River Flow Clark Fork at Plains













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USGS Clark Fork Near Plains
Year  Avg Annual (AF)    Year  Avg Annual (AF)  Year  Avg Annual (AF) 
1911          13,935,095 1941               7,303,190 1971             18,227,999
1912          13,766,340 1942             12,092,690 1972             19,366,220
1913          17,405,335 1943             17,827,312 1973               9,348,542
1914          12,940,821 1944               7,449,142 1974             20,161,548
1915          10,972,214 1945             10,510,472 1975             17,004,636
1916          20,254,893 1946             14,203,578 1976             17,737,036
1917          17,490,665 1947             17,718,957 1977               8,358,136
1918          17,160,460 1948             17,945,962 1978             15,187,038
1919          10,340,607 1949             13,517,236 1979             13,218,500
1920          13,481,240     1950             18,736,398 1980             13,424,493
10 year avg (AF)          14,774,767  10 year avg (AF)              13,730,494 10 year avg (AF)             15,203,415
1921          15,922,216 1951             18,837,284 1981             15,829,504
1922          13,946,502 1952             13,414,817 1982             16,090,019
1923          14,158,061 1953             12,671,042 1983             13,286,984
1924          11,526,364 1954             16,535,049 1984             12,781,949
1925          17,698,038 1955             14,202,283 1985             12,988,859
1926          10,024,788 45 year Avg (AF)             15,123,146 1986             13,694,753
1927          20,293,339 1956             18,915,457 1987               9,665,463
1928          19,481,230 1957             13,920,319 1988               9,232,653
1929          10,368,890 1958             12,658,704 1989             13,195,207
1930          10,355,970     1959             20,484,328 1990             15,418,159
10 year avg (AF)          14,377,540 1960             14,487,684 10 year avg (AF)             13,218,355
1931            7,909,706 10 year avg (AF)             13,564,270 1991             16,430,119
1932          14,126,336 1961             14,472,818 1992               9,331,744
1933          17,794,062 1962             14,626,494 1993             12,212,204
1934          16,655,140 1963             12,543,472 1994               9,254,797
1935          12,043,437 1964             16,773,154 1995             12,996,423
1936          11,583,446 1965             19,222,868 1996             20,186,811
1937            8,904,145 1966             13,285,125 1997             21,173,467
1938          12,463,344 1967             15,870,411 1998             12,335,687
1939          11,393,878 1968             14,013,430 1999             13,963,423
1940            8,190,419     1969             16,623,405 2000             11,259,636
10 year avg (AF)          12,106,391 1970             14,289,981 10 year avg (AF)             16,778,083
      10 year avg (AF)             15,172,116 45 year avg (AF)             15,837,951
            90 year avg (AF)             15,480,549