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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 06209500 Rock Creek near Red Lodge MT


Carbon County, Montana
Hydrologic Unit Code 10070006
Latitude  45°05'10.13", Longitude 109°19'45.08" NAD83
Drainage area 108  square miles
Gage datum 6,400 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 1999-10-01 -> 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 33 28 25 27 53 407 519 288 190 100 59 41
2 33 28 25 26 56 420 514 282 185 98 59 41
3 33 28 25 26 59 454 510 279 180 97 59 41
4 32 28 25 27 60 492 516 273 177 93 57 40
5 32 28 25 27 63 555 507 271 174 90 56 40
6 32 28 25 27 68 585 504 265 171 88 55 39
7 32 28 26 28 71 571 489 260 168 87 56 39
8 32 27 25 29 74 532 479 252 165 86 56 39
9 32 27 25 29 80 518 475 247 161 81 55 38
10 32 27 25 29 85 543 470 242 158 80 53 38
11 31 27 25 30 87 507 471 240 154 78 52 38
12 31 27 25 30 93 495 464 240 151 78 51 37
13 31 26 25 31 106 539 459 237 148 76 50 37
14 31 26 25 32 117 506 452 234 148 76 50 37
15 30 25 25 31 119 493 443 229 151 75 50 37
16 29 26 25 31 129 504 430 222 144 74 49 37
17 29 26 26 32 151 502 420 221 139 73 49 37
18 29 26 26 32 166 511 412 221 138 70 48 37
19 30 26 26 32 207 503 402 219 136 70 48 37
20 30 26 26 33 252 485 386 219 134 70 47 36
21 30 25 26 34 257 475 373 215 130 67 46 36
22 29 25 26 36 248 486 364 218 126 66 46 35
23 29 26 26 39 262 492 360 221 123 65 46 35
24 29 25 26 40 265 510 354 220 120 64 45 35
25 29 25 26 41 266 516 347 215 117 63 44 35
26 29 25 26 42 278 511 336 212 113 62 44 35
27 28 26 26 43 295 508 325 210 110 60 43 35
28 28 26 26 44 343 499 319 205 108 60 42 34
29 28 26 26 47 376 519 311 201 105 60 43 34
30 28   26 50 374 528 301 197 105 59 42 34
31 28   26   397   293 194   59   34