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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 12087000 MASHEL RIVER NEAR LA GRANDE, WA


Pierce County, Washington
Hydrologic Unit Code 17110015
Latitude  46°51'25", Longitude 122°18'05" NAD27
Drainage area 80.7  square miles
Gage datum 623.04 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 1940-10-01 -> 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
1 403 413 343 344 244 181 93 23 21 74 236 423
2 410 398 305 332 247 170 84 23 19 54 210 436
3 419 322 316 301 247 161 78 22 20 62 199 461
4 404 343 323 292 243 149 72 21 22 70 221 428
5 462 378 310 301 250 150 67 21 24 71 214 397
6 498 510 284 308 258 157 62 20 35 55 227 394
7 595 520 287 310 251 162 56 21 25 51 309 352
8 491 503 257 314 231 159 55 22 25 61 244 376
9 406 460 312 323 227 156 65 20 23 85 190 473
10 389 363 394 316 223 165 60 19 24 97 198 445
11 403 317 352 344 214 175 54 19 25 93 222 536
12 397 319 363 332 208 159 48 18 24 83 341 493
13 410 305 367 338 197 165 44 20 22 69 329 477
14 363 292 356 345 193 171 42 19 25 76 338 450
15 339 322 415 314 232 184 40 18 32 75 319 403
16 367 363 389 310 223 187 43 19 38 79 318 397
17 372 388 333 315 221 172 46 19 41 98 357 426
18 464 340 329 293 213 156 41 18 43 104 359 415
19 391 335 345 287 209 156 39 18 36 117 379 437
20 377 315 356 307 195 146 47 17 36 129 347 544
21 412 348 329 285 189 134 44 17 33 119 332 497
22 393 435 338 260 212 125 37 19 32 140 401 426
23 380 379 356 269 203 117 37 19 30 128 434 396
24 434 409 337 282 193 116 36 22 35 115 409 372
25 438 386 372 265 184 108 32 30 34 126 533 336
26 374 369 325 254 192 98 30 35 37 135 469 330
27 311 324 326 244 204 100 29 33 42 152 454 382
28 351 350 327 242 217 101 29 26 48 150 451 411
29 360 323 350 239 211 104 28 22 58 155 380 477
30 457   372 246 183 95 27 22 80 159 378 444
31 450   349   192   25 20   224   397