Lake Hermitage Marsh Creation – NRDA Early Restoration Project

The Lake Hermitage Marsh Creation – NRDA Early Restoration Project involves the creation of marsh within a project footprint known as the “Lake Hermitage Marsh Creation Project” developed for and funded through the Coastal Wetlands Planning, Protection and Restoration Act (CWPPRA) Program. This project substitutes approximately 104 acres of created brackish marsh for approximately 5-6 acres of earthen terraces that would otherwise have been constructed within the CWPPRA project boundary.

The Lake Hermitage Marsh Creation – NRDA Early Restoration Project will create approximately 104 acres of brackish marsh in lieu of the 7,300 linear feet of earthen terraces that was included in the final design of the base CWPPRA project. This additional marsh area will be constructed entirely within the base CWPPRA project’s terrace boundary. Sediment will be hydraulically dredged from a borrow area in the Mississippi River, and pumped via pipeline to create new marsh in the project area. Over time, natural dewatering and compaction of dredged sediments should result in elevations within the intertidal range which would be conducive to the establishment of emergent marsh. The 104-acre fill area will be planted with native marsh vegetation to accelerate benefits to be realized from this project.

The Lake Hermitage Marsh Creation – NRDA Early Restoration Project is located within the Barataria Hydrologic Basin in Plaquemines Parish, Louisiana, to the west of the community of Pointe a la Hache, and northwest of the community of Magnolia. This basin was identified as a priority area for coastal restoration, and has been the focus of extensive study and project design and implementation.

To view the Lake Hermitage Monitoring Plan, click here.
To view the June 2014 as-built data (PDF), click here.
To view the June 2014 as-built data (Excel), click here.

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RRP Region: Region 2
Parish: Plaquemines
Project Area: 104 acres
Total Potential Cost: $14,400,000
Status: Construction (In Progress). Dredging operations in the NRDA fill cell were completed in Jan 2014. Vegetative plantings are anticipated for Fall 2014/Spring 2015 time frame.
Latitude: 29.54936
Longitude: -89.848

Aerial view prior to the pumping sediment/fill for marsh creation which began November 2013.
Photo provided by: CPRA
Date Taken:

Aerial view after the pumping sediment/fill for marsh creation was completed in February 2014.
Photo provided by: CPRA
Date Taken:March 2015

Looking Down Jefferson Canal from the Mississippi River with Booster Pump.
Photo provided by: CPRA
Date Taken: 3/7/2014

The dredge slurry pipeline, transitioning from land to water, at the head of Jefferson Canal before submerging and continuing down the canal to the marsh creation cells.
Photo provided by: CPRA
Date Taken: 8/1/2012

The Pine Bluff Sand & Gravel dredge Marion that will mine sediment from the Mississippi River that will be transported via pipeline to the marsh creation cells.
Photo provided by: CPRA
Date Taken: 7/12/2012

The dredge slurry pipeline (in green) that will transport sediment mined from the Mississippi River crossing over the MR&T levee adjacent to the West Point a la Hache siphon (in white).
Photo provided by: CPRA
Date Taken: 7/12/2012

A view of the completed earthen containment dike from inside the marsh creation cell prior to initiating Mississippi River dredging.
Photo provided by: CPRA
Date Taken: 7/12/2012

A bucket dredge initiating construction of the earthen containment dikes that will form the marsh creation cell holding material dredged from the Mississippi River.
Photo provided by: CPRA
Date Taken: 3/22/2012