Project Detail

Back Channel Marina Portsmouth Naval Shipyard

Kittery, ME

Scope of Work

Cianbro designed and installed a new 70-slip marina for the Navy’s Morale, Welfare and Recreation (MWR) Department. 

Project Details

  • Provided engineering/design for the marina and fire protection system
  • Furnished and installed:
    • A new 80 feet aluminum gangway and associated site work to anchor the gangway to shore with a foundation system that incorporated an existing bulkhead
    • 29 ea. 20,000 pound granite mooring blocks complete with stainless steel and galvanized hook
    • 23 Helix mooring anchors 
    • 52 Seaflex elastic mooring assemblies, tensioned in place
    • 47 linear feet of 14 feet wide concrete floating dock main modules
    • 414 linear feet of 7 feet wide concrete floating dock main modules
    • 12 ea. 4 feet by 28 feet concrete floating finger modules
    • 11 ea. 4 feet by 38 feet concrete floating finger modules
    • 956 linear feet of 2 inches PVC domestic water line
    • 890 linear feet of 4-inch schedule 10 stainless steel fire line, complete with 5 ea. 2 1/2 inch standpipes
    • 38 power and water supply pedestals
    • 4,100 linear feet of cable tying the light house power pedestals into the shore power
    • A new transformer, switch and panel to provide electricity service

Lean, Innovative, and Unique Project Solutions

The project design had to incorporate the rehabilitation and re-use of an existing section of dock. As a result, custom brackets were designed to work with the Seaflex mooring system. Additionally, due to the weight of the granite mooring blocks, specially designed floating equipment was used to handle and set the granite mooring blocks into place. 

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