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USGS Daily Statistics for Wyoming

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Questions or concerns about USGS data and data products in Wyoming and Montana 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 1,453  square miles
Gage datum 3,431.00 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 1960-10-01 -> 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
1 159 179 260 282 549 1,770 954 194 157 242 245 190
2 159 177 257 299 567 1,750 907 187 160 243 240 187
3 158 175 262 288 575 1,730 852 184 167 244 234 188
4 158 174 272 269 589 1,770 803 187 166 244 234 191
5 159 178 295 263 623 1,830 772 182 171 245 235 185
6 163 187 298 280 679 1,880 716 180 173 242 235 177
7 166 188 296 289 752 1,930 671 175 172 246 231 173
8 167 200 297 291 815 1,960 624 170 175 253 227 170
9 167 193 297 291 829 1,970 578 164 181 250 227 168
10 168 189 295 298 850 1,960 537 162 187 247 221 172
11 166 188 297 312 887 1,900 501 164 189 247 218 176
12 163 199 325 330 914 1,840 480 162 194 247 216 179
13 165 213 343 325 882 1,770 453 159 199 254 219 175
14 168 233 339 312 923 1,750 425 159 208 248 221 172
15 171 237 332 312 968 1,820 393 163 213 248 215 171
16 176 226 318 319 1,010 1,870 362 163 217 251 215 171
17 178 219 310 327 1,100 1,860 342 164 219 253 215 171
18 174 214 326 336 1,290 1,770 325 162 217 255 215 168
19 172 214 357 347 1,470 1,660 304 171 220 255 212 166
20 173 214 347 355 1,370 1,590 292 165 223 249 211 165
21 175 216 317 351 1,410 1,510 286 164 229 249 204 165
22 177 209 310 360 1,530 1,460 281 166 233 246 198 165
23 178 218 298 382 1,530 1,430 263 163 239 245 196 165
24 178 216 291 411 1,540 1,380 249 169 239 243 200 167
25 181 226 287 466 1,590 1,350 240 166 244 243 200 168
26 180 244 271 506 1,650 1,280 236 162 240 242 197 167
27 179 256 270 494 1,640 1,210 227 160 239 240 195 168
28 176 250 268 533 1,680 1,140 223 157 242 237 194 166
29 175 375 263 548 1,810 1,080 215 157 243 237 196 165
30 182   254 539 1,860 1,010 206 158 242 237 192 161
31 184   257   1,810   198 156   240   161