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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 12338300 NF Blackfoot R ab Dry Gulch nr Ovando MT


Powell County, Montana
Hydrologic Unit Code 17010203
Latitude  46°58'46.18", Longitude 113°05'31.87" NAD83
Drainage area 310  square miles
Gage datum 4,060 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 1997-10-01 -> 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
1 113 104 98 172 740 1,580 745 267 188 159 153 135
2 113 103 98 174 794 1,580 704 263 186 158 152 135
3 112 102 98 173 872 1,580 667 258 184 157 150 135
4 111 102 98 174 908 1,570 653 253 182 157 150 133
5 112 102 98 179 949 1,580 617 252 181 156 150 131
6 110 101 98 186 1,010 1,600 584 247 179 155 149 130
7 109 101 97 196 1,040 1,530 560 244 178 154 160 129
8 110 102 98 210 1,040 1,450 540 241 177 153 193 129
9 109 102 97 221 1,020 1,360 518 237 177 153 170 128
10 109 103 98 228 1,020 1,290 490 233 177 152 161 128
11 108 102 99 230 1,000 1,230 470 230 175 152 154 129
12 107 102 102 244 1,020 1,170 454 226 174 152 151 129
13 106 102 105 268 1,120 1,190 440 225 173 152 156 128
14 106 102 106 286 1,210 1,200 427 221 171 151 155 127
15 105 102 111 296 1,220 1,200 410 218 170 150 152 126
16 105 102 133 291 1,330 1,170 397 215 169 150 151 123
17 106 101 131 289 1,440 1,190 383 213 168 151 149 122
18 107 101 130 300 1,500 1,170 371 211 167 150 148 121
19 107 100 133 316 1,570 1,130 359 209 167 150 147 121
20 108 100 135 354 1,640 1,110 349 207 167 149 146 121
21 108 100 135 413 1,620 1,070 338 206 165 149 145 121
22 108 99 136 482 1,570 1,050 329 205 165 149 144 120
23 107 99 139 556 1,540 1,050 320 202 164 149 143 118
24 107 98 140 595 1,580 1,000 311 202 163 150 143 118
25 106 98 144 629 1,610 953 303 200 161 149 142 118
26 106 97 147 628 1,660 902 296 197 160 148 140 117
27 105 97 148 646 1,690 858 293 195 159 148 138 116
28 105 97 152 635 1,670 827 288 193 158 148 138 116
29 104 92 154 644 1,680 812 281 191 157 148 137 116
30 103   156 693 1,650 796 275 189 157 148 135 116
31 103   164   1,620   271 188   150   115