10296500 WEST WALKER RIVER NEAR COLEVILLE, CA
LOCATION.--Lat 38°30'55", long 119°27'15", in NW 1/4 NE 1/4 sec.28, T.8 N., R.23 E., Mono County, Hydrologic Unit
16050302, in Toiyabe National Forest, on left bank, 0.2 mi downstream from Rock Creek, and 5 mi southeast of
Coleville.
DRAINAGE AREA.--250 mi2.
PERIOD OF RECORD.--October 1902 to July 1908 (published as West Fork of Walker River near Coleville, 1903, 1905-8
and as Walker River (West Fork) near Coleville, 1904), March 1909 to September 1910, June 1915 to March 1938,
May 1957 to current year. Monthly discharge only for some periods published in WSP 1314.
REVISED RECORDS.--WSP 880: 1917 (runoff in acre-ft). WSP 1514: 1918, 1923. WDR NV-80-1: Drainage area.
GAGE.--Water-stage recorder. Elevation of gage is 5,520 ft above sea level, from topographic map. Prior to
July 31, 1908, nonrecording gage at site 0.5 mi upstream at different datum. March 1, 1909, to August 31,
1910, nonrecording gage, and June 18, 1915, to August 15, 1919, water-stage recorder near present site at
different datums. August 16, 1919, to March 31, 1938, water-stage recorder at site 1,000 ft upstream at
different datum. May 26, 1957, to September 10, 1963, water-stage recorder at site 10 ft downstream at datum
0.38 ft lower. September 10, 1963, to October 28, 1994, water-stage recorder at site 20 ft upstream at datum
2.5 ft higher.
REMARKS.--Records good except for estimated daily discharges, which are poor. Station is above diversions except
for a few small ranch ditches. Flow slightly regulated by Poore Lake, capacity, 1,200 acre-ft, 17 mi upstream.
These data are reviewed and provided by the Nevada District Office, U.S. Geological Survey.
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
1 116 73 62 94 98 144 267 1180 980 891 266 112
2 113 68 56 90 91 140 285 1210 1210 998 253 109
3 109 68 e60 91 88 147 269 1120 1490 1090 222 103
4 106 65 80 88 124 161 249 996 1670 965 203 99
5 105 74 105 84 347 110 254 977 1640 852 190 98
6 102 70 89 85 338 145 279 1030 1690 773 186 97
7 98 75 85 82 271 162 333 1040 1850 822 179 93
8 99 76 76 84 240 161 429 1080 1920 875 184 91
9 96 71 74 84 237 172 527 1000 1790 879 188 91
10 93 69 69 e85 214 183 528 1060 1650 844 186 91
11 91 72 90 e90 201 187 495 1190 1540 841 183 89
12 90 73 302 97 195 184 478 1450 1470 938 189 84
13 91 71 163 96 192 179 433 1650 1620 828 198 89
14 90 70 144 92 188 170 434 1690 1620 880 197 94
15 88 71 133 96 185 166 501 1940 1420 773 194 90
16 87 69 124 121 194 173 569 3210 1370 683 187 93
17 87 69 106 110 211 182 488 1700 1300 552 179 92
18 85 70 109 113 197 210 450 1730 1210 468 165 90
19 85 64 105 91 237 243 394 1180 1210 427 157 88
20 84 61 95 106 233 285 355 978 1210 391 148 83
21 81 60 75 107 208 319 324 920 1190 381 142 81
22 78 52 69 74 189 338 313 886 1030 383 136 78
23 80 58 84 80 195 298 341 826 1020 400 133 76
24 81 61 79 88 183 254 466 726 1030 434 136 74
25 79 65 67 78 179 240 668 637 895 391 141 75
26 81 62 81 92 175 219 862 621 742 350 136 75
27 e78 e65 69 93 165 228 1010 798 588 337 132 75
28 e76 67 72 83 163 242 962 707 525 351 127 73
29 e76 71 74 94 153 207 920 742 588 336 122 70
30 e77 68 102 103 --- 220 1090 841 746 311 119 70
31 75 --- 111 103 --- 226 --- 859 --- 284 116 ---
TOTAL 2777 2028 3010 2874 5691 6295 14973 35974 38214 19728 5294 2623
MEAN 89.6 67.6 97.1 92.7 196 203 499 1160 1274 636 171 87.4
MAX 116 76 302 121 347 338 1090 3210 1920 1090 266 112
MIN 75 52 56 74 88 110 249 621 525 284 116 70
AC-FT 5510 4020 5970 5700 11290 12490 29700 71350 75800 39130 10500 5200
e Estimated
10296500 WEST WALKER RIVER NEAR COLEVILLE, CA--Continued
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1903 - 1996, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 70.5 70.9 67.2 68.0 81.2 123 301 775 982 525 167 83.8
MAX 299 214 270 189 280 403 636 1756 2055 2492 721 269
(WY) 1905 1974 1965 1980 1963 1986 1910 1969 1983 1907 1995 1907
MIN 21.5 25.4 28.7 26.9 32.0 42.1 118 149 106 26.9 17.4 16.1
(WY) 1978 1930 1960 1930 1929 1933 1975 1977 1924 1924 1924 1924
SUMMARY STATISTICS FOR 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1903 - 1996
ANNUAL TOTAL 201897 139481
ANNUAL MEAN 553 381 276
HIGHEST ANNUAL MEAN 669 1907
LOWEST ANNUAL MEAN 74.5 1977
HIGHEST DAILY MEAN 3350 Jul 9 3210 May 16 4170 Jul 3 1907
LOWEST DAILY MEAN 46 Jan 5 52 Nov 22 14 Jul 24 1924
ANNUAL SEVEN-DAY MINIMUM 58 Jan 2 60 Nov 20 14 Aug 28 1924
INSTANTANEOUS PEAK FLOW 4040 May 16 6500 Dec 11 1937
INSTANTANEOUS PEAK STAGE 7.82 May 16 .00 Dec 11 1937
ANNUAL RUNOFF (AC-FT) 400500 276700 199800
10 PERCENT EXCEEDS 1640 1050 836
50 PERCENT EXCEEDS 201 171 97
90 PERCENT EXCEEDS 71 73 37
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