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USGS Surface-Water 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 14207500 TUALATIN RIVER AT WEST LINN, OR


Clackamas County, Oregon
Hydrologic Unit Code 17090010
Latitude  45°21'03", Longitude 122°40'30" NAD27
Drainage area 706  square miles
Gage datum 85.61 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 1928-10-01 -> 2022-09-30)

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 3,900 3,640 3,270 2,370 993 439 207 100 115 174 467 2,210
2 3,910 3,630 3,210 2,310 960 429 198 99 114 176 505 2,290
3 3,850 3,620 3,120 2,270 940 420 190 97 116 173 525 2,390
4 3,790 3,570 3,040 2,210 924 418 186 97 119 171 542 2,500
5 3,690 3,510 2,970 2,150 912 411 182 96 119 167 563 2,550
6 3,700 3,590 2,910 2,070 908 405 179 96 126 168 583 2,600
7 3,720 3,600 2,850 1,990 890 403 171 96 126 172 607 2,660
8 3,690 3,640 2,790 1,940 861 404 165 98 123 175 626 2,680
9 3,660 3,740 2,770 1,890 824 401 162 100 123 181 659 2,660
10 3,680 3,750 2,760 1,840 799 391 157 99 126 198 696 2,690
11 3,700 3,640 2,720 1,780 769 380 155 96 130 222 742 2,730
12 3,730 3,560 2,720 1,740 738 359 150 97 127 228 800 2,790
13 3,800 3,530 2,770 1,730 707 343 146 99 124 226 858 2,860
14 3,860 3,450 2,800 1,700 685 335 142 98 124 223 894 2,880
15 3,900 3,410 2,850 1,660 676 326 138 98 132 227 954 2,900
16 3,880 3,450 2,890 1,630 660 315 134 98 136 223 1,060 3,000
17 3,950 3,500 2,890 1,580 652 304 133 101 141 224 1,110 3,080
18 4,140 3,520 2,870 1,530 639 291 134 100 150 230 1,170 3,100
19 4,180 3,580 2,830 1,480 632 280 131 99 160 235 1,290 3,160
20 4,190 3,600 2,760 1,420 617 269 129 101 163 255 1,400 3,290
21 4,170 3,560 2,670 1,360 602 267 125 105 158 270 1,440 3,480
22 4,130 3,540 2,620 1,300 597 263 121 108 151 291 1,500 3,660
23 4,110 3,510 2,550 1,260 592 252 115 113 147 310 1,590 3,770
24 4,070 3,490 2,500 1,230 575 241 111 113 144 329 1,710 3,780
25 4,010 3,440 2,470 1,190 557 237 109 113 143 327 1,820 3,740
26 3,930 3,380 2,420 1,150 531 233 108 115 143 328 1,920 3,670
27 3,910 3,340 2,370 1,120 517 227 107 116 143 340 2,020 3,730
28 3,890 3,320 2,360 1,090 504 221 105 114 147 350 2,100 3,720
29 3,820 3,390 2,390 1,060 492 216 101 114 156 367 2,140 3,790
30 3,720   2,400 1,030 473 213 102 115 169 391 2,170 3,870
31 3,650   2,400   454   102 117   423   3,920