Data is updated every year about October/November time period



Mansfield Hollow Dam, Natchaug River
Peak Project Releases
by Water Year
(1952 - Present)
Drainage Area:  159 sq. miles
Normal Pool:  16.5 ft. (Summer), 15 ft. (Winter)
Gate Invert Elev.:  195 ft. NGVD
1" Runoff =   8,480 ac-ft
Storage at Spillway Crest:   5.8 in. / 52,000 ac-ft


Date Annual Peak
Release (cfs)
02 Jun 1952 2,950
18 Mar 1953 2,880
15 Sep 1954 2,150
27 Aug 1955 3,250
19 Oct 1955 3,230
07 Apr 1957 1,440
30 Jan 1958 1,990
07 Apr 1959 2,300 1
  
02 Apr 1960 2,210
28 Feb 1961 2,450
02 Apr 1962 2,210
29 Mar 1963 1,450
16 Apr 1964 1,520
27 Feb 1965 875
15 Feb 1966 1,220
29 May 1967 1,840
23 Mar 1968 2,310
25 Apr 1969 2,160
  
16 Feb 1970 2,440
01 Mar 1971 1,280
10 Mar 1972 2,530
06 Feb 1973 2,710
22 Mar 1974 2,570
21 Mar 1975 2,450
03 Feb 1976 2,620
15 Mar 1977 2,830
30 Jan 1978 2,690
29 Jan 1979 3,500
  
25 Mar 1980 2,550
27 Feb 1981 2,800
10 Jun 1982 2,710
28 Apr 1983 2,680
06 Jun 1984 2,500 1
07 Sep 1985 1,190
30 Jan 1986 2,200
10 Apr 1987 2,810
28 Mar 1988 1,410
14 Aug 1989 2,660
  
25 Oct 1989 2,460
22 Apr 1991 1,760
27 Nov 1991 1,550
05 Apr 1993 2,630
30 Mar 1994 2,250
18 Jun 1995 1,140
31 Jan 1996 2,920
03 Dec 1996 2,260
12 Mar 1998 2,980
04 Feb 1999 2,147
  
24 Apr 2000 2,450
23 Mar 2001 2,430
14 May 2002 1,800
27 May 2003 1,789
15 Apr 2004 2,697
04 Apr 2005 2,380
18 Oct 2005 2,880
19 Apr 2007 2,750
10 Mar 2008 2,670
15 Dec 2008 2,795
  
02 Apr 2010 2,750
09 Mar 2011 2,895
09 Dec 2011 2,590
16 Jun 2013 2,630
01 Apr 2014 2,440
10 Dec 2014 1,440
25 Feb 2016 1,620
05 Apr 2017 1,810
27 Sep 2018 2,650
16 Apr 2019 1,987
  
14 Apr 2020 2,124
28 Dec 2020 2,811

Notes:
1.    Estimated Release