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USGS 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 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 3,429 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 -> 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 1,770 954 194 157 242 245 191
2 159 177 257 299 567 1,750 907 187 160 243 241 188
3 157 175 262 288 575 1,730 852 184 167 244 235 188
4 158 174 272 269 589 1,770 803 187 166 244 234 192
5 159 178 295 263 623 1,830 772 182 171 245 236 186
6 163 187 298 280 679 1,880 716 180 173 242 236 178
7 166 188 296 289 752 1,930 671 175 172 246 232 173
8 167 200 297 291 815 1,960 624 170 175 253 228 170
9 167 193 297 291 829 1,970 578 164 181 250 228 169
10 168 189 295 298 850 1,960 537 162 187 247 222 173
11 166 188 297 312 887 1,900 501 164 189 247 219 176
12 163 199 325 330 914 1,840 480 162 194 247 217 179
13 165 213 343 325 882 1,770 453 159 199 254 220 175
14 167 233 339 312 923 1,750 425 159 208 248 221 172
15 171 237 332 312 968 1,820 393 163 213 248 216 171
16 176 226 318 319 1,010 1,870 362 163 217 251 215 171
17 177 219 310 327 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 1,660 304 171 220 255 213 166
20 174 214 347 355 1,370 1,590 292 165 223 249 212 165
21 176 216 317 351 1,410 1,510 286 164 229 249 205 165
22 178 209 310 360 1,530 1,460 281 166 233 246 199 164
23 178 218 298 382 1,530 1,430 263 163 239 246 196 164
24 178 216 291 411 1,540 1,380 249 169 239 244 201 166
25 182 226 287 466 1,590 1,350 240 166 244 244 201 167
26 181 244 271 506 1,650 1,280 236 162 240 243 198 166
27 180 256 270 494 1,640 1,210 227 160 239 241 196 167
28 177 250 268 533 1,680 1,140 223 157 242 238 195 166
29 175 375 263 548 1,810 1,080 215 157 243 238 197 164
30 182   254 539 1,860 1,010 206 158 242 237 193 160
31 184   257   1,810   198 156   241   160