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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.


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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 -> 2026-09-30)

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
1 159 179 262 282 551 1,770 945 194 157 241 244 190
2 159 177 260 299 568 1,760 899 187 159 242 239 187
3 158 174 264 288 575 1,740 844 184 167 242 234 188
4 158 174 275 269 589 1,770 796 187 165 242 233 191
5 159 178 297 263 624 1,830 766 182 170 244 234 185
6 163 187 299 279 682 1,870 711 179 172 242 234 177
7 166 188 297 289 753 1,920 666 174 171 246 230 173
8 167 200 298 290 815 1,950 619 170 174 252 227 170
9 167 194 298 291 829 1,960 573 164 180 249 226 168
10 168 190 296 298 851 1,950 532 162 185 246 221 172
11 166 189 298 311 890 1,890 497 164 188 246 218 176
12 163 199 325 328 920 1,830 476 161 193 247 216 179
13 165 214 342 325 891 1,760 450 159 197 254 219 175
14 168 234 337 311 934 1,740 422 159 207 248 220 172
15 171 238 330 311 978 1,810 390 163 212 247 215 171
16 176 227 316 318 1,020 1,860 361 163 216 251 214 171
17 178 220 309 327 1,110 1,850 343 163 218 253 214 171
18 174 214 325 335 1,290 1,760 325 162 216 255 214 168
19 172 214 355 347 1,470 1,640 303 171 219 256 212 166
20 173 215 345 354 1,390 1,570 292 164 222 249 211 165
21 175 217 316 351 1,420 1,500 285 163 228 249 204 165
22 177 211 309 359 1,530 1,450 280 165 231 246 198 165
23 178 220 298 381 1,530 1,420 262 162 237 244 196 165
24 178 218 290 409 1,540 1,370 248 168 237 242 200 167
25 181 228 287 463 1,590 1,340 239 165 243 242 200 168
26 180 245 272 503 1,650 1,270 235 161 239 242 197 167
27 179 258 270 491 1,630 1,200 226 159 238 240 195 168
28 176 253 268 530 1,680 1,130 222 156 240 237 194 166
29 174 375 263 554 1,800 1,070 214 156 241 236 196 165
30 181   255 542 1,860 1,000 205 158 241 236 192 161
31 184   257   1,810   198 156   240   161