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COLUMBIA - THE DALLES DAM   (TDAO3)
Period Rankings - 1960 to 2019
APR-AUG Normal -- 87532 (KAF)
Rank Year Period Volume
(KAF)
Percent of Normal Exceedance
Probability*
1 1974 134103.68 153 1.667 %
2 1997 132966.34 152 3.333 %
3 1972 128956.44 147 5.000 %
4 2011 127379.00 146 6.667 %
5 1971 121263.26 139 8.333 %
6 2012 119127.00 136 10.000 %
7 1982 115377.69 132 11.667 %
8 1976 114169.97 130 13.333 %
9 1999 111987.07 128 15.000 %
10 1996 111080.03 127 16.667 %
11 2017 109274.52 125 18.333 %
12 1965 108042.00 123 20.000 %
13 1969 107061.00 122 21.667 %
14 1984 104130.34 119 23.333 %
15 1967 103636.00 118 25.000 %
16 1964 103635.00 118 26.667 %
17 1975 102878.89 118 28.333 %
18 1991 101569.13 116 30.000 %
19 2018 101487.90 116 31.667 %
20 1983 101229.75 116 33.333 %
21 2006 97967.27 112 35.000 %
22 1961 97457.00 111 36.667 %
23 2002 95173.88 109 38.333 %
24 2014 94548.00 108 40.000 %
25 1990 94156.97 108 41.667 %
26 2008 93639.81 107 43.333 %
27 1978 92614.22 106 45.000 %
28 1998 91606.25 105 46.667 %
29 1981 91521.46 105 48.333 %
30 1962 90089.00 103 50.000 %
31 1986 88307.96 101 51.667 %
32 1995 87562.36 100 53.333 %
33 1980 87382.81 100 55.000 %
34 2013 87052.00 99 56.667 %
35 2000 85810.55 98 58.333 %
36 1989 83627.74 96 60.000 %
37 1970 83285.00 95 61.667 %
38 2019 82999.13 95 63.333 %
39 1993 82797.04 95 65.000 %
40 2009 82714.33 94 66.667 %
41 1963 82334.00 94 68.333 %
42 1966 82062.00 94 70.000 %
43 1968 81549.00 93 71.667 %
44 1985 80480.35 92 73.333 %
45 2007 79150.11 90 75.000 %
46 2016 78328.56 89 76.667 %
47 2010 77849.18 89 78.333 %
48 2003 75311.04 86 80.000 %
49 2004 73351.04 84 81.667 %
50 1979 72544.73 83 83.333 %
51 1988 68992.60 79 85.000 %
52 2005 68354.86 78 86.667 %
53 1994 68180.22 78 88.333 %
54 1987 66721.28 76 90.000 %
55 1973 61180.41 70 91.667 %
56 1992 60736.98 69 93.333 %
57 2015 58407.00 67 95.000 %
58 2001 53598.70 61 96.667 %
59 1977 49418.97 56 98.333 %

*Exceedance Probability: The probability that a specific seasonal volume will be exceeded.