TULLY DAM

EAST BRANCH TULLY RIVER - Connecticut River Basin - East Branch Tully River

DRAINAGE AREA= 50 sq.mi.

PERMANENT POOL= 300 Acre Recreation Pool
Summer Stage = 16 Ft
Winter Stage = 11 Ft

DAM
Type= Rolled earth fill
Length= 1,570 Feet
Top Elev=684.0 Ft NGVD (59 Ft)

FLOOD CONTROL STORAGE
Capacity= 22,000 Acre Feet
7.8 Inches of Runoff
Area at Crest= 1,130 Acres

CONTROL WORKS
Type= Tunnel
Size= 6 Feet diameter
Length= 274 Feet
Invert Elev = 625.0 Ft NGVD
Capacity at Full Pool=1,000 cfs
Gates (Type)= Power-driven slide
Number= 2
Size= 3.5' x 6'
Channel Capacity = 825 cfs

SPILLWAY
Type= Uncontrolled Ogee Weir
Length= 255 Feet
Elev = 668.0 Ft NGVD (43 Ft)

SPILLWAY DESIGN FLOOD

• Original Design Criteria=
• Rainfall Excess = 17.6 inches
• Initial Pool Level = Full
• Flood Control Outlet Gates = Inoperable
• Peak Inflow = 40,000 cfs
• Peak Outflow = 32,700 cfs
• Max. Pool = 678.8 ft-NGVD
• Freeboard = 5.2 ft
• Current HMR 51 & 52 Criteria=
• Rainfall Excess = 27.0 inches
• Initial Pool Level = Full
• Flood Control Outlet Gates = Operable
• Peak Inflow = 44,400 cfs
• Peak Outflow = 40,080 cfs
• Max. Pool = 680.0 ft-NGVD
• Freeboard = 4.0 ft

RECREATIONAL FACILITIES= Picnic area, 10 picnic tables with grills, two parking areas, bathrooms, boat ramp, campground consists of 35 campsites, bathrooms with showers, and canoe launch.

TOTAL COST= $1,552,000

PLACED IN OPERATION= September 1949

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