11160430 BEAN CREEK NEAR SCOTTS VALLEY, CA

LOCATION.-Lat 37°03'19", long 122°02'25", in San Augustin Grant, Santa Cruz County, Hydrologic Unit 18060001, on right bank, 0.3 mi downstream from 
unnamed left bank tributary, 100 ft northeast of Mt. Hermon Road, 1.2 mi northwest of Scotts Valley Post Office, and 1.8 mi east of Felton. 
DRAINAGE AREA.-8.81 mi2. 
PERIOD OF RECORD.-January 1989 to current year. 
REVISED RECORDS.-WDR CA-93-2: 1989-92 (P). 
GAGE.-Water-stage recorder and crest-stage gage. Elevation of gage is 320 ft above sea level, from topographic map. 
REMARKS.-Records fair except for estimated daily discharges, which are poor. No regulation; small diversions upstream from station for domestic use. 
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 1,710 ft3/s, Feb. 3, 1998, gage height, 10.85 ft, from rating curve extended above 310 
ft3/s on basis of slope-area measurement at gage height 9.29 ft; minimum daily, 0.94 ft3/s, Jan. 31, 1992. 
EXTREMES FOR CURRENT YEAR.-Peak discharges greater than base discharge of 200 ft3/s, or maximum: 
  			Discharge	Gage height			Discharge	Gage height
  	Date	Time	(ft3/s)	(ft)	Date	Time	(ft3/s)	(ft)
  	Jan. 12	Unknown	269	6.16	Feb. 3	0200	1,710	10.85
  	Jan. 15	Unknown	228	6.00	Feb. 7	1415	1,340	9.78
  	Jan. 29	0615	221	5.97	Feb. 21	Unknown	Unknown	  Unknown

                  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       2.2      2.3      5.6      3.5      173       38     37       13      e21        5.7      3.8      2.8
  2       2.3      2.3      4.5     15        441       35     33       11      e18        5.6      3.7      2.8
  3       2.0      2.2      4.1     20        622      e32     52        9.4    e16        5.6      3.7      2.7
  4       2.0      2.2      4.3     43        138      e50     53        9.9    e15        5.6      3.6      2.7
  5       2.1      2.1      8.2    e29        103      e75     44       11       14        5.5      3.6      2.7
 
  6       2.1      2.2      6.3    e23        370      e38     41        9.0     13        5.5      3.6      2.6
  7       2.2      2.2     19      e19        508      e30     38        8.6     12        5.4      3.5      2.7
  8       2.3      2.4     15      e16       e300      e25    e32        8.2     11        5.3      3.5      2.7
  9       3.8      2.4      7.5    e14       e165      e22    e24        8.0      9.8      5.2      3.5      2.8
 10       2.2      3.7      6.2    e66        e95      e19    e20        7.8      9.5      5.1      3.5      2.7
 
 11       2.2      1.9      5.4    e56        e62       21    e23        7.8      9.2      5.1      3.4      2.7
 12       2.2      1.7      4.9   e190         66       22    e25       15        8.7      5.1      3.3      2.6
 13       2.2      5.1      4.6    e70         56       41    e28        9.5      8.4      5.0      3.3      2.6
 14       2.2      2.2     38      e56        119       27    e17        8.3      8.3      5.0      3.3      2.7
 15       2.2      7.0    e20     e152         78      e24    e15        8.1      8.2      4.9      3.4      2.6
 
 16       2.2      8.3     e8.5    e90         74      e21    e14        8.0      8.1      4.9      3.4      2.6
 17       2.1      2.8     e7.2    e41         64      e19    e13        7.7      7.6      5.0      3.3      2.6
 18       2.2      6.4     e6.1    e73         50      e17    e11        7.5      7.3      5.0      3.1      2.5
 19       2.3      7.3     e5.4    e97        115      e15    e10        7.3      7.1      4.9      3.2      2.6
 20       2.2      2.3      5.2    e40         91      e14     e9.8      7.3      7.0      4.7      3.2      2.5
 
 21       2.2      1.9      4.9    e34       e360      e17     e9.3      7.1      6.9      4.7      3.1      2.5
 22       2.2      2.3      4.8    e31       e130       24    e10        6.8      6.9      4.6      3.2      2.5
 23       2.2      2.8      4.5     35       e185       50    e17        6.9      6.7      4.4      3.1      2.5
 24       2.1      2.8      4.4     30        e90       86    e13        6.7      6.3      4.4      3.2      2.5
 25       2.2      6.9      4.3     27         72       59    e12        6.5      6.3      4.3      3.2      2.6
 
 26       2.3     53        4.0     26         56       49    e11        6.4      6.2      4.2      3.2      2.6
 27       2.4      9.8      3.9     36         48       42    e10        7.3      6.2      4.5      3.1      2.6
 28       2.3      5.1      3.8     32         41       42      9.9     48        6.0      4.2      3.0      2.6
 29       2.4      6.2      3.7    135        ---       34      9.3     46        5.9      4.1      2.9      2.7
 30       2.4     17        3.7     75        ---       30      9.0     30        5.8      4.1      2.9      2.6
 31       2.3      ---      3.6     64        ---       39      ---     24        ---      4.1      2.9      ---
 
TOTAL    70.2    176.8    231.6   1638.5     4672     1057    650.3    378.1    282.4    151.7    102.7     78.9
MEAN     2.26     5.89     7.47     52.9      167     34.1     21.7     12.2     9.41     4.89     3.31     2.63
MAX       3.8       53       38      190      622       86       53       48       21      5.7      3.8      2.8
MIN       2.0      1.7      3.6      3.5       41       14      9.0      6.4      5.8      4.1      2.9      2.5
AC-FT     139      351      459     3250     9270     2100     1290      750      560      301      204      156
 
    e  Estimated.


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 1998, BY WATER YEAR (WY)                                 
          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
MEAN     2.37     3.43     13.1     41.6     39.6     24.2     7.53     5.50     3.47     2.50     2.20     2.08
MAX      3.14     5.89     72.5     99.7      167     71.8     21.7     12.2     9.41     4.89     3.31     2.63
(WY)     1995     1998     1997     1995     1998     1995     1998     1998     1998     1998     1998     1998
MIN      1.96     1.96     2.16     2.11     2.42     3.81     2.62     2.33     1.79     1.71     1.84     1.76
(WY)     1991     1993     1991     1991     1991     1994     1990     1989     1994     1991     1989     1990
 
SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1989 - 1998
 
ANNUAL TOTAL                        4626.8                     9490.2                                           
ANNUAL MEAN                           12.7                       26.0                       12.6                
HIGHEST ANNUAL MEAN                                                                         26.0            1998
LOWEST ANNUAL MEAN                                                                           3.00           1990
  HIGHEST DAILY MEAN                   594     Jan  1             622     Feb  3             900       Dec 10 1996
  LOWEST DAILY MEAN                      1.7   Nov 12               1.7   Nov 12                .94    Jan 31 1992
  ANNUAL SEVEN-DAY MINIMUM               1.9   Jul 21               2.1   Oct  1               1.0     Jan 21 1992
  INSTANTANEOUS PEAK FLOW                                        1710     Feb  3            1710       Feb  3 1998
  INSTANTANEOUS PEAK STAGE                                         10.85  Feb  3              10.85    Feb  3 1998
ANNUAL RUNOFF (AC-FT)               9180                      18820                       9160                  
10 PERCENT EXCEEDS                    21                         57                         24                  
50 PERCENT EXCEEDS                     3.4                        6.9                        2.7                
90 PERCENT EXCEEDS                     2.0                        2.3                        1.9