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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 06306300 Tongue River at State Line nr Decker MT


Big Horn County, Montana
Hydrologic Unit Code 10090101
Latitude  45°00'32.89", Longitude 106°50'09.40" NAD83
Drainage area 1,451  square miles
Gage datum 3,429 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 1960-10-01 -> 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
1 159 179 260 283 550 1,770 962 195 157 244 245 191
2 159 177 257 301 569 1,760 913 188 160 245 241 188
3 157 175 262 290 577 1,740 857 185 168 245 235 188
4 158 174 272 270 592 1,780 808 188 166 246 234 192
5 159 178 295 264 627 1,830 777 183 172 247 236 186
6 163 187 299 280 683 1,880 720 181 174 243 236 178
7 166 188 297 289 753 1,920 676 175 173 247 232 173
8 167 200 298 290 818 1,960 627 171 176 255 228 170
9 167 193 298 290 831 1,960 581 164 182 252 228 169
10 168 189 296 298 852 1,950 540 161 188 249 222 173
11 166 188 298 312 890 1,890 504 164 191 249 219 176
12 163 199 327 330 916 1,830 483 161 196 249 217 179
13 165 213 345 326 882 1,760 456 159 200 256 220 175
14 167 233 341 310 920 1,740 427 159 209 250 221 172
15 171 237 333 308 960 1,830 395 164 214 250 216 171
16 176 226 319 316 1,000 1,880 365 163 218 253 215 171
17 177 219 312 323 1,100 1,870 344 164 220 254 215 171
18 174 214 328 333 1,290 1,780 327 163 218 256 215 168
19 172 214 359 346 1,470 1,660 305 172 221 256 213 166
20 174 214 349 354 1,370 1,600 294 166 224 250 212 165
21 176 216 319 351 1,410 1,520 287 165 230 250 205 165
22 178 209 311 360 1,540 1,470 282 166 234 247 199 164
23 178 218 299 382 1,540 1,440 265 164 240 246 196 164
24 178 216 292 412 1,540 1,390 250 170 240 244 201 166
25 182 226 288 467 1,600 1,360 241 167 246 244 201 167
26 181 244 273 507 1,660 1,290 238 163 242 243 198 166
27 180 256 271 494 1,640 1,220 229 160 241 241 196 167
28 177 250 269 534 1,690 1,150 225 157 244 238 195 166
29 175 375 264 549 1,820 1,090 217 157 244 238 197 164
30 182   255 540 1,870 1,020 207 159 244 237 193 160
31 184   258   1,810   200 157   241   160