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USGS Daily Statistics for California

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 11525630 GRASS VALLEY C NR LEWISTON CA


Trinity County, California
Hydrologic Unit Code 18010211
Latitude  40°41'12", Longitude 122°51'36" NAD27
Drainage area 36.2  square miles
Gage datum 1,680 feet above NGVD29
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 2004-10-01 -> 2019-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 48 52 89 87 61 44 23 12 9.7 9.3 16 25
2 43 66 120 85 60 43 22 12 9.6 9.6 15 52
3 40 61 101 84 63 42 21 12 9.5 10 14 25
4 49 66 82 85 62 42 21 12 9.4 10 14 24
5 45 91 85 83 66 41 20 12 9.5 11 14 26
6 42 102 103 81 64 40 20 12 9.4 11 14 25
7 39 114 88 86 62 39 19 12 9.6 10 16 24
8 46 90 79 80 69 39 19 11 9.5 10 15 27
9 52 112 76 78 69 38 19 11 9.6 10 14 24
10 55 86 82 76 62 37 18 11 9.4 11 14 28
11 50 74 93 87 60 36 18 11 9.4 10 14 48
12 44 66 88 130 58 35 17 11 9.3 10 14 31
13 48 63 89 105 56 35 17 11 9.3 11 15 27
14 44 66 85 90 55 33 17 11 9.4 13 14 27
15 41 64 80 81 57 32 16 11 9.5 12 14 38
16 55 65 86 76 63 32 16 11 9.5 12 15 32
17 64 62 78 75 59 31 16 10 9.6 12 14 30
18 72 64 74 74 67 33 16 10 9.7 12 14 29
19 98 61 73 72 64 32 15 10 9.8 12 15 41
20 98 66 87 71 61 30 15 10 9.7 12 18 41
21 79 71 91 71 58 29 15 10 9.6 12 17 44
22 68 72 91 70 59 28 15 10 9.6 12 17 49
23 61 78 89 69 54 27 14 9.9 9.6 13 17 39
24 56 77 103 68 53 27 14 9.9 9.5 16 16 35
25 55 69 95 67 52 26 14 9.8 10 14 16 33
26 59 93 90 66 51 26 13 9.7 9.5 13 16 38
27 56 127 98 66 50 25 13 9.7 9.4 13 17 59
28 59 94 100 65 48 25 13 9.7 9.3 14 16 76
29 63 54 88 64 46 25 13 9.9 9.5 15 29 59
30 56   94 62 45 24 13 9.8 9.1 15 31 70
31 52   95   45   12 9.7   15   54