Data is updated every year about October/November time period



Blackwater Dam, Blackwater River
Peak Pool Levels
by Water Year
(1941 - Present)
Drainage Area:  128 sq. miles
Normal Pool:  516 ft. NGVD
Gate Invert Elev.:  515 ft. NGVD
1" Runoff =   6,827 ac-ft
Storage at Spillway Crest:   6.7 in. / 46,000 ac-ft



Date
Annual Peak
Pool Level (ft)
Storage Utilized
Inches Acre-Feet Percent
1941        
1942        
1943        
27 Jun 1944 538.4 0.4 2,808 6
23 Mar 1945 540.0 0.5 3,340 7
09 Dec 1945 538.8 0.4 2,936 6
14 Apr 1947 540.8 0.5 3,644 8
24 Mar 1948 544.0 0.8 5,340 12
02 Jan 1949 533.8 0.2 1,558 3
     
07 Apr 1950 539.3 0.5 3,102 7
05 Apr 1951 553.2 2.3 15,900 35
09 Apr 1952 551.2 1.9 12,880 28
31 Mar 1953 560.0 4.4 30,300 66
13 May 1954 549.0 1.4 9,800 21
15 Aug 1955 534.3 0.2 1,672 4
02 May 1956 548.1 1.3 8,756 19
01 Mar 1957 521.4 0.0 126 0
25 Apr 1958 544.5 0.8 5,680 12
06 Apr 1959 546.9 1.1 7,553 16
     
08 Apr 1960 554.0 2.5 17,300 38
24 Apr 1961 529.0 0.1 770 2
04 Apr 1962 547.7 1.2 8,340 18
08 Oct 1962 542.0 0.6 4,180 9
17 Apr 1964 545.9 1.0 6,695 15
19 Apr 1965 527.5 0.1 588 1
28 Mar 1966 532.4 0.2 1,276 3
05 Apr 1967 544.8 0.9 5,884 13
25 Mar 1968 548.8 1.4 9,568 21
24 Apr 1969 561.5 5.0 34,250 74
     
13 Feb 1970 540.2 0.5 3,416 7
05 May 1971 533.5 0.2 1,495 3
06 May 1972 539.3 0.5 3,102 7
03 Jul 1973 549.0 1.4 9,800 21
24 Dec 1973 542.0 0.6 4,180 9
22 Mar 1975 538.0 0.4 2,680 6
04 Apr 1976 543.7 0.8 5,154 11
16 Mar 1977 551.7 2.0 13,580 30
18 May 1978 536.0 0.3 2,100 5
27 Mar 1979 544.5 0.8 5,680 12
     
12 Apr 1980 540.5 0.5 3,530 8
27 Feb 1981 547.0 1.1 7,640 17
20 Apr 1982 542.0 0.6 4,180 9
22 Mar 1983 547.4 1.2 8,040 17
05 Jun 1984 556.3 3.2 21,800 47
15 Mar 1985 533.8 0.2 1,558 3
30 Jan 1986 547.0 1.1 7,640 17
09 Apr 1987 564.1 6.0 40,860 89
01 May 1988 541.0 0.5 3,720 8
09 Apr 1989 543.0 0.7 4,720 10
     
13 Aug 1990 545.2 0.9 6,170 13
03 May 1991 539.0 0.4 3,000 7
29 Mar 1992 538.5 0.4 2,840 6
15 Apr 1993 550.0 1.6 11,150 24
11 Apr 1994 541.5 0.6 3,950 9
23 Apr 1995 540.1 0.5 3,378 7
19 Apr 1996 550.0 1.6 11,208 24
24 Oct 1996 550.1 1.6 11,237 24
02 Apr 1998 548.0 1.3 8,675 19
19 Sep 1999 541.3 0.6 3,840 8
     
11 Apr 2000 541.2 0.6 3,826 8
27 Apr 2001 549.6 1.5 10,570 23
17 Apr 2002 539.0 0.4 3,000 7
30 Mar 2003 540.2 0.5 3,410 7
04 Apr 2004 544.9 0.9 5,966 13
05 Apr 2005 549.0 1.4 9,800 21
18 May 2006 562.9 5.6 38,200 83
20 Apr 2007 554.6 2.7 18,440 40
20 Apr 2008 543.3 0.7 4,906 11
08 Apr 2009 542.0 0.6 4,191 9
     
02 Apr 2010 546.6 1.1 7,316 16
19 Apr 2011 544.1 0.8 5,400 12
21 Apr 2012 531.9 0.2 1,190 3
21 Apr 2013 534.0 0.2 1,612 3
17 Apr 2014 538.6 0.4 2,872 7
18 Apr 2015 536.6 0.3 2,262 5
23 Apr 2016 535.8 0.3 2,053 5
09 Apr 2017 538.0 0.4 2,686 6
01 Nov 2017 542.8 0.7 4,617 10
29 Apr 2019 542.4 0.6 4,364 9
     
12 Apr 2020 532.6 0.2 1,306 3
27 Dec 2020 543.0 0.7 4,736 10