2000 California Hydrologic Data Report
11471500 EEL RIVER AT VAN ARSDALE DAM, NEAR POTTER VALLEY, CA.
LOCATION - Lat 39°23'19", long 123°06'54", in NE 1/4 sec.30, T.18 N., R.11 W., Mendocino County,
Hydrologic Unit 18010103, on left bank, 1,000 ft downstream from Van Arsdale Dam, and 4.6 mi north of
town of Potter Valley.
DRAINAGE AREA - 349 mi".
PERIOD OF RECORD - November 1909 to September 1922 (combined monthly discharge only, of Eel River at
this station and Snow Mountain Water and Power Co.'s tailrace near Potter Valley), October 1922 to
current year. Monthly discharge only for some periods, published in WSP 1315-B. Prior to October 1929,
published as South Eel River at Van Arsdale Dam, near Potter Valley.
REVISED RECORDS - WSP 1315-B: 1913, 1920.23, 1925.27. WSP 1395: 1923(M), 1938.
GAGE - Water-stage recorder. Elevation of gage is 1,400 ft above sea level, from topographic map. Nov.
18, 1909, to Mar. 3, 1927, recorder in reservoir 800 ft upstream from Van Arsdale Dam at different
datum. Oct. 1, 1927, to Feb. 28, 1937, nonrecording gage at present site and datum.
REMARKS - Flow regulated by Lake Pillsbury (station 11470000) 11 mi upstream. Low flows may be further
regulated at Van Arsdale Dam by calibrated gates in dam and fish ladder. Water is diverted from Van
Arsdale Reservoir through tunnel to Potter Valley Powerhouse Intake (station 11471000), after which
part is used for irrigation and remainder flows into East Fork Russian River (see station 11471099).
Records given represent flow only in the Eel River. See schematic diagram of Eel River Basin.
COOPERATION - Records collected by Pacific Gas and Electric Co., under general supervision of the U.S.
Geological Survey, in connection with a Federal Energy Regulatory Commission project.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 64,100 ft³/s, Dec. 22, 1964, gage height, 33.9 ft,
from floodmarks; no flow at times.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 5.8 41 103 111 1550 3090 92 120 113 38 9.8 11
2 5.7 54 104 111 1890 2420 93 121 114 28 9.8 11
3 7.8 61 103 101 1480 1980 92 122 112 17 9.8 10
4 10 55 103 112 1280 1730 93 124 100 14 9.7 10
5 13 40 103 115 1610 2340 96 125 97 10 9.8 9.8
6 17 33 103 109 2340 2210 97 126 84 9.4 9.8 9.8
7 16 32 103 107 1780 1830 97 127 83 9.3 9.6 9.5
8 18 32 103 110 1260 1660 102 129 77 9.5 8.7 9.4
9 22 32 103 112 981 1620 97 127 76 9.7 8.7 9.2
10 23 35 103 110 950 1600 99 129 69 9.7 8.7 9.1
11 24 42 103 284 1270 1660 96 135 63 9.7 8.7 9.0
12 26 49 103 105 2290 1560 97 150 63 9.8 8.8 8.8
13 29 97 103 105 4760 1370 99 144 52 9.8 8.9 8.7
14 29 101 103 121 9410 1230 101 145 51 9.7 8.9 9.2
15 29 101 103 171 5250 1130 103 152 34 9.7 9.0 9.3
16 35 101 102 399 3210 1030 105 161 34 9.5 9.1 9.2
17 35 101 102 142 2350 968 111 166 33 8.9 9.1 9.0
18 35 101 103 304 1730 864 101 151 32 8.9 9.4 8.9
19 35 101 103 327 1220 836 117 150 37 9.0 9.0 8.7
20 35 101 100 353 1130 962 114 143 36 8.8 9.7 8.6
21 35 101 99 175 1730 891 125 145 36 8.8 10 8.6
22 35 101 99 134 2070 646 123 139 36 9.0 11 8.4
23 36 101 99 106 2550 593 146 136 36 9.0 10 8.3
24 43 103 99 122 2330 555 131 144 36 9.2 9.8 8.2
25 75 103 99 354 1670 411 193 137 36 9.1 9.7 8.1
26 59 103 99 937 2550 149 171 138 36 9.0 9.7 8.0
27 67 103 99 920 6960 105 153 137 37 9.5 9.3 7.9
28 72 103 99 698 5060 94 138 136 37 9.4 9.1 8.3
29 98 103 99 411 3940 100 123 135 38 9.4 9.7 8.0
30 68 104 99 724 --- 91 120 134 38 9.2 11 8.1
31 53 --- 99 1010 --- 92 --- 136 --- 9.2 11 ---
TOTAL 1091.3 2335 3145 9000 76601 35817 3425 4264 1726 349.2 295.3 270.1
MEAN 35.2 77.8 101 290 2641 1155 114 138 57.5 11.3 9.53 9.00
MAX 98 104 104 1010 9410 3090 193 166 114 38 11 11
MIN 5.7 32 99 101 950 91 92 120 32 8.8 8.7 7.9
AC-FT 2160 4630 6240 17850 151900 71040 6790 8460 3420 693 586 536
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1923 - 2000, BY WATER YEAR (WY)
MEAN 12.1 127 705 1402 1557 1062 555 180 28.9 5.68 5.68 5.44
MAX 153 2389 5249 6293 8904 5492 3863 1174 366 25.3 54.1 27.9
(WY) 1963 1974 1965 1970 1986 1983 1982 1983 1998 1999 1980 1959
MIN .86 1.30 1.78 2.00 3.62 2.00 2.00 2.00 1.07 1.06 1.09 1.10
(WY) 1953 1953 1937 1924 1977 1924 1924 1924 1931 1931 1931 1931
SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1923 - 2000
ANNUAL TOTAL 216750.1 138318.9
ANNUAL MEAN 594 378 461
HIGHEST ANNUAL MEAN 1546 1983
LOWEST ANNUAL MEAN 3.46 1977
HIGHEST DAILY MEAN 10600 Feb 9 9410 Feb 14 49500 Dec 22 1964
LOWEST DAILY MEAN 5.3 Sep 19 5.7 Oct 2 .00 Sep 13 1953
ANNUAL SEVEN-DAY MINIMUM 5.5 Jul 14 8.1 Sep 24 .16 Dec 5 1965
INSTANTANEOUS PEAK FLOW 10800 Feb 14 64100 Dec 22 1964
INSTANTANEOUS PEAK STAGE 18.20 Feb 14 33.90 Dec 22 1964
ANNUAL RUNOFF (AC-FT) 429900 274400 334200
10 PERCENT EXCEEDS 1700 1270 1100
50 PERCENT EXCEEDS 101 99 9.5
90 PERCENT EXCEEDS 5.6 9.0 2.0
[an error occurred while processing this directive]