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USGS Surface-Water 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 12323600 Silver Bow Creek at Opportunity MT


Deer Lodge County, Montana
Hydrologic Unit Code 17010201
Latitude  46°06'27.93", Longitude 112°48'19.02" NAD83
Drainage area 343  square miles
Gage datum 4,912 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 1987-10-01 -> 2024-09-30)

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 38 35 38 57 86 135 74 30 28 36 40 37
2 38 37 39 59 85 132 69 30 27 36 40 37
3 37 36 41 59 86 130 68 28 27 36 41 36
4 37 35 42 61 88 134 65 28 28 38 40 36
5 35 36 42 64 88 135 61 28 30 37 40 36
6 35 36 43 70 93 139 62 29 30 37 40 35
7 34 39 46 68 97 143 58 29 30 38 41 35
8 34 42 48 71 98 141 55 28 31 38 41 35
9 34 55 50 76 99 138 53 28 31 38 41 34
10 34 66 61 74 100 136 53 27 31 38 40 35
11 34 75 62 73 102 133 53 29 31 38 39 35
12 34 62 60 70 103 130 50 27 31 39 40 36
13 34 43 65 68 105 133 50 27 31 39 40 35
14 34 37 64 69 106 129 48 26 32 39 40 35
15 34 37 57 68 108 123 46 26 32 40 40 34
16 34 38 58 67 112 129 44 25 33 40 40 34
17 35 38 57 68 123 131 44 25 32 40 40 34
18 35 38 54 69 128 131 42 25 34 40 40 34
19 36 41 56 70 130 127 40 26 33 40 40 35
20 35 49 60 72 125 119 39 26 33 41 40 35
21 34 45 61 75 124 111 37 27 33 40 39 34
22 34 39 60 78 123 107 36 28 33 40 39 34
23 32 37 65 83 127 101 35 30 34 40 38 33
24 32 37 62 84 134 96 34 29 34 40 38 33
25 33 37 56 84 142 90 33 27 34 40 38 32
26 34 36 59 83 138 86 33 28 34 41 37 32
27 37 37 59 82 136 84 34 28 34 40 37 33
28 35 38 57 82 136 82 33 29 34 40 36 33
29 34 40 55 82 136 81 32 28 34 40 35 33
30 33   54 86 134 76 33 28 35 40 36 33
31 34   56   132   32 28   41   34