Data is updated every year about October/November time period



Everett Dam, Piscataquog River
Peak Pool Levels
by Water Year
(1963 - Present)
Drainage Area:  64 sq. miles
Normal Pool:  340.5 ft. NGVD
Gate Invert Elev.:  325 ft. NGVD
1" Runoff =   3,413 ac-ft
Storage at Spillway Crest:   6.8 in. / 91,500 ac-ft



Date
Annual Peak
Pool Level (ft)
Storage Utilized
Inches Acre-Feet Percent
09 Oct 1962 348.7 0.1 1,440 1
17 Apr 1964 348.2 0.1 1,340 1
20 Oct 1964 342.5 0.1 262 1
21 Mar 1966 344.5 0.1 562 1
21 Apr 1967 346.0 0.1 900 1
25 Mar 1968 366.4 1 1.4 34,430 21
25 Apr 1969 397.1 1 3.0 76,425 47
     
13 Feb 1970 360.3 0.2 4,811 3
15 Apr 1971 350.0 0.1 1,700 1
18 Apr 1972 347.1 0.1 1,120 1
20 Mar 1973 359.0 0.2 4,345 3
23 Dec 1973 351.0 0.1 1,950 1
05 Apr 1975 352.7 0.1 2,375 1
02 Apr 1976 349.5 0.1 1,600 1
17 Mar 1977 365.4 1 1.4 34,450 21
29 Jan 1978 350.4 0.1 1,800 1
12 Mar 1979 361.4 1 1.4 33,482 21
     
23 Mar 1980 351.4 0.1 2,050 1
27 Feb 1981 355.7 0.1 3,210 2
05 Apr 1982 352.5 0.1 2,325 1
22 Mar 1983 365.0 1 1.3 33,065 20
05 Jun 1984 405.5 1 4.2 100,525 62
15 Mar 1985 347.9 0.1 1,280 1
21 Mar 1986 362.2 0.2 5,580 3
09 Apr 1987 415.8 1 6.4 154,206 95
28 Mar 1988 348.9 0.1 1,480 1
10 Apr 1989 356.9 0.1 3,615 2
     
22 Mar 1990 358.5 0.1 4,172 2
27 Sep 1991 348.7 0.1 1,440 1
25 Nov 1991 346.7 0.1 1,040 1
19 Apr 1993 376.9 1 1.9 46,957 29
08 Apr 1994 350.2 0.1 1,750 1
27 Dec 1994 356.8 0.1 3,580 2
20 Apr 1996 365.2 1 1.5 36,950 23
25 Oct 1996 380.5 1 2.1 52,426 32
21 Jun 1998 363.9 1 1.4 36,302 22
18 Sep 1999 356.3 0.1 3,412 2
     
24 Apr 2000 352.4 0.1 2,298 1
18 Dec 2000 348.6 0.1 1,416 1
15 May 2002 345.9 0.1 900 1
02 Apr 2003 382.9 1 2.1 54,112 33
05 Apr 2004 368.0 1 1.5 36,349 22
06 Apr 2005 375.3 1 1.8 44,775 28
20 May 2006 405.3 1 4.2 99,450 64
23 Apr 2007 403.2 1 4.0 95,350 61
03 Apr 2008 354.8 0.1 2,940 2
08 Apr 2009 357.9 0.2 3,965 2
     
03 Apr 2010 398.9 1 3.5 83,470 54
09 Mar 2011 353.4 0.1 2,545 2
09 Dec 2011 351.3 0.1 2,035 1
13 Apr 2013 347.1 0.1 1,128 1
02 Apr 2014 352.7 0.1 2,365 1
12 Dec 2014 350.2 0.1 1,737 1
26 Feb 2016 346.0 0.1 910 1
08 Apr 2017 353.7 0.1 2,633 2
01 Nov 2017 355.4 0.1 3,132 3
05 Nov 2018 354.3 0.1 2,775 3
     
15 Dec 2019 347.4 0.0 1,178 1
20 Jul 2021 355.5 0.1 3,144 3

Notes:
1.    Combined storage event with Hopkinton Dam
When pool levels exceed 401.0 at Hopkinton, storage is combined at Hopkinton-Everett