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USGS Surface-Water Daily Statistics for the Nation

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 12324400 Clark Fork ab Little Blackfoot R nr Garrison MT


Powell County, Montana
Hydrologic Unit Code 17010201
Latitude  46°30'39.28", Longitude 112°47'22.87" NAD83
Drainage area 1,130  square miles
Gage datum 4,350 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 2008-10-01 -> 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
1 248 244 241 328 403 800 627 160 153 214 297 282
2 252 236 248 327 396 818 592 158 149 221 301 281
3 250 241 253 324 390 821 553 152 147 226 308 278
4 245 247 263 320 394 800 538 146 147 231 309 277
5 245 253 268 329 397 807 518 144 151 243 308 268
6 254 253 297 334 404 849 493 148 154 246 306 261
7 262 244 290 334 429 885 469 153 157 245 301 253
8 260 243 286 352 440 930 450 154 158 247 299 248
9 261 253 290 358 442 957 426 150 169 251 296 249
10 255 247 312 362 456 912 403 146 178 255 296 251
11 248 243 314 361 448 865 387 148 177 257 294 258
12 249 242 304 358 439 825 366 150 173 261 288 265
13 246 255 300 358 438 840 348 148 171 266 287 267
14 242 258 298 359 438 857 354 150 170 271 291 262
15 238 266 304 351 445 819 355 152 174 273 291 261
16 239 270 320 338 477 805 335 153 180 277 292 255
17 250 266 323 332 525 864 316 151 182 282 293 259
18 261 264 321 325 568 893 299 147 181 281 292 264
19 265 257 318 325 584 901 277 145 184 282 289 270
20 255 253 313 334 619 882 259 141 189 288 289 268
21 249 244 304 346 650 861 243 142 190 287 286 266
22 256 238 312 361 642 826 229 144 190 291 279 258
23 254 239 323 380 648 779 216 150 190 292 282 254
24 252 243 318 390 670 738 207 165 190 292 281 258
25 261 236 317 400 722 718 196 164 188 295 282 259
26 262 233 332 408 729 700 186 163 190 296 275 261
27 258 232 342 416 754 668 186 159 192 298 281 263
28 253 236 340 408 758 654 186 156 195 297 293 265
29 249 283 331 398 761 645 180 153 199 295 289 261
30 253   324 398 764 647 169 151 208 298 282 256
31 248   326   772   162 151   300   255