Data is updated every year about October/November time period



Colebrook Dam, West Branch Farmington River
Peak Project Releases
by Water Year
(1969 - Present)
Drainage Area:  118 sq. miles
Normal Pool:  708 ft. NGVD (714.5 ft. Spring)
Gate Invert Elev.:  575 ft. NGVD
1" Runoff =   6,293 ac-ft
Storage at Spillway Crest:   8.0 in. / 50,200 ac-ft


Date Annual Peak
Release (cfs)
30 Jul 1969 1,550
  
20 May 1970 1,810
08 Mar 1971 574
07 Jul 1972 2,130
20 Mar 1973 1,220
21 Dec 1973 1,710
26 Sep 1975 3,090
05 Feb 1976 1,910
07 Apr 1977 1,750
12 Jan 1978 1,510
04 Jun 1979 1,360
  
21 Mar 1980 1,890
20 Feb 1981 1,110
24 Jun 1982 1,380
04 May 1983 2,470
11 Apr 1984 2,930
27 Sep 1985 2,500
05 Feb 1986 683
05 Apr 1987 2,050
16 Dec 1987 374
29 May 1989 1,240
  
11 Aug 1990 1,330
24 Oct 1990 1,070
08 Jun 1992 798
20 Apr 1993 2,740
18 Apr 1994 890
22 Apr 1995 470
01 Feb 1996 1,274
20 Mar 1997 1,700
15 Apr 1998 3,000
16 Sep 1999 1,200
  
15 Jun 2000 1,340
18 Apr 2001 1,360
13 May 2002 355
24 Jun 2003 1,140
24 Dec 2003 874
12 Apr 2005 1,930
25 Jan 2006 2,390
24 Apr 2007 3,000
14 Mar 2008 2,610
29 Dec 2008 884
  
03 Apr 2010 2,260
28 Aug 2011 3,150
07 Oct 2011 3,030
17 Jun 2013 2,930
06 May 2014 896
10 Dec 2014 673
25 Feb 2016 614
10 May 2017 867
18 Apr 2018 1,134
08 Nov 2018 1,309
  
01 May 2020 627
21 Jul 2021 2,400