Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

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 14203500 TUALATIN RIVER NEAR DILLEY, OR


Washington County, Oregon
Hydrologic Unit Code 17090010
Latitude  45°28'30", Longitude 123°07'23" NAD27
Drainage area 125  square miles
Gage datum 147.57 feet above NGVD29
Output formats
HTML table of all data
Tab-separated data
Reselect output format

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 -> 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
1 785 914 649 578 239 122 104 116 111 103 177 662
2 805 903 655 524 242 123 105 120 116 104 177 714
3 808 894 645 481 249 122 106 119 113 102 177 766
4 814 854 641 448 247 122 107 119 113 96 180 779
5 842 791 628 469 246 121 106 119 116 99 175 744
6 858 857 624 459 246 120 104 119 113 100 173 706
7 874 904 607 440 238 123 105 118 114 102 187 714
8 907 917 615 433 225 120 105 118 113 98 191 693
9 892 840 654 433 213 118 109 117 113 109 200 659
10 872 829 677 432 202 115 109 117 113 115 211 729
11 860 790 684 421 194 112 111 118 113 119 234 728
12 884 771 684 405 189 113 111 119 112 118 282 777
13 988 811 674 400 187 112 112 119 112 110 296 825
14 1,080 747 683 386 183 110 110 120 112 112 309 832
15 1,110 715 706 375 178 109 110 120 112 109 334 838
16 1,080 760 714 360 173 106 109 119 111 113 357 846
17 1,020 853 682 351 169 105 110 119 109 109 354 834
18 1,000 834 644 333 171 103 109 119 107 117 369 803
19 998 825 615 322 166 102 109 118 107 121 410 809
20 993 799 603 321 159 102 109 117 106 126 443 855
21 999 767 576 312 154 102 109 115 103 126 451 943
22 922 785 576 300 151 99 110 115 100 136 456 1,040
23 917 750 571 310 148 100 111 114 99 143 483 993
24 928 730 588 318 143 100 112 113 100 137 562 874
25 1,010 730 608 290 140 102 113 114 100 131 642 844
26 996 713 564 273 137 101 112 116 100 125 664 808
27 919 688 545 273 135 102 113 115 100 129 671 838
28 898 682 548 273 134 103 117 114 101 143 628 907
29 916 733 560 255 130 105 117 113 103 145 609 878
30 881   597 239 125 103 117 111 104 148 595 848
31 870   603   122   115 111   164   819