| YEAR | Monthly mean streamflow, in ft3/s | |||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| 1897 | 655 | 323 | 883 | 1,999 | ||||||||
| 1898 | 2,307 | 3,293 | 1,750 | 1,786 | 3,686 | 835 | 512 | 796 | 295 | 611 | 1,820 | 2,462 |
| 1899 | 2,417 | 2,106 | 5,311 | 2,406 | 547 | 259 | 276 | 246 | 291 | 251 | 668 | 545 |
| 1900 | 1,256 | 3,716 | 2,980 | 1,179 | 1,261 | 410 | 214 | 157 | 168 | 143 | 225 | 313 |
| 1901 | 463 | 178 | 2,511 | 4,134 | 2,328 | 1,236 | 312 | 2,228 | 897 | 341 | 448 | 2,243 |
| 1902 | 2,780 | 1,638 | 6,639 | 2,203 | 780 | 406 | 505 | 1,065 | 885 | 4,546 | 2,511 | 4,497 |
| 1903 | 2,398 | 2,674 | 3,982 | 3,337 | 488 | 1,713 | 860 | 960 | 747 | 5,613 | 894 | 1,583 |
| 1904 | 1,087 | 1,350 | 2,821 | 1,466 | 580 | 495 | 206 | 556 | 1,096 | 944 | 767 | 531 |
| 1905 | 2,448 | 813 | 3,676 | 1,660 | 432 | 265 | 131 | 271 | 845 | 435 | 269 | 1,941 |
| 1906 | 1,766 | 780 | 2,218 | 3,044 | 1,046 | 1,107 | 902 | 856 | 212 | 371 | 516 | 706 |
| 1907 | 1,640 | 417 | 2,864 | 1,628 | 1,573 | 807 | 233 | 148 | 781 | 1,863 | 4,757 | 3,680 |
| 1908 | 3,286 | 3,487 | 3,115 | 1,182 | 3,169 | 1,123 | 342 | 364 | 184 | 207 | 240 | 385 |
| 1909 | 926 | 2,463 | 2,215 | 3,021 | 1,883 | 513 | 187 | 295 | 142 | 129 | 179 | 622 |
| 1910 | 1,548 | 1,805 | 3,006 | 2,414 | 1,543 | 1,258 | 211 | 155 | 141 | 108 | 325 | 286 |
| 1911 | 848 | 928 | 1,428 | 2,280 | 473 | 906 | 204 | 254 | 558 | 1,563 | 1,598 | 1,397 |
| 1912 | 587 | 1,000 | 4,343 | 2,311 | 1,774 | 423 | 151 | 248 | 288 | 527 | 1,359 | 1,259 |
| 1913 | 2,879 | 901 | 3,524 | 2,997 | 1,169 | 345 | 120 | 95.8 | 123 | 1,115 | 1,325 | 1,081 |
| 1914 | 1,487 | 1,409 | 2,567 | 2,898 | 1,692 | 265 | 303 | 143 | 78.2 | 98.4 | 308 | 977 |
| 1915 | 3,416 | 3,696 | 1,221 | 1,327 | 685 | 209 | 260 | 1,816 | 420 | 453 | 503 | 1,449 |
| 1916 | 2,376 | 1,903 | 2,122 | 2,975 | 1,212 | 1,266 | 797 | 609 | 175 | 149 | 189 | 708 |
| 1917 | 1,302 | 682 | 2,431 | 1,683 | 1,054 | 798 | 340 | 75.4 | 63.8 | 299 | 327 | 286 |
| 1918 | 460 | 2,217 | 2,474 | 1,620 | 1,005 | 488 | 135 | 105 | 117 | 57.1 | 148 | 695 |
| 1919 | 993 | 955 | 2,818 | 1,805 | 1,746 | 332 | 1,923 | 1,411 | 1,085 | 926 | 1,722 | 1,713 |
| 1920 | 600 | 487 | 6,086 | 3,182 | 1,474 | 788 | 1,213 | 1,288 | 613 | 1,188 | 1,142 | 2,708 |
| 1921 | 1,713 | 1,169 | 3,396 | 1,968 | 1,791 | 257 | 395 | 366 | 89.5 | 61 | 269 | 595 |
| 1922 | 190 | 1,235 | 3,074 | 1,986 | 1,734 | 1,340 | 1,363 | 374 | 457 | 152 | 129 | 235 |
| 1923 | 1,500 | 626 | 3,270 | 1,334 | 1,069 | 425 | 66.4 | 30.4 | 69.2 | 385 | 400 | 1,548 |
| 1924 | 2,266 | 993 | 1,625 | 3,894 | 2,839 | 656 | 563 | 117 | 241 | 655 | 230 | 521 |
| 1925 | 224 | 3,161 | 2,805 | 1,146 | 743 | 292 | 336 | 614 | 179 | 374 | 1,468 | 1,827 |
| 1926 | 735 | 1,564 | 2,893 | 1,611 | 388 | 176 | 172 | 623 | 925 | 689 | 2,176 | 1,128 |
| 1927 | 1,265 | 1,653 | 2,145 | 870 | 1,533 | 708 | 690 | 2,223 | 2,321 | 2,087 | 2,970 | 2,853 |
| 1928 | 1,105 | 2,541 | 1,660 | 1,870 | 1,306 | 1,323 | 1,968 | 1,636 | 1,351 | 268 | 245 | 373 |
| 1929 | 1,034 | 947 | 2,819 | 2,550 | 2,038 | 357 | 114 | 78.2 | 152 | 437 | 567 | 1,017 |
| 1930 | 1,137 | 1,016 | 1,756 | 1,233 | 447 | 579 | 265 | 110 | 124 | 44.5 | 506 | 315 |
| 1931 | 563 | 803 | 1,252 | 1,836 | 1,719 | 1,797 | 701 | 213 | 171 | 62.4 | 79.2 | 276 |
| 1932 | 947 | 1,010 | 1,076 | 1,966 | 591 | 166 | 139 | 47.9 | 32.4 | 518 | 3,580 | 1,091 |
| 1933 | 1,190 | 1,499 | 2,651 | 3,550 | 1,274 | 556 | 278 | 1,175 | 3,139 | 696 | 361 | 532 |
| 1934 | 1,650 | 364 | 1,958 | 3,019 | 1,579 | 789 | 193 | 131 | 1,081 | 1,530 | 982 | 1,818 |
| 1935 | 1,440 | 1,457 | 1,925 | 1,137 | 440 | 282 | 565 | 118 | 235 | 132 | 1,244 | 913 |
| 1936 | 2,053 | 651 | 6,755 | 2,965 | 825 | 654 | 198 | 170 | 152 | 464 | 278 | 1,754 |
| 1937 | 2,668 | 2,091 | 1,550 | 1,938 | 1,729 | 517 | 296 | 596 | 538 | 525 | 1,837 | 1,687 |
| 1938 | 2,023 | 1,860 | 1,230 | 1,429 | 716 | 1,011 | 2,542 | 1,181 | 2,068 | 836 | 737 | 2,455 |
| 1939 | 1,422 | 2,944 | 3,055 | 3,534 | 871 | 249 | 188 | 187 | 125 | 163 | 371 | 234 |
| 1940 | 536 | 587 | 2,452 | 3,878 | 1,643 | 1,937 | 513 | 293 | 828 | 363 | 1,560 | 1,348 |
| 1941 | 1,281 | 1,807 | 1,576 | 1,806 | 335 | 371 | 581 | 222 | 97.9 | 104 | 256 | 784 |
| 1942 | 716 | 1,474 | 2,771 | 1,137 | 545 | 295 | 348 | 2,859 | 1,081 | 1,369 | 1,864 | 1,950 |
| 1943 | 2,111 | 2,007 | 2,437 | 1,190 | 1,315 | 821 | 277 | 109 | 136 | 642 | 1,454 | 317 |
| 1944 | 874 | 1,074 | 2,446 | 2,832 | 1,032 | 312 | 96.5 | 76.5 | 261 | 99.6 | 776 | 1,407 |
| 1945 | 1,005 | 882 | 3,057 | 1,298 | 2,474 | 956 | 3,124 | 1,617 | 1,361 | 641 | 1,395 | 2,506 |
| 1946 | 2,107 | 618 | 1,663 | 773 | 1,860 | 1,743 | 907 | 544 | 576 | 636 | 287 | 382 |
| 1947 | 990 | 728 | 2,025 | 2,018 | 2,764 | 1,618 | 810 | 370 | 205 | 175 | 2,119 | 683 |
| 1948 | 662 | 1,306 | 3,036 | 2,219 | 2,247 | 1,750 | 713 | 553 | 90.3 | 118 | 267 | 634 |
| 1949 | 3,557 | 1,836 | 1,275 | 1,666 | 1,153 | 175 | 120 | 80.4 | 140 | 126 | 123 | 375 |
| 1950 | 510 | 1,219 | 1,686 | 1,016 | 872 | 827 | 588 | 173 | 182 | 187 | 750 | 2,607 |
| 1951 | 1,613 | 2,572 | 2,501 | 3,668 | 856 | 787 | 520 | 786 | 182 | 465 | 2,139 | 2,499 |
| 1952 | 2,626 | 2,287 | 3,285 | 3,169 | 2,298 | 2,919 | 648 | 785 | 1,266 | 239 | 1,172 | 2,167 |
| 1953 | 2,806 | 1,690 | 3,668 | 3,350 | 1,652 | 379 | 241 | 75.2 | 54.8 | 113 | 201 | 1,019 |
| 1954 | 412 | 604 | 1,265 | 712 | 1,342 | 159 | 60.3 | 123 | 837 | 217 | 1,403 | 1,555 |
| 1955 | 817 | 1,174 | 1,633 | 890 | 417 | 306 | 123 | 2,664 | 350 | 3,045 | 2,130 | 448 |
| 1956 | 371 | 1,419 | 1,661 | 2,625 | 1,298 | 392 | 474 | 177 | 463 | 266 | 951 | 1,524 |
| 1957 | 622 | 992 | 1,235 | 2,375 | 550 | 152 | 89.7 | 47.8 | 126 | 110 | 164 | 1,802 |
| 1958 | 2,033 | 1,166 | 3,129 | 3,459 | 2,239 | 290 | 206 | 180 | 231 | 789 | 755 | 852 |
| 1959 | 601 | 664 | 1,274 | 1,187 | 563 | 451 | 205 | 459 | 264 | 751 | 866 | 1,629 |
| 1960 | 1,695 | 2,072 | 1,103 | 2,624 | 927 | 351 | 413 | 1,200 | 2,057 | 547 | 519 | 595 |
| 1961 | 827 | 1,755 | 3,510 | 3,147 | 1,373 | 398 | 390 | 357 | 180 | 151 | 290 | 442 |
| 1962 | 834 | 443 | 2,298 | 1,713 | 312 | 221 | 116 | 182 | 195 | 418 | 1,018 | 620 |
| 1963 | 427 | 440 | 2,197 | 454 | 375 | 203 | 170 | 103 | 96.6 | 91 | 579 | 466 |
| 1964 | 1,458 | 951 | 1,136 | 1,642 | 609 | 273 | 181 | 64.2 | 28.9 | 73.6 | 114 | 354 |
| 1965 | 250 | 1,062 | 497 | 364 | 227 | 84.6 | 61.6 | 99.5 | 106 | 230 | 130 | 205 |
| 1966 | 230 | 957 | 1,296 | 331 | 627 | 189 | 88.5 | 66.2 | 418 | 470 | 519 | 565 |
| 1967 | 1,042 | 1,029 | 3,138 | 1,435 | 1,564 | 374 | 611 | 1,248 | 291 | 394 | 540 | 1,826 |
| 1968 | 824 | 979 | 1,943 | 840 | 1,482 | 3,338 | 333 | 177 | 195 | 150 | 384 | 726 |
| 1969 | 398 | 448 | 1,512 | 1,327 | 603 | 512 | 585 | 1,534 | 526 | 337 | 761 | 1,276 |
| 1970 | 489 | 2,912 | 904 | 2,756 | 572 | 344 | 195 | 221 | 120 | 311 | 1,120 | 598 |
| 1971 | 531 | 1,953 | 3,104 | 1,383 | 875 | 401 | 223 | 1,332 | 3,561 | 903 | 1,372 | 1,557 |
| 1972 | 967 | 1,201 | 3,064 | 1,399 | 2,628 | 4,290 | 1,923 | 270 | 230 | 447 | 3,206 | 3,337 |
| 1973 | 1,836 | 3,787 | 1,590 | 3,508 | 2,424 | 1,092 | 1,805 | 983 | 274 | 364 | 707 | 3,391 |
| 1974 | 1,813 | 1,196 | 1,656 | 3,009 | 1,213 | 624 | 221 | 337 | 995 | 611 | 492 | 1,700 |
| 1975 | 1,806 | 1,700 | 2,409 | 1,351 | 1,340 | 1,372 | 2,567 | 749 | 1,956 | 2,413 | 1,661 | 1,065 |
| 1976 | 1,913 | 2,269 | 1,219 | 1,174 | 933 | 481 | 764 | 378 | 315 | 738 | 472 | 515 |
| 1977 | 283 | 864 | 3,549 | 2,026 | 703 | 465 | 156 | 199 | 366 | 636 | 2,414 | 2,477 |
| 1978 | 2,960 | 1,184 | 3,000 | 1,878 | 2,530 | 776 | 273 | 853 | 336 | 184 | 288 | 903 |
| 1979 | 4,039 | 1,598 | 3,245 | 1,717 | 2,224 | 1,256 | 255 | 366 | 1,336 | 1,064 | 1,199 | 1,088 |
| 1980 | 926 | 368 | 2,674 | 4,249 | 1,535 | 350 | 229 | 147 | 80.8 | 135 | 200 | 111 |
| 1981 | 104 | 1,282 | 423 | 548 | 1,404 | 324 | 332 | 134 | 215 | 234 | 224 | 606 |
| 1982 | 1,274 | 1,593 | 869 | 1,603 | 934 | 1,486 | 536 | 337 | 229 | 184 | 394 | 434 |
| 1983 | 916 | 1,257 | 4,318 | 5,760 | 1,736 | 1,343 | 281 | 202 | 136 | 521 | 968 | 3,731 |
| 1984 | 905 | 1,998 | 2,373 | 5,445 | 2,127 | 2,533 | 2,473 | 359 | 248 | 299 | 376 | 638 |
| 1985 | 458 | 675 | 478 | 228 | 564 | 514 | 256 | 213 | 438 | 555 | 1,560 | 1,474 |
| 1986 | 1,164 | 2,163 | 1,828 | 2,399 | 756 | 511 | 338 | 913 | 289 | 249 | 1,363 | 2,190 |
| 1987 | 1,298 | 796 | 1,481 | 3,623 | 798 | 339 | 573 | 459 | 901 | 901 | 1,109 | 1,131 |
| 1988 | 654 | 1,471 | 1,230 | 452 | 1,630 | 403 | 622 | 336 | 293 | 154 | 1,131 | 460 |
| 1989 | 522 | 504 | 623 | 1,611 | 4,554 | 1,636 | 627 | 410 | 1,163 | 1,818 | 1,351 | 407 |
| 1990 | 1,047 | 1,742 | 1,046 | 1,276 | 2,556 | 1,069 | 562 | 1,448 | 391 | 1,067 | 979 | 2,056 |
| 1991 | 1,747 | 1,035 | 1,883 | 1,418 | 1,012 | 217 | 228 | 295 | 328 | 153 | 336 | 601 |
| 1992 | 591 | 386 | 1,099 | 955 | 451 | 2,095 | 460 | 459 | 421 | 206 | 1,023 | 1,666 |
| 1993 | 1,607 | 846 | 2,684 | 3,671 | 670 | 154 | 126 | 162 | 189 | 168 | 270 | 1,487 |
| 1994 | 825 | 1,665 | 3,473 | 2,775 | 910 | 222 | 537 | 506 | 182 | 97 | 319 | 730 |
| 1995 | 1,253 | 640 | 1,296 | 474 | 303 | 141 | 319 | 131 | 78.6 | 519 | 2,217 | 516 |
| 1996 | 2,716 | 2,312 | 1,995 | 2,338 | 1,568 | 657 | 1,404 | 319 | 513 | 2,363 | 1,127 | 4,255 |
| 1997 | 1,358 | 1,479 | 1,308 | 2,304 | 1,227 | 288 | 375 | 316 | 300 | 122 | 401 | 663 |
| 1998 | 1,744 | 2,090 | 2,136 | 2,252 | 2,824 | 1,462 | 259 | 145 | 143 | 201 | 56.5 | 44.8 |
| 1999 | 1,053 | 852 | 2,106 | 936 | 411 | 64.5 | 67.6 | 168 | 2,219 | 656 | 588 | 802 |
| 2000 | 695 | 944 | 1,486 | 1,452 | 1,057 | 1,113 | 797 | 1,390 | 418 | |||