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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 57.9 1983 1.52 1941 10.3 8.38 0.81 2.19
November 23.7 1983 2.03 1941 9.02 4.36 0.48 1.91
December 19.2 1983 2.06 1941 7.47 3.57 0.48 1.59
January 16.3 1986 2.70 1941 6.53 2.84 0.43 1.39
February 29.9 1981 1.21 1963 7.43 4.50 0.61 1.58
March 323 1995 4.07 1941 64.3 73.3 1.14 13.7
April 1,180 1950 9.46 1991 211 247 1.17 44.8
May 1,040 1950 7.07 1961 70.3 157 2.23 14.9
June 255 1964 2.74 1940 34.4 44.6 1.30 7.29
July 232 1982 3.34 m 28.0 45.8 1.64 5.94
August 280 1993 1.64 1945 13.2 36.8 2.79 2.81
September 53.3 1993 0.913 1940 8.92 7.54 0.84 1.89
Annual 193 1950 6.37 1990 39.7 33.4 0.84 100
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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 2.70 2.00 3.70 8.06 6.72 4.10 2.40 1.40 2.10 2.30 3.50 3.00 2.60
90 3.00 2.70 4.76 10.6 8.23 5.60 3.00 2.20 2.90 3.20 3.90 3.30 3.64
85 3.50 3.60 5.28 13.0 10.0 6.47 3.70 2.80 2.90 3.80 4.30 3.70 4.13
80 3.80 3.60 5.89 14.7 11.3 7.57 3.70 2.80 3.40 4.50 4.70 4.20 4.88
75 4.50 4.10 6.41 17.0 12.7 8.15 4.92 3.50 4.00 4.50 5.20 4.70 5.24
70 4.50 4.70 7.00 19.9 13.7 9.67 5.60 3.50 4.00 5.63 5.80 5.20 5.59
65 4.90 4.70 7.32 23.1 14.7 11.8 6.25 4.53 4.80 6.10 6.30 5.20 6.62
60 4.90 5.40 7.64 29.3 16.0 13.1 7.18 4.97 4.80 6.62 7.00 5.80 7.16
55 5.30 5.40 8.68 35.7 17.6 14.5 7.61 5.50 5.99 7.20 7.00 5.80 7.69
50 5.80 6.30 9.22 46.5 19.3 16.0 8.04 5.85 6.41 7.90 7.70 6.50 8.23
45 6.30 6.30 10.9 61.3 21.8 17.6 10.1 6.21 6.87 8.35 8.50 6.50 9.60
40 6.80 7.28 12.2 82.3 25.2 19.7 11.7 6.97 7.34 9.32 8.50 7.30 10.8
35 6.80 7.57 14.2 106 29.5 22.1 13.1 7.33 8.01 9.82 9.30 7.30 12.2
30 7.40 7.86 18.7 140 34.4 24.9 14.9 7.70 8.48 11.4 10.7 8.63 14.2
25 7.40 8.15 31.4 188 41.6 29.3 17.8 9.18 9.45 12.3 11.7 9.20 16.2
20 8.10 8.91 56.6 250 55.7 35.1 24.0 10.3 11.1 13.3 12.7 9.20 20.6
15 8.80 10.3 104 344 81.1 44.3 36.6 13.5 13.6 15.1 13.6 11.2 29.4
10 11.1 11.9 200 523 123 59.6 55.4 17.6 17.9 17.7 14.9 12.6 52.6
5 13.0 13.0 368 894 264 109 111 29.2 24.9 25.2 18.5 13.9 145
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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 16.1 11.6 10.1 7.86 7.23
0.95 1.05 62.8 44.0 35.5 26.7 20.8
0.90 1.11 123 84.3 65.4 48.4 35.1
0.80 1.25 262 175 130 94.0 64.1
0.50 2 964 593 413 286 183
0.20 5 2,940 1,630 1,080 715 457
0.10 10 4,890 2,560 1,670 1,070 704
0.04 25 8,020 3,910 2,500 1,570 1,080
0.02 50 10,700 4,990 3,170 1,950 1,390
0.01 100 13,700 6,100 3,860 2,340 1,720
0.005 200 16,900 7,230 4,550 2,720 2,080
0.002 500 21,400 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
1940 April 17 3.60 130 1969 April 11 8.80 3,290
1941 April 8 8.03 2,250 1970 April 8 7.68 2,380
1942 April 4 9.73 3,650 1971 April 8 8.39 2,800
1943 June 9 6.72 1,620 1972 April 14 6.43 1,500
1944 April 5 5.89 400 1973 June 17 3.56 384
1945 March 27 3.15 243 1974 May 20 9.86 5,050
1946 March 20 6.14 950 1975 April 12 5.68 1,270
1947 March 23 7.40 700 1976 March 29 5.46 1,100
1948 April 18 14.15 14,600 1977 July 14 2.43 100
1949 April 7 5.64 1,470 1978 April 6 5.50 1,200
1950 April 18 14.48 16,400 1979 April 20 9.98 5,200
1951 March 29 -- 500 1980 April 2 2.55 105
1952 July 2 3.94 825 1981 April 2 2.73 180
1953 May 30 2.04 130 1982 July 25 6.49 1,760
1954 June 15 4.29 1,020 1983 March 7 5.23 995
1955 March 31 8.46 3,000 1984 March 24 3.92 386
1956 June 6 8.14 3,370 1985 March 13 5.45 625
1957 March 22 3.53 356 1986 March 17 5.79 1,380
1958 July 4 1.87 17.0 1987 April 5 6.00 1,410
1959 April 4 2.91 321 1988 March 24 3.23 229
1960 April 7 7.55 2,810 1989 April 16 2.79 158
1961 March 19 2.69 65.0 1990 June 3 1.67 17.0
1962 April 6 7.69 2,600 1991 September 18 -- 77.0
1963 July 8 3.67 590 1992 March 7 -- 530
1964 June 19 9.03 3,960 1993 July 26 5.72 1,090
1965 April 11 10.22 4,730 1994 March 21 4.66 721
1966 March 21 7.14 1,580 1995 March 19 -- 1,500
1967 March 30 7.40 2,030 1996 May 17 7.30 2,900
1968 March 8 4.48 500 1997 April 4 6.84 2,050
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 April 18 14.48 16,400 1970 April 8 7.68 2,380
1948 April 18 14.15 14,600 1941 April 8 8.03 2,250
1979 April 20 9.98 5,200 1997 April 4 6.84 2,050
1974 May 20 9.86 5,050 1967 March 30 7.40 2,030
1965 April 11 10.22 4,730 1982 July 25 6.49 1,760
1964 June 19 9.03 3,960 1943 June 9 6.72 1,620
1942 April 4 9.73 3,650 1966 March 21 7.14 1,580
1956 June 6 8.14 3,370 1972 April 14 6.43 1,500
1969 April 11 8.80 3,290 1995 March 19 -- 1,500
1955 March 31 8.46 3,000 1949 April 7 5.64 1,470
1996 May 17 7.30 2,900 1987 April 5 6.00 1,410
1960 April 7 7.55 2,810 1986 March 17 5.79 1,380
1971 April 8 8.39 2,800 1975 April 12 5.68 1,270
1962 April 6 7.69 2,600 1978 April 6 5.50 1,200
1976 March 29 5.46 1,100 1973 June 17 3.56 384
1993 July 26 5.72 1,090 1957 March 22 3.53 356
1973 June 17 3.56 384 1959 April 4 2.91 321
1983 March 7 5.23 995 1945 March 27 3.15 243
1946 March 20 6.14 950 1988 March 24 3.23 229
1952 July 2 3.94 825 1981 April 2 2.73 180
1994 March 21 4.66 721 1989 April 16 2.79 158
1947 March 23 7.40 700 1940 April 17 3.60 130
1985 March 13 5.45 625 1953 May 30 2.04 130
1963 July 8 3.67 590 1980 April 2 2.55 105
1992 March 7 -- 530 1977 July 14 2.43 100
1951 March 29 -- 500 1991 September 18 -- 77.0
1968 March 8 4.48 500 1961 March 19 2.69 65.0
1944 April 5 5.89 400 1958 July 4 1.87 17.0
1984 March 24 3.92 386 1990 June 3 1.67 17.0
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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
__________________________________________________________________________________________________________________________________
1940 -- -- -- -- -- -- 21.6 7.28 2.74 8.08 6.97 0.913 --
1941 1.52 2.03 2.06 2.70 2.91 4.07 462.8 9.71 22.6 3.34 2.55 12.0 43.5
1942 24.9 8.92 4.92 3.13 3.60 156.7 368.3 25.9 9.56 6.65 11.9 3.65 52.3
1943 2.70 2.91 3.05 3.26 3.78 133.7 41.0 14.1 154.2 144.9 10.4 5.33 43.5
1944 4.46 4.89 4.86 3.94 2.81 5.69 83.0 13.5 17.2 5.27 4.41 4.78 12.8
1945 2.83 8.53 6.50 3.71 4.92 82.6 20.3 11.5 8.79 3.91 1.64 2.82 13.3
1946 2.96 3.71 3.80 4.59 4.22 121.7 20.0 7.21 7.02 3.97 2.30 4.30 15.6
1947 4.59 4.25 4.24 3.21 2.17 65.5 41.6 9.00 7.45 5.89 3.41 3.52 13.0
1948 4.87 4.65 5.62 5.00 5.00 5.21 869.0 45.7 21.3 8.91 8.45 3.94 81.2
1949 4.30 5.17 3.79 3.00 3.00 4.81 334.0 17.8 7.61 11.0 5.13 3.58 33.3
1950 8.48 7.39 6.51 4.61 5.64 11.6 1,182 1,037 23.2 11.3 6.83 8.78 193.1
1951 8.29 8.67 8.35 7.77 7.29 57.0 104.0 13.8 10.5 5.23 6.74 5.80 20.3
1952 6.52 8.37 5.74 6.32 7.62 19.2 61.0 9.23 6.13 30.5 4.28 4.45 14.1
1953 4.67 5.74 5.17 4.92 6.00 7.59 9.59 17.4 17.8 6.26 3.67 4.49 7.77
1954 5.76 6.18 4.37 3.46 8.18 27.5 26.8 12.0 46.0 5.87 11.4 7.33 13.7
1955 5.78 6.75 6.48 4.93 5.11 92.8 166.1 14.7 64.1 5.59 3.88 3.98 31.6
1956 6.03 5.04 3.16 4.97 5.34 6.32 393.3 59.2 144.5 22.5 6.49 11.0 55.0
1957 11.4 12.5 7.13 5.29 6.43 50.3 14.0 14.5 11.9 5.91 6.48 13.5 13.3
1958 10.3 9.42 7.70 7.26 7.03 9.12 10.2 10.2 9.92 8.33 3.82 3.68 8.08
1959 6.31 5.72 4.79 4.40 5.37 20.5 66.9 14.4 7.29 3.76 2.40 3.39 12.1
1960 6.02 5.51 5.46 5.33 4.77 34.5 447.4 17.7 8.24 5.99 4.82 4.40 45.3
1961 3.92 6.59 6.15 4.01 3.64 24.1 12.3 7.07 4.26 3.81 2.69 3.51 6.87
1962 5.53 5.09 3.85 4.61 6.01 9.20 258.4 30.1 117.1 11.5 9.61 9.55 38.8
1963 11.0 11.3 8.03 4.01 1.21 21.8 14.9 12.6 27.8 29.2 4.74 3.38 12.6
1964 4.81 6.83 5.18 5.57 7.15 6.99 91.9 14.7 254.9 24.0 9.86 9.95 36.4
1965 9.83 8.42 5.88 6.05 7.57 8.87 369.6 39.3 41.5 15.7 8.52 21.4 44.8
1966 22.5 11.2 10.2 7.07 8.42 278.4 200.7 172.7 48.9 34.2 12.8 10.2 68.6
1967 11.9 13.5 17.8 12.8 10.9 132.3 184.4 180.3 24.1 11.0 6.27 6.38 51.2
1968 9.90 8.95 8.41 8.17 10.5 78.6 20.1 16.1 12.5 17.3 8.68 7.97 17.3
1969 8.91 9.86 7.07 6.86 8.31 10.0 434.1 40.9 22.6 10.5 5.72 6.67 47.2
1970 8.04 9.85 10.8 7.57 8.41 7.90 276.8 65.3 20.1 15.8 7.30 7.62 36.9
1971 14.2 11.6 8.76 7.25 9.02 16.1 460.0 38.3 21.7 71.5 14.4 10.7 56.6
1972 14.2 17.6 11.1 7.20 6.93 204.4 214.3 47.4 17.4 7.84 6.58 7.26 46.9
1973 7.97 8.89 5.57 9.15 10.0 46.2 14.4 15.7 25.0 4.93 4.24 6.01 13.2
1974 11.6 9.99 9.18 8.00 7.50 8.02 489.5 453.7 118.3 20.9 14.4 9.03 96.8
1975 12.4 13.7 10.6 8.11 7.58 16.4 250.7 69.0 16.8 70.8 6.12 6.61 40.7
1976 8.02 9.25 9.47 9.12 8.47 143.5 187.3 22.3 13.1 7.23 5.36 5.60 35.7
1977 4.04 4.62 7.36 8.04 6.11 14.3 14.0 14.2 6.66 9.17 3.22 11.5 8.62
1978 13.5 7.95 6.04 2.99 2.40 76.2 349.3 43.6 53.3 20.2 8.83 6.22 49.0
1979 7.91 6.68 5.49 5.85 7.28 9.61 776.9 321.3 32.5 22.4 7.88 21.5 101.7
1980 9.04 5.46 3.57 7.12 7.58 15.4 43.9 9.34 4.48 3.34 6.25 9.15 10.3
1981 9.84 13.5 6.21 4.98 29.9 37.5 33.5 15.9 14.8 9.85 9.78 16.2 16.7
1982 14.5 9.92 8.01 3.94 3.72 79.9 198.7 37.5 60.8 232.2 52.6 7.56 59.5
1983 57.9 23.7 19.2 10.1 18.5 168.2 143.4 31.1 20.4 20.6 11.8 18.5 45.4
1984 10.6 9.86 4.69 7.32 16.4 63.2 58.5 24.6 19.2 9.00 5.22 8.62 19.7
1985 6.25 6.27 5.99 6.59 4.47 119.0 38.0 24.6 20.1 4.85 5.70 12.9 21.4
1986 19.9 21.9 18.4 16.3 9.03 197.1 58.9 43.0 23.5 70.5 15.4 12.6 42.6
1987 16.0 11.2 8.79 9.61 12.1 114.5 489.4 50.8 24.0 31.5 9.44 10.7 65.4
1988 9.74 9.50 8.91 7.48 11.9 41.3 43.0 21.6 15.3 3.58 1.99 10.8 15.4
1989 17.9 5.77 6.72 6.99 4.64 5.78 56.7 27.0 12.7 7.72 4.30 5.54 13.5
1990 8.88 8.23 6.80 4.90 4.44 4.90 12.6 8.79 7.87 4.72 1.82 2.50 6.37
1991 3.15 4.11 4.90 4.28 5.55 7.29 9.46 10.9 6.74 18.5 3.93 14.1 7.74
1992 9.45 13.3 8.53 6.99 10.5 156.3 42.6 16.1 8.30 8.55 4.74 4.99 24.3
1993 4.89 7.10 7.46 6.29 4.91 17.4 65.2 18.4 28.0 176.7 279.9 53.3 56.4
1994 20.9 13.4 12.1 7.83 8.44 164.4 120.6 42.7 74.7 47.8 11.5 10.4 44.8
1995 23.0 18.2 11.7 11.5 11.3 323.0 255.3 106.1 52.5 72.7 14.6 8.87 76.2
1996 11.1 12.4 11.9 12.9 10.9 110.9 484.2 335.4 76.7 17.5 7.64 5.54 91.3
1997 11.0 12.0 11.3 12.9 10.6 12.1 725.9 269.5 35.7 161.0 54.6 18.2 111.1
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