Inner Harbor Navigation Canal (tbi0901)
Traylor-Massman-Weeks, LLC, as a subcontractor to Shaw Environmental & Infrastructure, was awarded the floodwall portion to a line of defense that is intended to provide improved hurricane protection for New Orleans, and specifically for the Inner Harbor Navigation Canal, from surges and waves at the 100-year level that may enter the canal from Lake Borgne.  The project also includes a temporary bypass, gate two navigable gate structures, and tie in walls to the existing levees. 

The floodwall is being constructed from the Mississippi River Gulf Outlet (MRGO) to the Gulf Intracoastal Waterway (GIWW), a length of approximately 7,500 lineal feet.  The floodwall is composed of driven 144 ft. long, 66" concrete cylinder pile, filled with concrete to El. -88 and spaced 6" apart to an elevation of approximately 14 MSL.  The space between the cylinder pile will be closed with 18" concrete pile and filled with concrete.  Battered 36" diameter steel pipe measuring 300 ft. long will be installed on the inland side of the wall to support lateral loads applied to the wall.  A precast concrete cap will be placed on the pile and post-tensioned in place.  Sections of the cap between the precast will be cast-in-place concrete.  The final elevation of the wall with pile, concrete cap, and parapet wall will be approximately Elevation 26 MSL.

Construction of the wall is scheduled from February 2009 through July 2010 with the concrete cylinder pile and 18" closure piles driven by end of September 2009 to provide for advance measures of hurricane protection for the 2009 hurricane season.