Data is updated every year about October/November time period



West Thompson Dam, Quinebaug River
Peak Pool Levels
by Water Year
(1967 - Present)
Drainage Area (gross):  172 sq. miles
Drainage Area (net):  74 sq. miles
Normal Pool:  15 ft.
Gate Invert Elev.:  292 ft. NGVD
1" Runoff =   3,947 ac-ft
Storage at Spillway Crest:   6.5 in. / 25,600 ac-ft



Date
Annual Peak
Pool Level (ft)
Storage Utilized
Inches Acre-Feet Percent
28 May 1967 22.7 0.7 2,921 11
21 Mar 1968 37.5 3.1 12,250 48
27 Mar 1969 23.0 0.8 3,030 12
     
12 Feb 1970 35.0 2.6 10,200 40
17 Mar 1971 17.0 0.2 960 4
20 Mar 1972 31.0 1.9 7,500 29
04 Feb 1973 27.1 1.3 5,056 20
22 Dec 1973 23.3 0.8 3,171 12
20 Mar 1975 18.9 0.4 1,564 6
29 Jan 1976 32.7 2.2 8,605 34
15 Mar 1977 27.8 1.4 5,448 21
28 Jan 1978 31.5 2.0 7,825 31
27 Jan 1979 35.9 2.8 10,920 43
     
24 Mar 1980 29.3 1.6 6,395 25
26 Feb 1981 30.0 1.7 6,850 27
08 Jun 1982 36.0 2.8 11,000 43
22 Apr 1983 29.1 1.6 6,265 24
04 Jun 1984 38.9 3.4 13,510 53
14 Mar 1985 16.3 0.2 792 3
16 Mar 1986 24.0 0.9 3,500 14
08 Apr 1987 40.9 3.9 15,255 60
25 Jul 1988 18.7 0.4 1,492 6
14 Aug 1989 25.4 1.1 4,200 16
     
23 Oct 1989 26.5 1.2 4,750 19
21 Aug 1991 19.8 0.5 1,880 7
25 Nov 1991 20.9 0.6 2,265 9
02 Apr 1993 26.8 1.2 4,900 19
12 Mar 1994 20.0 0.5 1,950 8
10 Mar 1995 17.1 0.3 988 4
19 Apr 1996 32.3 2.1 8,319 32
22 Oct 1996 21.3 0.6 2,402 9
11 Mar 1998 28.7 1.5 6,002 23
25 Jan 1999 20.6 0.5 2,164 8
     
23 Apr 2000 22.4 0.7 2,800 11
31 Mar 2001 22.8 0.8 2,972 12
08 Jun 2002 19.0 0.4 1,564 6
23 Mar 2003 20.5 0.5 2,118 8
16 Apr 2004 26.0 1.2 4,700 18
04 Apr 2005 26.1 1.2 4,700 18
17 Oct 2005 41.3 3.9 15,400 60
18 Apr 2007 30.1 1.8 6,915 27
10 Mar 2008 28.2 1.4 5,688 22
14 Dec 2008 32.1 2.1 8,241 32
     
01 Apr 2010 37.1 3.0 11,890 46
09 Mar 2011 34.7 2.5 9,990 39
09 Dec 2011 19.2 0.4 1,653 6
09 Jun 2013 22.6 0.7 2,869 11
01 Apr 2014 27.8 1.4 5,465 22
06 Apr 2015 18.7 0.4 1,492 6
26 Feb 2016 19.9 0.5 1,929 8
08 Apr 2017 18.7 0.4 1,474 6
15 Jan 2018 21.3 0.6 2,401 9
26 Jan 2019 23.7 0.9 3,359 13
     
16 Dec 2019 19.9 0.5 1,904 7
03 Sep 2021 28.6 1.5 5,944 23