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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 200 1996 5.48 1940 53.8 49.6 0.92 3.20
November 305 1972 8.74 1937 51.0 45.3 0.89 3.03
December 97.0 1972 4.75 1938 30.5 20.0 0.65 1.82
January 53.5 m 0.868 1940 20.3 12.7 0.62 1.21
February 61.1 1984 0.759 1940 20.4 13.1 0.64 1.21
March 1,310 1966 2.26 1940 181 243 1.34 10.8
April 3,410 1997 33.5 1931 585 588 1.01 34.8
May 909 1986 27.2 1931 228 201 0.88 13.6
June 2,140 1962 15.1 1934 197 304 1.54 11.7
July 2,810 1975 2.23 1936 187 404 2.16 11.1
August 910 1993 0 1936 72.3 148 2.04 4.30
September 518 1944 0.790 1936 54.1 80.1 1.48 3.22
Annual 440 1975 25.6 1934 142 95.9 0.68 100
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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 3.60 3.50 4.42 45.1 30.5 17.2 5.24 1.40 3.10 7.68 10.2 5.90 5.73
90 5.97 5.17 10.7 69.8 44.7 22.3 8.57 5.04 5.39 10.4 13.0 8.59 8.97
85 8.33 8.43 14.1 89.3 56.0 28.6 13.2 6.86 8.13 14.0 17.1 11.5 12.8
80 8.98 9.58 16.4 104 66.5 34.0 17.5 9.71 10.7 17.2 19.5 14.3 15.7
75 11.6 11.7 18.9 120 76.9 41.6 22.0 12.6 12.9 19.7 22.9 16.1 18.4
70 13.0 13.5 21.4 138 88.8 49.7 26.3 15.2 15.1 22.6 25.7 17.8 21.1
65 14.1 14.4 25.0 165 100 58.6 30.8 17.8 17.7 26.0 29.1 19.5 24.8
60 15.2 15.4 28.8 198 113 67.2 36.5 20.2 20.8 28.2 31.5 21.2 28.6
55 16.4 16.4 33.1 235 128 76.3 42.3 22.6 23.7 30.5 34.1 22.7 33.3
50 17.5 17.7 37.5 275 148 87.5 51.2 25.7 26.6 33.7 37.0 24.2 38.6
45 19.0 19.0 44.0 328 166 100 60.7 30.1 29.9 36.8 41.4 26.6 44.8
40 20.7 20.6 51.8 389 188 114 74.5 35.5 33.4 39.8 47.1 29.2 54.7
35 22.6 22.9 62.0 458 214 131 89.8 41.8 39.3 45.5 53.0 31.6 66.3
30 25.0 25.3 91.3 535 241 155 113 49.7 46.6 54.4 59.5 34.9 82.6
25 27.5 28.0 128 659 278 186 144 58.8 55.5 66.2 67.2 39.7 107
20 30.3 30.6 177 843 321 234 184 72.2 68.2 82.6 73.9 48.0 141
15 34.1 34.4 263 1,060 374 291 255 94.0 89.3 100 81.8 54.9 200
10 39.1 39.2 424 1,420 447 401 380 146 128 129 97.1 64.0 309
5 47.5 48.5 898 2,150 644 674 689 288 206 175 131 70.7 564
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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 ng 135 115 91.5 70.2
0.95 1.05 265 265 231 180 137
0.90 1.11 388 380 332 257 194
0.80 1.25 611 586 513 392 292
0.50 2 1,430 1,330 1,150 863 622
0.20 5 3,280 3,020 2,510 1,860 1,280
0.10 10 5,020 4,620 3,740 2,740 1,830
0.04 25 7,840 7,250 5,670 4,130 2,660
0.02 50 10,400 9,700 7,380 5,360 3,360
0.01 100 13,400 12,600 9,340 6,750 4,140
0.005 200 16,900 16,000 11,500 8,330 4,990
0.002 500 22,200 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
1931 April 10 -- 46.0 1965 April 11 23.37 5,960
1932 April 12 8.83 311 1966 March 18 23.31 5,000
1933 April 3 9.02 269 1967 March 30 16.68 1,820
1934 April 10 9.02 374 1968 March 30 8.92 406
1935 March 21 9.09 311 1969 April 11 25.55 10,400
1936 April 16 14.59 1,460 1970 April 12 12.85 802
1937 April 14 9.00 390 1971 April 10 9.81 493
1938 May 5 8.78 550 1972 March 19 19.36 2,590
1939 March 29 15.77 1,350 1973 March 18 -- 205
1940 April 7 10.29 510 1974 April 14 17.97 2,130
1941 April 4 12.71 800 1975 July 2 27.10 13,600
1942 May 6 10.94 762 1976 April 1 13.50 1,000
1943 April 2 22.60 4,530 1977 June 5 5.99 163
1944 August 20 12.81 998 1978 March 31 22.76 5,420
1945 March 20 19.38 2,660 1979 April 16 21.60 4,380
1946 March 22 17.05 1,670 1980 April 4 16.78 1,850
1947 April 13 20.26 3,380 1981 May 23 13.02 1,090
1948 April 8 14.44 1,310 1982 April 2 17.80 2,210
1949 April 8 11.17 602 1983 July 9 16.75 1,990
1950 April 7 -- 2,600 1984 March 29 19.27 2,940
1951 April 7 17.47 2,230 1985 June 5 15.53 1,940
1952 April 10 21.24 4,310 1986 March 28 20.50 3,440
1953 June 20 18.43 2,430 1987 March 13 13.19 954
1954 April 12 11.54 686 1988 April 4 10.55 648
1955 April 4 14.85 1,260 1989 April 6 22.80 5,380
1956 April 12 18.37 2,410 1990 April 3 12.40 600
1957 April 24 13.70 1,080 1991 May 6 10.66 576
1958 July 11 15.70 1,540 1992 June 22 -- 492
1959 June 23 11.81 699 1993 July 20 22.88 3,450
1960 April 30 15.12 1,390 1994 March 24 20.82 3,270
1961 May 19 9.90 480 1995 March 19 18.50 2,110
1962 June 11 23.56 6,140 1996 April 14 19.42 2,720
1963 June 7 14.76 1,300 1997 April 6 27.02 8,370
1964 April 22 16.40 1,740
Annual peak discharge, from highest to lowest, and corresponding gage height
1975 July 2 27.10 13,600 1979 April 16 21.60 4,380
1969 April 11 25.55 10,400 1952 April 10 21.24 4,310
1997 April 6 27.02 8,370 1993 July 20 22.88 3,450
1962 June 11 23.56 6,140 1986 March 28 20.50 3,440
1965 April 11 23.37 5,960 1947 April 13 20.26 3,380
1978 March 31 22.76 5,420 1994 March 24 20.82 3,270
1989 April 6 22.80 5,380 1984 March 29 19.27 2,940
1966 March 18 23.31 5,000 1996 April 14 19.42 2,720
1943 April 2 22.60 4,530 1945 March 20 19.38 2,660
1950 April 7 -- 2,600 1987 March 13 13.19 954
1972 March 19 19.36 2,590 1970 April 12 12.85 802
1953 June 20 18.43 2,430 1941 April 4 12.71 800
1956 April 12 18.37 2,410 1942 May 6 10.94 762
1951 April 7 17.47 2,230 1959 June 23 11.81 699
1982 April 2 17.80 2,210 1954 April 12 11.54 686
1974 April 14 17.97 2,130 1988 April 4 10.55 648
1995 March 19 18.50 2,110 1949 April 8 11.17 602
1983 July 9 16.75 1,990 1990 April 3 12.40 600
1985 June 5 15.53 1,940 1991 May 6 10.66 576
1980 April 4 16.78 1,850 1938 May 5 8.78 550
1967 March 30 16.68 1,820 1940 April 7 10.29 510
1964 April 22 16.40 1,740 1971 April 10 9.81 493
1946 March 22 17.05 1,670 1992 June 22 -- 492
1958 July 11 15.70 1,540 1961 May 19 9.90 480
1936 April 16 14.59 1,460 1968 March 30 8.92 406
1960 April 30 15.12 1,390 1937 April 14 9.00 390
1939 March 29 15.77 1,350 1934 April 10 9.02 374
1948 April 8 14.44 1,310 1932 April 12 8.83 311
1963 June 7 14.76 1,300 1935 March 21 9.09 311
1955 April 4 14.85 1,260 1933 April 3 9.02 269
1981 May 23 13.02 1,090 1973 March 18 -- 205
1957 April 24 13.70 1,080 1977 June 5 5.99 163
1976 April 1 13.50 1,000 1931 April 10 -- 46.0
1944 August 20 12.81 998
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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 -- -- -- -- -- -- 33.5 27.2 26.1 17.4 12.7 6.18 --
1932 13.3 18.0 14.0 10.8 11.5 54.2 123.0 51.4 31.6 6.66 2.85 5.73 28.5
1933 12.7 9.67 5.88 4.62 4.40 90.5 119.3 60.9 24.0 9.01 7.27 7.78 29.8
1934 15.3 17.6 15.0 11.0 15.0 38.0 141.3 28.5 15.1 4.09 1.45 5.73 25.6
1935 19.4 10.6 9.64 9.16 15.0 123.8 76.8 60.3 42.9 40.2 15.9 8.66 36.2
1936 16.8 9.99 6.29 2.97 1.00 65.0 579.1 98.3 17.6 2.23 0 0.790 66.1
1937 6.39 8.74 6.00 6.00 5.00 3.00 136.8 104.6 46.9 14.1 17.2 14.8 30.8
1938 11.4 10.7 4.75 4.34 5.46 105.7 51.2 247.1 85.4 17.1 7.00 7.23 46.9
1939 7.50 11.3 7.97 5.80 4.17 216.0 270.2 32.2 18.8 7.84 1.74 1.75 48.8
1940 5.48 10.5 8.16 0.868 0.759 2.26 228.8 64.1 18.0 6.26 11.1 5.78 29.9
1941 8.99 14.9 9.48 9.44 9.84 61.6 350.6 46.7 61.5 12.3 7.40 19.1 50.7
1942 25.5 23.9 11.2 2.24 1.56 29.1 87.1 295.8 208.7 35.8 31.4 152.7 75.6
1943 74.8 58.0 21.2 10.7 8.12 74.2 1,158 234.2 434.0 247.5 109.3 41.8 205.2
1944 28.5 36.7 15.5 8.65 9.76 23.4 214.3 230.1 263.4 473.3 710.0 517.5 211.5
1945 134.4 128.6 63.8 21.6 15.9 861.3 582.8 246.4 133.9 31.1 22.2 50.7 192.1
1946 49.1 31.0 20.6 13.1 9.52 441.4 229.8 101.0 86.9 269.4 53.1 32.2 112.4
1947 76.4 66.0 41.4 30.1 21.5 127.7 1,054 267.9 274.1 67.7 18.4 20.0 171.4
1948 27.1 25.7 22.6 17.0 16.2 44.4 618.1 98.7 62.1 34.7 23.6 14.6 83.0
1949 13.6 17.6 14.0 10.9 9.84 18.2 215.3 108.5 36.8 101.4 55.1 17.0 51.6
1950 24.9 28.9 21.5 9.55 6.18 202.5 1,577 852.2 167.5 53.1 16.1 12.7 247.5
1951 19.7 17.3 15.6 13.5 13.8 19.2 800.4 144.3 173.3 51.6 32.9 38.7 110.9
1952 57.2 44.5 38.6 27.3 26.7 28.8 1,284 120.1 32.7 507.9 231.9 91.7 206.9
1953 35.8 40.1 23.1 15.7 17.4 202.3 295.0 249.5 955.8 132.9 206.0 53.5 185.3
1954 29.7 31.1 26.1 22.1 31.9 98.9 358.0 263.3 142.7 45.5 20.3 25.8 91.2
1955 39.0 32.6 18.6 13.0 13.3 14.5 367.8 89.3 99.5 466.1 435.3 55.9 138.1
1956 44.9 30.6 20.9 16.8 20.1 25.0 1,034 221.4 98.2 26.0 23.7 14.1 130.2
1957 19.7 38.9 18.0 13.9 14.2 187.4 346.1 145.1 210.1 198.1 65.2 336.0 132.6
1958 186.2 159.7 51.4 31.6 26.6 60.7 115.9 77.8 139.5 653.1 53.8 79.8 137.4
1959 51.1 85.0 39.0 16.9 13.6 116.5 212.3 171.4 389.0 388.4 87.5 54.2 135.9
1960 52.0 40.5 35.0 34.3 26.9 62.3 837.1 356.5 126.0 103.0 42.0 44.2 146.0
1961 27.4 30.9 20.7 17.5 16.5 142.6 162.7 247.2 51.9 19.4 9.02 16.2 63.9
1962 26.2 22.1 15.1 9.89 11.4 15.0 673.6 906.2 2,138 563.4 153.4 65.5 382.6
1963 56.1 68.1 35.4 9.60 6.23 94.7 232.4 158.5 492.2 29.8 70.6 101.8 112.6
1964 38.2 34.1 20.6 16.8 18.1 44.5 854.1 349.1 119.2 43.5 18.4 29.0 131.4
1965 34.8 34.6 14.6 15.8 16.4 17.0 1,392 309.2 260.8 77.6 40.3 55.8 187.8
1966 110.7 73.2 65.3 36.5 29.1 1,308 638.6 405.5 105.3 82.5 185.7 49.1 259.8
1967 57.9 43.3 33.9 36.3 39.9 195.1 851.3 280.7 328.1 84.1 20.5 16.0 165.0
1968 20.3 19.8 19.0 10.5 10.3 92.4 169.1 129.4 108.1 75.5 22.4 32.6 59.1
1969 57.1 53.3 27.4 17.3 15.0 17.9 1,903 195.6 63.8 98.4 31.7 17.2 206.4
1970 35.2 40.6 25.3 19.1 18.4 42.8 439.5 258.5 245.3 51.4 9.10 9.44 99.3
1971 20.3 34.5 18.5 12.5 13.7 83.6 255.3 84.4 59.3 116.1 21.2 122.0 70.0
1972 185.6 305.4 97.0 34.9 30.4 714.4 622.7 419.6 134.9 44.8 46.6 29.5 222.7
1973 28.2 42.6 25.0 15.7 15.7 122.2 97.6 66.8 36.2 22.9 23.5 131.7 52.4
1974 184.2 82.5 56.4 30.5 32.6 52.0 773.8 455.6 186.1 69.0 55.0 29.7 167.3
1975 33.0 46.6 27.4 20.2 19.0 27.0 951.1 394.4 805.1 2,814 78.9 31.4 440.5
1976 48.0 58.7 33.2 25.3 28.5 194.5 306.6 66.5 23.8 10.1 1.74 2.54 66.5
1977 8.42 12.5 8.46 8.82 9.37 41.4 89.3 35.2 37.0 28.7 5.48 36.7 26.7
1978 96.6 67.9 66.9 51.2 30.7 388.5 1,984 187.5 61.3 36.3 13.4 9.52 248.2
1979 12.8 19.3 18.1 14.3 13.0 17.9 1,335 323.0 121.9 187.9 53.7 16.8 177.0
1980 18.7 60.1 33.7 21.6 23.8 67.7 496.5 58.4 33.9 12.9 10.4 29.8 71.7
1981 34.4 37.0 24.3 17.5 29.0 61.6 83.4 152.1 46.8 40.4 61.5 37.5 52.3
1982 79.4 72.3 33.2 13.3 14.4 237.9 714.5 152.2 55.5 77.9 27.0 17.7 124.5
1983 131.8 58.8 44.9 25.4 26.6 202.7 145.7 103.8 75.8 806.9 106.4 59.8 150.8
1984 77.6 71.0 46.0 28.8 61.1 617.9 534.9 126.1 564.1 55.2 13.3 10.8 183.3
1985 150.9 70.4 41.5 26.0 20.7 343.2 174.8 644.0 624.0 146.9 97.0 140.7 207.7
1986 114.2 79.0 58.2 46.7 44.3 581.2 1,364 908.9 436.2 152.4 58.0 200.8 337.4
1987 135.3 116.1 80.1 53.5 55.7 554.0 228.6 154.4 65.7 35.2 35.9 27.0 129.3
1988 30.8 45.8 38.1 23.3 22.5 263.3 274.9 80.9 29.4 8.18 13.3 14.1 70.4
1989 17.2 23.9 22.0 21.0 19.7 49.9 1,359 134.7 56.0 17.2 17.6 93.8 151.2
1990 36.3 32.2 19.7 20.4 23.6 106.0 217.4 141.8 135.8 37.2 11.0 10.9 66.0
1991 22.9 46.4 25.9 14.7 19.1 82.8 138.3 260.5 110.7 150.1 19.6 17.1 76.1
1992 25.5 35.0 33.1 30.8 38.2 171.1 105.2 75.3 180.1 152.1 33.0 52.3 77.7
1993 32.7 55.9 35.9 25.5 27.0 125.3 632.6 149.5 257.4 1,495 910.5 158.7 328.5
1994 83.1 73.4 66.8 53.5 50.1 630.8 536.3 292.9 116.1 155.4 66.2 49.6 182.1
1995 119.6 109.7 61.2 46.0 48.3 682.2 459.8 279.6 76.7 206.6 45.3 33.4 181.9
1996 200.0 118.9 61.2 38.0 35.0 152.7 1,069 720.8 223.9 52.1 32.3 26.4 227.2
1997 54.3 110.3 56.2 36.6 34.1 33.5 3,412 451.4 331.2 461.5 103.1 107.4 429.8
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