11527000 TRINITY RIVER NEAR BURNT RANCH, CA
LOCATION.--Lat 40°47'20", long 123°26'20", in S 1/2 sec.19, T.5 N., R.7 E., Trinity County, Hydrologic Unit
18010211, Trinity National Forest, on left bank 500 ft upstream from Cedar Flat Creek, 700 ft upstream from
highway bridge at Cedar Flat, and 2.3 mi southeast of town of Burnt Ranch.
DRAINAGE AREA.--1,439 mi2.
PERIOD OF RECORD.--October 1931 to September 1940, October 1956 to current year. Monthly discharge only for some
periods, published in WSP 1315-B.
REVISED RECORDS.--WDR CA-78-2: 1975(M). WSP 1929: Drainage area.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 944.05 ft above sea level. Oct. 1, 1931, to
Jan. 19, 1940, at site 2 mi upstream at different datum.
REMARKS.--Records excellent. Flow regulated since November 1960 by Clair Engle Lake (station 11525400), 64 mi
upstream, and by transbasin diversion to Judge Francis Carr Powerplant (station 11525430) since April 1963.
Small diversions upstream from station for irrigation. See schematic diagram of Klamath River and Trinity
River basins.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 81,500 ft3/s, Feb. 25, 1958, gage height, 30.50 ft, from
rating curve extended above 40,000 ft3/s on basis of slope-area measurement at gage height 43.2 ft; minimum,
82 ft3/s, Aug. 31, 1939.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Dec. 22, 1955, reached a stage of 43.2 ft, from floodmarks,
discharge, 172,000 ft3/s, on basis of slope-area measurement of peak flow.
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 12,000 ft3/s or maximum:
Discharge Gage height Discharge Gage height
Date Time (ft3/s) (ft) Date Time (ft3/s) (ft)
Dec. 12 1115 14,700 13.54 Feb. 20 0315 12,500 12.70
Dec. 30 0915 12,400 12.64
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 603 452 959 3980 3650 4730 2800 2510 2070 1100 697 593
2 598 454 930 3000 3560 4300 2930 2440 2100 1160 681 587
3 591 455 651 2540 3370 4390 2550 2230 2240 1150 675 585
4 588 455 1050 2180 5620 5090 2360 2020 2220 1110 672 583
5 584 450 1380 1900 10700 6160 2260 1880 2070 1010 665 588
6 588 448 1470 1700 9070 5520 2260 1790 1940 985 661 595
7 591 443 962 1560 8110 4970 2380 1750 1980 996 660 572
8 589 444 775 1460 7650 4740 2570 1690 1880 1010 652 555
9 583 447 683 1690 7690 4930 2730 1630 1660 1020 642 553
10 466 446 670 2230 7400 4880 2470 1600 1470 995 637 579
11 446 446 1300 1890 6900 5480 2180 1600 1410 970 630 551
12 451 447 9180 1750 6300 5590 2020 1860 1390 928 629 538
13 454 446 5430 1620 6850 4930 1880 2260 1360 913 626 545
14 446 446 3040 1510 7140 4390 1790 3840 1330 941 623 556
15 456 447 6110 2050 6830 3920 1760 5200 1330 1240 617 605
16 453 455 3710 4250 6840 3690 2110 6240 1330 1150 618 637
17 454 454 2340 5740 8580 3560 2040 7160 1280 931 616 597
18 454 457 1840 4200 9370 3650 1930 7360 1170 862 615 576
19 453 455 1540 4190 10700 3600 1890 6740 1120 824 617 569
20 452 454 1350 4450 11700 3370 1970 6110 1100 798 612 564
21 450 454 1240 4770 11700 3140 1950 4820 1100 768 614 557
22 450 467 1160 3950 11600 2940 2040 4970 1100 761 616 552
23 452 476 1100 3390 10600 2720 2090 4010 1070 774 611 553
24 454 470 1030 3720 9980 2520 4110 3440 1100 767 603 551
25 455 475 973 4330 9240 2360 3740 2890 1050 757 592 548
26 454 607 935 3730 8710 2220 3210 2560 1050 749 588 544
27 455 543 920 3660 7610 2310 2850 2550 1040 739 589 553
28 457 499 966 3480 5890 2980 2520 2350 1030 729 595 550
29 457 506 2490 3110 5530 2520 2370 2240 1000 743 592 550
30 454 498 10800 3090 --- 2310 2410 2120 1030 752 586 550
31 453 --- 6950 3330 --- 2210 --- 2050 --- 726 588 ---
TOTAL 15291 13996 73934 94450 228890 120120 72170 101910 43020 28358 19419 17036
MEAN 493 467 2385 3047 7893 3875 2406 3287 1434 915 626 568
MAX 603 607 10800 5740 11700 6160 4110 7360 2240 1240 697 637
MIN 446 443 651 1460 3370 2210 1760 1600 1000 726 586 538
AC-FT 30330 27760 146600 187300 454000 238300 143100 202100 85330 56250 38520 33790
11527000 TRINITY RIVER NEAR BURNT RANCH, CA--Continued
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1932 - 1960, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 499 1192 1654 2936 5702 5569 5831 5674 3161 878 305 241
MAX 2732 4893 6426 6192 24270 10110 10090 11840 7076 2362 835 497
(WY) 1958 1938 1938 1958 1958 1938 1938 1958 1958 1958 1958 1958
MIN 138 209 253 311 831 2487 3319 1955 808 273 123 111
(WY) 1933 1937 1937 1937 1937 1935 1932 1939 1934 1934 1939 1932
SUMMARY STATISTICS WATER YEARS 1932 - 1960
ANNUAL MEAN 2784
HIGHEST ANNUAL MEAN 6557 1958
LOWEST ANNUAL MEAN 1409 1939
HIGHEST DAILY MEAN 65600 Feb 19 1958
LOWEST DAILY MEAN 93 Sep 13 1939
ANNUAL SEVEN-DAY MINIMUM 95 Oct 1 1931
INSTANTANEOUS PEAK FLOW 81500 Feb 25 1958
INSTANTANEOUS PEAK STAGE 30.50 Feb 25 1958
ANNUAL RUNOFF (AC-FT) 2017000
10 PERCENT EXCEEDS 7120
50 PERCENT EXCEEDS 1240
90 PERCENT EXCEEDS 198
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1964 - 1996, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 471 1093 2116 3080 3026 3339 2415 2110 1426 699 454 417
MAX 804 3570 8745 10990 10190 13770 8146 6343 7006 1985 1087 734
(WY) 1980 1974 1965 1974 1983 1983 1974 1983 1983 1983 1983 1983
MIN 298 375 274 322 373 512 530 547 449 200 189 230
(WY) 1965 1977 1977 1977 1977 1977 1977 1977 1977 1977 1977 1964
SUMMARY STATISTICS FOR 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1964 - 1996
ANNUAL TOTAL 1230311 828594
ANNUAL MEAN 3371 2264 1715
HIGHEST ANNUAL MEAN 4816 1983
LOWEST ANNUAL MEAN 372 1977
HIGHEST DAILY MEAN 25800 Jan 9 11700 Feb 20 52800 Dec 22 1964
LOWEST DAILY MEAN 443 Nov 7 443 Nov 7 165 Aug 24 1966
ANNUAL SEVEN-DAY MINIMUM 446 Nov 7 446 Nov 7 170 Aug 21 1966
INSTANTANEOUS PEAK FLOW 14700 Dec 12 78100 Dec 22 1964
INSTANTANEOUS PEAK STAGE 13.54 Dec 12 29.82 Dec 22 1964
ANNUAL RUNOFF (AC-FT) 2440000 1644000 1242000
10 PERCENT EXCEEDS 8980 5600 3580
50 PERCENT EXCEEDS 1560 1290 947
90 PERCENT EXCEEDS 455 455 341
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