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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 1,350 1972 10.0 1935 188 218 1.16 4.80
November 1,230 1972 19.0 1935 139 153 1.10 3.55
December 260 1910 21.4 1937 88.6 50.4 0.57 2.26
January 220 1910 21.4 1940 71.2 37.2 0.52 1.82
February 150 1984 19.1 1937 65.7 31.9 0.49 1.68
March 1,140 1995 13.6 1937 236 269 1.14 6.01
April 3,510 1997 61.0 1981 1,180 936 0.79 30.1
May 5,060 1950 32.2 1977 684 727 1.06 17.4
June 3,040 1962 26.5 1980 484 503 1.04 12.3
July 2,390 1997 8.34 1936 399 450 1.13 10.2
August 1,690 1985 1.49 1936 206 273 1.32 5.26
September 1,270 1973 2.92 1936 179 192 1.08 4.56
Annual 855 1950 64.4 1939 324 183 0.56 100
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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 28.1 25.2 25.5 76.5 78.1 48.0 28.0 22.5 19.3 25.9 31.0 25.8 28.1
90 32.5 31.3 33.5 123 118 65.3 46.2 33.5 30.2 36.9 40.5 38.1 37.7
85 37.4 34.8 39.4 160 146 82.3 61.2 41.8 38.2 45.5 47.5 43.2 44.5
80 40.4 37.2 44.2 195 174 98.7 73.9 51.1 45.8 52.6 53.2 47.4 51.3
75 43.0 40.0 49.0 247 202 118 87.5 60.0 55.1 59.0 61.2 51.4 60.1
70 46.8 43.5 54.1 320 233 143 101 68.6 64.6 67.8 68.9 55.1 69.1
65 49.7 46.8 59.4 392 272 165 118 77.2 74.3 77.3 76.1 58.7 78.5
60 52.3 50.0 65.4 463 313 189 135 86.8 84.2 85.3 83.5 63.5 88.2
55 59.7 54.9 72.9 540 351 218 156 96.6 94.6 93.4 91.1 70.1 97.8
50 64.6 60.8 81.1 652 404 250 178 106 105 105 100 78.1 111
45 70.5 66.2 90.7 776 462 286 216 120 116 117 111 84.6 128
40 76.0 70.5 101 925 523 330 256 137 130 131 123 90.2 145
35 80.5 75.0 112 1,120 616 388 300 153 143 146 135 97.5 177
30 84.9 79.9 124 1,340 713 471 361 178 163 176 149 106 212
25 89.3 86.6 148 1,560 841 564 440 203 190 215 165 114 274
20 95.5 95.6 185 1,850 1,000 678 550 246 232 259 186 123 370
15 104 102 308 2,250 1,190 831 721 310 304 325 212 134 523
10 119 116 621 2,920 1,480 1,070 989 444 433 423 258 152 789
5 146 130 1,270 4,260 2,150 1,680 1,520 810 630 626 337 193 1,390
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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 1.01 484 417 364 273 197
0.95 1.05 874 724 623 478 353
0.90 1.11 1,180 966 825 640 476
0.80 1.25 1,680 1,360 1,150 903 676
0.50 2 3,180 2,570 2,160 1,700 1,280
0.20 5 5,710 4,730 3,960 3,120 2,330
0.10 10 7,610 6,450 5,390 4,220 3,140
0.04 25 10,200 8,910 7,460 5,780 4,260
0.02 50 12,200 10,900 9,170 7,050 5,150
0.01 100 14,300 13,100 11,000 8,390 6,090
0.005 200 16,500 15,500 13,000 9,830 7,070
0.002 500 19,400 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
1910 March 22 9.50 1,960 1962 June 10 10.96 8,600
1911 June 9 7.92 793 1963 July 13 6.15 2,300
1912 September 29 -- 1,110 1964 April 17 6.58 3,050
1913 April 8 -- 3,320 1965 April 13 10.86 8,680
1914 June 12 4.70 1,340 1966 April 3 11.02 8,920
1915 June 29 6.91 3,320 1967 March 31 9.32 5,820
1916 April 15 -- 3,990 1968 July 18 7.30 3,550
1917 April 11 -- 1,250 1969 April 12 11.82 9,740
1919 -- -- 6,700 1970 April 26 9.32 5,630
1935 March 27 5.02 696 1971 April 10 7.58 3,500
1936 April 17 -- 1,260 1972 April 16 9.95 6,720
1937 May 1 -- 1,010 1973 March 15 7.42 2,900
1938 May 14 5.95 2,220 1974 April 22 10.08 6,920
1939 April 20 3.80 830 1975 April 19 10.34 7,310
1940 April 15 11.43 3,100 1976 April 3 6.84 3,120
1941 June 8 -- 3,290 1977 July 5 4.13 866
1942 March 27 10.04 2,200 1978 April 9 11.56 9,890
1943 April 7 -- 2,780 1979 April 25 12.38 10,300
1944 August 10 7.42 3,210 1980 April 8 5.59 1,910
1945 March 27 -- 2,680 1981 September 8 6.97 3,160
1946 March 22 -- 3,380 1982 April 15 7.76 4,160
1947 April 15 -- 5,430 1983 June 13 7.05 3,190
1948 April 7 -- 3,000 1984 June 9 8.85 5,450
1949 June 2 7.30 3,360 1985 August 19 9.86 7,120
1950 May 6 11.28 9,310 1986 April 30 7.39 3,720
1951 April 10 6.52 2,880 1987 May 27 5.93 2,170
1952 April 16 6.17 2,550 1988 April 7 6.05 2,270
1953 July 5 4.44 1,120 1989 April 7 7.62 2,550
1954 April 14 6.16 2,540 1990 June 22 3.77 652
1955 April 8 7.25 3,660 1991 September 16 4.45 1,040
1956 April 21 8.67 5,560 1992 August 25 -- 1,640
1957 June 28 9.98 6,840 1993 March 30 9.88 3,200
1958 July 7 4.65 1,320 1994 July 8 8.99 5,350
1959 April 4 6.30 1,960 1995 March 30 13.25 3,110
1960 April 6 8.47 4,010 1996 April 19 12.24 9,400
1961 April 26 3.97 884 1997 April 15 11.10 7,860
Annual peak discharge, from highest to lowest, and corresponding gage height
1979 April 25 12.38 10,300 1965 April 13 10.86 8,680
1978 April 9 11.56 9,890 1962 June 10 10.96 8,600
1969 April 12 11.82 9,740 1997 April 15 11.10 7,860
1996 April 19 12.24 9,400 1975 April 19 10.34 7,310
1950 May 6 11.28 9,310 1985 August 19 9.86 7,120
1966 April 3 11.02 8,920 1974 April 22 10.08 6,920
1957 June 28 9.98 6,840 1973 March 15 7.42 2,900
1919 -- 6,700 1951 April 10 6.52 2,880
1967 March 31 9.32 5,820 1943 April 7 -- 2,780
1970 April 26 9.32 5,630 1945 March 27 -- 2,680
1956 April 21 8.67 5,560 1952 April 16 6.17 2,550
1984 June 9 8.85 5,450 1989 April 7 7.62 2,550
1947 April 15 -- 5,430 1954 April 14 6.16 2,540
1994 July 8 8.99 5,350 1963 July 13 6.15 2,300
1982 April 15 7.76 4,160 1988 April 7 6.05 2,270
1960 April 6 8.47 4,010 1938 May 14 5.95 2,220
1916 April 15 -- 3,990 1942 March 27 10.04 2,200
1986 April 30 7.39 3,720 1987 May 27 5.93 2,170
1955 April 8 7.25 3,660 1910 March 22 9.50 1,960
1968 July 18 7.30 3,550 1959 April 4 6.30 1,960
1971 April 10 7.58 3,500 1992 August 25 -- 1,640
1946 March 22 -- 3,380 1914 June 12 4.70 1,340
1949 June 2 7.30 3,360 1958 July 7 4.65 1,320
1913 April 8 -- 3,320 1936 April 17 -- 1,260
1915 June 29 6.91 3,320 1917 April 11 -- 1,250
1941 June 8 -- 3,290 1953 July 5 4.44 1,120
1944 August 10 7.42 3,210 1912 September 29 -- 1,110
1993 March 30 9.88 3,200 1991 September 16 4.45 1,040
1983 June 13 7.05 3,190 1937 May 1 -- 1,010
1981 September 8 6.97 3,160 1961 April 26 3.97 884
1976 April 3 6.84 3,120 1977 July 5 4.13 866
1995 March 30 13.25 3,110 1939 April 20 3.80 830
1940 April 15 11.43 3,100 1911 June 9 7.92 793
1964 April 17 6.58 3,050 1935 March 27 5.02 696
1948 April 7 -- 3,000 1990 June 22 3.77 652
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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 -- -- -- -- -- -- -- -- -- 509.8 1,189 387.4 --
1910 382.0 280.2 260.0 220.0 115.0 646.6 1,304 323.7 118.1 31.9 33.5 38.5 313.1
1911 43.1 48.0 50.0 45.0 45.0 55.0 236.6 91.6 180.5 26.1 67.9 60.3 78.8
1912 80.0 75.5 65.0 30.0 35.0 38.0 317.0 240.7 108.5 135.9 69.4 337.1 127.3
1913 365.4 79.9 60.0 34.9 28.9 32.6 1,291 300.7 120.3 100.0 84.7 87.8 215.1
1914 125.4 97.0 64.5 55.2 71.7 75.5 306.9 540.5 862.7 613.4 177.5 198.3 266.2
1915 177.3 141.2 57.1 50.0 50.0 60.0 674.7 493.4 988.5 1,368 155.2 99.9 360.9
1916 120.0 91.5 78.5 68.4 76.0 64.0 2,099 1,395 785.1 607.0 133.4 137.1 470.1
1917 106.5 62.4 57.1 70.0 70.0 108.5 625.4 213.5 85.7 66.6 58.0 70.1 132.5
1935 10.0 19.0 22.8 31.7 33.6 160.4 255.0 191.4 89.2 51.6 26.7 45.0 78.1
1936 29.8 27.2 26.8 29.1 24.2 23.3 539.5 348.7 67.8 8.34 1.49 2.92 93.8
1937 18.0 24.5 21.4 24.5 19.1 13.6 249.2 344.9 207.0 97.9 116.8 180.1 109.9
1938 102.9 59.3 28.2 32.5 42.6 185.3 164.4 1,277 309.2 115.5 28.8 22.2 199.3
1939 24.9 32.6 30.9 34.8 24.4 20.0 274.9 172.6 59.9 39.2 17.4 42.3 64.4
1940 54.0 48.0 39.6 21.4 25.3 32.6 855.5 497.6 93.1 27.1 13.4 20.7 143.5
1941 29.8 50.4 57.2 51.8 38.7 29.7 1,029 313.5 1,038 231.6 111.3 430.8 282.5
1942 537.0 224.6 74.8 34.5 32.4 460.0 754.6 830.0 107.4 53.2 94.5 590.3 317.3
1943 310.6 108.8 59.9 48.6 45.9 79.4 1,561 868.3 1,293 355.7 210.6 125.4 421.5
1944 98.0 101.3 68.7 38.8 47.2 42.5 284.5 438.0 631.1 391.5 847.6 414.8 284.2
1945 332.5 350.1 213.1 65.3 51.6 979.1 1,737 850.0 268.0 133.1 101.8 266.7 446.7
1946 321.9 143.9 105.5 80.2 60.2 993.2 1,263 462.1 258.2 263.5 47.2 60.6 339.6
1947 187.2 154.7 92.7 71.8 52.2 94.2 2,346 1,609 1,850 499.2 130.0 132.1 600.5
1948 156.3 107.3 79.2 53.4 29.9 61.5 1,946 731.5 104.5 137.5 75.9 44.2 292.6
1949 39.5 50.6 42.1 41.4 38.1 46.6 563.2 377.5 1,154 608.5 778.1 293.4 336.6
1950 158.5 167.7 99.5 67.4 57.5 58.9 2,262 5,059 1,013 906.9 214.1 119.1 854.7
1951 238.6 167.9 103.4 89.7 82.9 98.2 1,891 1,339 241.4 75.6 78.9 259.4 388.6
1952 179.4 139.3 119.5 108.7 97.4 142.7 1,454 450.3 226.1 822.9 152.9 78.0 330.6
1953 66.4 51.1 56.5 63.6 65.8 251.4 551.6 563.5 550.0 626.3 147.2 92.3 258.1
1954 81.3 87.5 87.9 79.2 88.3 134.9 1,118 505.5 326.2 94.9 72.5 72.5 228.3
1955 72.2 69.8 58.1 46.8 39.3 48.0 1,108 257.6 367.2 114.7 41.8 25.5 186.4
1956 49.1 47.9 51.9 49.5 47.7 48.5 1,318 754.4 253.1 74.8 71.5 182.3 244.5
1957 56.1 148.4 57.5 42.6 39.9 253.5 1,271 430.1 1,584 1,015 88.0 353.5 444.0
1958 214.8 258.1 83.8 61.6 54.3 106.9 145.8 133.3 245.3 469.0 48.2 35.2 155.3
1959 63.4 72.2 44.3 41.7 35.5 132.1 462.9 340.3 372.1 174.6 86.8 55.2 156.8
1960 70.9 54.1 54.3 43.4 37.6 53.5 741.1 280.1 520.4 179.4 41.9 64.2 177.4
1961 45.5 77.8 52.3 32.6 26.9 158.3 406.2 370.4 73.8 42.1 28.5 103.6 118.4
1962 100.4 72.7 47.7 43.9 41.8 46.7 1,112 2,459 3,042 1,613 316.4 245.1 763.8
1963 128.7 155.0 118.4 52.3 30.0 181.4 649.4 389.7 644.8 352.2 78.4 52.0 236.2
1964 45.9 53.0 50.7 42.0 45.5 60.3 1,028 666.7 631.5 211.5 50.9 155.2 252.2
1965 194.9 114.0 64.8 56.4 47.7 53.5 2,778 1,231 1,437 296.1 97.9 194.9 545.0
1966 538.2 185.6 143.7 102.0 75.1 411.1 3,458 1,247 280.3 112.0 288.0 171.1 583.7
1967 108.5 107.0 83.8 81.1 73.4 354.4 2,024 1,025 567.4 183.0 55.9 34.7 390.9
1968 57.8 65.0 69.8 63.0 64.8 526.8 420.4 262.3 485.8 819.8 265.5 126.0 270.0
1969 141.6 108.0 86.5 76.0 75.6 95.4 2,487 853.9 464.7 175.9 164.5 100.4 400.9
1970 291.1 224.0 136.0 134.8 97.7 76.0 2,115 1,352 786.0 159.1 54.3 56.1 456.1
1971 121.1 230.5 119.7 101.8 60.7 119.8 1,160 327.1 212.8 136.5 123.8 184.6 240.8
1972 1,350 1,233 185.1 103.5 103.3 818.5 2,336 995.0 269.8 169.6 292.0 141.5 666.0
1973 152.5 165.5 90.3 70.7 62.1 898.0 254.8 148.9 67.3 56.2 219.0 1,267 287.9
1974 804.0 235.2 128.1 97.6 120.0 118.8 2,542 1,601 475.7 84.2 341.9 103.1 554.8
1975 117.2 153.3 110.4 108.7 101.4 124.2 2,640 1,215 469.8 1,402 190.5 110.2 562.6
1976 112.3 135.1 96.9 89.8 97.2 253.0 974.6 102.6 81.5 121.1 113.0 15.5 181.9
1977 27.7 41.4 38.3 36.2 36.1 79.8 108.0 32.2 77.5 238.1 75.9 274.2 88.8
1978 325.3 275.2 246.5 165.5 125.5 113.4 3,233 302.0 200.0 256.7 175.8 136.2 460.2
1979 65.1 56.3 54.3 52.2 85.2 85.8 2,905 845.4 468.7 778.1 429.2 107.8 493.5
1980 72.6 200.1 116.4 94.5 103.4 110.5 730.0 68.4 26.5 104.7 116.8 108.9 153.4
1981 80.9 87.5 59.9 50.3 55.5 62.7 61.0 71.2 379.4 545.8 369.0 621.4 204.0
1982 -- -- -- -- -- 351.0 2,089 1,178 288.6 455.6 159.0 47.3 --
1983 418.5 145.5 117.3 99.8 90.1 864.8 589.4 315.5 818.7 461.4 374.6 260.8 381.3
1984 285.9 175.6 126.3 91.1 149.7 447.7 555.3 212.1 1,007 167.9 92.4 23.7 276.8
1985 376.8 251.4 141.5 84.2 65.2 588.9 596.0 1,134 605.0 918.0 1,686 471.4 581.8
1986 454.3 208.9 164.3 125.7 125.2 591.5 1,747 1,252 254.2 241.3 138.1 102.8 451.7
1987 100.8 101.4 104.0 83.7 75.0 440.4 204.1 533.0 228.6 491.3 314.9 128.3 235.9
1988 89.8 89.7 77.9 89.9 94.0 330.5 727.8 137.5 75.5 89.5 95.6 63.1 163.0
1989 62.8 59.8 71.9 88.2 74.5 81.4 1,349 343.7 264.3 172.5 76.8 77.0 225.7
1990 44.8 35.4 25.5 35.4 41.9 105.6 217.1 133.9 297.8 116.9 70.2 25.5 95.8
1991 27.3 32.5 35.6 35.5 33.8 77.5 94.9 167.0 90.3 488.2 133.5 284.7 125.8
1992 82.1 92.1 89.5 73.6 69.1 445.9 361.6 243.2 90.6 322.1 363.5 507.6 228.9
1993 104.5 93.8 87.8 83.0 83.0 408.9 844.0 247.2 360.0 841.4 833.8 278.1 357.3
1994 100.5 99.4 121.7 86.2 72.6 196.9 497.7 564.1 711.8 1,673 299.8 339.4 399.4
1995 365.8 318.2 182.3 153.5 127.5 1,136 666.8 733.0 199.5 768.6 263.5 325.3 439.9
1996 773.7 234.1 161.6 149.0 140.7 148.1 3,347 2,057 372.6 217.6 202.0 71.6 655.2
1997 101.3 177.9 126.1 121.6 124.7 134.1 3,507 700.7 1,058 2,389 284.3 123.3 737.2
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