Data is updated every year about October/November time period



Ball Mountain Dam, West River
Peak Pool Levels
by Water Year
(1962 - Present)
Drainage Area:  172 sq. miles
Normal Pool:  65 ft. (Summer), 35 ft. (Winter)
Gate Invert Elev.:  805.5 ft. NGVD
1" Runoff =   9,173 ac-ft
Storage at Spillway Crest:   5.9 in. / 54,450 ac-ft



Date
Annual Peak
Pool Level (ft)
Storage Utilized
Inches Acre-Feet Percent
10 Apr 1962 138.3 1.7 15,550 28
21 Apr 1963 116.7 1.1 9,668 18
16 Apr 1964 125.8 1.3 11,912 22
16 Apr 1965 87.0 0.5 4,414 8
24 Aug 1966 102.0 0.7 6,744 12
04 Apr 1967 120.2 1.1 10,509 19
25 Mar 1968 157.2 2.4 22,240 41
24 Apr 1969 198.0 4.8 44,220 81
     
27 Apr 1970 120.5 1.2 10,583 19
21 Apr 1971 98.0 0.7 6,068 11
08 May 1972 150.0 2.1 19,110 35
02 Jul 1973 177.8 3.5 31,772 58
22 Dec 1973 108.6 0.9 7,973 15
08 Aug 1975 96.0 0.6 5,736 11
11 Aug 1976 165.0 2.8 25,510 47
16 Mar 1977 151.8 2.2 20,144 37
10 Jan 1978 97.3 0.6 5,952 11
26 Mar 1979 142.4 1.8 16,852 31
     
11 Apr 1980 122.6 1.2 11,100 20
25 Feb 1981 169.2 3.0 27,484 50
21 Apr 1982 160.4 2.6 23,532 43
26 Apr 1983 123.3 1.2 11,272 21
03 Jun 1984 193.1 4.5 40,844 75
01 May 1985 104.4 0.8 7,157 13
21 Mar 1986 146.3 2.0 18,165 33
06 Apr 1987 213.9 SPILLWAY DISCHARGE
29 Apr 1988 126.7 1.3 12,163 22
07 Apr 1989 122.9 1.2 11,173 20
     
19 Mar 1990 124.1 1.2 11,395 21
22 Apr 1991 115.1 1.0 9,284 17
12 Mar 1992 101.4 0.7 6,641 12
02 Apr 1993 151.2 2.2 19,916 36
17 Apr 1994 156.9 2.4 22,120 41
17 Jan 1995 96.1 0.6 5,753 11
29 Jan 1996 145.0 1.9 17,710 32
07 Jan 1997 128.0 1.4 12,516 23
04 Apr 1998 174.4 3.3 29,972 55
18 Sep 1999 94.7 0.6 5,526 10
     
29 Mar 2000 115.9 1.0 9,486 17
26 Apr 2001 176.2 3.4 30,903 57
15 Apr 2002 95.4 0.6 5,570 10
31 Mar 2003 117.6 1.1 9,872 18
03 Apr 2004 126.1 1.3 12,160 22
04 Apr 2005 156.4 2.4 22,120 41
16 May 2006 116.5 1.0 9,500 17
18 Apr 2007 130.0 1.4 13,080 24
13 Apr 2008 126.9 1.3 12,218 22
26 Jun 2009 110.8 0.9 8,404 15
     
01 Apr 2010 147.5 2.0 18,588 34
30 Aug 2011 178.1 3.5 31,910 59
01 Oct 2011 74.4 0.3 2,900 5
30 Oct 2012 80.7 0.4 3,608 7
13 Jan 2014 99.9 0.7 6,387 12
26 Dec 2014 77.1 0.4 3,202 6
02 Oct 2015 75.6 0.3 3,030 5
13 Apr 2017 105.5 0.8 7,367 13
13 Jan 2018 94.2 0.6 5,450 10
16 Apr 2019 152.6 2.2 20,448 38
     
14 Apr 2020 89.9 0.5 4,824 9
26 Dec 2020 129.3 1.4 12,891 24

Notes:
1.    Spillway Discharge