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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 2,730 2,660 3,210 2,800 1,480 724 261 108 71 73 182 1,130
2 2,520 2,900 3,090 2,620 1,420 674 252 105 70 73 193 1,370
3 2,100 3,130 3,120 2,440 1,360 638 243 103 68 75 201 1,240
4 2,310 2,960 2,930 2,270 1,310 618 235 101 67 74 192 1,290
5 2,280 2,870 2,910 2,220 1,320 604 228 98 66 75 204 1,460
6 2,190 2,940 3,050 2,190 1,260 582 221 96 66 75 231 1,280
7 2,000 3,370 2,940 2,300 1,220 561 213 95 65 75 266 1,350
8 2,490 3,060 3,180 2,210 1,200 541 207 93 63 75 283 1,370
9 3,100 3,120 3,480 2,140 1,190 526 203 91 63 77 325 1,400
10 2,750 2,910 3,400 2,080 1,140 505 196 89 65 83 498 1,820
11 2,730 2,610 3,230 2,200 1,090 483 191 88 64 86 608 1,590
12 3,310 2,670 3,270 2,180 1,050 467 185 86 63 85 567 1,610
13 3,910 3,010 3,680 2,160 1,020 455 179 84 62 84 508 1,510
14 4,270 3,400 3,790 2,090 987 439 173 83 61 88 491 1,970
15 4,040 3,210 3,470 1,950 972 428 168 81 61 92 534 2,130
16 4,890 3,410 3,440 1,880 955 411 164 80 62 107 665 2,050
17 4,510 4,140 3,320 1,880 935 399 160 78 65 110 669 1,910
18 3,690 4,140 3,360 1,860 996 391 158 77 68 102 628 1,590
19 3,490 4,050 3,190 1,790 1,010 382 156 77 73 104 590 2,260
20 3,840 4,000 2,970 1,750 934 370 152 77 74 110 617 2,130
21 3,900 3,650 2,880 1,730 899 353 146 78 71 106 753 2,350
22 3,440 3,270 3,040 1,690 888 338 142 78 68 115 998 2,100
23 3,340 3,090 3,010 1,680 849 325 138 77 68 150 931 1,900
24 3,360 2,850 3,020 1,700 807 315 134 76 68 191 927 1,860
25 2,900 2,750 3,180 1,640 779 307 130 75 68 258 845 1,690
26 3,700 3,040 3,220 1,570 756 301 126 74 71 201 751 1,640
27 3,620 3,530 2,850 1,550 759 296 122 73 79 169 793 2,120
28 3,030 3,490 2,910 1,580 754 286 118 71 75 175 833 2,770
29 3,020 3,970 2,890 1,570 721 280 115 70 73 195 840 2,830
30 2,900   3,220 1,520 703 270 112 74 75 209 1,050 3,190
31 2,660   2,920   770   110 74   214   3,480