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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 34.5 1995 0.432 1991 3.25 5.49 1.69 2.71
November 39.0 1995 0.265 1977 3.10 5.91 1.91 2.59
December 21.2 1995 0.034 1996 1.43 3.30 2.30 1.20
January 4.10 1983 0 m 0.59 1.03 1.74 0.49
February 26.8 1983 0 m 2.51 5.38 2.14 2.10
March 146 1995 0 1969 29.3 35.0 1.19 24.5
April 324 1997 2.13 1991 40.6 59.1 1.45 34.0
May 117 1995 1.59 1977 18.5 25.0 1.36 15.4
June 54.0 1971 0.303 1961 8.45 9.87 1.17 7.06
July 58.9 1993 0.071 1961 7.36 12.4 1.68 6.15
August 25.6 1985 0 m 2.77 5.09 1.84 2.31
September 4.79 1977 0.061 1976 1.71 1.27 0.74 1.43
Annual 43.5 1995 0.763 1961 9.98 10.0 1.01 100
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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 1.80 1.20 0.53 0.08 0 0.07 0.33 0.46 0 0
90 0 0 0 2.30 1.50 0.80 0.29 0.06 0.25 0.50 0.65 0 0
85 0 0 0 2.30 1.80 0.99 0.39 0.19 0.36 0.74 0.77 0.10 0.19
80 0 0 0.24 2.80 2.20 1.20 0.53 0.25 0.43 0.90 0.91 0.13 0.37
75 0 0 0.40 3.50 2.20 1.50 0.72 0.45 0.52 1.10 1.10 0.17 0.51
70 0 0 0.85 3.50 2.70 1.90 0.72 0.60 0.62 1.10 1.30 0.28 0.71
65 0 0 1.40 4.98 3.30 2.30 0.97 0.60 0.74 1.10 1.30 0.36 0.71
60 0 0 2.30 6.35 4.00 2.30 1.30 0.60 0.89 1.40 1.50 0.47 0.98
55 0.04 0 3.00 9.58 5.64 2.80 1.80 0.80 1.10 1.40 1.50 0.60 1.40
50 0.09 0.12 4.78 14.9 6.96 3.50 2.40 0.80 1.10 1.60 1.80 0.60 1.40
45 0.17 0.20 5.69 19.5 8.15 4.30 2.40 1.10 1.30 1.60 1.80 0.78 1.90
40 0.21 0.26 7.23 24.7 10.5 5.56 3.41 1.10 1.50 1.60 1.80 0.78 1.90
35 0.39 0.45 15.0 31.8 13.7 6.78 3.97 1.40 1.50 2.00 2.10 1.00 2.98
30 0.48 0.45 21.7 39.4 17.6 8.16 4.83 1.40 1.80 2.00 2.10 1.00 3.64
25 0.48 1.00 32.6 47.6 22.3 10.5 6.30 1.90 1.80 2.50 2.50 1.00 4.53
20 0.73 1.40 49.0 58.8 27.9 13.8 7.81 2.60 2.20 3.00 2.90 1.30 7.24
15 1.10 2.30 71.5 74.6 36.7 16.7 11.6 3.88 2.60 3.70 3.50 1.30 12.4
10 1.60 3.86 101 103 51.5 21.8 17.2 5.06 3.10 5.22 4.10 2.20 23.2
5 3.00 12.2 148 170 73.2 30.7 27.5 9.53 4.50 10.8 8.29 3.81 51.6
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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 5.50 3.47 2.77 2.04 1.67
0.95 1.05 14.9 10.2 8.05 5.72 4.28
0.90 1.11 24.7 17.4 13.6 9.59 6.96
0.80 1.25 44.0 31.9 24.9 17.4 12.3
0.50 2 123 90.5 70.4 50.1 35.1
0.20 5 308 223 173 129 93.7
0.10 10 477 338 263 203 153
0.04 25 738 506 395 320 253
0.02 50 963 643 503 421 346
0.01 100 1,210 788 618 534 457
0.005 200 1,480 939 737 658 585
0.002 500 1,870 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
1956 April 11 8.92 224 1977 September 24 5.51 20.0
1957 March 23 8.14 26.0 1978 March 27 8.78 148
1958 June 30 7.26 58.0 1979 April 20 9.45 1,000
1959 March 28 5.70 15.0 1980 August 20 6.33 34.0
1960 March 27 8.94 209 1981 June 16 7.15 53.0
1961 April 5 5.19 14.0 1982 April 3 -- 410
1962 March 24 8.51 110 1983 March 13 9.57 240
1963 June 8 7.32 65.0 1984 April 14 8.38 145
1964 April 1 8.18 54.0 1985 August 19 8.80 224
1965 April 9 8.43 95.0 1986 March 4 9.16 180
1966 March 15 9.21 410 1987 July 24 9.08 434
1967 March 26 9.94 300 1988 March 26 -- 80.0
1968 March 7 7.59 62.0 1989 March 29 7.95 70.0
1969 April 11 9.45 370 1990 September 29 5.81 18.0
1970 April 6 7.74 58.0 1991 September 23 -- 10.0
1971 April 2 10.25 300 1992 March 2 8.27 55.0
1972 March 15 9.09 177 1993 July 28 9.67 224
1973 February 27 9.41 18.0 1994 March 24 9.04 210
1974 May 20 8.36 160 1995 May 15 -- 455
1975 April 29 -- 160 1996 April 12 10.30 570
1976 March 20 -- 220 1997 April 20 -- 534
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 20 9.45 1,000 1978 March 27 8.78 148
1996 April 12 10.30 570 1984 April 14 8.38 145
1997 April 20 -- 534 1962 March 24 8.51 110
1995 May 15 -- 455 1965 April 9 8.43 95.0
1987 July 24 9.08 434 1988 March 26 -- 80.0
1966 March 15 9.21 410 1989 March 29 7.95 70.0
1982 April 3 -- 410 1963 June 8 7.32 65.0
1969 April 11 9.45 370 1968 March 7 7.59 62.0
1967 March 26 9.94 300 1958 June 30 7.26 58.0
1971 April 2 10.25 300 1970 April 6 7.74 58.0
1983 March 13 9.57 240 1992 March 2 8.27 55.0
1956 April 11 8.92 224 1964 April 1 8.18 54.0
1985 August 19 8.80 224 1981 June 16 7.15 53.0
1993 July 28 9.67 224 1980 August 20 6.33 34.0
1976 March 20 -- 220 1957 March 23 8.14 26.0
1994 March 24 9.04 210 1977 September 24 5.51 20.0
1960 March 27 8.94 209 1973 February 27 9.41 18.0
1986 March 4 9.16 180 1990 September 29 5.81 18.0
1972 March 15 9.09 177 1959 March 28 5.70 15.0
1974 May 20 8.36 160 1961 April 5 5.19 14.0
1975 April 29 -- 160 1991 September 23 -- 10.0
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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]
__________________________________________________________________________________________________________________________________
Year Oct. Nov. Dec. Jan. Feb. March April May June July Aug. Sept. Annual
__________________________________________________________________________________________________________________________________
1956 1.41 1.05 0.265 0.113 0 11.0 69.3 19.1 19.2 3.49 0.910 1.58 10.5
1957 1.32 2.77 0.377 0.152 0 5.39 4.25 4.27 2.39 1.58 1.05 2.11 2.15
1958 2.56 2.46 1.10 0.635 3.57 7.15 4.97 2.38 2.07 6.94 0.100 0.443 2.86
1959 1.07 1.50 0.103 0 0 6.50 2.99 2.58 1.13 0.406 0 0.190 1.38
1960 5.95 0.980 0.897 0.316 0 30.6 5.76 6.69 3.40 0.181 0.923 0.743 4.75
1961 0.555 0.710 0.168 0.035 0.193 1.80 3.09 1.64 0.303 0.071 0.029 0.560 0.763
1962 0.474 0.810 0.090 0 0 14.2 3.21 6.54 5.56 5.78 0.761 0.680 3.21
1963 1.10 1.53 0.800 0.045 0 2.87 3.79 4.37 6.73 1.58 0.984 0.310 2.01
1964 0.852 0.983 0.219 0.013 0.031 0.081 10.0 3.42 8.30 2.55 0.952 1.76 2.42
1965 1.40 1.61 0.097 0 0 3.38 26.7 5.49 1.82 4.02 0.994 2.55 3.99
1966 2.25 1.52 1.69 0 0 61.4 4.89 3.43 3.01 9.32 1.07 0.456 7.53
1967 1.06 1.73 0.161 0 0 36.2 28.9 28.7 2.49 0.559 0 0.168 8.40
1968 1.31 1.58 0.523 0.008 0.046 10.3 4.07 5.75 1.65 1.11 2.01 2.02 2.55
1969 1.54 1.94 0.436 0 0 0 100.5 15.2 2.52 3.04 1.33 0.921 10.5
1970 1.25 1.32 1.24 0.343 0.202 0.628 19.8 14.8 7.41 3.81 1.64 1.39 4.49
1971 1.80 2.15 0.790 0.162 0.204 6.14 90.5 14.3 54.0 9.01 1.84 1.34 15.1
1972 4.18 2.49 0.908 0.001 0 61.2 25.8 13.9 3.09 1.09 0.813 0.710 9.59
1973 1.57 2.32 0.742 2.32 5.86 6.15 5.11 2.25 1.81 0.780 0.720 1.09 2.53
1974 2.53 1.39 0.166 0 0.896 15.6 22.4 54.4 17.5 0.759 0.368 0.940 9.82
1975 1.38 1.92 1.05 0.177 0.429 13.2 72.5 50.2 14.6 18.7 1.04 1.75 14.8
1976 2.10 1.92 0.739 0.423 2.04 71.1 49.8 8.64 1.78 0.418 0.074 0.061 11.6
1977 0.990 0.265 0.134 0 0 3.73 2.66 1.59 0.869 1.02 0.800 4.79 1.41
1978 2.89 1.32 0.310 0.250 0.341 34.8 15.9 7.76 3.71 2.94 0.333 0.600 5.98
1979 1.21 1.26 1.02 0.303 0.368 0.689 74.3 41.7 9.32 13.6 4.67 1.08 12.5
1980 1.31 1.83 1.43 0.939 0.500 9.27 19.1 3.55 2.15 1.29 6.64 3.90 4.32
1981 5.22 5.92 2.55 0.003 12.9 36.9 13.9 7.02 17.1 5.22 1.61 3.57 9.29
1982 2.06 1.86 1.43 0.153 19.1 123.1 98.7 25.8 17.6 43.4 5.35 0.727 28.3
1983 11.8 10.4 6.27 4.10 26.7 111.3 54.7 28.6 8.43 3.48 1.60 1.66 22.4
1984 1.45 2.48 0.879 3.19 6.68 44.8 93.4 62.1 18.1 3.34 3.24 4.29 20.3
1985 4.37 3.36 0.661 0 7.61 24.8 25.2 9.96 4.22 5.70 25.6 4.39 9.68
1986 11.2 2.89 0.682 0.561 3.45 81.4 45.9 24.9 6.07 2.81 1.73 2.53 15.4
1987 3.69 2.54 1.09 1.29 3.01 48.5 41.8 13.2 10.4 41.0 5.71 2.24 14.6
1988 1.83 1.46 0.667 0.005 0.766 9.09 3.79 2.35 1.63 0.925 1.32 0.731 2.06
1989 0.502 1.32 0.735 0 0 13.5 10.5 2.04 1.84 1.06 1.22 1.84 2.89
1990 2.05 3.18 1.34 1.13 1.08 2.25 2.90 2.83 5.06 6.29 0.924 1.48 2.55
1991 0.432 0.633 1.03 1.05 1.61 3.33 2.13 2.65 1.12 1.03 1.08 2.46 1.54
1992 2.91 3.11 0.412 0.478 3.75 11.5 3.05 2.15 1.40 1.51 0.763 1.68 2.72
1993 1.52 2.36 1.40 0.127 0.452 27.2 7.69 4.84 12.7 58.9 22.5 4.68 12.2
1994 3.16 3.05 1.05 0.315 0.142 54.8 34.2 9.24 10.9 4.19 1.84 2.57 10.5
1995 34.5 39.0 21.2 3.11 0.638 145.8 108.9 116.7 27.3 14.8 4.34 1.99 43.5
1996 2.58 3.35 0.034 0 0 36.0 165.8 51.0 15.8 6.75 4.18 1.86 23.8
1997 2.98 3.79 3.35 3.10 2.82 43.7 324.4 88.3 18.4 14.7 3.25 1.16 42.3
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