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Statistical Information
J. Percy Priest Lake is a key project in the development of
the Cumberland River Basin. J.
Percy Priest Dam was built at mile 6.8 on the Stones River, a tributary of the
Cumberland. The lake is located in
north central Tennessee, encompassing portions of Davidson, Rutherford, and
Wilson Counties. Rising 130 feet
above the streambed, the combination earth and concrete-gravity dam is 2,716
feet long with a hydroelectric power generating plant.
The dam has contributed significantly in reducing the frequency and
severity of flooding in the Cumberland Valley.
In addition to the far reaching effects of flood control, the project
contributes to the available electric power supply of this area.
At normal summer pool (Elevation 490.0) the 42-mile long
lake with its 213 miles of shoreline contains 14,200 surface areas of water. Total
storage capacity at maximum pool (Elevation 504.5) is 652,200 acre-feet.
Average annual energy output is 70 million kilowatt hours.
Other Data
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DAM
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Type
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Concrete-gravity and earthfill
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Dimensions:
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Maximum
height, feet
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130
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Length,
feet (concrete, 663.5; earth, 2,052.5)
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2,716.0
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Elevations
(above mean sea level):
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Top
of dam, roadway (Bell Road)
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522.0
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Top
of gates
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504.5
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Spillway
crest
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463.5
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HYDROPOWER
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Installation
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1 unit
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Generator Rating, kilowatts
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28,000
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Estimated energy output, average yearly,
kilowatt-hours
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70,000,000
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RESERVOIR
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Drainage
area, square miles:
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865
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Length of
pool at Elev. 490.0, river miles:
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42
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Length of
shoreline, pool at Elev. 490.0, miles:
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213
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Area,
acres:
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Top
of flood-control pool (Elev. 504.5)
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22,700
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Maximum
power pool (Elev. 490.0)
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14,200
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Land
acreage above normal summer pool (Elev. 490.0)
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18,854
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Total
project area
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33,054
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Storage
capacities, acre-feet:
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Flood
control (Elev. 504.5-490.0)
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260,000
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Power
drawdown (Elev. 490.0-480.0)
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124,000
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Permanent
pool (below Elev. 480.0)
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268,000
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Total
(below Elev. 504.5)
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652,000
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