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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 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 -> 2021-09-30)

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 3,890 3,680 3,260 2,380 1,000 441 206 99 114 172 464 2,220
2 3,910 3,650 3,180 2,320 966 431 198 98 113 175 504 2,290
3 3,830 3,640 3,100 2,280 946 422 190 96 115 172 525 2,400
4 3,760 3,580 3,020 2,230 931 420 185 96 118 171 541 2,510
5 3,660 3,520 2,950 2,170 918 413 182 95 118 166 559 2,570
6 3,670 3,610 2,890 2,090 914 407 178 94 125 167 576 2,620
7 3,690 3,620 2,840 2,000 897 405 171 95 125 171 598 2,670
8 3,630 3,660 2,780 1,950 867 406 164 97 122 174 618 2,690
9 3,590 3,760 2,770 1,900 830 402 162 99 122 180 650 2,680
10 3,600 3,780 2,770 1,850 804 393 157 98 125 197 686 2,700
11 3,630 3,680 2,740 1,800 774 382 155 95 130 222 729 2,730
12 3,650 3,600 2,750 1,750 743 360 150 96 127 228 773 2,780
13 3,710 3,570 2,790 1,740 712 342 145 98 123 226 820 2,840
14 3,790 3,500 2,820 1,710 689 331 142 97 123 223 859 2,860
15 3,830 3,450 2,880 1,680 680 322 138 97 131 227 923 2,880
16 3,800 3,480 2,920 1,640 664 312 133 97 135 222 1,030 2,980
17 3,890 3,520 2,920 1,590 656 302 132 99 140 224 1,090 3,060
18 4,080 3,550 2,900 1,550 643 291 133 99 147 230 1,150 3,080
19 4,140 3,610 2,860 1,490 635 279 131 98 157 235 1,270 3,130
20 4,160 3,630 2,790 1,430 620 269 128 100 158 255 1,390 3,260
21 4,150 3,590 2,700 1,370 606 267 124 104 155 270 1,430 3,450
22 4,120 3,570 2,630 1,310 600 263 120 107 149 289 1,500 3,630
23 4,120 3,540 2,570 1,270 595 252 114 112 145 306 1,590 3,750
24 4,090 3,520 2,510 1,240 577 241 110 112 143 324 1,710 3,750
25 4,030 3,470 2,480 1,200 559 238 108 111 142 322 1,830 3,720
26 3,960 3,400 2,430 1,160 533 233 107 114 142 322 1,930 3,650
27 3,950 3,370 2,390 1,130 518 227 106 115 141 335 2,020 3,700
28 3,920 3,340 2,370 1,100 505 221 104 113 142 346 2,100 3,690
29 3,850 3,390 2,400 1,070 493 216 100 113 151 363 2,150 3,770
30 3,750   2,420 1,040 475 213 101 114 166 387 2,180 3,850
31 3,690   2,420   455   101 116   418   3,900