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Title: Individual Environmental Report Supplemental, West Bank and Vicinity, Hero Canal Levee and Eastern Tie-In, Plaquemines Parish, Louisiana, Supplemental IER #13a : Temporary Closure of Hero Canal (IERS 13a)
Authors: United States. Army. Corps of Engineers. New Orleans District.
Keywords: New Orleans (La.)
Environmental management
Flood control
Publisher: United States. Army. Corps of Engineers. New Orleans District.
Abstract: The U.S. Army Corps of Engineers, Mississippi Valley Division, New Orleans District, has prepared this Supplemental Individual Environmental Report #13a (IERS # 13a) to evaluate the potential impacts associated with the proposed project modification to the original IER #13 project West Bank and Vicinity, Hero Canal Levee and Eastern Tie-in area. IERS #13a contains a modification to the original plan which includes the potential closing of the Hero Canal for a maximum of approximately 60 days and a minimum of approximately 30 days within a 90 day time frame. The proposed action is located in Plaquemines Parish near New Orleans, Louisiana. The proposed action consists of closing the Hero Canal to vessel traffic for an estimated maximum of 60 days and a minimum of 30 days in order to ensure availability of 100-year level of risk reduction by the beginning of the 2011 hurricane season in June. Closure of the canal could begin as early as April 15, 2011 or as late as May 15, 2011 and could end as late as July 15, 2011. In IER #13, the proposed action for construction of the stoplog structure within Hero Canal stated "During construction the stoplog closure would be built in phases, allowing continuous passage of vessels in the canal." However, in order to provide 1% level of risk reduction by the 2011 hurricane season, the completion of the stoplog structure would need to proceed simultaneously with the construction of a floodwall across the portion of the canal now serving as a by-pass channel. While the floodwall is constructed, a Temporary Retaining Structure would be in place to allow construction in the dry as well as to provide 1% risk reduction during floodwall construction. The only change to the action discussed in IER #13 would be the complete closure of the Hero Canal to accommodate compaction of the construction schedule and simultaneous fitting of the stoplogs within the stoplog structure and construction of the adjacent floodwall across Hero Canal. No additional footprint or design elements have been identified for the IERS #13a proposed action.
Description: Individual Environmental Report Supplemental
Rights: Approved for Public Release; Distribution is Unlimited
Size: 74 pages / 3.47 MB
Types of Materials: PDF/A
Appears in Collections:Environmental Documents

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