Link to Other Corps SitesWelcome to West Thompson Lake, Connecticut

Flood Control:

Introduction   Water Levels   Dam Facts   Reservoir Regulation


DAM FACTS

  • DRAINAGE AREA:

    173.5 sq.mi.(Gross)

    74.0 sq.mi.(Net)

  • PERMANENT POOL:

    200 Acre Recreation Pool

    Stage: 13 Ft (305.0 Ft NGVD)

  • FLOOD CONTROL STORAGE:

    Capacity: 25,600 Acre Feet 6.5 Inches of Runoff (Net)

    Area at Crest: 1,250 Acres

  • DAM:

    Type: Rolled Earth Fill

    Length: 2,550 Feet

    Top Elev: 361.5 Ft NGVD(69.5 Ft)

  • CONTROL WORKS:

    Type: Horseshoe Conduit

    Size: 12' diam

    Length: 254 Feet

    Invert Elev: 292.0 Ft NGVD

    Capacity (Full Pool): 5,100 cfs

    Gates (Type): Hydraulic Slide

    Number: 3

    Size: 5' X 9'

    Channel Capacity = 2300 cfs

  • SPILLWAY:

    Type: Chute Spillway w/Concrete Ogee Weir

    Length: 320 Feet

    Elev: 342.5 Ft NGVD (50.5 Ft)

  • TOTAL COST: $6,915,000
  • DAMAGES PREVENTED: As of November 2004 $19 million.
  • PLACED IN OPERATION: 1965
  • HIGHEST POOLS OF RECORD:

    Date      -      Stage      -      Percent of Capacity

    10/17/05     41.32 ft            60%

    4/87             40.9 ft              60%

    6/84             38.9 ft              53%