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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 -> 2024-09-30)

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
1 404 417 343 344 244 181 93 23 21 75 238 429
2 412 403 305 332 247 170 84 23 20 55 211 442
3 420 326 316 301 247 161 78 22 20 63 199 468
4 406 348 323 292 243 149 72 21 22 71 220 435
5 462 383 310 301 250 150 67 21 24 72 214 403
6 500 518 284 308 258 157 62 20 35 56 229 400
7 600 528 287 310 251 162 56 21 25 52 312 355
8 495 511 257 314 231 159 55 22 25 61 247 375
9 409 467 312 323 227 156 65 20 23 87 192 475
10 391 368 394 316 223 165 60 19 24 98 201 448
11 405 322 352 344 214 175 54 19 25 95 222 542
12 399 324 363 332 208 159 48 18 21 84 343 499
13 413 310 367 338 197 165 44 20 22 70 329 482
14 365 296 356 345 193 171 42 19 25 78 334 452
15 342 327 415 314 232 184 40 18 32 76 316 405
16 371 368 389 310 223 187 43 19 39 80 317 399
17 376 390 333 315 221 172 46 19 42 99 355 428
18 471 341 329 293 213 156 41 18 44 105 357 411
19 397 335 345 287 209 156 39 18 36 119 380 436
20 382 314 356 307 195 146 47 17 36 131 347 547
21 417 349 329 285 189 134 44 17 33 120 333 500
22 399 437 338 260 212 125 37 19 32 141 402 428
23 385 375 356 269 203 117 37 19 30 130 436 396
24 441 405 337 282 193 116 36 22 35 116 412 371
25 445 375 372 265 184 108 32 30 35 127 537 335
26 379 369 325 254 192 98 30 35 37 137 473 317
27 316 324 326 244 204 100 29 33 42 148 459 377
28 356 350 327 242 217 101 29 26 48 146 456 408
29 365 323 350 239 211 104 28 22 59 154 384 476
30 465   372 246 183 95 27 22 82 159 383 444
31 457   349   192   25 20   226   397