       83       83       70       15     18        8.7      8.8
 25      10        9.5     10         16      e72       76       90       63       18     18        8.9      8.9

 26      10       11       10         16      e64       70       94       58       20     12        8.8      8.8
 27      10       10       29         21      e56       75       99       56       20     11        8.7      8.6
 28      10        9.7     10         19      e50      114       95       53       18     11        8.8      8.6
 29      10        9.5     11         18      e44       84       89       47       16     12        8.8      8.7
 30      10        9.3     12         17      ---       81       93       43       15     11        8.5      8.7
 31      10        ---     17         17      ---       82      ---       42      ---     10        8.4      ---

TOTAL   318.3    295.1    518.9      527     2327     2234     3143     2781      652    375.6    279.8    261.3
MEAN     10.3     9.84     16.7     17.0     80.2     72.1      105     89.7     21.7     12.1     9.03     8.71
MAX        12       11       68       39      204      116      165      238       39       18       11       10
MIN       9.6      9.3      9.2       11       17       37       73       42       15      2.8      8.4      7.9
AC-FT     631      585     1030     1050     4620     4430     6230     5520     1290      745      555      518

  e Estimated.


                               10339400  MARTIS CREEK NEAR TRUCKEE, CA--Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1959 - 1971, BY WATER YEAR (WY)

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

MEAN     8.05     12.0     18.5     30.6     28.0     36.5     60.2     59.5     22.6     6.40     4.90     5.51
MAX      16.4     18.0     86.5      116     83.4     78.8      148      202     96.6     18.0     10.8     10.1
(WY)     1963     1971     1965     1970     1963     1967     1969     1967     1967     1967     1967     1967
MIN      3.73     4.81     5.38     4.28     9.60     11.1     15.4     9.80     3.21     1.79     1.81     2.37
(WY)     1962     1962     1962     1962     1964     1961     1961     1961     1960     1961     1964     1960

SUMMARY STATISTICS                      WATER YEARS 1959 - 1971

ANNUAL MEAN                                24.4
HIGHEST ANNUAL MEAN                        47.2            1969
LOWEST ANNUAL MEAN                          6.89           1961
HIGHEST DAILY MEAN                        903       Jan 31 1963
LOWEST DAILY MEAN                           1.3     Jul 30 1961
ANNUAL SEVEN-DAY MINIMUM                    1.4     Jul 29 1961
INSTANTANEOUS PEAK FLOW                  1880       Feb  1 1963
INSTANTANEOUS PEAK STAGE                    6.16    Feb  1 1963
ANNUAL RUNOFF (AC-FT)                   17650
10 PERCENT EXCEEDS                         57
50 PERCENT EXCEEDS                         11
90 PERCENT EXCEEDS                          2.7



STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1972 - 1996, BY WATER YEAR (WY)

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

MEAN     8.87     17.3     20.8     23.3     35.7     45.9     49.9     56.4     36.1     14.5     10.3     9.05
MAX      20.8     80.0     95.5     77.7      149      181      139      219      169     75.0     76.0     40.2
(WY)     1983     1984     1982     1980     1986     1986     1982     1983     1983     1986     1995     1995
MIN      3.09     1.57     1.25     6.42     8.10     8.35     8.52     7.40     3.96     2.67     2.01     2.40
(WY)     1972     1978     1978     1978     1994     1974     1980     1994     1994     1994     1994     1994

SUMMARY STATISTICS           FOR 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1972 - 1996

ANNUAL TOTAL                       18794.1                    13713.0
ANNUAL MEAN                           51.5                       37.5                       27.4
HIGHEST ANNUAL MEAN                                                                         74.5            1983
LOWEST ANNUAL MEAN                                                                           6.90           1977
HIGHEST DAILY MEAN                   397     May 24             238     May 18             626       Mar  1 1986
LOWEST DAILY MEAN                      3.9   Jan 18               2.8   Jul 23                .20    Nov  9 1977
ANNUAL SEVEN-DAY MINIMUM               4.1   Jan 16               8.2   Aug 31                .21    Nov  9 1977
INSTANTANEOUS PEAK FLOW                                         259     May 16             663       Feb 28 1986
INSTANTANEOUS PEAK STAGE                                          4.03  May 16               6.01    Apr  2 1974
ANNUAL RUNOFF (AC-FT)              37280                      27200                      19820
10 PERCENT EXCEEDS                   194                         97                         66
50 PERCENT EXCEEDS                    19                         13                         11
90 PERCENT EXCEEDS                     8.7                        8.9                        4.3

                                10339400  MARTIS CREEK NEAR TRUCKEE, CA--Continued

                                              WATER-QUALITY RECORDS

PERIOD OF RECORD.--
  CHEMICAL DATA:  Water years 1975-95.
  WATER TEMPERATURE:  Water years 1975 to current year.
  SEDIMENT DATA:  Water years 1975-95.

PERIOD OF DAILY RECORD.--
  WATER TEMPERATURE:  October 1974 to current year.

INSTRUMENTATION.--Digital water-temperature recorder since October 1974.

REMARKS.--Water temperature is affected by regulation from Martis Creek Lake Dam (station 10339380).  Unpublished
   chemical-quality, water-temperature, and sediment data prior to October 1974, available at the U.S. Geological
   Survey office in Carson City, NV.  Interruption in record due to equipment malfunction.

EXTREMES FOR PERIOD OF DAILY RECORD.--
  WATER TEMPERATURE:  Maximum recorded, 25.5°C, July 11, 12, 1993; minimum recorded, 0.0°C, Feb. 16, 17, 1982,
   Jan. 11-13, 16, 1995.

EXTREMES FOR CURRENT YEAR.--
  WATER TEMPERATURE:  Maximum recorded, 21.5°C, July 24; minimum recorded, 0.5°C, several days in February.


                WATER TEMPERATURE, DEGREES CELSIUS, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996

DAY      MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN

           OCTOBER           NOVEMBER          DECEMBER          JANUARY           FEBRUARY           MARCH

  1     13.5    12.0      10.0     8.5       7.0     6.0       4.5     3.5       3.0     2.0       1.5     1.0
  2     13.0    11.5       9.5     8.0       7.0     6.0       5.0     4.0       3.0     2.0       2.0     1.0
  3     13.5    11.5       9.0     7.5       6.5     5.5       5.5     4.0       3.0     2.0       2.0     1.5
  4     13.0    11.5       8.5     7.5       6.5     6.0       5.0     4.0       2.5     1.5       1.5     1.5
  5     12.5    11.0       8.5     7.0       6.5     6.0       5.5     4.5       1.5      .5       2.0     1.0

  6     13.0    11.0       8.5     7.0       7.0     5.5       5.5     4.5       1.0      .5       1.5     1.0
  7     12.5    11.0       9.0     7.0       7.0     6.0       5.5     4.0       1.0      .5       1.5     1.0
  8     12.5    10.5       9.0     7.5       6.5     6.0       5.5     4.5       1.0     1.0       1.5     1.0
  9     12.5    10.5       8.5     7.5       7.0     5.5       5.5     4.5       1.5     1.0       2.0     1.0
 10     13.0    10.5       8.5     7.0       6.5     5.5       5.0     4.0       2.0     1.5       2.5     1.5

 11     12.5    11.0       9.0     7.0       6.0     5.5       5.0     4.0       2.5     2.0       2.5     2.0
 12     12.5    10.5       8.5     7.0       5.5     5.0       5.5     4.0       2.5     2.0       2.5     2.0
 13     12.0    10.5       9.0     7.0       5.0     4.5       5.5     4.5       3.0     2.5       2.5     2.0
 14     12.0    10.0       8.5     7.0       5.0     4.0       5.5     4.5       3.5     2.5       3.0     2.0
 15     12.5    10.0       8.5     7.0       4.0     3.0       5.0     4.5       3.5     3.0       3.0     2.5

 16     12.5    10.5       9.0     7.5       4.0     3.0       4.5     4.0       3.5     3.0       3.5     2.5
 17     12.5    10.5       9.0     7.5       4.0     3.0       4.5     4.0       4.0     3.5       4.0     3.0
 18     12.5    10.0       9.5     7.5       4.0     3.5       4.0     3.0       4.0     3.5       4.5     3.5
 19     11.5    10.0       8.5     7.5       4.5     3.5       3.0     2.5       3.5     2.0       5.0     4.0
 20     12.0    10.0       8.5     7.0       4.5     3.5       3.0     2.0       2.0     1.0       6.5     4.5

 21     12.0    10.0       8.0     7.0       5.0     3.5       3.0     1.5       1.5     1.0       7.5     5.5
 22     11.0     9.5       8.0     6.5       4.5     3.5       3.0     2.0       1.0      .5       6.0     5.5
 23     11.0     9.5       8.0     6.5       5.0     4.0       3.0     2.0       1.0      .5       5.5     5.0
 24     10.5     9.0       7.5     6.5       5.0     3.5       3.0     1.5       1.0     1.0       5.5     4.5
 25     10.5     8.5       8.0     6.0       5.0     3.5       3.0     2.0       1.0      .5       5.0     4.5

 26     10.5     8.5       7.0     6.0       4.5     3.5       3.0     2.0       1.0      .5       5.5     4.5
 27     10.5     8.5       7.0     5.5       4.5     3.5       2.5     1.5       1.0      .5       6.5     5.0
 28     10.5     9.0       7.5     6.0       4.5     3.5       3.0     2.0       1.0      .5       5.5     5.0
 29     10.5     9.0       7.0     5.5       4.5     4.0       2.5     2.0       1.5      .5       5.5     4.5
 30     10.5     9.0       6.5     5.5       4.5     4.0       2.5     2.0       ---     ---       7.0     5.0
 31     10.5     9.0       ---     ---       4.0     3.5       2.5     2.0       ---     ---       7.5     6.0

MONTH   13.5     8.5      10.0     5.5       7.0     3.0       5.5     1.5       4.0      .5       7.5     1.0



                                10339400  MARTIS CREEK NEAR TRUCKEE, CA--Continued

                WATER TEMPERATURE, DEGREES CELSIUS, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996

DAY      MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN

            APRIL              MAY               JUNE              JULY             AUGUST          SEPTEMBER

  1      6.5     6.0      12.0     9.5      15.0    13.0      17.5    14.5      20.5     ---      19.0    16.0
  2      6.5     6.0      13.0    11.0      16.0    13.5      18.0    14.5      20.0    17.5      19.0    16.0
  3      7.0     5.5      12.5    10.5      17.0    14.5      18.0    15.5      19.5    17.0      18.5    15.5
  4      7.0     6.0      11.5    10.0      17.0    14.5      19.0    16.0      19.5    17.0      18.0    15.5
  5      9.5     7.0      11.0    10.0      17.5    15.0      18.5    16.0      19.5    17.0      17.5    14.5

  6      9.5     7.5      11.5     9.5      18.0    16.0      19.0    16.0      19.0    16.5      17.0    14.0
  7     10.5     8.5      12.0    10.0      18.5    16.0      20.0    17.0      19.0    15.5      17.0    14.0
  8     10.5     8.5      12.0    10.5      18.5    16.0      20.0    17.5      19.5    16.5      17.0    14.0
  9     10.0     8.5      12.5    10.5      18.5    16.0      20.5    17.5      19.5    16.5      17.0    14.5
 10      9.0     8.0      13.0    11.0      18.0    16.5      20.0    17.5      20.0    16.5      17.5    14.5

 11      9.0     8.0      14.0    11.5      18.0    16.0      20.5    18.0      20.0    17.0      17.5    14.5
 12      9.0     7.5      15.0    12.0      18.5    16.0      21.0    18.0      19.5    17.5      17.5    14.5
 13      7.5     6.5      15.0    12.5      18.5    16.5      20.5    18.5      20.0    17.0      15.5    14.5
 14      9.5     7.0      14.0    12.5      18.0    16.5      20.5    18.0      20.0    17.5      16.5    14.0
 15      9.0     8.0      12.5    12.0      18.5    16.0      21.0    18.5      20.0    17.5      15.0    14.0

 16      8.5     7.5      12.0    10.0      18.5    16.0      20.5    18.0      20.0    17.5      15.5    13.0
 17      7.5     6.5      10.0     9.5      18.5    16.0      20.5    18.0      20.0    17.0      15.0    12.5
 18      7.0     6.0       9.5     8.0      18.5    16.0      20.0    17.5      19.5    17.0      14.5    12.5
 19      7.0     6.0       9.0     8.0      18.0    16.0      19.5    17.0      19.5    16.5      15.0    12.5
 20      6.0     5.5      11.5     9.0      18.0    16.0      20.0    16.5      19.0    16.0      15.5    12.5

 21      6.5     5.5      11.0    10.0      18.0    16.0      20.0    17.0      19.0    16.0      15.5    12.5
 22      8.0     6.0      10.5     9.5      18.0    16.0      20.5    12.5      19.0    16.0      15.5    13.0
 23      8.5     7.0      10.0     9.0      18.0    16.0      18.0    11.0      19.0    16.0      15.5    13.0
 24      8.5     7.5      10.0     9.0      17.0    15.0      21.5    11.5      19.0    16.5      15.5    13.0
 25      9.5     7.5      10.5     9.5      16.5    15.0      20.5    18.5      19.5    16.5      15.0    13.0

 26     10.5     8.5      13.0    10.5      15.5    14.0      20.0    18.0      19.0    16.5      15.0    12.5
 27     10.5     8.5      12.0    11.0      15.0    13.5      20.0    18.0      19.0    16.0      15.0    12.5
 28     11.5     9.5      13.0    11.0      16.5    13.0      20.0    18.0      19.0    16.0      15.0    12.5
 29     10.5     9.0      13.5    11.5      17.5    13.0      20.0    18.0      19.0    16.0      15.0    12.5
 30     11.0     9.0      13.5    11.5      17.0    14.0      20.5    18.0      19.5    16.0      15.0    13.0
 31      ---     ---      13.5    12.0       ---     ---      20.5    18.0      19.0    16.0       ---     ---

MONTH   11.5     5.5      15.0     8.0      18.5    13.0      21.5    11.0      20.5     ---      19.0    12.5