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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 11528700 SF TRINITY R BL HYAMPOM CA


Trinity County, California
Hydrologic Unit Code 18010212
Latitude  40°39'00", Longitude 123°29'35" NAD27
Drainage area 764  square miles
Gage datum 1,211.96 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 1965-10-01 -> 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 2,650 2,680 3,200 2,730 1,480 728 261 108 71 73 183 1,120
2 2,450 2,760 3,080 2,550 1,420 678 252 105 70 73 193 1,380
3 1,980 2,760 3,120 2,380 1,360 642 243 103 68 75 202 1,240
4 2,180 2,590 2,930 2,220 1,310 621 235 101 67 74 193 1,290
5 2,190 2,650 2,910 2,160 1,330 607 228 98 66 75 205 1,460
6 2,120 2,800 3,060 2,140 1,260 585 221 96 66 75 232 1,280
7 1,950 3,280 2,950 2,240 1,220 564 213 95 65 75 268 1,360
8 2,460 2,990 3,200 2,160 1,200 544 207 93 63 75 286 1,370
9 3,090 3,070 3,510 2,100 1,190 526 203 91 63 77 328 1,410
10 2,750 2,870 3,420 2,050 1,150 505 196 89 65 83 504 1,830
11 2,730 2,580 3,260 2,170 1,090 483 191 88 64 86 616 1,610
12 3,320 2,650 3,300 2,150 1,050 467 185 86 63 85 574 1,620
13 3,940 2,980 3,700 2,140 1,020 455 179 84 62 84 513 1,500
14 4,310 3,320 3,810 2,080 990 439 173 83 61 88 494 1,810
15 4,070 3,150 3,490 1,940 976 428 168 81 61 92 537 2,050
16 4,940 3,370 3,430 1,870 958 411 164 80 62 107 672 2,000
17 4,550 4,100 3,230 1,870 939 399 160 78 65 110 677 1,860
18 3,730 4,100 3,310 1,850 1,000 391 158 77 68 102 635 1,560
19 3,530 4,010 3,160 1,780 1,010 382 156 77 73 104 596 2,240
20 3,890 3,950 2,940 1,740 938 370 152 77 74 110 611 2,110
21 3,940 3,600 2,870 1,730 904 353 146 78 71 107 569 2,320
22 3,480 3,220 3,030 1,690 892 338 142 78 68 116 649 2,070
23 3,380 3,030 3,000 1,680 853 325 138 77 68 151 783 1,870
24 3,400 2,780 3,000 1,700 811 315 134 76 68 192 854 1,730
25 2,930 2,690 3,170 1,640 783 307 130 75 68 260 779 1,580
26 3,750 3,000 3,210 1,570 759 301 126 74 71 203 677 1,540
27 3,670 3,520 2,840 1,560 763 296 122 73 79 170 743 1,980
28 3,070 3,480 2,880 1,580 757 286 118 71 75 176 800 2,630
29 3,050 3,970 2,870 1,570 724 280 115 70 73 197 818 2,600
30 2,930   3,210 1,520 707 270 112 74 75 210 1,040 2,990
31 2,680   2,870   774   110 74   216   3,370