EAST BRIMFIELD DAM

QUINEBAUG RIVER - Thames River Basin - Fiskdale, MA

DRAINAGE AREA: 67.5 sq.mi.

PERMANENT POOL: 360 Acre Recreation Pool
Stage: 13 ft (632.0 ft NGVD)

DAM
Type: Rolled fill, earth
Length: 520 Feet
Top Elev: 672.2 ft NGVD (53.2 ft)

FLOOD CONTROL STORAGE
Capacity: 29,900 Acre Feet
8.3 Inches of Runoff
Area at Crest: 2,300 Acres

CONTROL WORKS
Type: Horseshoe Conduit
Size: 10.5' diameter
Length: 210 Feet
Invert Elev: 619.0 ft NGVD
Weir Crest: 632.0 ft NGVD (13 ft)
Capacity (Full Pool): 3,300 cfs
Gates (Type): Slide, Screw Lift
Number: 2
Size: 6'-3" x ll'
Channel Capacity: 900 cfs

SPILLWAY
Type: Chute Spillway with Concrete Ogee Weir
Length: 75 Feet
Elev: 653.0 ft NGVD (34 ft)

SPILLWAY DESIGN FLOOD

Original Design Criteria:
- Rainfall Excess: 22.9 inches
- Initial Pool Level: Full
- Flood Control Outlet Gates: Inoperable
- Peak Inflow: 73,900 cfs
- Peak Outflow: 15,520 cfs
- Max. Pool: 667.3 ft-NGVD
- Freeboard: 4.9 ft
Current HMR 51 & 52 Criteria:
- Rainfall Excess: 27.0 inches
- Initial Pool Level: Full
- Flood Control Outlet Gates: Operable
- Peak Inflow: 80,000 cfs
- Peak Outflow: 22,900 cfs
- Max. Pool: 669.9ft-NGVD
- Freeboard: 2.3 ft

RECREATIONAL FACILITIES: Corps operated Lake Siog Park in Holland has 20 picnic tables and grills, swimming beach, bathrooms, sandlot volleyball area and ample parking. There are four Corps managed boat ramps for canoes and power boats around the project and trails at the damsite and off of Five Bridge Road and Route 20 in Brimfield.

TOTAL COST: $7,057,000

PLACED IN OPERATION: June 1960