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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 12323670 Mill Creek nr Anaconda, MT


Deer Lodge County, Montana
Hydrologic Unit Code 17010201
Latitude  46°04'58.70", Longitude 112°55'01.88" NAD83
Drainage area 39.5  square miles
Gage datum 5,470 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 2004-10-01 -> 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 9.6 9.2 9.5 17 49 145 97 27 17 15 14 12
2 10 9.4 9.5 17 51 147 91 26 16 15 14 12
3 10 9.5 9.4 17 54 152 88 25 15 15 14 12
4 9.9 9.6 9.3 19 55 158 84 24 16 15 14 12
5 9.8 9.8 9.4 19 60 165 81 24 16 15 14 12
6 9.9 9.4 9.8 19 64 166 77 24 16 15 14 11
7 9.9 10 9.5 20 70 163 73 24 16 15 14 11
8 10 10 9.3 21 71 163 70 24 16 15 15 11
9 9.6 9.8 9.5 22 72 154 66 23 17 15 14 11
10 9.4 9.7 11 22 74 148 62 22 16 14 14 11
11 9.5 9.6 10 23 74 143 60 22 16 15 14 11
12 9.4 9.6 10 24 75 137 58 21 15 15 13 11
13 9.5 9.5 10 25 80 140 58 21 15 15 14 11
14 9.6 9.7 11 25 84 132 57 21 15 15 14 11
15 9.4 9.7 12 25 88 125 53 20 15 14 14 11
16 9.7 9.5 13 24 98 126 49 19 15 15 14 10
17 9.8 9.2 13 24 110 130 48 19 15 15 13 11
18 10 9.3 14 25 116 129 45 18 15 14 14 11
19 10 9.6 14 26 122 123 42 18 15 15 14 11
20 9.6 9.5 14 28 127 120 40 18 15 15 13 11
21 9.5 9.2 14 32 126 122 39 19 15 14 12 11
22 9.6 9.3 14 36 127 123 37 19 15 14 13 11
23 9.5 9.3 14 40 129 122 36 21 15 14 12 10
24 9.3 9 14 40 136 119 34 20 14 14 13 10
25 9.4 9 14 41 135 114 33 19 14 15 12 10
26 9.5 9.1 14 43 134 108 32 19 14 14 13 10
27 9.3 9.1 14 44 136 105 32 18 14 14 12 10
28 9.1 9.5 15 44 141 102 31 18 14 14 12 11
29 9.2 10 15 46 143 101 29 17 14 14 11 11
30 9.2   15 49 144 100 28 17 15 14 12 10
31 9.4   16   147   27 17   14   9.9