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Cape Fear Lock & Dam No. 1 Fish Passage


  • Owner:  U.S. Army Corp of Engineers
  • Construction Cost: $9,154,190
  • Completion Date: January 2013 

Scope of Services:

  • Install 90,000 Tons of Rip Rap/Armor Stone to Shape Dam Spillway
  • Improvements to Existing Lock Wall

Installation of Rip Rap and Armor Stone Fish Ladder on the Cape Fear River: Three different sizes of stone are used to bring up existing grade of the dam spillway to allow “up-hill” fish migration. Rip rap 6”-12” in size is used for the majority of the fill section and capped off with a 5.5 foot thick layer of 24” Ø armor stone. Large boulders 6’ x 6’ x3.5’ are placed to form 84 individual pools that the fish can swim into and through. Large Hitachi 650 and Hitachi 300 excavators mounted with Trimble RTK machine control system is being used to keep the project on grade at all times.


U.S. Corp of Engineers
69 Darlington Ave.
Wilmington, NC  28403