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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 12335500 Nevada Cr ab reservoir, nr Helmville, MT


Powell County, Montana
Hydrologic Unit Code 17010203
Latitude  46°46'40.00", Longitude 112°46'04.03" NAD83
Drainage area 119  square miles
Gage datum 4,640 feet above NAVD88
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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 1938-10-01 -> 2025-09-30)

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 11 13 20 73 70 127 41 20 10 11 16 14
2 11 13 22 86 71 129 39 19 9.9 11 16 15
3 11 13 20 71 75 130 37 19 9.6 12 16 15
4 14 16 21 60 82 127 38 18 9.4 12 16 15
5 17 15 21 62 85 122 36 18 9.5 12 16 14
6 12 14 19 71 86 121 32 18 9.3 12 16 13
7 11 19 21 81 93 118 31 17 9.2 12 16 13
8 11 18 21 70 94 115 29 17 9.5 12 16 13
9 11 19 20 71 94 110 28 17 9.6 13 16 14
10 11 16 21 73 97 108 30 16 9.3 13 15 13
11 11 15 24 73 99 103 28 16 9.3 13 15 13
12 11 13 26 70 99 97 29 16 9.9 14 15 13
13 11 13 26 66 101 98 28 15 9.5 14 16 13
14 12 13 26 64 105 90 27 15 9.4 14 16 13
15 17 14 27 63 113 86 26 14 9.9 14 15 12
16 15 15 34 66 117 84 26 14 9.7 14 15 12
17 13 14 37 63 124 84 26 14 9.8 14 15 12
18 12 14 38 60 130 79 25 13 10 14 15 12
19 13 14 41 59 131 79 24 13 10 14 15 12
20 13 16 40 64 132 79 24 13 10 15 15 14
21 12 18 43 65 135 75 23 13 10 15 14 13
22 12 17 47 64 144 67 22 12 11 15 15 12
23 12 15 54 65 139 61 22 13 11 15 14 13
24 12 16 52 67 137 58 22 13 10 15 15 12
25 12 24 48 67 143 54 21 12 10 15 15 12
26 12 25 54 65 139 53 21 11 10 16 14 14
27 12 20 54 66 132 49 21 11 11 15 14 12
28 12 17 49 66 129 46 21 11 11 15 14 11
29 12 19 45 68 128 46 21 11 10 15 13 11
30 13   46 70 131 42 20 11 11 15 13 11
31 15   54   129   20 11   16   13