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Last update: Tuesday, 24-Aug-2004 12:38:26 EDT
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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 637 1986 0 m 87.4 148 1.69 4.24
November 844 1972 0 m 67.5 128 1.90 3.27
December 206 1945 0 m 20.3 42.2 2.07 0.99
January 100 1910 0 m 5.68 14.7 2.58 0.28
February 45.0 1910 0 m 3.43 8.60 2.51 0.17
March 773 1995 0 m 75.8 144 1.90 3.67
April 2,830 1966 7.75 1981 597 575 0.96 28.9
May 4,270 1950 1.83 1990 492 687 1.40 23.8
June 1,770 1962 0.032 1980 297 386 1.30 14.4
July 2,100 1975 0 m 222 349 1.57 10.8
August 1,010 1993 0 m 98.0 199 2.03 4.75
September 1,010 1993 0 m 97.2 197 2.03 4.71
Annual 607 1966 1.28 1939 171 155 0.90 100
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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 1.30 2.86 0.25 0 0 0 0 0 0 0
90 0 0 0 6.82 6.20 1.00 0.08 0 0 0 0 0 0
85 0 0 0 15.3 13.4 2.10 0.52 0 0 0 0 0 0
80 0 0 0 25.8 24.3 6.46 1.50 0.09 0.08 0 0.04 0 0
75 0 0 0 41.9 35.8 13.5 4.02 0.29 0.23 0.17 0.17 0 0.17
70 0 0 0 61.8 51.6 21.3 7.62 0.61 0.45 0.69 0.47 0.08 0.55
65 0 0 0.09 92.4 71.6 29.7 11.6 1.30 0.91 1.60 0.96 0.16 1.20
60 0 0 0.28 135 101 42.7 19.3 1.90 1.80 2.80 1.90 0.23 1.80
55 0.09 0 0.40 192 139 63.0 27.0 4.32 3.18 5.15 3.57 0.64 4.30
50 0.11 0.02 0.58 258 189 92.7 37.2 7.33 4.56 8.17 4.78 0.90 7.83
45 0.26 0.09 1.20 347 251 129 52.3 13.3 8.43 12.4 7.52 1.30 14.1
40 0.76 0.20 1.80 453 323 169 76.8 19.4 16.4 18.9 11.1 2.99 24.6
35 0.99 0.61 3.38 572 404 214 117 25.9 26.1 32.0 20.5 4.36 39.4
30 1.70 0.80 6.68 734 512 284 190 38.3 40.9 50.2 32.8 7.79 62.5
25 2.20 1.40 12.7 894 661 388 274 65.2 68.3 89.3 56.3 13.4 108
20 4.33 1.80 32.6 1,050 857 532 380 102 109 144 98.9 18.6 192
15 5.94 2.40 63.9 1,300 1,110 705 510 185 205 209 158 36.3 322
10 18.4 8.68 166 1,700 1,460 902 681 316 324 332 229 60.8 545
5 38.7 29.7 557 2,450 1,990 1,390 1,040 582 590 474 342 105 993
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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 29.2 24.5 16.2 10.0
0.95 1.05 266 125 103 70.6 46.1
0.90 1.11 412 241 199 139 93.9
0.80 1.25 667 478 397 290 202
0.50 2 1,460 1,310 1,130 896 674
0.20 5 2,710 2,510 2,290 2,010 1,630
0.10 10 3,510 3,140 12,860 12,460 11,970
0.04 25 4,440 3,700 13,370 12,900 12,320
0.02 50 5,060 3,990 13,630 13,120 12,500
0.01 100 5,610 4,190 13,810 13,280 12,620
0.005 200 6,100 4,340 13,950 13,400 12,720
0.002 500 6,670 ng ng ng ng
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1Statistical adjustment based on correlation between 3-, 7-, 15-,
and 30-consecutive-day periods.
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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 19 10.60 1,970 1955 April 8 10.72 958
1910 April 3 9.05 1,440 1956 April 21 10.57 1,840
1911 April 26 5.40 127 1957 September 3 9.97 1,630
1912 September 30 5.60 164 1958 October 17 7.67 828
1913 April 7 14.00 1,530 1959 April 5 8.48 950
1914 June 11 7.42 795 1960 April 6 12.11 1,100
1915 June 30 10.66 1,920 1961 March 24 7.49 441
1916 April 23 14.50 4,080 1962 June 10 12.68 2,800
1917 April 11 12.72 2,600 1963 April 8 11.43 2,180
1919 July 10 16.30 5,040 1964 August 2 12.05 2,480
1920 April 8 -- 1,780 1965 April 12 14.99 4,110
1921 April 6 -- 1,700 1966 April 3 15.66 3,320
1922 May 12 11.90 2,680 1967 April 21 13.26 3,100
1923 April 21 8.40 1,160 1968 July 18 10.84 1,950
1924 April 21 5.30 145 1969 April 13 13.55 3,190
1925 June 11 9.10 1,420 1970 June 17 12.72 2,820
1926 June 25 -- 1,660 1971 April 9 11.40 1,780
1929 March 18 13.71 1,870 1972 April 18 11.73 2,340
1930 May 12 7.26 776 1973 September 29 7.86 871
1931 April 15 -- 39.0 1974 April 21 13.37 3,160
1932 April 8 9.25 1,340 1975 July 2 14.17 3,260
1933 April 18 6.35 470 1976 April 1 12.75 1,350
1934 April 7 5.67 150 1977 May 19 6.35 403
1935 April 13 -- 318 1978 April 18 12.57 2,740
1936 April 19 - 890 1979 April 24 14.11 3,590
1937 August 3 9.75 1,160 1980 April 7 10.45 1,710
1938 May 19 9.00 1,130 1981 June 28 7.08 620
1939 April 27 4.82 35.0 1982 May 4 11.27 2,130
1940 April 15 7.85 728 1983 March 7 14.19 1,500
1941 June 12 7.82 822 1984 June 9 9.80 1,520
1942 May 2 9.69 1,480 1985 June 28 11.27 2,130
1943 April 8 9.43 1,060 1986 May 1 11.82 2,420
1944 June 6 7.15 666 1987 March 26 13.23 1,570
1945 April 11 10.24 1,650 1988 April 4 10.37 1,170
1946 April 6 8.77 1,170 1989 April 16 14.31 2,300
1947 June 11 9.84 1,560 1990 April 1 6.11 150
1948 April 19 10.67 1,850 1991 May 23 6.07 314
1949 June 1 10.00 1,620 1992 April 22 -- 1,220
1950 May 13 17.38 5,610 1993 August 31 -- 2,180
1951 May 2 9.81 1,630 1994 July 9 11.38 1,960
1952 April 8 10.72 1,500 1995 March 29 11.78 2,080
1953 June 2 6.37 429 1996 May 18 13.86 3,350
1954 April 12 7.61 624 1997 April 22 15.20 4,120
Annual peak discharge, from highest to lowest, and corresponding gage height
1950 May 13 17.38 5,610 1947 June 11 9.84 1,560
1919 July 10 16.30 5,040 1913 April 7 14.00 1,530
1997 April 22 15.20 4,120 1984 June 9 9.80 1,520
1965 April 12 14.99 4,110 1952 April 8 10.72 1,500
1916 April 23 14.50 4,080 1983 March 7 14.19 1,500
1979 April 24 14.11 3,590 1942 May 2 9.69 1,480
1996 May 18 13.86 3,350 1910 April 3 9.05 1,440
1966 April 3 15.66 3,320 1925 June 11 9.10 1,420
1975 July 2 14.17 3,260 1976 April 1 12.75 1,350
1969 April 13 13.55 3,190 1932 April 8 9.25 1,340
1974 April 21 13.37 3,160 1992 April 22 -- 1,220
1967 April 21 13.26 3,100 1946 April 6 8.77 1,170
1970 June 17 12.72 2,820 1988 April 4 10.37 1,170
1962 June 10 12.68 2,800 1923 April 21 8.40 1,160
1978 April 18 12.57 2,740 1937 August 3 9.75 1,160
1922 May 12 11.90 2,680 1938 May 19 9.00 1,130
1917 April 11 12.72 2,600 1960 April 6 12.11 1,100
1964 August 2 12.05 2,480 1943 April 8 9.43 1,060
1986 May 1 11.82 2,420 1955 April 8 10.72 958
1972 April 18 11.73 2,340 1959 April 5 8.48 950
1989 April 16 14.31 2,300 1936 April 19 - 890
1963 April 8 11.43 2,180 1973 September 29 7.86 871
1993 August 31 -- 2,180 1958 October 17 7.67 828
1982 May 4 11.27 2,130 1941 June 12 7.82 822
1985 June 28 11.27 2,130 1914 June 11 7.42 795
1995 March 29 11.78 2,080 1930 May 12 7.26 776
1909 July 19 10.60 1,970 1940 April 15 7.85 728
1994 July 9 11.38 1,960 1944 June 6 7.15 666
1968 July 18 10.84 1,950 1954 April 12 7.61 624
1915 June 30 10.66 1,920 1981 June 28 7.08 620
1929 March 18 13.71 1,870 1933 April 18 6.35 470
1948 April 19 10.67 1,850 1961 March 24 7.49 441
1956 April 21 10.57 1,840 1953 June 2 6.37 429
1920 April 8 -- 1,780 1977 May 19 6.35 403
1971 April 9 11.40 1,780 1935 April 13 -- 318
1980 April 7 10.45 1,710 1991 May 23 6.07 314
1921 April 6 -- 1,700 1912 September 30 5.60 164
1926 June 25 -- 1,660 1934 April 7 5.67 150
1945 April 11 10.24 1,650 1990 April 1 6.11 150
1951 May 2 9.81 1,630 1924 April 21 5.30 145
1957 September 3 9.97 1,630 1911 April 26 5.40 127
1949 June 1 10.00 1,620 1931 April 15 -- 39.0
1987 March 26 13.23 1,570 1939 April 27 4.82 35.0
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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
__________________________________________________________________________________________________________________________________
1909 -- -- -- -- -- -- -- -- -- 444.0 395.7 299.7 --
1910 362.7 290.2 200.0 100.0 45.0 330.0 1,151 438.5 160.3 108.5 44.2 8.12 270.3
1911 0 0 0 0 0 12.2 46.2 6.88 10.1 1.34 0.242 0.483 6.42
1912 1.13 0.180 0 0 0 0.484 8.70 4.85 2.53 2.23 1.42 24.3 3.78
1913 41.4 32.7 14.0 10.4 8.79 7.03 656.9 112.1 26.9 12.8 8.47 9.53 77.9
1914 21.3 24.8 15.6 5.00 1.00 3.00 146.3 131.7 175.5 69.3 29.3 50.6 56.1
1915 91.5 84.4 62.6 42.0 33.0 59.0 293.0 246.6 550.3 544.9 88.0 32.4 177.8
1916 46.4 43.7 8.58 1.65 0.586 1.81 2,060 1,017 244.8 103.6 245.8 372.3 343.7
1917 160.4 109.0 12.7 5.00 3.00 4.29 831.1 122.4 32.8 19.0 2.03 3.55 108.1
1920 -- -- -- -- -- -- 944.8 147.1 365.8 36.4 5.15 0.867 --
1921 6.76 1.10 0.200 0.200 0.200 0.300 441.7 48.8 121.2 22.0 8.35 15.0 55.0
1923 8.39 5.83 1.00 0.800 0.600 0.700 346.7 221.1 15.5 9.84 1.68 1.09 51.1
1924 1.71 2.80 1.50 1.00 0.700 2.00 49.3 25.0 19.0 15.1 2.62 0.113 10.0
1929 42.5 7.93 5.00 2.00 1.00 516.1 370.8 96.5 24.7 2.27 0.090 0 89.7
1930 0 0 0 0 0 0 149.3 164.8 25.8 3.32 0.045 0 28.7
1931 0 0 0 0 0 4.68 16.5 5.40 4.17 0.826 0.100 0 2.64
1932 0 0 0 0 0 0.265 342.5 25.3 0.527 0 0 0.253 30.3
1933 0.510 0.200 0 0 0 3.94 138.0 19.7 26.1 0.706 0 0 15.6
1934 0 0 0 0 0 0.145 47.6 4.63 0.460 1.53 0 0 4.48
1935 0 0 0 0 0 29.5 112.2 16.8 2.74 8.98 1.77 0.427 14.3
1936 0 0 0 0 0 0 278.8 58.3 2.55 0 0 0 28.0
1937 0 0 0 0 0 0 65.9 106.8 76.1 190.9 635.2 384.2 122.5
1938 61.1 11.1 8.31 4.58 6.00 131.3 129.6 926.1 624.3 131.7 0.219 0 170.6
1939 0 0 0 0 0 0.142 12.1 2.43 0.600 0.194 0 0 1.28
1940 0 0 0 0 0 0 129.0 21.0 0.977 0.010 0 0 12.4
1941 0 0 0 0 0 0 288.9 131.1 490.5 183.5 2.41 18.6 92.5
1942 165.1 5.53 3.00 0.323 0 139.5 944.3 904.9 208.3 21.1 55.6 70.1 210.5
1943 4.94 1.43 0.006 0 0 19.8 502.9 324.5 763.6 380.0 32.5 28.9 171.3
1944 4.80 0.280 0.035 0 0 0 72.3 32.8 414.8 256.8 129.4 196.6 92.0
1945 37.4 248.8 205.7 0.674 2.74 390.5 1,156 570.0 95.0 39.0 13.1 22.8 232.1
1946 8.79 4.02 5.98 0.277 0.146 269.6 804.2 226.5 16.2 9.67 0 0.873 112.1
1947 0.223 0.063 0.023 0.042 0.011 0.197 161.2 217.1 1,049 561.3 49.6 3.57 170.1
1948 8.78 55.5 74.9 1.91 0.655 19.5 993.0 978.2 35.7 62.7 94.1 108.0 202.8
1949 0.103 0.320 0.113 0.100 0.100 0.110 356.0 210.9 326.2 75.4 523.9 283.4 148.2
1950 43.8 78.0 58.2 26.9 7.63 0.758 740.4 4,274 1,279 616.5 35.2 24.5 604.3
1951 141.6 4.37 0.858 0.545 8.08 71.2 955.7 941.6 110.0 11.5 5.92 48.8 192.2
1952 6.14 5.92 4.52 0.184 0.017 0.852 560.0 111.4 24.9 75.4 25.0 0.050 67.4
1953 0 0 0 0 0 39.0 75.9 157.4 208.7 48.7 0.448 2.51 44.5
1954 2.53 3.01 0.326 0.081 0.011 0.181 160.1 367.0 213.7 18.2 1.69 1.39 64.2
1955 0.190 0.593 0.145 0 0 0 255.9 91.1 373.8 42.6 5.24 0 63.6
1956 0 0.350 0.097 0 0 2.05 618.8 896.2 275.4 583.8 49.6 666.0 257.6
1957 60.2 226.2 152.7 0.939 0 169.5 605.2 606.6 498.4 639.5 150.0 647.2 313.6
1958 535.9 257.9 41.7 33.6 21.3 11.0 34.6 50.7 30.8 452.9 7.01 0.003 124.4
1959 0.126 1.34 0.187 0 0 26.9 513.9 285.7 65.8 116.9 30.2 24.0 88.8
1960 7.66 5.02 0.900 0.155 0 0.681 651.1 355.8 149.0 89.6 5.58 1.52 105.1
1961 0.619 2.12 0.081 0 0 54.5 59.3 73.2 2.60 0.110 0.097 14.8 17.4
1962 8.31 2.23 0.294 0 0 0.045 597.8 1,017 1,774 721.4 368.9 181.4 389.8
1963 16.2 9.08 4.01 0.123 0.229 68.1 974.5 575.4 423.5 100.2 16.0 1.18 182.0
1964 0.168 0.047 0 0 0 0 200.5 337.1 1,207 706.2 523.5 179.6 262.8
1965 512.7 188.7 13.6 1.57 0.171 1.00 1,818 1,405 1,055 430.9 37.1 96.8 463.6
1966 510.9 335.4 95.8 40.8 10.1 184.5 2,827 1,874 638.1 271.2 326.5 161.9 607.1
1967 14.8 31.6 12.1 1.32 1.43 55.9 1,779 1,751 509.8 212.3 20.7 1.75 366.6
1968 28.3 55.8 5.02 0.023 0.062 101.1 36.3 22.9 762.9 1,016 709.0 441.6 265.7
1969 214.0 253.3 102.5 42.6 32.0 17.0 1,678 1,141 158.2 9.33 1.80 0.735 304.1
1970 156.8 79.1 0.392 0.057 0 0 655.4 784.5 1,375 404.5 2.72 3.93 288.3
1971 98.9 56.7 1.28 1.22 0.964 7.66 408.8 125.6 34.7 12.1 1.06 8.73 62.9
1972 469.1 844.3 16.7 2.71 1.74 163.7 1,141 473.5 86.3 10.5 5.07 2.38 266.8
1973 61.8 3.82 0.062 0.008 0.001 125.5 26.4 32.6 11.2 0.819 4.93 177.8 37.2
1974 407.3 173.4 4.65 0.127 0.020 0.688 1,340 1,642 623.6 45.6 132.5 61.6 370.3
1975 36.7 154.4 3.28 2.51 2.39 19.2 1,131 1,291 331.4 2,103 71.8 103.0 441.1
1976 110.7 33.4 48.0 0.521 0.249 46.8 556.4 37.8 50.1 2.31 4.64 1.38 73.8
1977 1.18 0.101 0.005 0 0 0.685 28.2 34.0 8.87 1.69 0.017 8.91 6.98
1978 18.3 8.25 14.4 28.5 33.9 12.2 1,646 624.1 151.8 92.8 43.7 69.5 227.6
1979 160.5 26.4 5.60 4.51 9.92 9.66 1,231 1,788 655.7 129.7 12.7 11.3 338.2
1980 91.5 57.9 12.3 0.454 0 0.033 617.2 63.4 0.032 0 0 14.0 70.7
1981 4.16 5.05 0.681 0.014 1.63 16.9 7.75 6.13 83.2 105.4 3.38 14.6 20.8
1982 -- -- -- -- -- 16.8 930.8 829.8 165.8 185.6 149.3 8.90 --
1983 369.2 314.3 102.6 21.4 2.47 608.5 655.6 358.2 443.9 576.6 195.6 187.8 321.4
1984 296.3 150.8 59.7 18.4 21.3 88.5 537.1 211.2 468.8 243.1 46.9 8.66 178.9
1985 75.7 57.2 2.28 0 0 315.0 750.4 748.9 1,003 1,136 841.7 943.0 491.3
1986 636.6 213.0 46.2 7.74 2.96 319.7 1,367 1,248 248.5 28.4 9.66 122.3 355.6
1987 3.52 2.13 0.354 0.005 0 316.7 112.9 325.7 69.8 109.3 52.3 5.45 84.3
1988 2.78 1.55 0.739 0.162 0.027 9.94 244.9 18.9 31.6 0.444 0.115 13.0 26.7
1989 1.26 1.89 0.245 0.196 0.176 1.17 726.9 227.9 161.0 85.0 10.4 0.122 100.9
1990 0 0 0.021 0 0 22.3 14.5 1.83 11.9 2.79 0.008 0 4.46
1991 0 41.3 0.789 0 0 13.7 10.2 21.7 3.95 21.2 0.980 6.06 10.0
1992 3.98 5.51 2.81 2.55 2.89 116.4 636.6 412.0 57.8 61.0 33.7 389.6 143.1
1993 161.1 18.3 5.05 1.64 0.996 71.9 639.7 89.8 171.0 710.7 1,012 1,012 325.7
1994 232.8 136.5 10.7 4.44 0.023 138.3 90.4 94.0 77.9 913.8 136.8 239.9 174.8
1995 151.4 358.4 93.5 11.5 0.573 772.9 656.2 372.3 66.4 148.1 102.8 82.4 236.0
1996 104.2 46.4 18.9 3.36 1.54 57.4 1,070 2,114 1,176 690.4 360.2 31.2 474.2
1997 68.0 148.9 43.5 11.9 2.26 38.6 1,924 1,979 774.3 921.4 111.0 8.91 504.5
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