|
Annual maximum and minimum reservoir elevations and dates as measured at the Smith
Mountain Dam.Spill occurs during periods when the reservoir elevation is above 795.0
feet.
| Year |
Maximum Elevation |
Maximum Date |
Other Spill Elevation |
Other Spill Date |
Minimun Elevation |
Minimun Date |
|
1966 |
795.00 |
|
|
|
FIRST FULL |
MAR. 7 |
|
1967 |
795.00 |
|
|
|
791.00 |
NOV. 17 |
|
|
|
|
|
|
|
NOV. 18 |
|
1968 |
795.00 |
|
|
|
788.70 |
OCT. 18 |
|
1969 |
795.00 |
|
|
|
790.40 |
JAN. 8 |
|
1970 |
795.00 |
|
|
|
787.60 |
JAN. 23 |
|
1971 |
795.20 |
MAY 16
|
|
|
789.60 |
FEB. 3 |
|
1972 |
797.60 |
JUN. 22 |
|
|
791.70 |
MAR. 10 |
|
|
|
|
|
|
|
MAR. 11 |
|
1973 |
795.00 |
|
|
|
791.80 |
NOV. 13 |
|
|
|
|
|
|
|
NOV. 30 |
|
|
|
|
|
|
|
DEC. 1 |
|
1974 |
795.00 |
|
|
|
790.50 |
DEC. 5 |
|
|
|
|
|
|
|
DEC. 6 |
|
|
|
|
|
|
|
DEC. 7 |
|
1975 |
796.80 |
MAR. 20 |
|
|
791.60 |
JAN. 3 |
|
|
|
|
|
|
|
JAN. 4 |
|
1976 |
795.00 |
|
|
|
789.90 |
SEP. 30 |
|
1977 |
795.20 |
APR. 5 |
|
|
788.30 |
OCT. 21 |
|
|
|
|
|
|
|
OCT. 22 |
|
1978 |
799.79 |
APR. 27 |
796.40 |
JAN. 27 |
790.30 |
NOV. 11 |
|
1979 |
796.90 |
FEB. 26 |
796.30 |
SEP. 22 |
792.30 |
JAN. 1 |
|
|
|
|
|
SEP. 23 |
|
|
|
1980 |
795.30 |
APR. 14 |
|
|
789.40 |
DEC. 5 |
|
1981 |
794.70 |
JUL. 13 |
|
|
789.30 |
JAN. 17 |
|
1982 |
795.00 |
|
|
|
791.80 |
NOV. 5 |
|
1983 |
795.80 |
APR. 10 |
|
|
789.80 |
OCT. 7 |
|
|
|
|
|
|
|
OCT.20 |
|
1984 |
795.10 |
FEB. 14 |
|
|
792.50 |
OCT. 20 |
|
|
|
FEB. 16 |
|
|
|
OCT. 21 |
|
|
|
|
|
|
|
OCT. 22 |
|
1985 |
799.50 |
NOV. 5 |
795.80 |
AUG. 18 |
792.60 |
MAY 14
|
|
|
|
|
|
AUG. 19 |
|
|
|
1986 |
795.00 |
|
|
|
790.80 |
AUG. 15 |
|
1987 |
799.53 |
APR. 17 |
799.26 |
SEP. 8 |
792.90 |
AUG. 27 |
|
|
|
|
798.35 |
APR. 26 |
|
|
|
|
|
|
796.25 |
MAR. 2 |
|
|
|
1988 |
795.00 |
|
|
|
790.75 |
DEC. 13 |
|
1989 |
795.30 |
MAY 6
|
|
|
790.84 |
FEB. 17 |
|
1990 |
796.09 |
OCT. 23 |
|
|
793.33 |
JUL. 6 |
|
1991 |
795.00 |
|
|
|
790.34 |
NOV. 6 |
|
1992 |
797.46 |
APR. 22 |
|
|
791.44 |
FEB. 2 |
|
1993 |
796.56 |
MAR. 5 |
|
|
791.48 |
NOV. 18 |
|
1994 |
795.41 |
MAR. 29 |
|
|
791.92 |
NOV. 1 |
|
1995 |
796.31 |
JUN. 29 |
795.14 |
JUN. 24 |
791.11 |
OCT. 3 |
|
1996 |
796.56 |
SEPT. 7 |
795.63 |
JAN. 20 |
792.88 |
FEB. 7 |
|
1997 |
795.00 |
|
|
|
791.55 |
OCT. 24
|
|
1998 |
795.83 |
JAN. 28 |
795.45 |
FEB. 5 |
789.11 |
DEC.9 |
|
1999 |
795.07 |
DEC. 20 |
795.03 |
APR. 12 |
789.72 |
JAN. 05 |
|
2000 |
795.17 |
APR. 19 |
795.09 |
APR. 20 |
*791.59 |
NOV. 27 |
|
2001 |
795.09 |
MAR. 18 |
|
|
788.52 |
NOV. 28 |
|
2002 |
795.08 |
DEC. 16 |
|
|
788.83 |
JAN. 11 |
|
2003 |
796.15 |
FEB. 23 |
|
|
793.13 |
MAY. 9
|
|
2004 |
797.42 |
SEP. 29 |
|
|
793.10 |
FEB.20 |
|
|
|
|
797.10 |
SEP.30 |
|
|
|
|
|
|
796.97 |
SEP.28 |
|
|
|
|
|
|
796.01 |
OCT.01 |
|
|
|
|
|
|
795.11 |
APR.19 |
|
|
|
2005 |
795.09 |
FEB. 16
|
|
|
791.85 |
OCT.5 |
|
2006 |
795.09 |
SEP. 12
|
|
|
791.47 |
JUN. 22
|
|
2007 |
795.06 |
JAN. 1
|
|
|
789.57 |
OCT. 23
|
|
2008 |
795.01 |
MAR. 15
|
|
|
789.54 |
DEC. 10
|
Updated 01/12/09 (LAS)
*Revision to previously published data
|
Smith Mountain is a pumped storage project that utilizes an upper reservoir (Smith Mountain Lake) and a lower reservoir (Leesville Lake.) The water that is stored in Smith Mountain Lake first passes through turbine-generators in the powerhouse to produce electricity -- primarily during peak usage hours -- and the water is then discharged into Leesville Lake. Most of this water is retained in the Leesville Lake and is pumped back into the Smith Mountain Lake for re-use. This pumping occurs during periods of low demand.
|
