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USGS Daily Statistics for Oregon

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 14153500 COAST FORK WILLAMETTE R BLW COTTAGE GROVE DAM, OR


Lane County, Oregon
Hydrologic Unit Code 17090002
Latitude  43°43'15", Longitude 123°02'55" NAD27
Drainage area 104  square miles
Gage datum 711.00 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 1939-10-01 -> 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
1 594 475 323 330 130 153 68 57 94 209 216 466
2 585 481 305 314 143 154 63 59 111 209 202 489
3 557 428 312 287 154 147 61 61 124 207 187 522
4 518 385 325 250 170 139 60 63 135 207 180 500
5 535 373 335 250 162 138 59 65 144 204 182 495
6 501 365 325 239 163 132 57 66 157 206 173 504
7 496 331 318 225 176 138 56 70 166 206 158 552
8 508 331 316 246 165 127 55 74 171 206 158 542
9 574 349 323 258 157 120 55 79 178 206 169 475
10 594 349 342 261 160 119 54 82 183 201 196 500
11 585 372 339 262 164 123 54 83 186 202 200 502
12 608 363 316 265 149 127 54 86 184 206 209 494
13 591 343 320 268 131 120 53 88 192 205 204 489
14 590 344 320 254 125 109 53 90 192 211 244 514
15 606 344 348 223 125 99 54 93 184 219 260 537
16 580 366 363 201 134 94 54 96 189 218 260 537
17 553 398 337 196 158 89 53 97 209 218 269 525
18 558 434 321 187 158 86 54 98 210 216 289 518
19 544 470 326 182 151 87 56 99 201 221 318 477
20 542 480 303 177 154 86 56 101 211 227 338 430
21 594 422 278 174 157 84 55 102 211 228 357 412
22 658 347 292 178 144 80 54 100 210 234 395 453
23 625 330 317 175 134 77 54 101 211 230 390 523
24 640 342 320 176 133 77 55 98 213 231 403 571
25 655 361 322 181 142 79 55 99 208 228 439 545
26 636 343 308 164 150 83 54 97 208 225 456 495
27 551 342 300 158 147 84 54 94 203 230 461 508
28 490 337 311 149 139 85 55 94 209 242 463 533
29 468 403 320 133 147 87 56 95 209 223 463 596
30 453   296 133 144 79 56 96 208 214 442 652
31 449   327   141   57 95   221   646