Data is updated every year about October/November time period



Thomaston Dam, Naugatuck River
Peak Pool Levels
by Water Year
(1961 - Present)
Drainage Area:  97 sq. miles
Normal Pool:  0 ft.
Gate Invert Elev.:  380 ft. NGVD
1" Runoff =   5,173 ac-ft
Storage at Spillway Crest:   8.1 in. / 42,000 ac-ft



Date
Annual Peak
Pool Level (ft)
Storage Utilized
Inches Acre-Feet Percent
27 Feb 1961 52.7 1.1 5,528 13
02 Apr 1962 41.2 0.6 2,963 7
27 Mar 1963 36.1 0.4 2,103 5
26 Jan 1964 40.0 0.5 2,739 7
09 Feb 1965 29.7 0.2 1,252 3
02 Mar 1966 23.0 0.1 593 1
19 Apr 1967 36.8 0.4 2,217 5
20 Mar 1968 58.9 1.4 7,393 18
25 Apr 1969 60.0 1.5 7,746 18
     
05 Apr 1970 59.0 1.4 7,425 18
15 May 1971 34.0 0.3 1,806 4
01 Jul 1972 46.6 0.8 4,042 10
04 Feb 1973 60.0 1.5 7,746 18
21 Dec 1973 68.9 2.2 11,199 27
28 Sep 1975 68.7 2.1 11,111 26
29 Jan 1976 65.0 1.9 9,596 23
14 Mar 1977 44.5 0.7 3,593 9
27 Jan 1978 55.2 1.2 6,236 15
08 Mar 1979 75.0 2.7 14,022 33
     
23 Mar 1980 69.9 2.2 11,642 28
24 Feb 1981 64.0 1.8 9,194 22
08 Jun 1982 75.4 2.7 14,215 34
22 Mar 1983 68.0 2.1 10,801 26
03 Jun 1984 87.2 4.0 20,821 50
28 Sep 1985 47.5 0.8 4,235 10
28 Jan 1986 56.4 1.3 6,591 16
06 Apr 1987 75.6 2.8 14,312 34
16 May 1988 19.7 0.1 357 1
08 May 1989 47.5 0.8 4,235 10
     
22 Oct 1989 70.7 2.3 11,996 29
25 Oct 1990 44.4 0.7 3,572 9
28 Mar 1992 40.4 0.5 2,814 7
30 Mar 1993 50.1 0.9 4,861 12
06 Dec 1993 36.6 0.4 2,185 5
25 Dec 1994 32.8 0.3 1,637 4
28 Jan 1996 59.9 1.5 7,714 18
21 Oct 1996 65.6 1.9 9,837 23
10 Mar 1998 47.4 0.8 4,214 10
18 Sep 1999 56.7 1.3 6,691 16
     
02 Oct 1999 34.8 0.4 1,916 5
01 Apr 2001 46.8 0.8 4,081 10
07 Jun 2002 36.8 0.4 2,217 5
29 Sep 2003 40.7 0.6 2,866 7
26 Dec 2003 41.8 0.6 2,900 7
04 Apr 2005 49.0 0.9 4,600 11
15 Oct 2005 72.6 2.5 13,000 31
17 Apr 2007 78.9 3.1 16,011 38
10 Mar 2008 58.7 1.4 7,317 17
12 Dec 2008 48.4 0.9 4,430 10
     
31 Mar 2010 60.2 1.5 7,818 19
29 Aug 2011 83.8 3.6 18,750 45
08 Dec 2011 38.7 0.5 2,518 6
14 Jun 2013 48.6 0.9 4,482 10
01 May 2014 42.9 0.6 3,281 7
10 Dec 2014 37.1 0.4 2,259 6
25 Feb 2016 42.4 0.6 3,175 7
07 Apr 2017 27.6 0.2 1,008 3
13 Jan 2018 43.3 0.6 3,349 8
22 Dec 2018 50.7 1.0 4,985 12
     
15 Dec 2019 40.7 0.6 2,850 7
03 Sep 2021 65.7 1.9 9,841 23