WESTVILLE DAM
QUINEBAUG RIVER - Thames River Basin - Southbridge, MA
DRAINAGE AREA: 99.5 sq.mi.(Gross)
32.0 sq.mi.(Net)
PERMANENT POOL: 23 Acre Recreation Pool
Stage: 10.5 ft (525.5 ft NGVD)
DAM
Type: Rolled Earth Fill
Length: 560 Feet
Top Elev: 587.0 ft NGVD(72 ft)
FLOOD CONTROL STORAGE
Capacity: 11,000 Acre Feet
6.4 (net) Inches of Runoff
Area at Crest: 913 Acres
CONTROL WORKS
Type: 3 Rectangular Conduits
Size: 4' x 6'
Length: 63 Feet
Invert Elev: 515.0 ft NGVD
Weir Elevation (top of logs): 10.5 ft (525.5 ft NGVD)
Capacity (Full Pool): 3,750 cfs
Gates (Type): Elec Controlled Slide
Number: 3
Size: 4' X 6'
Channel Capacity: 1600 cfs
SPILLWAY
Type: Chute Spillway w/Concrete Ogee Weir
Length: 200 Feet
Elev: 572.0 ft NGVD (57 ft)
SPILLWAY DESIGN FLOOD
- Original Design Criteria:
- Rainfall Excess: 24.73 inches
- Initial Pool Level: Full
- Flood Control Outlet Gates: Operable
- Peak Inflow: 38,400 cfs
- Peak Outflow: 24,500 cfs
- Max. Pool: 582.1 ft-NGVD
- Freeboard: 4.9 ft
- Current HMR 51 & 52 Criteria:
- Rainfall Excess: 26.10 inches
- Initial Pool Level: Full
- Flood Control Outlet Gates: Operable
- Peak Inflow: 36,000 cfs
- Peak Outflow: 26,700 cfs
- Max. Pool: 581.9 ft-NGVD
- Freeboard: 5.1 ft
RECREATIONAL FACILITIES: 50 Picnic tables with grills, parking areas, bathroom, water, group picnic shelter, trails, winter skating area and boat ramp.
TOTAL COST: $5,685,000
PLACED IN OPERATION: January 1962