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USGS Surface-Water 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 619.53 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 1940-10-01 -> 2023-09-30)

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
1 409 419 340 351 246 185 96 24 21 77 242 436
2 418 406 303 338 251 174 87 23 20 55 213 442
3 426 328 316 305 250 159 80 23 20 62 201 468
4 411 351 324 296 245 146 74 22 22 71 220 435
5 469 387 312 306 248 148 69 21 24 73 213 383
6 506 524 286 313 254 157 64 21 36 56 229 356
7 608 535 289 312 245 164 57 22 26 53 309 340
8 501 518 259 315 226 161 56 22 25 62 246 370
9 407 473 314 324 224 158 67 21 23 88 192 472
10 389 372 397 308 223 168 62 20 24 100 202 429
11 405 325 353 338 215 179 55 19 26 96 223 539
12 400 325 363 331 210 163 49 18 22 85 345 499
13 416 310 369 340 199 169 45 20 22 71 330 484
14 369 297 358 349 195 176 43 19 25 79 336 455
15 345 329 419 318 236 189 41 18 33 77 319 408
16 375 372 397 314 226 191 44 19 39 81 321 402
17 378 395 338 318 225 176 47 19 42 99 360 433
18 471 345 335 297 217 160 43 18 45 106 362 416
19 391 339 352 291 213 159 40 18 37 120 384 441
20 378 318 363 313 199 150 48 18 37 133 351 555
21 415 353 335 291 192 137 45 18 34 122 337 508
22 396 442 345 265 212 128 38 19 33 144 406 433
23 382 379 361 273 204 120 38 20 31 132 441 401
24 439 410 343 285 195 119 37 22 35 118 417 376
25 443 380 379 268 186 110 33 30 35 129 546 339
26 378 371 331 256 195 101 31 36 37 139 480 319
27 312 326 331 245 208 103 30 33 42 150 466 381
28 352 352 330 244 222 103 30 26 48 148 464 414
29 363 289 355 239 216 107 29 22 59 156 390 483
30 466   380 246 187 98 27 22 83 162 389 451
31 458   357   196   25 20   230   401