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Period of record, 1902-94
----------------------------------------------------------------------------------------------------------
Statistics of monthly and annual mean discharges, period of record
[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 1,740 1994 0 m 306 306 1.00 4.29
November 942 1907 0 1937 266 221 0.83 3.73
December 800 1987 0 1938 220 185 0.84 3.08
January 740 1986 0 m 202 167 0.83 2.84
February 778 1987 0.179 1933 202 160 0.79 2.84
March 3,760 1966 26.8 1937 661 680 1.03 9.27
April 9,920 1969 102 1934 1,700 1,940 1.14 23.8
May 4,590 1986 8.12 1934 995 860 0.86 14.0
June 5,120 1962 2.87 1936 1,010 883 0.88 14.1
July 5,690 1962 0 m 847 1,080 1.27 11.9
August 3,290 1993 0 m 411 516 1.25 5.77
September 2,280 1993 0 m 316 371 1.17 4.43
Annual 1,930 1986 17.5 1934 596 451 0.76 100
__________________________________________________________________________________________________________
----------------------------------------------------------------------------------------------------------------------
Monthly and annual flow duration, in cubic feet per second, period of record
______________________________________________________________________________________________________________________
Percentage
of days
discharge Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. Annual
equaled or
exceeded
______________________________________________________________________________________________________________________
95 8.43 12.8 48.9 156 88.7 54.4 20.7 2.00 0.49 4.14 7.89 6.39 13.7
90 24.3 26.5 84.1 236 201 143 63.7 23.0 13.7 23.8 27.0 21.8 38.1
85 37.5 39.7 115 306 269 189 105 39.1 30.6 49.2 49.4 37.7 66.0
80 49.2 64.9 152 363 323 243 153 61.9 48.4 68.5 73.6 58.6 94.0
75 68.7 80.6 177 418 376 304 201 91.9 69.7 86.8 92.0 72.1 122
70 85.1 92.7 204 474 429 371 251 124 93.1 107 109 92.0 152
65 103 109 234 532 490 441 302 154 113 132 125 107 182
60 126 126 270 610 561 518 356 182 138 156 141 122 217
55 143 146 315 698 632 599 412 209 165 182 164 146 252
50 160 168 357 797 730 712 481 245 190 212 190 168 298
45 186 191 398 912 828 824 571 288 216 247 226 190 349
40 214 215 440 1,050 931 942 669 340 270 288 268 215 403
35 240 240 485 1,250 1,040 1,060 779 401 327 333 315 244 468
30 266 265 530 1,490 1,140 1,180 896 466 378 382 361 280 532
25 298 296 602 1,810 1,290 1,400 1,060 538 433 435 404 325 639
20 352 329 718 2,260 1,520 1,620 1,220 616 504 492 447 380 778
15 406 364 891 2,770 1,790 1,930 1,480 769 576 562 520 440 1,000
10 462 430 1,290 3,920 2,120 2,260 1,810 984 746 736 597 514 1,360
5 559 544 2,730 6,800 2,750 3,040 2,790 1,360 1,010 914 744 618 2,170
______________________________________________________________________________________________________________________
--------------------------------------------------------------------------------------------------
Probability of annual high discharges, period of record
[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)1
__________________________________________________________________________________________________
0.99 1.01 301 264 220 176 138
0.95 1.05 609 531 449 356 285
0.90 1.11 884 770 655 517 416
0.80 1.25 1,380 1,200 1,030 810 652
0.50 2 3,210 2,810 2,450 1,900 1,500
0.20 5 7,330 6,500 5,780 4,410 3,320
0.10 10 11,200 10,000 9,010 6,830 4,970
0.04 25 17,600 15,900 14,500 10,900 7,560
0.02 50 23,400 21,400 19,600 14,600 9,860
0.01 100 30,300 27,900 25,700 19,100 12,500
0.005 200 38,300 35,600 33,000 24,300 15,400
0.002 500 50,800 ng ng ng ng
__________________________________________________________________________________________________
1Historic adjustment made to Log Pearson Type III peak frequency.
------------------------------------------------------------------------------------
Probability of annual low discharges, period of record
____________________________________________________________________________________
Minimum average discharge (ft3/s)
________________________________________________________________
Number of consecutive days
________________________________________________________________
Non- Recur-
exceed- rence
ance inter- 1 3 7 14 30 60 90 120 183
prob- val
ability (years)
____________________________________________________________________________________
0.05 20 0 0 0 0 0 0.407 3.61 6.28 6.16
0.10 10 0 0.371 1.32 2.24 2.70 4.82 12.1 17.4 18.5
0.20 5 11.0 12.6 18.0 18.9 22.5 26.0 35.4 43.8 54.6
0.50 2 59.8 64.9 71.8 90.7 121 150 1151 153 214
____________________________________________________________________________________
1Graphical interpretation.
-------------------------------------------------------------------------------------
Probability of seasonal low discharges, period of record
_________________________________________________________________________________________
Minimum average discharge (ft3/s)
_____________________________________________________________
Number of consecutive days
_____________________________________________________________
Non- Recurrence
exceedance interval 1 7 14 30 1 7 14 30
probability (years)
_________________________________________________________________________________________
December-January-February March-April-May
__________________________ ___________________________
0.05 20 0 0 0 1.84 7.15 18.2 18.5 56.5
0.10 10 9.66 14.4 17.3 121.0 22.8 37.7 45.0 91.8
0.20 5 28.7 36.4 40.7 145.0 62.2 79.0 105 156
0.50 2 102 113 119 153 211 220 290 370
June-July-August September-October-November
__________________________ ___________________________
0.05 20 0 0 0.331 6.27 0 0 0 0.390
0.10 10 7.24 13.0 117.8 22.5 0.255 5.01 16.80 8.58
0.20 5 27.0 38.9 42.3 61.4 14.2 22.8 24.8 37.1
0.50 2 135 158 242 245 91.5 108 152 188
________________________________________________________________________________________
1Graphical interpretation.
Pre-regulation period, 1902-41
----------------------------------------------------------------------------------------------------------
Statistics of monthly and annual mean discharges, pre-regulation period
[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 1,030 1917 0 m 266 288 1.08 5.51
November 942 1907 0 1937 230 236 1.02 4.77
December 600 1907 0 1938 166 175 1.05 3.44
January 504 1907 0 m 133 138 1.04 2.75
February 367 1907 0.179 1933 119 110 0.92 2.47
March 2,130 1910 26.8 1937 522 528 1.01 10.8
April 6,080 1916 102 1934 971 1,140 1.17 20.1
May 2,540 1916 8.12 1934 642 547 0.85 13.3
June 2,200 1907 2.87 1936 647 590 0.91 13.4
July 5,460 1916 0 m 562 907 1.62 11.6
August 1,850 1916 0 m 308 410 1.33 6.38
September 1,250 1916 0 m 261 318 1.22 5.42
Annual 1,850 1916 17.5 1934 403 374 0.93 100
__________________________________________________________________________________________________________
----------------------------------------------------------------------------------------------------------------------
Monthly and annual flow duration, in cubic feet per second, pre-regulation period
_________________________________________________________________________________________________________________________
Percentage
of days
discharge Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. Annual
equaled or
exceeded
_________________________________________________________________________________________________________________________
95 0.05 0.05 32.6 90.0 50.1 11.5 0.49 0.49 0.05 0.05 0.05 0 0.49
90 4.83 9.13 46.5 153 92.3 50.3 16.1 0.49 0.05 4.22 4.94 0.32 12.4
85 14.2 18.4 59.8 205 156 110 40.7 10.2 6.12 13.4 16.6 14.0 25.7
80 22.1 24.3 77.3 256 209 151 69.6 22.5 13.4 23.7 26.1 20.6 39.5
75 32.8 33.1 98.0 308 263 188 94.1 30.5 23.6 39.7 39.4 29.4 55.6
70 37.0 38.0 121 344 305 229 120 43.3 42.5 54.8 54.3 36.4 75.7
65 41.0 44.1 143 383 341 278 162 60.2 64.4 76.9 76.7 44.9 98.6
60 46.4 52.1 162 431 378 328 199 89.4 86.4 95.1 94.9 61.1 127
55 53.1 69.5 197 478 426 381 236 115 105 110 114 74.0 162
50 71.6 79.0 272 524 474 433 274 143 130 146 134 87.4 203
45 89.4 88.3 372 585 527 494 312 174 163 192 154 114 250
40 111 101 407 653 594 559 370 213 206 227 210 140 304
35 137 115 440 741 661 624 429 268 254 285 266 186 358
30 171 144 474 892 748 755 527 385 336 373 345 243 420
25 223 204 545 1,110 857 890 649 462 388 443 389 290 481
20 274 228 634 1,340 977 1,040 825 521 438 495 429 331 585
15 308 253 791 1,880 1,140 1,190 1,080 621 553 560 476 382 720
10 356 294 1,100 2,640 1,340 1,570 1,360 878 756 760 582 467 963
5 419 343 2,000 3,020 1,880 2,160 1,860 1,260 994 889 733 584 1,400
_________________________________________________________________________________________________________________________
--------------------------------------------------------------------------------------------------
Probability of annual high discharges, pre-regulation period
[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 1.01 224 213 174 138 106
0.95 1.05 436 404 340 270 208
0.90 1.11 615 563 482 382 295
0.80 1.25 922 834 727 576 446
0.50 2 1,920 1,730 1,550 1,220 956
0.20 5 3,830 3,460 3,160 2,470 1,970
0.10 10 5,390 4,910 4,510 3,520 2,840
0.04 25 7,660 7,070 6,530 5,060 4,140
0.02 50 9,530 8,900 8,240 6,360 5,250
0.01 100 11,600 10,900 10,100 7,770 6,470
0.005 200 13,700 13,100 12,200 9,310 7,820
0.002 500 16,800 ng ng ng ng
__________________________________________________________________________________________________
------------------------------------------------------------------------------------
Probability of annual low discharges, pre-regulation period
____________________________________________________________________________________
Minimum average discharge (ft3/s)
________________________________________________________________
Number of consecutive days
________________________________________________________________
Non- Recur-
exceed- rence
ance inter- 1 3 7 14 30 60 90 120 183
prob- val
ability (years)
____________________________________________________________________________________
0.05 20 0 0 0 0 0 0 0 0 1.42
0.10 10 0 0 0 0 0 0.119 2.30 4.37 4.87
0.20 5 0 0 0 0 0.712 3.64 9.93 15.0 17.5
0.50 2 35.4 40.6 47.2 51.8 74.0 63.6 66.7 79.0 111
____________________________________________________________________________________
-------------------------------------------------------------------------------------
Probability of seasonal low discharges, pre-regulation period
_________________________________________________________________________________________
Minimum average discharge (ft3/s)
_____________________________________________________________
Number of consecutive days
_____________________________________________________________
Non- Recurrence
exceedance interval 1 7 14 30 1 7 14 30
probability (years)
_________________________________________________________________________________________
December-January-February March-April-May
___________________________ ___________________________
0.05 20 0 0 0 0 0 5.71 6.08 29.2
0.10 10 0 0 0 0 8.92 14.9 16.9 51.2
0.20 5 6.21 10.7 13.8 15.7 26.8 36.4 47.6 95.0
0.50 2 48.7 55.8 59.4 64.0 120 137 195 259
June-July-August September-October-November
___________________________ ___________________________
0.05 20 0 0 0 0 0 0 0 0
0.10 10 0 0 0.004 3.63 0 0 0 0
0.20 5 8.61 12.6 116.4 20.2 0.896 5.19 17.34 9.49
0.50 2 80.9 98.3 139 1160 60.2 80.4 111 133
_________________________________________________________________________________________
1Graphical interpretation.Post-regulation period
----------------------------------------------------------------------------------------------------------
Statistics of monthly and annual mean discharges, post-regulation period
[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 1,740 1994 3.77 1977 336 318 0.95 3.78
November 893 1987 12.0 1977 293 207 0.70 3.30
December 800 1987 11.7 1977 261 184 0.71 2.93
January 740 1986 14.8 1977 255 169 0.66 2.87
February 778 1987 19.0 1977 265 163 0.62 2.98
March 3,760 1966 85.2 1977 766 763 1.00 8.62
April 9,920 1969 194 1977 2,250 2,230 0.99 25.3
May 4,590 1986 77.1 1977 1,260 957 0.76 14.2
June 5,120 1962 91.1 1977 1,280 973 0.76 14.4
July 5,690 1962 63.0 1988 1,070 1,150 1.08 12.0
August 3,290 1993 18.5 1977 491 576 1.17 5.53
September 2,280 1993 12.3 1976 359 406 1.13 4.03
Annual 1,930 1986 64.7 1977 741 454 0.61 100
__________________________________________________________________________________________________________
----------------------------------------------------------------------------------------------------------------------
Monthly and annual flow duration, in cubic feet per second, post-regulation period
__________________________________________________________________________________________________________________________
Percentage
of days
discharge Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. Annual
equaled or
exceeded
__________________________________________________________________________________________________________________________
95 64.0 81.3 119 266 242 168 102 44.7 25.9 50.8 53.8 53.0 63.5
90 77.9 92.6 164 350 320 224 162 74.0 44.5 65.7 80.6 74.5 96.9
85 92.3 112 192 421 385 300 223 112 67.0 86.6 96.7 91.8 124
80 112 125 212 490 447 393 286 142 90.5 108 112 106 151
75 131 139 232 564 539 483 351 167 112 128 126 119 178
70 145 157 255 660 636 602 410 189 132 148 140 133 208
65 159 176 279 743 730 701 469 213 155 168 157 157 239
60 174 193 319 831 823 794 538 238 176 189 175 174 273
55 193 209 362 927 904 884 612 265 195 217 196 188 321
50 214 230 404 1,060 985 983 686 315 214 246 226 202 369
45 232 250 438 1,250 1,070 1,080 769 360 264 278 261 219 420
40 248 272 468 1,470 1,180 1,250 866 402 322 311 296 239 472
35 272 296 498 1,690 1,320 1,430 995 443 367 347 337 275 544
30 306 319 555 1,950 1,450 1,570 1,140 524 407 382 377 325 645
25 351 345 628 2,290 1,640 1,720 1,300 609 454 425 412 371 775
20 400 376 796 2,800 1,840 1,940 1,480 700 504 469 460 418 930
15 444 420 995 3,840 2,110 2,180 1,680 821 605 541 526 473 1,220
10 507 498 1,490 5,850 2,520 2,550 2,080 995 756 680 615 528 1,670
5 611 627 3,070 9,190 3,250 3,420 3,270 1,270 1,010 927 755 628 2,480
__________________________________________________________________________________________________________________________
--------------------------------------------------------------------------------------------------
Probability of annual high discharges, post-regulation period
[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 1.01 522 391 319 252 222
0.95 1.05 1,010 814 670 524 447
0.90 1.11 1,430 1,190 985 765 640
0.80 1.25 2,150 1,860 1,550 1,200 977
0.50 2 4,590 4,210 3,610 2,750 2,120
0.20 5 9,500 9,130 8,080 6,100 4,390
0.10 10 13,700 13,400 12,100 9,110 6,320
0.04 25 20,100 20,000 18,500 13,800 9,190
0.02 50 25,600 25,700 24,100 18,000 11,600
0.01 100 31,700 32,100 30,500 22,700 14,300
0.005 200 38,500 39,100 37,700 28,100 17,200
0.002 500 48,500 ng ng ng ng
__________________________________________________________________________________________________
------------------------------------------------------------------------------------
Probability of annual low discharges, post-regulation period
____________________________________________________________________________________
Minimum average discharge (ft3/s)
________________________________________________________________
Number of consecutive days
________________________________________________________________
Non- Recur-
exceed- rence
ance inter- 1 3 7 14 30 60 90 120 183
prob- val
ability (years)
____________________________________________________________________________________
0.05 20 1.83 4.06 9.63 113.6 17.6 29.0 36.3 40.5 49.9
0.10 10 8.85 10.6 17.9 123.7 29.5 44.8 54.9 61.0 73.6
0.20 5 23.9 25.9 33.7 40.7 52.4 72.5 86.8 95.8 113
0.50 2 85.3 89.5 92.9 130 133 161 184 200 232
____________________________________________________________________________________
1Graphical interpretation.
-------------------------------------------------------------------------------------
Probability of seasonal low discharges, post-regulation record
[ng, statistic not given]
_____________________________________________________________________________________
Minimum average discharge (ft3/s)
_________________________________________________________
Number of consecutive days
_________________________________________________________
Non- Recurrence
exceedance interval 1 7 14 30 1 7 14 30
probability (years)
_____________________________________________________________________________________
December-January-February March-April-May
_________________________ __________________________
0.05 20 30.4 34.8 36.7 40.9 ng 59.9 75.8 154
0.10 10 44.0 51.2 54.5 60.6 ng 93.7 112 186
0.20 5 67.0 78.9 84.7 93.5 ng 148 169 237
0.50 2 138 163 175 191 ng 278 304 403
June-July-August September-October-November
_________________________ __________________________
0.05 20 11.2 21.8 33.1 55.2 8.54 11.9 116.8 21.7
0.10 10 23.7 38.3 53.9 82.9 19.5 22.7 130.4 38.2
0.20 5 53.2 72.2 93.7 133 35.7 43.3 52.2 70.6
0.50 2 187 209 242 308 93.0 121 173 186
_____________________________________________________________________________________
1Graphical interpretation.
-------------------------------------------------------------------------------------
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
11882 April 11 36.80 20,000 1945 March 22 20.70 7,700
11897 April 7 39.10 25,000 1946 March 27 17.13 5,970
1902 May 23 9.50 1,180 1947 April 15 22.93 9,300
1903 April 6 12.90 2,450 1948 April 10 12.45 3,390
1904 April 20 20.30 5,220 1949 July 12 11.27 2,660
1905 May 17 17.40 4,250 1950 April 7 20.88 7,800
1906 April 9 14.50 3,050 1951 April 11 20.73 8,010
1907 March 31 28.80 7,000 1952 April 16 28.79 16,300
1908 June 13 13.70 2,600 1953 June 1 18.05 6,720
1909 May 30 -- 1,780 1954 July 4 10.53 1,920
1910 March 19 22.20 5,000 1955 April 4 11.12 2,760
1911 April 11 7.70 608 1956 April 16 12.54 3,870
1912 May 14 9.60 1,100 1957 April 24 11.10 2,540
1913 July 8 10.90 1,560 1958 July 6 10.90 2,280
1914 June 12 16.10 3,140 1959 July 8 10.42 1,250
1915 July 3 9.73 3,130 1960 April 8 12.48 3,900
1916 July 11 -- 7,740 1961 June 9 9.24 1,020
1917 April 3 17.80 5,240 1962 June 14 22.83 9,580
1918 March 31 6.87 874 1963 June 14 19.97 4,930
1919 April 6 6.50 680 1964 April 18 16.22 2,400
1920 March 28 17.20 6,200 1965 April 15 30.50 11,400
1921 April 6 8.40 1,970 1966 March 22 30.16 10,700
1922 April 11 14.70 5,200 1967 June 19 22.34 5,900
1923 June 29 11.60 3,960 1968 April 30 14.71 788
1924 April 30 6.20 530 1969 April 15 37.34 25,300
1925 June 21 7.00 940 1970 June 18 16.27 2,480
1926 March 24 8.00 1,600 1971 July 7 15.87 1,910
1927 March 19 9.10 2,650 1972 March 24 25.36 7,250
1928 March 28 13.30 3,840 1973 March 15 16.41 1,950
1929 March 20 12.80 4,440 1974 April 14 20.25 4,150
1930 March 17 10.00 1,340 1975 July 4 33.26 13,200
1931 April 3 8.55 365 1976 March 30 18.70 3,200
1932 April 11 9.45 875 1977 July 4 14.99 878
1933 April 5 9.04 605 1978 April 2 34.41 17,500
1934 April 10 8.55 323 1979 April 19 34.93 17,300
1935 March 20 9.72 942 1980 April 5 20.74 5,470
1936 April 14 9.90 1,050 1981 May 24 15.84 1,710
1937 April 12 10.17 1,390 1982 April 4 25.07 5,920
1938 May 2 10.02 1,350 1983 July 4 15.99 1,750
1939 March 31 13.00 3,870 1984 April 1 28.27 9,550
1940 April 8 9.63 1,030 1985 June 5 20.08 4,690
1941 April 3 10.10 1,390 1986 April 2 27.19 8,640
1942 June 11 12.27 3,380 1987 March 27 17.75 3,300
1943 April 7 28.40 16,000 1988 March 11 15.10 981
1944 June 10 14.26 4,150 1989 April 9 35.39 18,900
1990 June 2 15.40 1,220 1993 April 5 28.27 10,100
1991 July 6 16.99 2,630 1994 April 3 26.69 11,200
1992 June 19 16.93 2,590
Annual peak discharge, from highest to lowest, and corresponding gage height
1969 April 15 37.34 25,300 1960 April 8 12.48 3,900
11897 April 7 39.10 25,000 1939 March 31 13.00 3,870
11882 April 11 36.80 20,000 1956 April 16 12.54 3,870
1989 April 9 35.39 18,900 1928 March 28 13.30 3,840
1978 April 2 34.41 17,500 1948 April 10 12.45 3,390
1979 April 19 34.93 17,300 1942 June 11 12.27 3,380
1952 April 16 28.79 16,300 1987 March 27 17.75 3,300
1943 April 7 28.40 16,000 1976 March 30 18.70 3,200
1975 July 4 33.26 13,200 1914 June 12 16.10 3,140
1965 April 15 30.50 11,400 1915 July 3 9.73 3,130
1994 April 3 26.69 11,200 1906 April 9 14.50 3,050
1966 March 22 30.16 10,700 1955 April 4 11.12 2,760
1993 April 5 28.27 10,100 1949 July 12 11.27 2,660
1962 June 14 22.83 9,580 1927 March 19 9.10 2,650
1984 April 1 28.27 9,550 1991 July 6 16.99 2,630
1947 April 15 22.93 9,300 1908 June 13 13.70 2,600
1986 April 2 27.19 8,640 1992 June 19 16.93 2,590
1951 April 11 20.73 8,010 1957 April 24 11.10 2,540
1950 April 7 20.88 7,800 1970 June 18 16.27 2,480
1916 July 11 -- 7,740 1903 April 6 12.90 2,450
1945 March 22 20.70 7,700 1964 April 18 16.22 2,400
1972 March 24 25.36 7,250 1958 July 6 10.90 2,280
1907 May 30 28.80 7,000 1921 April 6 8.40 1,970
1953 June 1 18.05 6,720 1973 March 15 16.41 1,950
1920 March 28 17.20 6,200 1954 July 4 10.53 1,920
1946 March 27 17.13 5,970 1971 July 7 15.87 1,910
1982 April 4 25.07 5,920 1909 May 30 -- 1,780
1967 June 19 22.34 5,900 1983 July 15.99 1,750
1980 April 5 20.74 5,470 1981 May 24 15.84 1,710
1917 April 3 17.80 5,240 1926 March 24 8.00 1,600
1904 April 20 20.30 5,220 1913 July 8 10.90 1,560
1922 April 11 14.70 5,200 1937 April 12 10.17 1,390
1910 March 19 22.20 5,000 1941 April 3 10.10 1,390
1963 June 14 19.97 4,930 1938 May 2 10.02 1,350
1985 June 5 20.08 4,690 1930 March 17 10.00 1,340
1929 March 20 12.80 4,440 1959 July 8 10.42 1,250
1905 May 17 17.40 4,250 1990 June 2 15.40 1,220
1944 June 10 14.26 4,150 1902 May 23 9.50 1,180
1974 April 14 20.25 4,150 1912 May 14 9.60 1,100
1923 June 29 11.60 3,960 1936 April 14 9.90 1,050
1940 April 8 9.63 1,030 1968 April 30 14.71 788
1961 June 9 9.24 1,020 1919 April 6 6.50 680
1988 March 11 15.10 981 1911 April 11 7.70 608
1935 March 20 9.72 942 1933 April 5 9.04 605
1925 June 21 7.00 940 1924 April 30 6.20 530
1977 July 4 14.99 878 1931 April 3 8.55 365
1932 April 11 9.45 875 1934 April 10 8.55 323
1918 March 31 6.87 874
1Historic data, not used in statistics.
---------------------------------------------------------------------------------------------------------------------------------
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
__________________________________________________________________________________________________________________________________
1901 -- -- -- -- -- -- -- -- 464.7 517.2 466.0 352.1 --
1902 380.1 305.0 257.0 228.0 198.0 432.0 469.0 732.3 904.0 676.2 462.6 327.7 449.1
1903 275.1 297.5 150.0 150.0 100.0 150.0 1,260 565.8 459.6 363.1 268.0 317.2 362.8
1904 471.2 438.0 293.0 260.0 243.0 374.0 2,590 1,043 1,269 1,123 501.8 452.5 752.9
1905 488.3 427.6 244.0 150.0 101.0 400.0 583.6 1,689 1,017 1,097 1,183 989.4 701.8
1906 846.9 739.0 584.0 394.0 301.0 600.0 2,053 1,628 1,678 1,547 1,288 1,074 1,064
1907 939.7 942.0 600.0 504.0 367.0 1,540 2,920 1,373 2,201 1,010 568.1 428.3 1,117
1908 456.0 399.8 315.0 290.0 250.0 500.0 1,100 691.3 1,725 1,264 695.9 461.8 678.7
1909 414.4 360.0 300.0 190.0 140.0 377.0 947.3 937.3 1,113 609.3 684.9 791.0 573.0
1910 761.6 574.0 488.0 407.0 324.0 2,126 1,425 966.5 491.2 220.0 85.3 47.9 662.8
1911 58.3 45.0 37.0 33.0 32.0 245.6 370.4 282.8 240.1 101.6 166.4 160.2 148.0
1912 244.8 135.0 120.0 89.0 80.0 89.0 564.1 727.5 528.3 482.7 330.3 223.8 301.8
1913 248.5 250.0 190.0 110.0 80.0 150.0 461.2 360.7 339.1 637.8 268.2 421.0 294.0
1914 493.6 436.3 351.7 290.0 200.0 327.1 666.0 876.5 1,550 1,013 510.5 541.5 605.9
1915 582.7 532.0 410.0 340.0 310.0 390.0 1,004 788.3 1,528 1,904 1,056 789.8 805.2
1916 793.7 571.4 400.0 265.0 254.0 646.0 6,075 2,542 2,118 5,455 1,848 1,248 1,853
1917 1,028 631.0 488.0 419.0 363.0 924.0 3,175 1,805 721.8 330.2 143.6 90.4 843.8
1918 107.5 132.0 86.3 42.0 32.6 342.3 376.4 444.8 440.3 251.5 186.2 116.0 214.1
1919 95.5 123.6 102.0 77.2 77.5 276.1 463.1 467.7 398.3 293.7 282.3 209.0 239.5
1920 188.8 252.3 153.7 155.0 150.0 1,678 888.1 928.6 1,218 960.2 497.8 458.0 629.2
1921 466.2 413.8 305.5 216.9 244.2 480.3 738.5 513.1 612.9 254.3 183.1 139.6 380.8
1922 144.9 95.2 70.0 25.0 23.1 1,856 2,643 1,073 694.8 308.7 88.5 37.0 589.8
1923 40.4 96.4 58.4 49.4 31.2 57.0 1,104 543.6 861.2 533.3 91.2 68.2 294.1
1924 87.8 93.4 72.7 52.0 50.0 72.0 266.9 302.5 204.9 165.4 85.1 91.5 128.7
1925 162.0 124.2 54.5 37.1 39.9 158.4 296.6 236.1 563.9 283.9 138.4 129.0 185.5
1926 147.0 117.0 64.2 48.3 62.7 474.2 352.0 203.8 172.3 57.6 47.9 55.3 150.7
1927 102.5 76.1 45.9 39.7 70.3 845.8 918.3 519.8 629.1 343.1 1,86.5 228.1 334.5
1928 208.5 174.3 95.2 96.0 86.9 949.0 499.4 370.8 295.4 293.8 78.2 113.3 272.8
1929 136.4 153.0 123.2 75.6 70.3 1,421 513.5 357.0 173.5 75.2 23.3 24.6 264.3
1930 53.7 62.2 33.7 36.5 148.8 710.9 398.3 590.1 290.2 145.2 38.3 16.2 211.0
1931 30.5 37.7 24.6 21.1 39.3 128.0 190.4 167.6 132.0 64.8 20.8 15.6 72.7
1932 26.6 28.0 21.6 36.1 47.3 134.9 231.8 55.6 33.2 7.73 0 8.78 52.4
1933 14.1 6.74 1.93 0 0.179 129.3 206.8 73.6 51.1 15.3 1.59 .077 41.8
1934 4.72 2.49 13.3 14.0 20.5 43.0 102.1 8.12 3.31 0 0 0 17.5
1935 0 ,.590 0.574 0 11.7 386.3 151.5 112.6 86.7 183.7 32.5 8.45 82.0
1936 4.88 1.91 0.587 13.9 5.81 161.3 428.0 86.7 2.87 0 0 0 58.6
1937 0 0 4.23 4.40 .971 26.8 444.6 252.7 183.4 107.5 55.7 139.3 101.5
1938 89.0 59.0 0 5.34 104.9 236.4 163.6 425.7 330.1 98.9 18.5 57.7 125.5
1939 29.0 19.1 21.8 93.9 98.1 739.3 705.6 213.0 130.4 85.4 12.0 0 179.2
1940 9.85 17.4 14.0 1.08 8.57 40.1 446.6 384.4 185.5 15.1 3.20 0 93.5
1941 5.71 35.0 37.7 42.7 87.0 252.4 644.3 324.4 485.3 130.0 25.3 81.5 178.6
1942 93.1 125.1 98.2 112.1 109.7 190.0 325.6 1,299 1,665 988.8 469.9 608.2 508.4
1943 530.4 431.7 314.1 318.9 272.0 463.6 6,164 1,860 2,803 1,765 770.8 428.2 1,340
1944 400.9 371.2 290.5 202.2 163.2 255.3 868.2 1,196 2,128 2,013 689.3 769.8 779.6
1945 745.1 730.1 510.2 430.9 389.2 2,814 1,671 999.3 1,107 375.4 155.0 134.4 841.4
1946 218.3 248.2 219.4 186.8 112.8 1,550 1,347 639.8 420.4 705.6 598.9 503.8 565.6
1947 578.3 535.2 490.4 413.8 338.8 513.2 3,537 1,881 1,612 1,149 247.4 201.7 957.6
1948 217.1 204.6 183.0 140.2 103.3 215.7 1,806 1,619 625.4 273.7 217.8 172.1 481.1
1949 141.4 103.7 63.3 65.3 86.3 180.9 717.8 251.2 224.5 871.9 229.8 88.4 253.1
1950 78.7 80.5 95.6 88.3 133.6 527.2 3,669 3,320 1,768 1,521 768.4 213.7 1,025
1951 145.1 96.7 116.8 153.4 153.2 255.5 3,233 1,712 1,114 632.7 388.1 341.2 694.2
1952 349.0 338.2 511.5 528.9 535.0 533.4 7,256 2,149 1,609 1,270 426.4 445.3 1,322
1953 324.1 248.6 185.7 138.0 183.2 685.9 691.5 1,253 3,281 1,539 899.4 568.5 834.5
1954 373.8 477.2 412.3 357.2 344.0 631.4 863.0 943.9 1,190 721.1 233.5 240.5 566.1
1955 154.0 143.4 171.0 221.9 186.6 276.6 862.6 375.4 322.1 705.3 456.4 454.7 361.3
1956 402.4 299.0 174.3 238.4 219.6 250.8 1,410 834.3 830.9 287.9 265.9 113.9 442.7
1957 62.3 44.0 59.0 87.2 104.5 458.8 902.0 961.7 1,112 898.6 574.2 627.3 492.2
1958 450.7 468.0 418.9 323.1 306.6 574.1 849.5 379.1 164.1 794.1 227.3 173.5 428.6
1959 147.9 152.5 160.7 245.1 242.6 364.2 407.5 427.8 687.4 617.5 216.0 164.8 319.8
1960 144.3 124.4 206.5 208.0 228.1 308.9 1,493 955.1 834.8 528.7 179.1 108.0 442.3
1961 79.4 130.2 127.2 141.2 169.4 422.3 321.8 428.4 425.2 177.2 81.5 52.6 213.2
1962 102.4 103.9 72.0 76.1 85.4 203.1 2,617 3,352 5,122 5,692 2,691 844.5 1,756
1963 515.4 424.5 302.6 288.8 189.4 420.5 777.6 629.8 2,396 529.3 190.5 149.0 566.9
1964 210.6 173.3 150.1 138.8 169.8 193.8 1,182 1,142 734.8 385.1 93.9 118.1 390.4
1965 236.5 207.2 209.8 193.7 184.6 207.2 3,740 1,648 2,787 1,515 536.0 507.5 995.5
1966 825.0 566.8 512.1 491.3 490.0 3,756 2,269 2,312 1,810 794.3 899.9 410.0 1,268
1967 468.0 476.1 459.6 427.9 384.3 902.6 2,248 1,556 2,081 1,218 259.1 85.6 880.8
1968 171.6 161.1 165.5 134.6 135.4 373.7 502.5 674.6 639.8 435.1 222.8 156.8 314.9
1969 291.2 288.2 247.9 232.4 317.9 480.9 9,924 3,574 1,483 629.8 209.2 49.2 1,471
1970 86.0 120.1 111.6 154.3 174.0 250.0 1,027 838.5 1,207 510.5 109.5 14.1 383.0
1971 61.3 162.3 124.0 137.7 125.2 565.8 663.1 377.5 368.7 706.4 141.0 246.2 307.5
1972 263.3 606.8 568.6 554.0 408.3 2,469 2,255 2,020 1,787 939.6 695.2 434.2 1,085
1973 438.5 359.7 393.8 383.8 440.6 978.1 541.2 338.0 283.2 155.0 115.5 120.2 379.0
1974 388.7 569.5 557.1 481.0 519.3 731.6 1,313 1,060 1,108 707.6 355.3 225.0 667.7
1975 296.2 259.5 184.9 188.1 267.7 388.8 3,201 1,463 2,430 5,378 708.0 433.9 1,271
1976 358.5 350.1 216.0 230.3 290.0 1,002 1,040 340.7 166.9 91.3 35.0 12.3 344.2
1977 3.77 12.0 11.7 14.8 19.0 85.2 193.9 77.1 91.1 74.8 18.5 177.7 64.7
1978 333.1 311.1 382.1 405.6 327.7 1,293 6,926 1,756 1,239 1,553 364.2 113.8 1,248
1979 154.6 108.9 100.5 97.9 93.0 266.0 6,768 2,576 1,938 1,461 1,012 634.9 1,265
1980 412.6 358.3 308.4 377.6 385.9 676.2 1,796 586.9 580.9 160.7 124.5 31.5 481.5
1981 55.4 99.8 98.2 85.8 139.7 245.1 253.9 346.3 231.5 222.0 272.3 44.5 175.0
1982 131.2 185.2 190.3 225.3 241.8 724.8 2,407 927.1 814.6 622.3 313.9 189.9 580.5
1983 479.5 362.2 332.6 294.6 300.8 702.2 632.3 394.9 227.5 578.4 304.0 362.4 415.4
1984 310.7 284.1 233.2 252.1 349.8 1,618 3,347 1,171 2,110 1,026 381.5 176.6 935.6
1985 521.0 502.2 334.7 252.8 331.3 1,468 1,102 1,341 2,175 1,348 1,148 1,049 967.0
1986 828.1 718.2 785.5 739.7 661.8 1,912 5,669 4,589 2,580 2,010 911.4 1,707 1,928
1987 1,435 893.3 800.2 706.9 778.1 1,415 926.6 668.1 507.3 365.0 153.1 152.7 734.3
1988 143.3 141.5 134.6 143.7 244.2 605.4 512.1 392.4 218.1 63.0 69.1 65.5 227.6
1989 56.3 48.6 30.9 46.9 139.2 291.5 6,367 1,145 866.1 319.8 156.1 227.2 801.7
1990 186.5 126.2 100.9 93.7 147.5 323.8 495.9 546.6 594.0 399.1 226.6 175.4 285.1
1991 132.1 81.8 72.4 72.6 86.4 334.3 567.9 927.5 1,116 1,662 587.5 750.0 535.1
1992 338.7 165.6 147.1 193.5 268.9 735.7 499.5 458.2 895.1 493.3 499.5 335.7 419.5
1993 211.8 225.1 196.2 209.7 284.8 776.2 3,993 1,328 1,909 4,119 3,293 2,280 1573
1994 1,741 738.3 466.1 603.2 697.5 2,754 5,016 2,852 1,577 2,600 853.8 315.5 1,690
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