• Hurricane Barrier Photos
• Real-time and Predicted Tides from NOAA
Note: Tide Datum Conversion for NGVD: MLLW - 0.88 = NGVD

PROJECT PERSONNEL: Owned and Operated by the City of New London, CT (860) 447-5250
PROJECT PURPOSE: Hurricane Flood Protection
LOCATION: Project is located in Shaws Cove/New London Harbor, in the city of New London, New London County, Connecticut
PROTECTED AREA: Provides protection from high tides caused by coastal storms and hurricanes as well as from interior flooding caused by overbank flows from Truman Brook to all areas of the Shaws Avenue Urban Development area.

Design Summary: New London barrier was designed for a 100-year stillwater elevation of 10.5 Ft-NGVD. This level is equivalent to a surge of 8.6 ft coincident with a mean spring high water tide of 1.9 Ft-NGVD. Maximum wave runup is approximately 4 ft resulting in a top elevation of the barrier to be 14.5 Ft-NGVD. The pumping station, gravity conduit, and pressure conduit, were designed for a 10-year, 100-year and 100-year runoff, respectively.

• PROJECT FEATURES:
• • Design Hurricane Tide = 10.5 Ft NGVD
  • 715 ft earth-filled dike
  • 800 ft concrete wall
  • Top Elevation = 14.5 Ft NGVD
  • 96-inch diameter pressure conduit from Truman Brook to Shaws Cove
  • Interior runoff Pump Station of 210 cfs (DA=755 acres)

TOTAL COST: $11,500,000 PLACED IN OPERATION: January 1985

• Mean Tide Data
• • Mean Tide Range: 2.57 ft
  • Mean High Water: 1.92 Ft-NGVD
  • Mean Low Water: -0.65 Ft-NGVD