River Flow Flathead River Near Polson MT
Year	Avg Annual (AF)		Year	Avg Annual (AF)		Year	Avg Annual (AF)
1911	7,984,607		1941	4,424,785		1971	10,457,429
1912	7,389,849		1942	7,262,680		1972	10,357,232
1913	9,713,128		1943	9,934,296		1973	6,078,354
1914	7,130,394		1944	4,070,462		1974	12,055,822
1915	5,859,483		1945	6,411,355		1975	8,921,999
1916	11,874,254		1946	9,093,849		1976	9,448,311
1917	8,719,174		1947	10,382,898		1977	5,468,944
1918	8,819,944		1948	9,405,388		1978	8,222,249
1919	6,114,458		1949	7,456,690		1979	7,593,326
1920	7,072,883		1950	11,219,199		1980	6,607,013
10 year avg (AF)	8,067,817		10 year avg (AF)	7,966,160		10 year avg (AF)	8,521,068
1921	9,860,139		1951	11,418,238		1981	9,199,124
1922	7,728,506		1952	7,776,634		1982	8,395,717
1923	8,450,317		1953	7,043,597		1983	8,174,004
1924	7,293,750		1954	10,221,441		1984	7,062,874
1925	11,154,441		1955	8,265,037		1985	8,042,938
1926	6,196,210		45 year avg (AF)	7,646,423		1986	7,584,152
1927	Incomplete Data		1956	10,646,636		1987	6,251,276
1928	Incomplete Data		1957	7,879,115		1988	5,695,417
1929	6,402,635		1958	6,264,276		1989	7,819,935
1930	6,148,334		1959	12,584,013		1990	9,834,498
10 year avg (AF)	7,904,292		1960	9,075,477		10 year avg (AF)	7,805,994
1931	5,390,085		10 year avg (AF)	9,117,446		1991	10,909,958
1932	8,991,475		1961	9,328,839		1992	5,989,445
1933	11,119,581		1962	8,237,772		1993	7,274,518
1934	10,319,817		1963	7,279,480		1994	5,577,454
1935	7,904,423		1964	9,987,868		1995	7,281,404
1936	6,867,666		1965	11,098,528		1996	11,959,390
1937	5,922,158		1966	8,924,971		1997	11,710,464
1938	7,040,490		1967	9,238,337		1998	6,841,336
1939	7,303,974		1968	7,977,608		1999	7,920,202
1940	4,930,317		1969	9,547,837		2000	7,336,223
10 year avg (AF)	7,578,999		1970	7,695,058		10 year avg (AF)	9,263,489
			10 year avg (AF)	8,931,630		45 year avg (AF)	8,485,263
						90 year avg (AF)	8,065,843