Project has Non-Federal Hydropower (see below)
DRAINAGE AREA:
220 sq.mi.
PERMANENT POOL: 215 Acre Recreation Pool, Stage = 35 Ft
DAM
Type: Rolled earth fill
Length: 1,640 Feet
Top Elev = 572.0 Ft NGVD
(182 Ft)
FLOOD CONTROL STORAGE
Capacity: 71,000 Acre
Feet
6.1 Inches of Runoff
Area at Crest: 1,100
Acres
CONTROL WORKS
Type: Circular Conduit
Size: 14'-4"
diameter (steel lined as a 12-ft dia. for hydropower)
Steel Penstock Length:
approx. 1200 ft (inside Dam to bypass Gate)
Upstream Invert Elev =
390.0 Ft NGVD
Bypass Gate: 1 @
8'-4"W x 12'H
Bypass Invert Elev =
380.90 Ft-NGVD
Capacity (Full Pool):
7,000 cfs
Bifurcated Penstock:
12-ft dia. For 175-ft; then transition to 9-ft dia. into Powerhouse
Dam Sluice Gates:
Gates (Type): Hydraulic
Slide
Number: 3
Size: 5'-8" x 10'
Channel Capacity = 6,000
cfs
SPILLWAY
Type: L-shaped
Side-Channel
Length: 465 Feet
Elev = 546.5 Ft NGVD
(156.5 Ft)
SPILLWAY DESIGN FLOOD
Rainfall Excess = 17.2 inches
Initial
Pool Level = Full
Flood Control Outlet
Gates = Operable
Peak Inflow = 199,000
cfs
Peak Outflow = 171,000
cfs
Max. Pool = 566.8 ft-NGVD
Freeboard = 5.2 ft
Rainfall Excess = 20.3
inches
Initial Pool Level =
Full
Flood Control Outlet
Gates = Operable
Peak Inflow = 217,600
cfs
Peak Outflow = 180,700
cfs
Max. Pool = 568.1 ft-NGVD
Freeboard = 3.9 ft
HYDROPOWER
Non-Federal owned by
Essex Hydro Assoc.
Active Since Oct. 2005
Peaking Operation
Installed Cap = 4.0 MW
Normal Power Pool: 35 ft
Head Operating Range:
1-3 ft Seasonally
Turbine Op Range:
200-810 cfs
RECREATIONAL FACILITIES: 23 Picnic tables, water, parking areas, bathroom, boat ramp, and
2 group picnic shelters. Quechee Gorge state leased campground, with 30
campsites and fireplaces.
TOTAL COST:
$7,130,000
PLACED IN OPERATION: January 1961