11478500 VAN DUZEN RIVER NEAR BRIDGEVILLE, CA
LOCATION.-Lat 40°28'50", long 123°53'23", in NE 1/4 SE 1/4 sec.12, T.1 N., R.2 E., Humboldt County,
Hydrologic Unit 18010105, on left bank, at downstream side of bridge on State Highway 36, 0.9 mi upstream from
Grizzly Creek, and 5 mi west of Bridgeville.
DRAINAGE AREA.-222 mi2.
PERIOD OF RECORD.-October 1950 to current year.
REVISED RECORDS.-WSP 1735: Drainage area.
GAGE.-Water-stage recorder and crest-stage gage. Datum of gage is 358.18 ft above sea level. Prior to Oct. 1,
1965, at site 2.4 mi upstream at different datum.
REMARKS.-Records good except for estimated daily discharges, which are fair. No storage or large diversion
upstream from station. See schematic diagram of Eel River Basin.
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 48,700 ft3/s, Dec. 22, 1964, gage height, 24.0 ft,
from floodmarks, present site and datum, from rating curve extended above 20,000 ft3/s on basis of
slope-area measurement at gage height 21.3 ft, former site and datum; minimum daily, 4.4 ft3/s, Sept.
28, 1992.
EXTREMES FOR CURRENT YEAR.-Peak discharges greater than base discharge of 15,000 ft3/s, or maximum:
Discharge Gage height Discharge Gage height
Date Time (ft3/s) (ft) Date Time (ft3/s) (ft)
Nov. 23 1300 18,900 12.19
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 12 31 5780 e450 686 5270 1350 463 283 56 18 9.5
2 12 34 7390 e400 573 3210 1340 538 264 53 17 9.7
3 12 31 7780 e355 532 3980 1220 1120 236 51 17 9.9
4 12 30 3630 e320 565 2330 1010 1090 211 51 17 9.8
5 12 33 2140 283 512 1730 1010 791 192 50 17 9.4
6 12 55 1610 263 3970 1440 1030 703 179 49 18 9.1
7 12 216 1290 248 9640 1240 987 683 168 46 19 8.9
8 12 364 1560 232 5580 1440 1190 602 162 45 20 8.8
9 12 218 1200 217 5370 1500 1070 537 154 43 21 8.6
10 13 137 993 206 2800 1280 1240 491 147 40 20 8.4
11 13 262 893 196 1860 1170 1610 481 139 38 18 8.2
12 13 179 883 188 1560 1120 1570 509 134 37 18 8.1
13 18 119 1010 181 1630 1110 1600 497 128 34 17 7.8
14 18 91 1090 182 1910 1770 1570 460 123 32 17 7.6
15 18 79 917 806 1510 1610 1530 429 118 30 16 7.4
16 16 96 794 1410 2260 1420 1440 391 115 29 16 7.4
17 15 930 693 2410 5040 1290 1420 376 109 28 15 7.4
18 15 550 617 5820 5020 1180 1330 413 106 28 15 7.3
19 15 273 549 4220 4050 1120 1230 439 99 28 14 7.3
20 15 187 524 4700 2870 1190 1090 446 95 26 14 7.1
21 14 4130 450 4350 3000 1220 938 430 92 26 13 7.0
22 14 4130 412 4550 2630 1150 802 433 89 25 13 7.0
23 13 9070 386 6400 4800 1250 714 483 85 24 12 6.8
24 28 5670 360 3070 4300 4120 e720 493 80 24 12 6.7
25 49 e3400 345 1940 5290 4470 e715 482 77 23 11 6.7
26 50 e3900 428 1510 3190 2210 e690 461 74 23 10 6.7
27 37 e2450 428 1190 3100 1590 673 440 72 22 10 6.6
28 31 1430 429 1040 9670 1340 579 400 70 21 10 6.7
29 27 2170 398 863 --- 1230 497 363 65 20 9.8 6.7
30 25 7830 349 722 --- 1310 453 336 58 19 9.8 6.8
31 25 --- e420 798 --- 1360 --- 310 --- 19 9.6 ---
TOTAL 590 48095 45748 49520 93918 57650 32618 16090 3924 1040 464.2 235.4
MEAN 19.0 1603 1476 1597 3354 1860 1087 519 131 33.5 15.0 7.85
MAX 50 9070 7780 6400 9670 5270 1610 1120 283 56 21 9.9
MIN 12 30 345 181 512 1110 453 310 58 19 9.6 6.6
AC-FT 1170 95400 90740 98220 186300 114300 64700 31910 7780 2060 921 467
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 1999, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 148 908 1872 2299 2055 1646 932 447 144 36.6 17.2 19.9
MAX 1464 5476 6046 6608 6232 5015 3255 1139 821 98.0 82.4 144
(WY) 1963 1974 1956 1995 1958 1995 1963 1953 1993 1953 1983 1986
MIN 7.20 16.8 18.8 103 156 172 131 109 40.4 12.2 5.89 5.72
(WY) 1988 1960 1977 1977 1977 1988 1977 1985 1987 1977 1977 1992
SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1951 - 1999
ANNUAL TOTAL 509021 349892.6
ANNUAL MEAN 1395 959 872
HIGHEST ANNUAL MEAN 1610 1974
LOWEST ANNUAL MEAN 95.7 1977
HIGHEST DAILY MEAN 14100 Jan 17 9670 Feb 28 33900 Dec 22
1964
LOWEST DAILY MEAN 11 Sep 16 6.6 Sep 27 4.4 Sep 28
1992
ANNUAL SEVEN-DAY MINIMUM 11 Sep 14 6.7 Sep 23 4.6 Aug 13
1977
INSTANTANEOUS PEAK FLOW 18900 Nov 23 48700 Dec 22
1964
INSTANTANEOUS PEAK STAGE 12.19 Nov 23 24.00 Dec 22
1964
ANNUAL RUNOFF (AC-FT) 1010000 694000 631900
10 PERCENT EXCEEDS 4150 3030 2160
50 PERCENT EXCEEDS 423 336 182
90 PERCENT EXCEEDS 13 11 12
USGS Water Resources of California
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