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Statistics of monthly and annual mean discharges
[m, more than 1 year of occurrence]
__________________________________________________________________________________________________________
Maximum Minimum Mean
______________________ ______________________ _____________________________________________
Water year Water year Standard Coeffi- Percentage
Month Discharge of Discharge of Discharge deviation cient of of annual
(ft3/s) occurrence (ft3/s) occurrence (ft3/s) (ft3/s) variation discharge
__________________________________________________________________________________________________________
October 436 1995 0 m 16.0 55.4 3.47 1.61
November 188 1995 0 m 11.7 25.7 2.20 1.18
December 79.9 1995 0 m 7.59 12.8 1.69 0.77
January 31.8 1995 0 m 4.55 7.57 1.66 0.46
February 20.0 1932 0 m 8.15 34.1 4.18 0.82
March 1,220 1995 0 1940 153 250 1.64 15.4
April 3,410 1997 6.51 1938 504 699 1.39 50.8
May 2,280 1950 1.12 1939 122 292 2.40 12.3
June 385 1968 1.35 1938 63.0 73.5 1.17 6.36
July 729 1993 0 1940 61.1 133 2.18 6.16
August 515 1993 0 m 23.9 71.8 3.01 2.41
September 326 1994 0 m 17.0 49.0 2.88 1.71
Annual 395 1950 3.47 1937 84.6 93.4 1.10 100
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Monthly and annual flow duration, in cubic feet per second
______________________________________________________________________________________________________________________
Percentage
of days
discharge Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. Annual
equaled or
exceeded
______________________________________________________________________________________________________________________
95 0 0 0 5.89 2.30 0.97 0.06 0 0 0 0 0 0
90 0 0 0.19 10.1 4.76 1.70 0.27 0 0 0 0 0 0.08
85 0.10 0.10 0.49 17.0 6.56 3.79 0.56 0.09 0.08 0.09 0.17 0.19 0.30
80 0.17 0.18 0.67 23.8 8.02 4.97 1.20 0.29 0.16 0.16 0.31 0.19 0.45
75 0.28 0.27 0.92 29.6 12.0 7.36 1.70 0.60 0.23 0.30 0.42 0.37 0.70
70 0.36 0.40 1.30 35.7 14.4 9.60 2.98 0.87 0.33 0.40 0.57 0.58 1.10
65 0.47 0.59 2.40 47.3 17.3 12.0 4.01 0.87 0.47 0.53 1.10 0.90 1.60
60 0.60 0.72 3.60 60.4 21.2 15.0 5.79 1.30 0.66 0.53 1.50 1.40 2.93
55 0.78 1.30 4.60 75.3 25.6 17.8 7.72 1.80 0.94 0.72 2.00 1.70 4.34
50 1.30 1.90 5.27 97.9 30.3 21.6 10.1 1.80 1.30 0.97 3.78 2.70 5.59
45 2.20 2.30 7.73 132 37.3 28.4 12.9 3.07 1.90 1.80 4.46 3.40 7.47
40 2.80 2.90 12.1 180 46.0 38.4 15.3 4.12 1.90 2.30 5.52 3.40 10.2
35 3.72 3.50 19.4 243 56.7 49.6 20.3 5.93 2.97 4.05 7.07 4.84 14.0
30 4.46 4.77 33.5 321 76.8 60.4 28.0 7.26 4.22 5.76 8.43 6.15 19.0
25 5.14 5.45 64.7 444 102 72.2 38.2 9.95 6.78 8.27 11.5 7.16 27.2
20 5.69 6.04 109 652 137 88.4 50.6 14.5 11.8 12.8 15.2 10.2 42.3
15 8.26 7.16 189 958 189 113 70.0 21.9 19.9 20.1 19.1 14.1 69.4
10 10.9 12.0 390 1,410 279 155 108 51.7 35.7 30.3 25.6 17.8 132
5 16.1 17.0 968 2,520 466 240 245 119 69.5 55.5 39.8 24.5 340
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Probability of annual high discharges
[ng, statistic not given]
__________________________________________________________________________________________________
Maximum average discharge
(ft3/s)
___________________________________________________________
Recurrence Maximum
Exceedance interval instantaneous 3-day period 7-day period 15-day period 30-day period
probability (years) (ft3/s)
__________________________________________________________________________________________________
0.99 1.01 21.6 17.5 15.7 11.8 9.21
0.95 1.05 81.6 73.1 62.0 44.8 31.2
0.90 1.11 156 145 121 85.8 57.2
0.80 1.25 328 313 255 178 114
0.50 2 1,160 1,110 894 614 382
0.20 5 3,400 3,100 2,510 1,730 1,090
0.10 10 5,560 4,850 3,980 2,740 1,780
0.04 25 8,930 7,330 6,130 4,260 2,890
0.02 50 11,800 9,270 7,860 5,510 3,860
0.01 100 14,900 11,200 9,650 6,820 4,930
0.005 200 18,200 13,100 11,500 8,160 6,100
0.002 500 22,900 ng ng ng ng
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Annual peak discharge and corresponding gage height, period of record
[--, no data]
_____________________________________________________________________________________
Gage Peak Gage Peak
Water Date height discharge Water Date height discharge
year (feet) (ft3/s) year (feet) (ft3/s)
_____________________________________________________________________________________
Annual peak discharge, by year, and corresponding gage height
11882 April2 -- 6,700 1963 April 8 1.24 290
11897 April2 -- 5,700 1964 June 14 3.61 1,110
11904 April2 -- 5,300 1965 April 13 14.01 6,800
11916 April2 -- 4,700 1966 March 23 12.17 3,290
1931 April 7 4.20 100 1967 April 24 7.81 2,650
1932 March 3 15.14 959 1968 June 12 4.48 1,420
1933 March2 10.40 300 1969 April 12 14.19 7,640
1934 April 2 4.95 107 1970 April 9 9.18 3,040
1935 June 14 8.45 697 1971 April 10 4.41 1,550
1936 April 16 13.06 1,660 1972 April 15 6.62 2,380
1937 April 15 3.57 46.0 1973 March 15 4.05 1,280
1938 March 15 4.44 104 1974 April 15 9.43 3,450
1939 March 26 11.00 564 1975 April 19 11.11 3,810
1940 April 17 1.66 710 1976 March 29 3.98 1,260
1941 April 11 2.26 1,320 1977 April 11 2.01 86.0
1942 April 6 2.27 1,140 1978 April 1 10.56 3,800
1943 March 29 8.84 3,480 1979 April 21 16.76 14,800
1944 April 10 1.11 304 1980 March 31 3.55 790
1945 March 17 1.09 293 1981 June 25 1.83 25.6
1946 March 22 3.22 1,300 1982 April 3 8.89 2,900
1947 April 13 5.30 1,700 1983 March 17 -- 1,140
1948 April 16 10.63 4,180 1984 March 29 7.99 2,660
1949 April 8 3.38 1,640 1985 March 16 4.17 1,240
1950 April 19 14.94 9,420 1986 March 24 4.81 1,630
1951 March 31 3.48 1,130 1987 March 26 10.22 3,570
1952 April 4 3.33 1,300 1988 March 28 3.86 1,060
1953 July 6 1.36 408 1989 April 8 9.80 3,000
1954 June 15 0.99 231 1990 April 6 2.01 94.0
1955 April 3 2.44 1,220 1991 June 1 2.75 351
1956 April 19 2.58 1,390 1992 March 8 3.69 975
1957 September 7 1.17 200 1993 July 30 12.90 4,360
1958 July 3 0.69 88.0 1994 March 23 6.91 2,160
1959 April 5 0.84 143 1995 March 18 9.00 3,390
1960 April 9 3.37 1,360 1996 April 13 12.06 4,750
1961 March 7 0.66 82.0 1997 April 6 15.62 8,520
1962 April 9 8.64 2,350
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 21 16.76 14,800 11904 April2 -- 5,300
1950 April 19 14.94 9,420 1996 April 13 12.06 4,750
1997 April 6 15.62 8,520 11916 April2 -- 4,700
1969 April 12 14.19 7,640 1993 July 30 12.90 4,360
1965 April 13 14.01 6,800 1948 April 16 10.63 4,180
11882 April2 -- 6,700 1975 April 19 11.11 3,810
11897 April2 -- 5,700 1978 April 1 10.56 3,800
1987 March 26 10.22 3,570 1983 March 17 -- 1,140
1943 March 29 8.84 3,480 1951 March 31 3.48 1,130
1974 April 15 9.43 3,450 1964 June 14 3.61 1,110
1995 March 18 9.00 3,390 1988 March 28 3.86 1,060
1966 March 23 12.17 3,290 1992 March 8 3.69 975
1970 April 9 9.18 3,040 1932 March 3 15.14 959
1989 April 8 9.80 3,000 1980 March 31 3.55 790
1982 April 3 8.89 2,900 1940 April 17 1.66 710
1984 March 29 7.99 2,660 1935 June 14 8.45 697
1967 April 24 7.81 2,650 1939 March 26 11.00 564
1972 April 15 6.62 2,380 1953 July 6 1.36 408
1962 April 9 8.64 2,350 1991 June 1 2.75 351
1994 March 23 6.91 2,160 1944 April 10 1.11 304
1947 April 13 5.30 1,700 1933 March2 10.40 300
1936 April 16 13.06 1,660 1945 March 17 1.09 293
1949 April 8 3.38 1,640 1963 April 8 1.24 290
1986 March 24 4.81 1,630 1954 June 15 0.99 231
1971 April 10 4.41 1,550 1957 September 7 1.17 200
1968 June 12 4.48 1,420 1959 April 5 0.84 143
1956 April 19 2.58 1,390 1934 April 2 4.95 107
1960 April 9 3.37 1,360 1938 March 15 4.44 104
1941 April 11 2.26 1,320 1931 April 7 4.20 100
1946 March 22 3.22 1,300 1990 April 6 2.01 94.0
1952 April 4 3.33 1,300 1958 July 3 0.69 88.0
1973 March 15 4.05 1,280 1977 April 11 2.01 86.0
1976 March 29 3.98 1,260 1961 March 7 0.66 82.0
1985 March 16 4.17 1,240 1937 April 15 3.57 46.0
1955 April 3 2.44 1,220 1981 June 25 1.83 25.6
1942 April 6 2.27 1,140
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1Determined by U.S. Army Corps of Engineers; not used in
statistics.
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Monthly and annual mean discharges, in cubic feet per second
[Data were not rounded in accordance with U.S. Geological Survey publication standards; --, no data]
__________________________________________________________________________________________________________________________________
Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
__________________________________________________________________________________________________________________________________
1931 -- -- -- -- -- -- 26.8 3.56 4.24 1.27 1.33 0.330 --
1932 0.300 0.200 0.200 0.200 20.0 272.2 238.6 27.4 12.6 0.984 0.294 0.390 47.8
1933 0.526 -- -- -- -- -- 105.7 16.5 6.01 -- -- -- --
1934 -- -- -- -- -- -- 33.1 2.05 2.75 1.24 1.45 2.77 --
1935 0.700 0.200 0.200 0.200 0.300 70.0 32.0 19.9 86.0 12.0 1.00 0.400 18.6
1936 0.300 0.400 0.200 0.200 0.200 1.00 190.4 14.1 2.77 0.577 0.100 0.100 17.3
1937 0.100 0.100 0.100 0.100 0.200 0.500 15.4 7.49 9.65 2.43 3.73 2.00 3.47
1938 0.100 0.100 0.100 0.100 0.100 35.1 6.51 5.35 1.35 0.013 0 0 4.12
1939 0 0 0 0 0 99.0 37.5 1.12 9.02 0.119 0 0 12.3
1940 0 0 0 0 0 0 156.3 9.05 1.63 0 4.69 0.013 14.1
1941 0 0 0 0 0 24.5 517.2 14.0 61.4 6.93 1.26 2.53 51.7
1942 6.06 5.24 2.33 0.074 0 9.25 256.9 81.1 31.4 6.05 3.55 2.72 33.6
1943 0.916 0.820 0.742 0.445 0.321 215.0 122.0 33.3 91.4 21.5 2.12 0.457 40.9
1944 0.232 0.407 0.297 0.174 0.121 2.02 65.5 16.6 21.2 5.72 39.0 12.7 13.6
1945 2.87 13.5 5.60 0.661 0.643 98.5 40.5 18.2 17.1 5.98 1.30 1.09 17.3
1946 1.66 0.527 0.510 0.471 0.557 209.8 51.6 16.0 9.11 8.85 0.542 0.837 25.3
1947 1.36 1.46 0.671 0.216 0.139 121.5 394.7 38.3 52.0 9.17 1.94 0.887 51.6
1948 0.768 2.19 1.46 0.452 0.100 0.532 1,840 148.0 23.2 15.6 9.90 0.950 168.0
1949 0.445 3.78 1.61 0.458 0.257 1.14 516.2 37.9 158.9 18.6 12.5 1.11 62.1
1950 3.23 6.61 4.96 2.69 2.37 45.1 2,168 2,275 135.0 57.9 12.0 7.18 394.5
1951 6.08 7.88 7.35 6.27 5.81 92.1 289.3 27.4 14.4 3.61 1.58 4.29 38.7
1952 2.64 4.43 1.86 0 1.84 14.2 328.0 11.2 1.43 131.4 9.13 1.41 42.1
1953 1.08 2.05 2.73 1.88 1.92 28.4 21.8 28.6 135.7 101.6 2.17 2.86 27.6
1954 0.765 2.45 2.96 2.55 16.1 57.8 61.2 19.3 41.2 4.69 0.697 0.350 17.4
1955 0.200 0.260 0.297 0.568 0.700 0.981 214.6 6.35 61.7 5.66 2.58 0.163 24.2
1956 0.200 0.483 0.635 0.581 0.500 0.706 281.7 55.4 57.3 6.05 0.994 0.967 33.4
1957 0.384 1.82 1.43 0.994 0.739 18.3 17.8 7.88 10.5 5.30 0.106 53.0 9.81
1958 16.5 14.8 4.20 0.961 0.814 1.57 15.8 4.87 3.15 29.0 3.52 0.460 8.03
1959 0.319 0.050 0 0 0 33.6 37.2 6.70 6.81 0.484 1.33 0.293 7.24
1960 0.339 0.667 0.910 0.877 0.803 71.8 435.5 15.0 12.7 10.2 4.13 1.61 45.7
1961 0.258 1.05 0.984 0.768 0.818 54.4 26.9 19.6 3.47 0.158 0.081 0.403 9.15
1962 2.45 0.690 0.606 0.568 0.521 0.848 690.0 179.0 146.1 48.0 11.0 122.8 99.5
1963 16.5 14.4 9.10 2.32 0.296 29.3 89.0 18.4 10.5 11.8 2.08 0.350 17.0
1964 0.858 0.557 0.116 0 0 1.52 149.8 18.5 275.6 29.7 5.31 8.27 40.3
1965 26.6 7.42 3.72 3.00 1.84 1.38 1,632 171.5 69.8 67.9 23.4 36.2 168.9
1966 50.2 27.5 17.5 10.8 6.86 1,106 473.3 164.5 88.1 118.3 132.2 18.6 186.3
1967 9.56 10.5 4.47 4.76 3.90 282.9 946.0 403.1 97.7 17.1 2.18 1.04 148.5
1968 1.96 3.74 3.37 4.22 2.38 119.3 52.2 34.9 385.2 53.5 19.2 12.8 57.4
1969 7.52 11.8 7.88 3.97 3.56 5.79 1,585 133.3 80.1 73.6 14.9 31.8 161.7
1970 27.5 15.5 14.5 10.3 10.9 13.3 1,186 316.3 265.2 38.6 8.58 8.89 158.6
1971 3.56 13.4 7.54 3.57 4.96 78.9 489.7 65.5 69.4 62.0 6.63 4.07 67.1
1972 30.2 46.5 16.1 7.39 4.93 421.6 764.4 235.8 97.0 11.3 6.79 2.71 136.8
1973 1.09 6.75 3.96 3.67 5.97 275.4 50.5 18.5 12.2 3.62 1.78 4.41 32.7
1974 9.89 8.66 4.77 1.33 3.06 2.44 1,068 284.7 183.9 37.8 40.9 6.06 136.8
1975 1.63 5.89 7.45 6.91 6.18 26.7 919.9 243.0 89.4 58.6 2.84 2.22 113.6
1976 1.00 4.69 3.58 3.86 5.05 235.3 230.1 23.0 6.47 1.14 0.061 0 42.9
1977 0 0 0.232 0.300 0.296 2.26 17.6 9.72 5.06 4.18 0.145 1.96 3.48
1978 4.25 12.7 6.63 4.06 2.06 302.9 961.8 78.4 34.7 9.93 1.32 5.44 118.2
1979 1.04 1.02 1.62 1.70 2.05 3.14 2,878 421.1 71.7 44.3 15.1 3.22 284.4
1980 4.32 6.74 8.45 5.02 4.73 55.3 215.4 9.76 2.65 0.437 1.48 2.25 26.2
1981 0.782 2.43 2.40 2.16 4.85 9.88 6.61 7.48 14.4 7.64 8.15 2.76 5.79
1982 4.89 7.84 11.0 5.23 4.19 80.6 816.7 64.3 19.1 18.8 1.60 0.415 85.5
1983 62.9 20.7 22.0 8.96 8.00 418.6 230.9 57.1 129.6 62.7 29.0 44.3 91.8
1984 26.5 25.7 15.3 8.42 7.06 403.2 402.0 83.0 114.5 4.14 0.058 0 90.8
1985 5.90 4.50 0.672 0.828 2.40 344.5 75.6 40.7 13.7 0.581 19.0 0.814 43.0
1986 4.06 5.17 5.55 6.08 5.31 391.3 265.5 217.9 41.8 46.7 7.45 4.94 84.2
1987 14.4 15.1 18.0 12.7 6.81 922.9 1,043 147.8 102.5 532.5 160.1 50.0 253.6
1988 15.4 25.0 22.5 12.4 13.9 349.1 248.7 37.5 13.5 4.52 0.780 0.537 62.1
1989 0.735 2.50 3.76 4.58 4.16 6.46 789.4 51.7 20.8 3.15 1.32 1.44 73.3
1990 0.568 0.492 0.190 0.842 1.21 2.57 23.7 10.5 8.65 13.9 4.24 0 5.58
1991 0 0.006 0 0.275 2.94 7.20 23.6 80.2 47.8 8.91 0.547 0 14.3
1992 0.021 2.01 1.57 0.374 0.210 274.9 29.4 12.3 10.7 108.0 13.8 18.2 39.8
1993 6.43 16.5 9.15 3.95 5.31 157.8 223.4 42.7 48.4 729.1 515.0 200.0 164.9
1994 55.0 36.2 31.1 23.2 16.9 555.4 250.9 164.6 142.0 426.2 221.9 326.1 188.8
1995 436.4 188.0 79.9 31.8 17.4 1,220 994.3 516.1 105.4 307.4 86.8 65.5 340.0
1996 92.8 59.1 22.5 19.5 12.0 76.6 1,988 473.0 133.9 88.8 16.0 8.68 247.2
1997 25.5 21.3 14.1 12.5 16.3 34.2 3,412 375.9 144.6 464.6 73.2 23.4 382.1
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