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Statistics of monthly and annual mean discharges
__________________________________________________________________________________________________________
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 614 1974 6.10 1933 90.6 103 1.13 4.06
November 488 1972 9.31 1933 81.0 77.2 0.95 3.63
December 202 1995 6.00 1933 54.0 37.9 0.70 2.42
January 132 1996 4.00 1933 41.9 28.3 0.68 1.88
February 137 1996 4.00 1933 39.2 26.5 0.68 1.76
March 828 1995 12.8 1940 139 162 1.16 6.23
April 2,470 1997 73.8 1931 607 487 0.80 27.2
May 2,260 1950 30.9 1977 430 344 0.80 19.3
June 1,560 1943 26.4 1977 306 288 0.94 13.7
July 1,930 1909 8.04 1934 249 337 1.36 11.1
August 1,030 1993 3.02 1932 109 178 1.63 4.88
September 788 1973 2.96 1936 86.7 121 1.39 3.88
Annual 500 1950 22.7 1977 183 109 0.60 100
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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 8.92 9.30 16.0 69.1 67.6 39.5 13.0 4.78 4.44 7.71 12.7 8.46 9.63
90 11.2 12.0 20.5 95.2 94.0 57.4 24.1 7.58 6.26 12.2 17.7 13.0 16.0
85 15.3 14.0 24.2 128 128 72.0 32.8 13.8 10.8 15.5 22.5 18.0 20.7
80 17.0 17.9 27.7 150 156 86.0 41.7 19.4 14.3 19.1 25.8 20.8 25.9
75 19.6 20.1 31.6 174 178 103 51.8 23.8 18.5 23.4 29.1 22.7 31.5
70 23.2 23.2 36.3 199 200 120 60.8 28.1 22.6 28.2 34.1 27.5 37.3
65 26.5 25.1 41.8 236 226 139 68.6 32.6 26.8 33.5 40.8 32.8 44.5
60 30.3 26.7 47.6 284 256 154 77.0 37.6 31.8 38.5 46.3 37.0 52.0
55 33.5 31.0 52.6 332 291 170 88.6 43.3 36.6 44.7 52.1 40.9 59.8
50 36.5 34.2 58.0 381 328 186 102 50.3 43.5 52.1 58.6 45.9 69.6
45 40.0 37.5 64.5 435 371 211 116 59.0 52.1 60.5 65.4 51.8 80.8
40 44.1 40.2 71.0 503 417 242 138 68.4 61.8 72.5 77.6 56.1 97.7
35 47.4 44.0 77.4 577 464 274 168 78.5 72.1 88.5 87.2 60.1 118
30 52.9 49.0 91.0 673 510 311 210 91.9 85.4 106 96.1 66.5 141
25 58.5 53.2 121 829 569 364 257 110 104 123 105 74.9 178
20 63.6 57.5 147 978 638 426 335 136 130 141 118 86.7 233
15 69.0 62.9 196 1,140 720 507 436 175 162 166 133 98.3 323
10 80.8 72.4 304 1,370 821 645 600 235 202 206 157 108 480
5 98.2 91.1 600 1,880 1,160 996 929 383 295 277 221 126 770
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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 1.01 128 103 90.4 82.3 71.2
0.95 1.05 270 223 201 178 151
0.90 1.11 394 329 299 260 219
0.80 1.25 615 514 467 400 333
0.50 2 1,370 1,120 1,010 833 680
0.20 5 2,880 2,240 1,940 1,560 1,250
0.10 10 4,140 3,110 2,610 2,080 1,640
0.04 25 5,990 4,300 3,490 2,740 2,140
0.02 50 7,530 5,230 4,150 3,220 2,510
0.01 100 9,200 6,180 4,790 3,690 2,860
0.005 200 11,000 7,160 5,420 4,150 3,190
0.002 500 13,500 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
1909 July 22 20.00 9,200 1960 April 15 4.80 716
1910 April 26 9.60 1,610 1961 May 17 5.29 847
1911 April 22 6.70 473 1962 June 9 9.83 2,760
1912 May 12 7.55 758 1963 May 30 8.00 1,680
1913 April 2 9.60 1,610 1964 April 17 7.68 1,640
1914 June 10 8.50 1,120 1965 April 12 10.48 3,160
1915 June 29 11.10 2,340 1966 April 2 8.90 2,120
1916 June 1 -- 1,670 1967 April 1 9.09 1,710
1917 April 3 -- 719 1968 March 30 4.33 594
1931 May 21 -- 112 1969 April 10 11.83 4,850
1932 April 9 3.59 358 1970 April 30 7.97 1,740
1933 May 23 3.27 450 1971 April 10 6.01 1,060
1934 April 12 2.60 266 1972 March 21 9.66 2,220
1935 July 14 -- 216 1973 September 4 7.75 1,670
1936 April 14 9.27 2,490 1974 April 12 11.03 3,890
1937 May 3 3.32 301 1975 July 1 11.29 3,660
1938 May 12 5.82 836 1976 March 29 7.10 1,250
1939 March 30 4.44 459 1977 April 21 2.29 146
1940 April 9 7.28 1,100 1978 April 7 13.64 6,470
1941 April 3 6.11 828 1979 April 18 12.93 6,010
1941 June 9 5.77 828 1980 April 3 6.08 1,080
1942 May 3 8.15 1,550 1981 September 6 3.45 295
1943 June 4 11.74 4,120 1982 April 19 6.51 1,200
1944 July 8 7.86 1,560 1983 March 7 6.44 635
1945 April 2 8.15 1,520 1984 June 11 6.96 1,370
1946 March 24 7.60 1,490 1985 May 13 11.42 4,100
1947 April 15 9.47 2,510 1986 May 13 8.38 1,960
1948 April 9 5.65 916 1987 July 24 6.91 1,280
1949 July 8 7.94 1,610 1988 April 5 6.28 711
1950 June 26 12.02 4,380 1989 April 5 13.65 5,260
1951 April 9 8.31 1,820 1990 April 3 6.31 1,090
1952 April 8 8.27 1,810 1991 May 6 4.96 682
1953 July 4 6.44 1,170 1992 August 25 -- 791
1954 April 10 7.09 1,390 1993 July 28 11.74 3,980
1955 April 4 5.57 927 1994 June 21 8.37 1,810
1956 April 12 6.99 1,380 1995 March 15 10.94 2,500
1957 April 21 5.17 814 1996 April 14 12.35 3,700
1958 July 7 3.00 294 1997 April 6 15.91 10,000
1959 May 6 3.73 451
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 6 15.91 10,000 1989 April 5 13.65 5,260
1909 July 22 20.00 9,200 1969 April 10 11.83 4,850
1978 April 7 13.64 6,470 1950 June 26 12.02 4,380
1979 April 18 12.93 6,010 1943 June 4 11.74 4,120
1985 May 13 11.42 4,100 1982 April 19 6.51 1,200
1993 July 28 11.74 3,980 1953 July 4 6.44 1,170
1974 April 12 11.03 3,890 1940 April 9 7.28 1,100
1996 April 14 12.35 3,700 1990 April 3 6.31 1,090
1975 July 1 11.29 3,660 1980 April 3 6.08 1,080
1965 April 12 10.48 3,160 1971 April 10 6.01 1,060
1962 June 9 9.83 2,760 1955 April 4 5.57 927
1947 April 15 9.47 2,510 1948 April 9 5.65 916
1995 March 15 10.94 2,500 1961 May 17 5.29 847
1936 April 14 9.27 2,490 1938 May 12 5.82 836
1915 June 29 11.10 2,340 1941 April 3 6.11 828
1972 March 21 9.66 2,220 1941 June 9 5.77 828
1966 April 2 8.90 2,120 1957 April 21 5.17 814
1986 May 13 8.38 1,960 1992 August 25 -- 791
1951 April 9 8.31 1,820 1912 May 12 7.55 758
1952 April 8 8.27 1,810 1917 April 3 -- 719
1994 June 21 8.37 1,810 1960 April 15 4.80 716
1970 April 30 7.97 1,740 1988 April 5 6.28 711
1967 April 1 9.09 1,710 1991 May 6 4.96 682
1963 May 30 8.00 1,680 1983 March 7 6.44 635
1916 June 1 -- 1,670 1968 March 30 4.33 594
1973 September 4 7.75 1,670 1911 April 22 6.70 473
1964 April 17 7.68 1,640 1939 March 30 4.44 459
1910 April 26 9.60 1,610 1959 May 6 3.73 451
1913 April 2 9.60 1,610 1933 May 23 3.27 450
1949 July 8 7.94 1,610 1932 April 9 3.59 358
1944 July 8 7.86 1,560 1937 May 3 3.32 301
1942 May 3 8.15 1,550 1981 September 6 3.45 295
1945 April 2 8.15 1,520 1958 July 7 3.00 294
1946 March 24 7.60 1,490 1934 April 12 2.60 266
1954 April 10 7.09 1,390 1935 July 14 -- 216
1956 April 12 6.99 1,380 1977 April 21 2.29 146
1984 June 11 6.96 1,370 1914 June 10 8.50 112
1987 July 24 6.91 1,280 1931 May 21 -- 112
1976 March 29 7.10 1,250
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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
__________________________________________________________________________________________________________________________________
1909 -- -- -- -- -- -- -- -- -- 1,923 959.8 286.4 --
1910 105.4 136.4 120.0 100.0 80.0 80.0 552.0 562.9 274.0 53.8 21.0 21.6 175.6
1911 24.5 25.4 21.0 22.0 18.0 70.0 238.5 200.2 103.6 132.6 33.3 25.5 76.5
1912 133.6 32.4 35.0 31.0 13.0 25.0 179.2 416.4 117.1 49.5 33.0 105.8 97.9
1913 162.7 68.1 19.0 12.4 8.93 40.5 451.6 118.2 309.1 82.8 107.1 52.1 119.2
1914 57.2 75.6 54.0 21.1 14.1 36.8 251.9 210.6 542.8 336.5 118.8 138.9 154.9
1915 120.6 95.9 69.5 29.7 33.9 59.0 248.6 408.9 747.7 773.5 246.4 138.8 248.8
1916 109.6 81.4 53.9 36.8 27.6 76.8 989.3 654.0 844.3 717.1 257.8 205.0 337.4
1917 148.3 110.6 79.2 59.5 40.0 111.3 417.6 214.4 82.5 46.9 26.9 50.8 115.7
1930 -- -- -- -- -- -- -- -- -- -- 10.1 11.0 --
1931 14.3 28.2 20.0 15.0 25.0 29.9 73.8 58.1 60.4 30.9 26.3 9.89 32.6
1932 16.7 24.2 20.0 35.0 25.0 70.5 137.8 127.8 63.6 13.3 3.02 4.65 45.1
1933 6.10 9.31 6.00 4.00 4.00 162.1 206.6 126.0 98.5 19.6 5.41 4.90 54.5
1934 12.0 15.9 12.0 9.00 12.0 15.0 141.0 70.1 26.8 8.04 4.79 4.56 27.5
1935 7.85 13.1 8.69 12.1 12.1 66.6 109.6 135.7 86.1 130.6 84.6 64.4 61.3
1936 41.4 34.0 25.7 14.2 10.0 19.8 607.1 252.4 85.9 16.7 3.37 2.96 92.3
1937 6.78 10.4 7.79 9.57 11.1 15.5 86.9 205.9 121.8 51.2 56.9 50.9 53.1
1938 33.1 32.3 10.4 16.5 18.5 80.3 89.6 539.1 237.8 116.4 40.0 16.0 103.3
1939 14.6 17.8 21.4 17.5 18.0 75.7 247.1 88.9 71.5 44.0 13.9 13.7 53.6
1940 16.2 16.1 15.9 9.24 9.34 12.8 295.4 191.5 83.1 19.5 17.6 5.22 57.5
1941 16.6 28.1 25.4 23.3 16.1 42.1 441.3 260.8 334.4 59.6 85.6 199.0 127.2
1942 218.2 102.3 53.7 18.9 20.6 134.3 326.3 650.9 241.4 102.8 96.8 275.8 187.7
1943 141.4 91.3 49.1 38.4 36.5 110.6 957.8 610.4 1,560 298.4 142.0 57.1 340.0
1944 44.0 41.5 22.5 21.5 23.3 31.9 169.7 384.6 456.4 736.1 502.5 487.5 244.2
1945 242.9 145.4 97.3 68.2 59.3 746.9 1,219 580.5 198.1 82.9 74.7 130.6 304.5
1946 183.4 100.9 73.9 47.7 39.6 507.4 713.3 400.6 215.5 131.0 28.0 33.3 206.9
1947 166.2 115.4 74.7 58.4 52.5 113.5 1,274 860.9 736.1 174.6 75.9 68.9 313.8
1948 82.6 64.1 56.5 50.4 27.3 60.8 606.2 313.7 115.0 79.5 34.7 10.7 124.9
1949 13.0 26.2 28.4 28.8 24.1 27.4 286.2 269.9 298.2 840.6 470.7 106.9 203.4
1950 83.5 110.5 105.6 38.7 45.5 157.2 1,302 2,259 1,069 646.1 110.5 48.9 500.3
1951 122.6 81.2 73.1 66.3 70.4 92.0 1,104 774.8 291.8 88.4 55.6 123.1 245.0
1952 132.2 102.4 116.8 93.4 77.3 79.9 907.9 349.5 87.5 185.6 118.8 53.7 191.7
1953 32.6 43.9 50.2 37.6 36.0 205.5 390.2 389.9 439.3 517.0 199.3 76.8 202.5
1954 46.3 51.7 68.1 65.9 72.9 111.2 654.5 536.4 257.6 97.7 27.0 27.1 167.9
1955 40.8 50.8 41.1 31.5 33.7 37.9 485.2 259.7 230.7 121.0 38.8 11.3 115.0
1956 17.5 18.4 14.3 12.9 16.8 21.2 521.9 326.9 159.6 28.8 16.8 13.3 96.9
1957 14.3 33.4 19.1 16.1 18.9 112.6 350.7 269.4 248.8 308.8 81.0 152.9 135.8
1958 148.2 184.0 66.4 48.3 42.7 96.9 142.8 76.2 128.1 139.0 33.6 23.8 94.3
1959 29.1 57.6 37.9 24.6 22.0 79.1 203.1 222.6 172.0 154.6 65.7 24.1 91.4
1960 45.4 47.2 45.6 46.4 42.2 64.5 458.8 315.2 352.8 153.4 77.3 135.3 148.2
1961 81.4 62.3 56.4 36.3 34.7 134.7 229.3 494.0 138.4 46.1 22.2 31.7 114.6
1962 35.6 47.6 31.0 26.9 24.6 37.9 402.2 717.5 1,226 454.4 143.4 96.7 270.5
1963 68.1 71.6 42.5 9.65 6.50 66.0 325.2 390.6 641.6 112.2 49.1 48.2 152.5
1964 26.1 28.7 22.4 24.5 29.6 38.9 670.8 547.4 444.8 162.1 37.0 37.3 171.9
1965 62.6 51.7 32.1 33.1 34.4 33.1 1,241 639.1 607.4 177.6 45.7 55.9 250.3
1966 125.9 73.3 102.5 70.8 40.4 577.1 1,190 785.8 222.4 85.0 139.5 80.8 292.1
1967 75.5 61.3 51.8 60.8 64.2 205.3 977.3 491.3 405.7 231.1 38.2 16.6 223.0
1968 23.6 24.1 43.7 30.1 21.2 177.9 327.7 284.0 182.2 141.6 62.7 74.7 116.3
1969 118.4 95.4 59.6 55.5 59.1 64.4 1,357 458.8 250.9 80.9 44.4 32.0 222.1
1970 134.3 134.7 102.8 65.7 52.4 58.0 870.9 759.8 606.2 152.8 25.9 17.4 248.3
1971 27.5 66.4 40.4 33.8 36.2 101.9 599.4 278.8 126.4 53.8 31.9 52.4 120.5
1972 364.1 487.6 122.7 77.1 58.4 466.2 1,034 723.2 258.4 96.0 98.7 56.4 320.1
1973 72.5 65.6 35.7 37.3 39.9 276.5 207.5 179.8 132.6 74.5 81.8 788.4 165.6
1974 613.5 203.1 95.5 64.7 60.5 62.0 1,452 1,223 474.9 90.8 59.8 34.6 370.2
1975 48.3 107.1 65.5 51.3 52.2 74.6 1,173 825.3 662.2 1,175 154.7 49.2 371.1
1976 48.7 86.1 61.5 58.6 61.8 316.3 568.7 152.8 65.4 32.4 7.85 4.01 121.7
1977 10.7 12.2 7.65 8.39 12.6 29.4 91.1 30.9 26.4 12.7 5.72 25.2 22.7
1978 68.0 112.6 113.6 68.5 47.4 74.7 1,508 307.8 131.2 75.7 68.5 99.8 221.8
1979 48.8 42.6 37.1 34.8 41.8 82.5 1,543 832.6 301.0 357.6 55.9 36.7 284.4
1980 27.0 100.9 59.5 46.1 48.0 73.2 504.0 124.1 30.2 10.8 8.19 11.5 86.3
1981 19.2 25.7 18.6 15.6 21.0 54.5 85.9 74.3 132.0 160.0 92.5 143.3 70.3
1982 224.3 184.5 83.8 53.9 50.0 172.7 875.5 575.3 200.0 61.0 24.6 14.7 210.1
1983 138.9 122.0 49.7 44.0 44.6 389.5 237.4 152.4 184.9 344.5 108.5 61.5 157.4
1984 -- -- -- -- -- -- -- -- -- -- -- -- --
1989 -- -- -- -- -- -- -- -- -- -- -- -- --
1990 39.7 39.1 16.2 17.4 22.7 164.9 307.4 226.8 173.2 59.2 11.4 5.39 90.4
1991 10.3 19.7 16.0 17.0 26.9 93.0 163.1 419.8 103.0 99.0 20.0 20.1 84.5
1992 20.6 26.0 32.8 38.6 41.0 286.7 156.8 177.8 65.3 313.5 188.2 208.7 130.3
1993 62.7 74.7 71.5 66.2 63.5 228.5 545.8 273.1 342.7 1,079 1,024 281.7 345.4
1994 111.2 100.3 97.5 91.6 90.8 290.7 639.6 499.0 517.1 575.8 193.3 238.0 287.7
1995 395.1 336.6 201.5 128.5 114.8 828.3 661.0 538.3 193.1 569.4 207.2 114.1 359.7
1996 236.7 190.4 133.2 131.6 136.9 134.5 1,645 1,159 306.8 90.6 51.0 31.5 353.1
1997 58.9 215.0 103.1 103.0 110.4 121.7 2,471 648.0 360.8 895.9 222.7 111.2 450.9
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