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Last update: Tuesday, 24-Aug-2004 12:38:24 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 644 1995 0 m 75.6 93.4 1.24 2.96
November 486 1995 0 m 49.0 65.0 1.33 1.92
December 261 1995 0 m 23.2 35.4 1.53 0.91
January 120 1995 0 m 12.0 17.5 1.46 0.47
February 65.8 1995 0 m 8.39 11.5 1.37 0.33
March 1,220 1995 0 m 99.8 192 1.92 3.90
April 4,410 1997 24.7 1939 874 944 1.08 34.1
May 4,770 1997 11.8 1939 717 962 1.34 28.0
June 1,780 1974 6.56 1940 329 355 1.08 12.8
July 1,510 1997 0 1940 182 229 1.26 7.10
August 946 1993 0 1939 111 172 1.55 4.34
September 648 1993 0 m 79.8 106 1.33 3.12
Annual 1,120 1995 3.96 1939 215 218 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 8.10 46.2 24.7 6.66 0.49 0 0.05 0.54 0 0
90 0.02 0 0 25.9 68.8 42.1 13.6 3.27 0.49 1.20 3.00 0.49 0.72
85 0.26 0 0.07 68.2 95.4 58.5 20.8 6.52 2.30 5.69 5.27 1.80 3.01
80 0.86 0.17 0.72 104 120 77.9 29.8 9.53 6.12 10.9 8.20 2.30 5.21
75 1.60 0.70 1.60 139 144 97.5 39.9 14.2 10.2 16.7 12.1 4.18 7.83
70 2.10 1.60 2.87 174 171 116 50.4 20.5 14.7 24.1 14.8 5.18 11.4
65 3.39 1.60 3.72 206 190 135 61.7 26.9 20.1 29.6 17.4 6.66 16.6
60 4.17 2.20 4.35 238 209 154 72.0 32.8 27.6 36.1 22.1 8.83 21.9
55 4.75 2.90 6.26 282 245 173 82.8 41.0 36.9 42.9 28.1 11.2 31.1
50 5.88 4.06 8.23 329 297 201 97.8 52.0 46.8 49.8 31.9 13.6 41.8
45 7.69 4.51 10.4 403 369 230 113 63.9 55.4 56.7 35.9 16.2 54.4
40 8.76 5.45 13.6 496 450 266 130 75.9 62.4 63.5 40.4 18.8 72.1
35 10.6 7.27 16.8 622 550 304 151 91.4 69.5 75.3 44.9 21.2 95.2
30 12.2 8.67 25.0 775 688 353 187 108 84.6 87.5 53.9 23.6 122
25 15.1 10.9 34.2 1,010 846 405 225 130 103 102 64.5 27.6 163
20 17.7 13.2 47.9 1,330 1,020 487 265 159 124 119 76.9 31.8 219
15 21.4 15.8 116 1,750 1,360 594 324 200 158 138 91.1 39.0 302
10 30.3 20.1 208 2,360 1,960 744 425 250 209 174 110 50.3 496
5 43.8 33.7 507 3,670 2,850 1,160 647 430 289 240 156 87.0 987
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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 70.8 59.8 51.0 40.8
0.95 1.05 265 174 148 121 96.6
0.90 1.11 396 276 235 190 151
0.80 1.25 638 476 406 324 258
0.50 2 1,560 1,290 1,100 867 695
0.20 5 3,720 3,270 2,820 2,230 1,800
0.10 10 5,790 5,210 4,490 3,580 2,910
0.04 25 9,210 8,390 7,260 5,880 4,810
0.02 50 12,400 11,300 9,800 8,040 6,620
0.01 100 16,100 14,700 12,800 10,600 8,780
0.005 200 20,500 18,600 16,200 13,600 11,300
0.002 500 27,200 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
1904 May 2 20.90 4,300 1953 June 10 6.74 250
1905 April 5 9.80 1,370 1954 July 7 7.97 846
1906 April 4 9.00 800 1955 April 5 20.11 2,700
1907 May 14 13.60 2,190 1956 April 27 20.90 5,200
1908 April 10 7.70 927 1957 March 27 7.63 661
1910 March 15 6.50 685 1958 April 7 7.17 442
1911 March 23 8.90 900 1959 April 5 14.40 1,800
1912 July 29 8.50 1,000 1960 April 14 21.00 4,040
1913 April 7 21.50 3,870 1961 April 3 9.49 372
1914 April 18 4.80 388 1962 April 21 20.97 3,650
1915 April 7 6.20 180 1963 July 28 10.55 1,150
1919 April 15 15.10 2,430 1964 April 17 10.07 1,080
1920 April 19 7.10 361 1965 April 13 19.21 3,600
1921 April 13 7.40 733 1966 April 3 21.20 4,300
1922 April 7 -- 1,300 1967 April 23 16.83 2,900
1923 April 20 17.80 3,120 1968 March 28 9.34 734
1924 April 20 6.70 674 1969 April 21 21.32 7,360
1925 March 28 18.30 2,350 1970 April 27 21.47 7,070
1926 July 6 5.00 318 1971 April 12 22.22 7,350
1927 May 12 17.80 3,110 1972 April 16 15.87 2,550
1928 March 25 -- 1,270 1973 March 27 8.27 224
1929 March 21 9.00 750 1974 April 28 22.92 10,300
1930 April 8 19.00 2,900 1975 May 18 11.03 1,500
1931 April 9 13.00 1,580 1976 April 19 19.87 4,430
1932 April 9 13.60 1,240 1977 May 21 9.26 261
1933 May 26 -- 1,180 1978 April 11 19.31 3,800
1934 April 9 9.76 780 1979 April 20 23.64 9,500
1935 June 18 5.38 364 1980 April 7 8.85 435
1936 April 15 17.34 2,530 1981 April 1 9.28 285
1937 June 8 4.32 237 1982 June 8 11.68 1,520
1938 March 20 8.11 730 1983 April 9 11.86 1,630
1939 April 4 6.30 52.0 1984 April 7 9.35 312
1940 April 20 7.97 816 1985 March 20 13.97 1,750
1941 April 14 18.23 2,830 1986 March 24 14.83 2,390
1942 April 7 19.96 3,550 1987 April 7 21.41 5,510
1943 March 27 12.82 1,400 1988 April 6 8.74 420
1944 August 6 -- 1,200 1989 April 17 10.08 1,000
1945 March 29 16.54 2,440 1990 April 3 10.50 1,000
1946 March 24 16.27 2,070 1991 June 16 10.22 888
1947 April 11 10.19 1,320 1992 April 1 19.59 3,900
1948 April 21 20.36 3,770 1993 July 30 18.10 3,580
1949 April 22 20.83 5,010 1994 April 2 13.24 2,040
1950 April 20 21.58 10,700 1995 April 23 23.30 8,500
1951 April 7 14.95 2,000 1996 April 18 -- 7,500
1952 April 3 8.18 550 1997 April 26 24.20 15,100
Annual peak discharge, from highest to lowest, and corresponding gage height
1997 April 26 24.20 15,100 1975 May 18 11.03 1,500
1950 April 20 21.58 10,700 1943 March 27 12.82 1,400
1974 April 28 22.92 10,300 1905 April 5 9.80 1,370
1979 April 20 23.64 9,500 1947 April 11 10.19 1,320
1995 April 23 23.30 8,500 1922 April 7 -- 1,300
1996 April 18 -- 7,500 1928 March 25 -- 1,270
1969 April 21 21.32 7,360 1932 April 9 13.60 1,240
1971 April 12 22.22 7,350 1944 August 6 -- 1,200
1970 April 27 21.47 7,070 1933 May 26 -- 1,180
1987 April 7 21.41 5,510 1963 July 28 10.55 1,150
1956 April 27 20.90 5,200 1964 April 17 10.07 1,080
1949 April 22 20.83 5,010 1912 July 29 8.50 1,000
1976 April 19 19.87 4,430 1989 April 17 10.08 1,000
1904 May 2 20.90 4,300 1990 April 3 10.50 1,000
1966 April 3 21.20 4,300 1908 April 10 7.70 927
1960 April 14 21.00 4,040 1911 March 23 8.90 900
1992 April 1 19.59 3,900 1991 June 16 10.22 888
1913 April 7 21.50 3,870 1954 July 7 7.97 846
1978 April 11 19.31 3,800 1940 April 20 7.97 816
1948 April 21 20.36 3,770 1906 April 4 9.00 800
1962 April 21 20.97 3,650 1934 April 9 9.76 780
1965 April 13 19.21 3,600 1929 March 21 9.00 750
1993 July 30 18.10 3,580 1968 March 28 9.34 734
1942 April 7 19.96 3,550 1921 April 13 7.40 733
1923 April 20 17.80 3,120 1938 March 20 8.11 730
1927 May 12 17.80 3,110 1910 March 15 6.50 685
1930 April 8 19.00 2,900 1924 April 20 6.70 674
1967 April 23 16.83 2,900 1957 March 27 7.63 661
1941 April 14 18.23 2,830 1952 April 3 8.18 550
1955 April 5 20.11 2,700 1958 April 7 7.17 442
1972 April 16 15.87 2,550 1980 April 7 8.85 435
1936 April 15 17.34 2,530 1988 April 6 8.74 420
1945 March 29 16.54 2,440 1914 April 18 4.80 388
1919 April 15 15.10 2,430 1961 April 3 9.49 372
1986 March 24 14.83 2,390 1935 June 18 5.38 364
1925 March 28 18.30 2,350 1920 April 19 7.10 361
1907 May 14 13.60 2,190 1926 July 6 5.00 318
1946 March 24 16.27 2,070 1984 April 7 9.35 312
1994 April 2 13.24 2,040 1981 April 1 9.28 285
1951 April 7 14.95 2,000 1977 May 21 9.26 261
1959 April 5 14.40 1,800 1953 June 10 6.74 250
1985 March 20 13.97 1,750 1937 June 8 4.32 237
1983 April 9 11.86 1,630 1973 March 27 8.27 224
1931 April 9 13.00 1,580 1915 April 7 6.20 180
1982 June 8 11.68 1,520 1939 April 4 6.30 52.0
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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
__________________________________________________________________________________________________________________________________
1903 -- -- -- -- -- -- -- 201.7 149.0 60.3 33.0 33.0 --
1904 40.0 30.0 15.0 8.00 4.00 2.00 1,490 2,640 1,693 838.8 384.8 301.7 621.1
1905 235.0 170.0 130.0 59.0 20.0 200.0 480.0 447.4 485.3 206.1 97.0 93.9 219.3
1906 118.8 80.0 20.0 10.0 5.00 2.00 408.0 192.5 271.4 175.1 130.8 147.2 130.0
1907 143.9 97.0 15.0 5.00 2.00 3.00 170.0 1,601 507.2 155.8 54.3 34.8 234.7
1908 55.2 38.0 19.0 6.00 3.00 3.00 328.0 473.9 223.9 87.8 52.1 60.9 112.6
1909 -- -- -- -- -- -- -- -- 329.0 129.0 48.3 27.7 --
1910 45.9 35.0 5.00 3.00 2.00 211.0 165.5 119.8 60.4 34.9 6.87 3.93 58.1
1911 6.39 3.00 2.00 1.00 0.500 198.0 293.7 230.6 153.9 49.2 24.1 5.73 81.0
1912 19.6 15.0 10.0 5.00 2.00 7.00 158.2 174.2 148.3 129.1 85.5 180.7 77.8
1913 191.1 120.0 50.0 20.0 10.0 5.00 1,674 529.5 191.1 106.5 69.5 61.8 251.5
1914 63.6 50.0 20.0 10.0 10.0 50.0 271.7 220.1 134.5 48.4 13.4 12.9 75.5
1915 31.7 21.1 9.00 6.00 5.00 9.00 45.7 25.3 24.6 20.3 8.74 7.77 17.9
1919 -- -- -- -- -- -- 820.8 376.9 164.0 87.0 29.7 34.4 --
1920 88.5 65.0 30.0 20.0 15.0 28.0 178.5 228.2 148.6 76.7 17.6 18.3 76.2
1921 126.6 95.0 60.0 30.0 20.0 20.0 358.1 168.6 96.6 113.1 18.8 16.2 93.7
1922 106.2 53.6 30.0 8.00 4.50 40.9 449.8 242.9 139.5 26.5 9.35 38.5 95.7
1923 68.0 73.9 33.0 20.0 10.0 11.0 1,145 1,130 315.0 86.3 89.2 104.3 257.5
1924 113.9 90.3 23.0 4.00 3.00 7.00 219.5 156.5 98.5 54.0 14.4 20.5 67.0
1925 169.1 105.5 20.0 2.00 2.00 384.8 420.2 196.6 252.9 113.5 19.0 55.1 145.6
1926 143.1 67.0 25.0 12.0 3.00 58.5 145.2 100.5 96.0 93.0 13.3 47.6 67.3
1927 58.5 43.0 31.0 15.0 4.00 281.2 1,046 1,160 569.7 302.9 189.7 272.5 332.2
1928 230.0 123.2 50.0 40.0 25.0 322.5 357.2 208.6 180.8 152.0 59.4 71.6 152.0
1929 121.5 44.8 22.4 12.0 8.00 183.5 219.7 109.9 79.4 6.21 3.85 4.77 68.3
1930 19.0 45.8 8.00 2.00 1.00 1.00 928.0 458.0 215.8 85.7 15.9 11.9 148.9
1931 25.8 11.2 2.70 7.20 6.60 45.2 462.9 102.7 22.3 10.8 2.07 0.390 58.0
1932 0.635 4.92 1.04 0.132 3.45 14.1 422.9 185.7 71.2 21.1 6.10 1.84 60.7
1933 7.53 8.02 2.71 0 0 17.9 720.7 554.5 319.8 74.5 27.2 28.9 146.7
1934 47.2 24.1 9.60 4.74 4.81 75.2 343.3 153.5 67.7 19.9 1.37 0.100 62.6
1935 1.68 1.07 0.084 0 0 12.6 144.1 64.2 108.2 62.4 23.5 14.9 36.0
1936 14.0 5.01 2.19 0.568 0.038 0 681.3 428.4 196.5 57.0 20.7 25.3 118.7
1937 14.1 7.08 3.53 0.555 0 0 112.1 74.8 65.5 14.3 12.5 0.403 25.4
1938 0.813 0.363 0.168 0 0 179.4 101.0 78.3 36.6 12.5 0.052 0 34.4
1939 0 0 0 0 0 0 24.7 11.8 10.8 0.603 0 0 3.96
1940 0 0 0 0 0 0 94.0 35.5 6.56 0 7.06 0 11.8
1941 0 0 0 0 0 0 995.8 384.5 174.5 61.7 28.1 134.6 147.5
1942 121.8 51.8 26.3 3.53 1.09 45.7 1,900 977.1 365.0 129.2 100.1 68.4 315.4
1943 50.6 33.9 9.51 6.51 5.45 155.1 500.6 301.9 314.7 226.5 206.9 180.9 166.4
1944 122.9 72.0 39.7 7.37 3.65 3.74 273.9 203.7 255.2 563.8 810.9 463.0 235.9
1945 203.2 233.7 105.0 42.9 49.5 740.8 1,080 759.4 439.3 257.0 142.4 96.4 346.9
1946 66.8 35.6 21.7 8.98 8.96 568.4 674.0 290.2 113.4 67.5 32.0 20.3 159.7
1947 29.5 22.8 7.39 1.76 1.20 1.03 609.0 291.9 199.8 87.9 122.4 65.0 119.8
1948 53.5 28.1 15.4 14.1 5.48 5.03 930.2 888.5 412.9 312.0 197.0 117.2 248.3
1949 66.6 45.7 20.6 12.8 12.0 11.5 2,428 1,569 656.9 272.5 142.4 69.1 441.9
1950 56.6 41.7 17.8 8.81 7.04 9.58 1,804 2,887 1,211 598.4 408.3 222.5 608.7
1951 151.8 87.8 37.4 31.5 25.0 38.4 844.5 512.7 265.6 120.2 67.3 48.6 185.8
1952 28.9 15.7 7.29 1.29 1.00 1.28 283.5 204.4 123.0 70.5 20.6 4.52 63.4
1953 3.58 6.05 1.36 0.216 0.100 0.926 71.1 46.5 157.6 90.8 64.0 14.7 38.1
1954 8.82 9.57 3.65 1.06 0.318 9.25 94.6 80.6 389.8 686.6 401.2 205.7 158.7
1955 143.9 76.5 28.0 10.5 16.1 13.6 1,511 854.5 579.3 303.6 109.1 57.0 308.3
1956 53.3 25.0 14.5 8.84 8.55 12.1 1,180 2,264 881.2 377.2 182.5 139.7 429.8
1957 100.0 63.2 20.0 15.7 7.68 118.4 275.4 202.1 134.9 63.9 77.6 116.5 99.8
1958 165.2 86.7 61.5 35.1 21.1 24.2 205.5 125.5 38.8 31.9 5.19 2.31 67.1
1959 5.34 3.82 0.326 0.145 0.100 0.748 500.3 166.4 140.0 39.8 18.0 10.8 73.4
1960 31.9 61.7 100.3 66.0 39.7 23.0 1,833 1,252 480.5 203.3 94.3 44.0 351.4
1961 26.6 19.4 5.28 4.36 1.96 49.1 268.4 182.6 56.7 13.6 2.42 3.64 52.9
1962 4.23 3.09 0.958 0.403 0.132 1.03 672.8 377.5 296.5 114.6 83.1 99.8 137.6
1963 62.2 31.5 22.1 18.4 1.67 91.1 196.7 192.0 268.5 171.9 127.1 74.3 105.2
1964 45.4 22.0 6.60 3.29 3.22 2.74 328.8 328.5 203.4 73.1 49.6 57.3 93.5
1965 43.9 22.7 6.98 4.41 3.72 2.76 862.6 701.7 453.5 181.6 74.7 94.5 204.4
1966 85.0 51.0 34.1 21.5 16.4 139.1 1,547 964.9 389.5 241.8 113.3 44.7 304.2
1967 25.9 15.8 7.27 8.10 8.40 26.6 921.7 1,010 317.9 105.1 38.4 13.3 208.6
1968 22.1 19.2 6.26 2.60 1.80 155.8 204.9 143.6 70.0 43.7 138.4 342.8 95.7
1969 377.8 191.1 56.4 23.3 17.0 23.5 3,146 1,805 621.5 364.1 183.5 121.2 577.3
1970 80.8 58.4 29.3 17.4 15.2 11.8 1,613 2,313 1,465 809.9 322.4 180.1 578.2
1971 118.4 77.5 24.4 14.6 13.8 16.1 2,398 1,517 581.0 343.7 266.2 157.3 460.6
1972 104.6 69.9 34.5 17.3 10.9 395.6 1,330 891.7 356.6 198.9 178.0 110.8 308.2
1973 74.9 35.2 8.47 2.81 2.70 90.7 101.3 71.0 51.3 63.5 61.6 62.0 52.4
1974 60.8 38.5 20.8 10.6 6.20 11.7 3,028 4,618 1,777 529.9 149.6 99.0 865.4
1975 64.8 38.8 21.6 11.9 7.29 8.21 361.8 1,221 664.7 264.1 100.8 50.1 236.0
1976 44.0 28.2 12.0 13.2 15.0 30.7 2,766 1,450 502.5 251.7 85.2 41.2 434.6
1977 28.0 14.7 2.53 2.19 2.30 15.3 69.2 80.0 49.0 18.9 5.74 25.5 26.2
1978 29.1 10.9 6.01 3.01 0.429 0.063 1,170 519.0 194.6 68.1 46.8 49.8 174.3
1979 24.9 11.7 5.06 3.74 3.27 4.76 1,991 3,284 867.0 288.5 80.4 62.0 554.7
1980 45.8 27.5 13.2 6.45 5.03 5.83 205.0 84.3 36.6 11.2 11.5 12.9 38.6
1981 21.0 24.9 5.81 1.37 25.1 112.2 220.7 137.2 65.7 28.2 14.1 6.27 55.2
1982 13.9 11.1 3.65 0.989 0.019 33.4 605.2 644.5 520.8 261.5 133.8 61.2 191.2
1983 81.3 28.8 20.7 12.8 5.42 172.3 917.7 456.2 274.6 73.1 22.9 12.6 173.1
1984 24.4 19.0 2.39 0.534 0 25.6 148.1 164.0 138.3 32.9 6.99 2.31 47.0
1985 7.24 4.45 2.26 0.065 0 494.5 832.0 264.6 136.6 136.3 81.4 45.1 167.5
1986 56.5 42.1 17.8 15.2 8.41 571.4 927.2 771.6 382.5 179.2 133.4 65.4 265.4
1987 49.5 17.4 12.2 13.6 17.3 48.5 1,997 878.4 264.3 113.8 61.7 64.8 294.0
1988 65.8 36.1 18.3 4.23 2.17 44.4 145.9 53.9 16.5 3.27 0.439 0.101 32.6
1989 0.400 2.67 3.06 0.182 0 0 177.8 102.8 56.2 12.9 0.588 0 29.6
1990 0 4.25 0.003 0 0 0.823 316.1 122.3 185.1 60.0 6.16 0.194 57.6
1991 0.043 1.15 0.095 0.019 0 9.25 74.9 73.5 148.1 260.3 99.2 17.5 57.4
1992 12.1 11.2 8.48 8.17 8.06 438.1 2,554 889.2 230.7 90.4 29.0 11.9 355.8
1993 9.13 12.9 7.35 4.74 3.46 31.7 540.2 293.2 206.5 648.7 946.3 648.4 280.9
1994 319.0 187.6 105.1 46.6 36.2 395.4 1,146 543.6 234.3 176.8 114.8 187.1 291.5
1995 643.5 486.1 260.6 120.0 65.8 1,216 4,382 3,183 1,291 478.9 881.8 345.7 1,116
1996 155.9 79.5 45.5 23.1 13.1 14.6 3,164 2,784 917.1 419.0 308.1 184.0 674.7
1997 131.2 77.7 40.2 39.5 37.1 38.9 4,412 4,770 968.9 1,509 431.8 164.0 1,056
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