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USGS Daily Statistics for Montana

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Questions or concerns about USGS streamflow data in Montana and Wyoming can be directed to Kirk Miller (kmiller@usgs.gov; 307-775-9168).

Updated June 11, 2020 - USGS water-resources monitoring activities will be restored at the following sites:
  • 12323600 Silver Bow Creek at Opportunity, Montana (POR: 31 years)
  • 12323750 Silver Bow Creek at Warm Springs, Montana (POR: 35 years)

Updated May 12, 2020 - USGS water-resources monitoring activities were suspended effective June 1, 2020 at the following site:
  • 06088500 Muddy Creek near Vaughn, Montana (POR: 82 years)
USGS monitoring activities at this site was funded by our partner and USGS Cooperative Matching Funds (06088500). Lack of partner funding for this site resulted in suspension of all USGS monitoring activities. Efforts are ongoing to secure funding for future monitoring. Historical data will continue to be available from USGS.

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 06079000 South Fork Sun River near Augusta MT


Lewis And Clark County, Montana
Hydrologic Unit Code 10030104
Latitude  47°37'42.99", Longitude 112°51'56.74" NAD83
Drainage area 251  square miles
Gage datum 4,730 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 1910-10-01 -> 2020-09-30)

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 80 76 93 248 653 2,090 752 175 109 90 140 114
2 81 74 92 244 691 2,080 724 169 110 91 135 116
3 83 74 90 239 768 1,980 662 164 107 96 134 120
4 83 73 91 237 847 1,880 635 168 109 95 130 130
5 85 76 88 234 1,000 1,820 595 158 111 94 128 119
6 87 78 87 231 1,150 1,700 556 155 113 93 125 109
7 88 83 88 249 1,270 1,610 525 172 112 93 126 107
8 87 90 87 274 1,250 1,610 477 166 111 97 123 105
9 85 103 85 303 1,290 1,550 443 155 114 99 122 106
10 81 115 85 325 1,270 1,470 414 151 113 100 124 111
11 79 124 85 320 1,240 1,310 399 147 112 104 116 105
12 81 125 89 331 1,200 1,260 367 140 110 103 106 101
13 82 126 94 340 1,220 1,400 345 137 108 102 102 101
14 79 127 110 330 1,210 1,400 333 133 106 102 102 99
15 78 128 202 308 1,320 1,280 326 137 105 105 107 99
16 77 131 309 291 1,520 1,230 307 132 104 110 112 103
17 75 133 260 296 1,580 1,330 289 132 102 113 109 101
18 75 126 234 318 1,670 1,340 278 125 102 111 110 103
19 74 118 274 360 1,760 1,570 260 123 102 109 110 99
20 71 114 243 501 1,720 1,340 253 121 100 107 109 98
21 70 109 231 584 1,670 1,250 247 122 99 109 107 98
22 70 107 227 670 1,630 1,230 238 121 101 113 108 95
23 69 106 230 754 1,740 1,150 232 121 99 113 131 95
24 70 105 223 725 1,930 1,080 223 122 98 114 175 95
25 71 103 214 674 2,000 1,020 216 117 96 112 145 93
26 73 99 206 631 2,140 965 207 114 96 114 129 93
27 77 97 208 623 2,190 887 207 112 97 119 125 92
28 78 96 226 658 2,050 838 199 109 98 121 122 90
29 80 78 226 706 2,070 794 191 106 98 119 121 86
30 79   227 663 2,040 771 184 104 97 117 121 81
31 77   243   2,040   178 107   127   81