EAST BRANCH DAM

EAST BRANCH NAUGATUCK RIVER - Naugatuck River Watershed - Torrington, CT

Owned and Maintained by the State of Connecticut, Dept. of Environmental Protection, Water and Related Resources Unit - (860) 566-7244

DRAINAGE AREA: 9.3 sq.mi.
PERMANENT POOL: None

DAM

Type: Rolled earth fill
Length: 700 Feet
Top Elev = 881.0 Ft NGVD (83 Ft)

FLOOD CONTROL STORAGE

Capacity: 4,350 Acre Feet
8.8 Inches of Runoff
Area at Crest: 158 Acres

CONTROL WORKS

Type: Circular Concrete Conduit
Size: 3.0' diameter
Length: 450 Feet
Gate Invert Elev = 798.0 Ft NGVD
Capacity (Full Pool): 225 cfs
Gate (Type): Ungated
Channel Capacity = 300 cfs
Stilling Basin: 25' x 12' wide, baffle blocks and end sill

SPILLWAY

Type: Chute Spillway/Ogee Weir
Length: 100 Feet
Elev = 865.0 Ft NGVD (67 Ft)

SPILLWAY DESIGN FLOOD

Original Design Criteria:

Rainfall Excess = 22.8 inches
Initial Pool Level = Full
Flood Control Outlet Gates = Negligible
Peak Inflow = 15,500 cfs
Peak Outflow = 14,300 cfs
Max. Pool = 876.0 ft-NGVD
Freeboard = 5.0 ft

RECREATIONAL FACILITIES: None

TOTAL COST: $3,250,000

PLACED IN OPERATION: June 1964