Cape May New Stone Seawall Construction

Cape May is a city located at the Southern Tip of the Cape May Peninsula, where the Delaware Bay meets the Atlantic Ocean. The area was vulnerable to ocean flooding as the Cape May seawall ran parallel between the beach and Beach Avenue. It has been historically problematic during hurricanes and nor'easters. CASHMAN was contracted by the Army Corps to build a shoreline protection structure across a one-mile stretch of oceanfront property from Townsend Inlet to the Cape May Inlet in Avalon, New Jersey. The extension of the Cape May Seawall was an effort to protect critical infrastructure, businesses and homes from damages due to severe coastal storms and to mitigate the areas coastal flood hazard for future storms.

Work included removal of existing stone, excavation, placement of a foundation mattress, placement of core stone, and placement of capstone ranging in weight between 5 and 8 tons. 


  • CASHMAN placed 100,000 tons of armor stone. 
  • Built two layers of armor stone, while maintaining a -6 inch /+1 foot tolerance on the slope and crest. 
  • The toe of the slope was -7 below MLW. 
  • Over 7,000 square yards of marine mattresses were also installed. 
  • CASHMAN was able to construct 3,000 feet of seawall within the contract time limits. 

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USACE, Philadelphia
$15 million
Aug. 2004 - Dec. 2006