WEST HILL DAM

WEST RIVER - Blackstone River Basin - Uxbridge, MA

DRAINAGE AREA= 28 sq.mi.

PERMANENT POOL= None

DAM
Type= Rolled earth fill
Length= 2,400 Feet
Top Elev=282.0 Ft NGVD (48 Ft)

FLOOD CONTROL STORAGE
Capacity= 12,400 Acre Feet
8.3 Inches of Runoff
Area at Crest= 1,025 Acres

CONTROL WORKS
Type= 3 Conduits
Size= 3'x 5'
Length= 39 Feet
Invert Elev = 234.0 Ft NGVD
Capacity (Full Pool)= 1,480 cfs
Gates (Type)= Sluice
Number= 3
Size= 3'x 5'
Channel Capacity = 425 cfs

SPILLWAY
Type= Concrete gravity weir spillway
Length= 50 Feet
Elev = 264.0 Ft NGVD (30 Ft)

SPILLWAY DESIGN FLOOD

Original Design Criteria=
- Rainfall Excess = 25.6 inches
- Initial Pool Level = Full
- Flood Control Outlet Gates = Inoperable
- Peak Inflow = 26,000 cfs
- Peak Outflow = 8,900 cfs
- Max. Pool = 276.8 ft-NGVD
- Freeboard = 5.2 ft
Current HMR 51 & 52 Criteria=
- Rainfall Excess = 30.78 inches
- Initial Pool Level = Full
- Flood Control Outlet Gates = Operable
- Peak Inflow = 29,000 cfs
- Peak Outflow = 13,000 cfs
- Max. Pool = 279.0 ft-NGVD
- Freeboard = 3.0 ft

RECREATIONAL FACILITIES= 35 Picnic tables with grills, streamside beach, bathroom, water, parking areas, trails, change house and group picnic shelter.

TOTAL COST= $2,300,000

PLACED IN OPERATION= January 1961