Hopkinton Dam, Contoocook River
Peak Pool Levels
by Water Year
(1963 - Present)
Drainage Area (gross):  426 sq. miles
Drainage Area (net):  382 sq. miles
Normal Pool:  380 ft. NGVD(Summer), 382 ft. NGVD(Winter)
Gate Invert Elev.:  366 ft. NGVD
1" Runoff =   20,373 ac-ft
Storage at Spillway Crest:   6.5 in. / 70,100 ac-ft

Date	Annual Peak Pool Level (ft)	Storage Utilized
		Inches	Acre-Feet	Percent
08 Oct 1962	391.3	0.4	8,153	5
17 Apr 1964	395.8	0.7	14,732	10
17 Apr 1965	384.5	0.1	1,792	1
25 Mar 1966	387.5	0.2	3,915	3
05 Apr 1967	394.2	0.6	12,060	8
24 Mar 1968	402.0 1	1.4	34,430	21
20 Apr 1969	405.0 1	3.0	76,425	47
04 Apr 1970	391.0	0.4	7,790	5
14 Apr 1971	389.0	0.3	5,350	4
21 Apr 1972	390.5	0.3	7,120	5
05 Apr 1973	396.4	0.8	15,794	12
23 Dec 1973	393.9	0.6	11,610	8
04 Apr 1975	387.9	0.2	4,247	3
02 Apr 1976	389.5	0.3	5,900	4
19 Mar 1977	402.2 1	1.4	34,450	21
11 Jan 1978	388.0	0.2	4,330	3
11 Mar 1979	402.5 1	1.4	33,482	21
23 Mar 1980	392.5	0.5	9,675	7
28 Feb 1981	398.7	1.0	20,078	12
05 Apr 1982	392.7	0.5	9,945	7
23 Mar 1983	401.7 1	1.3	33,065	20
02 Jun 1984	407.5 1	4.0	100,525	62
15 Mar 1985	389.1	0.3	5,460	3
21 Mar 1986	398.5	1.0	19,672	13
08 Apr 1987	415.8 1	6.4	154,206	95
29 Mar 1988	394.5	0.6	12,525	8
11 Apr 1989	393.5	0.5	11,050	8
22 Mar 1990	397.2	0.8	17,212	11
22 Aug 1991	394.6	0.6	12,680	9
12 Mar 1992	389.8	0.3	6,230	4
14 Apr 1993	404.2 1	1.9	46,957	29
08 Apr 1994	389.9	0.3	6,340	4
25 Dec 1994	390.0	0.3	6,450	4
19 Apr 1996	403.3 1	1.5	36,950	23
23 Oct 1996	405.0 1	2.1	52,426	32
19 Jun 1998	403.3 1	1.4	36,302	22
17 Sep 1999	391.0	0.4	7,763	5
25 Apr 2000	391.8	0.4	8,770	5
25 Apr 2001	399.8	1.1	22,356	15
14 May 2002	387.6	0.2	3,990	3
31 Mar 2003	404.6 1	2.1	54,112	33
04 Apr 2004	402.5 1	1.5	36,349	22
05 Apr 2005	404.0 1	1.8	44,775	28
17 May 2006	407.5 1	4.2	99,450	64
18 Apr 2007	407.5 1	4.0	95,350	61
09 Mar 2008	390.7	0.3	7,388	5
14 Dec 2008	391.5	0.4	8,347	5
01 Apr 2010	406.3 1	3.5	83,470	54
13 Mar 2011	399.4	0.9	21,425	14
08 Dec 2011	389.1	0.2	5,427	3
11 Jun 2013	388.8	0.2	5,187	3
03 Apr 2014	393.6	0.5	11,134	8
24 Oct 2014	389.5	0.2	5,845	3
26 Feb 2016	388.5	0.2	4,850	3
11 Apr 2017	388.3	0.2	4,616	3
16 Jan 2018	394.0	0.5	11,806	17
10 Nov 2018	398.5	0.8	19,565	28
15 Dec 2019	386.8	0.1	3,346	5
28 Dec 2020	394.0	0.5	11,708	17

Notes:

1.    Combined storage event with Everett Dam

When pool levels exceed 401.0 at Hopkinton, storage is combined at Hopkinton-Everett