10345700 BRONCO CREEK AT FLORISTON, CA
LOCATION.--Lat 39°23'02", long 120°01'11", in SE 1/4 NW 1/4 sec.31, T.18 N., R.18 E., Nevada County, Hydrologic
Unit 16050102, on right bank 80 ft upstream from railroad bridge, 200 ft upstream from mouth, and 0.7 mi north
of Floriston.
DRAINAGE AREA.--15.4 mi2.
PERIOD OF RECORD.--April 1993 to current year.
WATER TEMPERATURE: April 1993 to September 1994.
GAGE.--Water-stage recorder. Elevation of gage is 5,350 ft above sea level, from topographic map.
REMARKS.--Records poor. No storage or diversion upstream from station. See schematic diagram of Truckee River
basin.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 222 ft3/s, July 5, 1995, gage height, 4.28 ft; minimum daily,
2.8 ft3/s, several days in 1994.
EXTRENES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 40 ft3/s or maximum:
Discharge Gage height Discharge Gage height
Date Time (ft3/s) (ft) Date Time (ft3/s) (ft)
May 16 Unknown 146 a4.09
(a) From crest stage gage.
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 13 8.6 7.9 9.0 6.9 8.2 12 e48 44 21 10 6.9
2 12 7.7 7.4 8.9 6.8 8.4 12 e52 44 21 10 6.6
3 12 8.1 6.9 8.7 6.8 9.6 12 e51 53 21 9.6 6.5
4 11 8.4 7.9 8.2 16 9.7 11 e50 57 20 9.6 6.6
5 11 8.9 7.6 8.1 16 9.3 12 e49 52 19 9.4 6.8
6 11 8.8 7.1 7.9 12 e9.3 14 e48 61 18 9.3 6.8
7 10 8.8 7.1 7.6 12 9.3 17 e48 59 18 9.0 6.7
8 9.8 8.8 7.0 7.6 11 9.5 23 e48 58 18 8.6 6.7
9 9.5 8.4 6.9 7.4 11 10 27 45 55 17 8.8 6.6
10 8.9 8.4 6.7 7.2 11 11 27 48 51 16 8.7 6.6
11 9.0 8.3 8.4 7.2 11 11 24 50 48 17 8.8 6.5
12 9.7 8.1 23 7.2 11 11 22 47 48 17 8.9 6.5
13 9.4 8.3 13 7.3 11 10 21 48 45 18 9.6 7.4
14 9.1 8.6 12 7.4 11 9.9 21 78 42 17 9.4 7.1
15 8.6 8.5 13 7.7 11 11 23 81 41 16 8.6 7.5
16 9.0 8.5 12 9.0 11 11 25 e140 40 15 8.4 9.0
17 8.7 8.5 e12 7.8 12 12 22 98 37 14 8.2 8.1
18 9.3 8.3 11 8.1 12 14 21 e85 35 14 8.2 7.4
19 9.3 7.9 e11 8.2 13 15 e19 e75 33 14 8.1 7.2
20 9.6 7.6 e11 8.1 12 17 e17 65 30 13 7.9 6.9
21 9.7 7.6 e10 8.2 11 18 e15 56 28 13 7.9 7.0
22 9.5 7.7 e10 e8.0 11 18 e15 45 27 13 8.1 6.9
23 10 7.8 10 e7.8 e10 16 e22 48 28 12 7.8 6.9
24 9.8 7.7 e10 7.5 e9.5 14 e30 43 26 14 7.7 6.7
25 9.7 8.1 e9.0 7.2 e9.5 13 e32 42 28 13 7.8 6.5
26 9.5 8.3 8.4 e7.8 e9.5 13 e34 45 27 12 7.7 6.5
27 9.6 7.4 8.5 7.8 e9.0 13 e34 43 25 12 7.4 6.5
28 9.6 8.9 8.5 7.4 8.7 12 e32 43 23 12 7.3 6.4
29 9.2 8.3 8.0 7.1 8.4 11 e35 41 22 11 7.0 6.4
30 9.4 7.9 9.5 7.0 --- 11 e41 42 22 11 7.0 6.5
31 9.1 --- 10 6.9 --- 11 --- 44 --- 11 7.0 ---
TOTAL 305.0 247.2 300.8 241.3 311.1 366.2 672 1746 1189 478 261.8 206.7
MEAN 9.84 8.24 9.70 7.78 10.7 11.8 22.4 56.3 39.6 15.4 8.45 6.89
MAX 13 8.9 23 9.0 16 18 41 140 61 21 10 9.0
MIN 8.6 7.4 6.7 6.9 6.8 8.2 11 41 22 11 7.0 6.4
AC-FT 605 490 597 479 617 726 1330 3460 2360 948 519 410
e Estimated.
10345700 BRONCO CREEK AT FLORISTON, CA--Continued
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1993 - 1996, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 7.14 6.52 6.67 5.87 7.43 9.31 14.8 34.3 36.7 29.3 11.1 7.68
MAX 9.84 8.24 9.70 7.78 10.7 11.8 22.4 56.3 62.2 73.7 23.0 13.6
(WY) 1996 1996 1996 1996 1996 1996 1996 1996 1995 1995 1995 1995
MIN 4.08 5.34 4.66 4.81 5.31 5.87 8.63 11.7 6.81 4.05 3.25 3.13
(WY) 1995 1995 1995 1994 1994 1994 1994 1994 1994 1994 1994 1994
SUMMARY STATISTICS FOR 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1993 - 1996
ANNUAL TOTAL 8208.5 6325.1
ANNUAL MEAN 22.5 17.3 14.9
HIGHEST ANNUAL MEAN 21.3 1995
LOWEST ANNUAL MEAN 6.06 1994
HIGHEST DAILY MEAN 152 Jul 5 140 May 16 152 Jul 5 1995
LOWEST DAILY MEAN 4.1 Jan 6 6.4 Sep 28 2.8 Aug 30 1994
ANNUAL SEVEN-DAY MINIMUM 4.3 Jan 1 6.5 Sep 24 2.9 Aug 27 1994
INSTANTANEOUS PEAK FLOW 146 May 16 222 Jul 5 1995
INSTANTANEOUS PEAK STAGE 4.09 May 16 4.28 Jul 5 1995
ANNUAL RUNOFF (AC-FT) 16280 12550 10790
10 PERCENT EXCEEDS 55 44 41
50 PERCENT EXCEEDS 12 10 8.4
90 PERCENT EXCEEDS 5.7 7.1 4.3
USGS Water Resources of California
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