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Numerical data in tables

Ranking of Water Years
(1960-2015) at Lower Granite Dam

Data Ranking
NW River Forecast Center

SNAKE - LOWER GRANITE DAM   (LGDW1)
Period Rankings - 1960 to 2015
APR-AUG Normal -- 21091 (KAF)
Rank Year Period Volume
(KAF)
Percent of Normal Exceedance
Probability*
1 1974 36344.00 172 1.786 %
2 1997 36205.00 172 3.571 %
3 1971 35391.00 168 5.357 %
4 2011 35002.00 166 7.143 %
5 1984 34679.00 164 8.929 %
6 1982 32847.00 156 10.714 %
7 1965 31884.00 151 12.500 %
8 1972 31292.00 148 14.286 %
9 1975 30735.00 146 16.071 %
10 1976 30028.00 142 17.857 %
11 1996 29887.00 142 19.643 %
12 1999 27524.00 131 21.429 %
13 1983 27362.00 130 23.214 %
14 1964 27275.00 129 25.000 %
15 2006 26378.00 125 26.786 %
16 1998 25158.00 119 28.571 %
17 1969 25035.00 119 30.357 %
18 2009 24718.00 117 32.143 %
19 1986 24642.00 117 33.929 %
20 2008 24642.00 117 35.714 %
21 1970 24164.00 115 37.500 %
22 1978 23938.00 113 39.286 %
23 2012 23738.00 113 41.071 %
24 1993 23396.00 111 42.857 %
25 1995 23004.00 109 44.643 %
26 1967 22386.00 106 46.429 %
27 1962 21470.00 102 48.214 %
28 1980 21466.00 102 50.000 %
29 2014 20780.00 99 51.786 %
30 1985 20255.00 96 53.571 %
31 1963 20036.00 95 55.357 %
32 2002 19722.00 94 57.143 %
33 1989 19571.00 93 58.929 %
34 1981 19534.00 93 60.714 %
35 2010 19500.00 92 62.500 %
36 2000 18465.00 88 64.286 %
37 2003 18299.00 87 66.071 %
38 1979 18272.00 87 67.857 %
39 1961 17849.90 85 69.643 %
40 2004 16753.00 79 71.429 %
41 1990 16658.00 79 73.214 %
42 1968 16456.00 78 75.000 %
43 1991 16312.00 77 76.786 %
44 2005 14750.00 70 78.571 %
45 2013 14716.00 70 80.357 %
46 1966 14583.00 69 82.143 %
47 2007 13479.00 64 83.929 %
48 1988 13430.00 64 85.714 %
49 1973 12602.00 60 87.500 %
50 1994 12545.00 59 89.286 %
51 2015 11753.28 56 91.071 %
52 2001 11684.00 55 92.857 %
53 1987 11386.00 54 94.643 %
54 1992 9932.00 47 96.429 %
55 1977 9268.00 44 98.214 %

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

Related Links:
29 Dams in the Federal Columbia River Power System
Electricity in Idaho & the Northwest Electric Sales and Revenue 1999


Data Ranking
Ranking of Water Years (1960-2015) at Lower Granite Dam
NW River Forecast Center

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