Construct a Coastal Slurry Pipeline
Moderate Recovery Value
PLAQUEMINES PARISH | SECTOR: FLOOD PROTECTION AND COASTAL RESTORATION
STRATEGIC RECOVERY GOAL:SPACE Within the next five years establish a continuous program of barrier island restoration, marsh/wetland restoration, and ridge development for the Plaquemines Parish coastal zone.
  DESCRIPTION | COMMUNITY WIDE IMPACT
 
ADDRESS: ; , LA AREA:
TARGET START DATE: 05/01/2006 DURATION: 40 Months
Current Status Effective Date Comments
Included in Recovery Plan 04/07/2006
 
 
DESCRIPTION:
Plaquemines has over 100 miles of lineal coastline and hundreds of square miles of existing marsh. Despite what is left, Plaquemines has lost hundreds of square miles of marsh and experienced the highest amount of total wetland loss from Katrina and Rita (over 70 square miles). This area has suffered significant land loss for over 60 years. Causes of land loss relate to a combination of reduced sediment flow to the Delta due to levees along the Mississippi River; canals dredged for oil exploration and extraction; and tidal changes related to sea level rise. Hurricanes Cindy, Katrina, and Rita caused accelerated land loss, quantified at 15 square miles (2% in a week's time). Impacts include erosion of all barrier islands, scouring of marsh/wetlands, and introduction of saltwater into fresh water areas of the estuary, killing plants that hold the marsh together. Without effective natural coastal defenses of barrier islands, ridges, marshes, and wetlands Plaquemines Parish residents and infrastructure both within and outside the levee system are increasingly vulnerable to even small hurricanes.

The following objectives have been identified: Utilize proven sediment transfer methods for restoration activities; Incorporate small diversions to maintain regenerated marsh; Coordinate with existing partners (including commercial/recreational fishermen)to identify locations for marsh/wetland regeneration; Include re-vegetation to sustain natural habitat areas; Initiate marsh/wetland development in close proximity to levees to provide added hurricane protection. Complement, combine hurricane and flood protection measures. Use tested methods conveying sediment to the marsh areas (such as slurry pipe lines and small scale diversions).

Establish a series of approximately 40 miles of slurry pipelines with pumps and outlet units for slurry distribution. Development of 10,000 acres of marshland/wetland, ridge. Pipeline locations would be established in locations selected to fortify areas close to the levee system. Land development and rights will be coordinated with oyster lease holders. Project will restore the 15 square miles of lost land mass due to hurricane impacts on barrier islands, marsh/wetlands and ridges and restore previously land losses in critical areas. This project will be coordinated with minor diversion projects that will help sustain marsh/wetland areas.


COMMUNITY WIDE IMPACT:
 
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