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Orleans Avenue Canal: T-Walls, I-Walls, Bridges and Levee

New Orleans, LA

Project Description

DEI prepared the General Design Memorandum for the Orleans Avenue Canal flood protection system which included T-walls, I-walls earthen levees and sealed bridges.  DEI also prepared plans and specification for T-walls, I-walls and earthen levees for construction by the USACE.  These features are now part of the Lake Pontchartrain Hurricane Protection System.  DEI and a famous New Orleans artist, Enrique Alverez, provided the specialized Architectural Treatment of the floodwall surfaces.

The Orleans Avenue Canal Flood protection system required:

  • The preparation of a General Design Memorandum for flood control design alternatives including the hydraulic analysis and effect on the water flow in the canal.
  • A feasibility study for closures at each bridge crossing, including but not limited to a comparison of floodgates, box culverts, high-rise bridges and the final accepted design, i.e., sealed bridges.
  • Plans and specifications approved by the USACE and Geotechnical consultant for a pile test program for public bidding were prepared; the purpose was to determine the pile capacity for the design of the T-walls and Bridges.
  • Alternative flood wall design criteria versus levees for public presentations.
  • Design for the T-walls, I-walls and earthen levees using soil and load parameters as determined by a pile test program.
  • Contract documents, i.e., plans and project specifications for construction of T-walls, I-walls and levees.

The Orleans Avenue Canal Protection System consisted of two parallel flood protection systems each 6,800 feet in length.  Earthen levees were used between Robert E. Lee Blvd. and Lakeshore Dr.  In the most restrictive right-of-way length, a concrete pile supported inverted T-wall was designed.  The project consisted of 4,000 linear feet of earthen levees, 6,000 linear feet of  I-walls and 2,000 linear feet of T-walls.

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