Volume 4, Issue 1
The team followed Roguish Bouy with a 1000 mile drive north across British Columbia and a short six hour ferry ride and conducted an inspection of the floating breakwater system in the vicinity of Bar Harbor, Ketchikan, AK from 3-9 FEB 2008 for U.S. Army Corp of Engineers (USACE). The 86th Engineer Dive Team was provided support by U.S. Coast Guard (USCG) Base Ketchikan, USCG Mobile Security and Surveillance Team (MSST) Anchorage, and the Ketchikan Harbor Master Office. An inspection was performed by making visual inspections of the breakwater both on the surface and underwater with over 400 minutes of bottom time in depths up to 110’. There are two floating breakwater structures that consist of reinforced concrete 4.5' x 6' hollow section members filled with polystyrene and configured in an open cell ladder formation. The larger breakwater consists of four post tensioned breakwater modules which are 240’ in length for a total breakwater length of 960’. The modules are connected by six wire rope cables. The other breakwater consists of one individual floating module of 120’ in length. Both structures have hawsepipes through every third transverse member to the breakwater where each mooring leg is secured and the mooring legs terminate at a 16' long x 16' wide x 5' high concrete anchor block.