Presentation is loading. Please wait.

Presentation is loading. Please wait.

CWPPRA New Orleans Land Bridge Shoreline Enhancement and Marsh Creation Project Project Kickoff Meeting April 15, 2015.

Similar presentations


Presentation on theme: "CWPPRA New Orleans Land Bridge Shoreline Enhancement and Marsh Creation Project Project Kickoff Meeting April 15, 2015."— Presentation transcript:

1 CWPPRA New Orleans Land Bridge Shoreline Enhancement and Marsh Creation Project Project Kickoff Meeting April 15, 2015

2 Meeting Goals Review project background Discuss project features and potential changes or additional features to investigate Discuss engineering and design tasks necessary to reach 30% design milestone Discuss other Phase 1 tasks – cultural resource investigations, ESA, landrights, permits, NEPA Agree on schedule for Phase 1 tasks to reach 30% design

3 Background Located in Region 1, Pontchartrain Basin, Orleans Parish, along the eastern shore of Lake Pontchartrain Restores marshes along the Orleans Landbridge and provides protection to U.S. Highway 90, the Lake St. Catherine community, and Fort Pike The most significant loss occurred as a result of Hurricane Katrina which scoured the marshes and converted 100 acres to open water within the extended boundary. USGS land change analysis determined an interior and shoreline loss rate of -0.31 %/yr for the 1984-2012 (USGS, 1984 to 2011).

4 Restore and enhance 271 acres of brackish marsh MC1 – 107 acres MC2 – 85 acres MC3 – 14 acres, unconfined MC4 – 65 acres TME = 1.2 FT NAVD 88 Enhance 15,340 linear feet of shoreline as earthen berm along the restored lake shorelines ( 3.1 FT NAVD) Total MC = 169 ac, MN = 102 ac Project Features

5 Project Features (Cont.) Approximately 1.6 million cubic yards of material would be dredged from 2 borrow sites proposed in Lakes Pontchartrain and St. Catherine. Four gaps are proposed at MC 1, and gaps along western containment dike at MC 2 Tidal creeks – post construction along with gaps The project would result in approximately 167 net acres of brackish marsh over the 20-year project life. Fully funded cost is $17,549,317; Phase 1 cost is $1,942,143

6 Design Considerations Shoreline enhancement – consider rip-rap Borrow Areas – Atlantic sturgeon CH, initiate early Dredge pipe route & access route – depends on borrow area layout Dewater locations – position to provide additional benefits Gapping vs. degrading Tidal creeks Vegetative Plantings Identify/permit additional areas should surveys indicate shallower depths (additional material)

7 seaside sparrow Nelson’s sparrow rails – king, clapper, black little blue heron reddish egret mottled duck salt-marsh top minnow Louisiana-eyed silkmoth © Brent Ortego/seaside sp Species of Conservation Concern

8 Permitted Residential Development

9 Borrow Areas and Pipeline Layouts

10 Access http://maps.ngdc.noaa.gov/viewers/bathymetry/?layers=nos_hydro&minx=-200&maxx=-50&miny=10&maxy=70 http://www.ngdc.noaa.gov/docucomp/page?url=http://surveys.ngdc.noaa.gov/mgg/NOS/hsmdb/H02001-H04000/H03961_hsmdb.xml&view=hydro/survey&header=none

11 CRMS Gages

12 Engineering & Design and other Phase 1 Tasks Surveys – Geotechnical Investigation – Bathymetry/Topographic – magnetometer Wave analysis/borrow assessment Landrights – pipeline investigations – meet with landowners NEPA – ESA consultation – Cultural Resources/Tribal

13 Engineering & Design Schedule Signed CSA – Fall 2015 Surveys – Fall/Winter 2015 Design – Summer 2016 30% Design Review Meeting – September 2016 95% Design Review Meeting - 2017


Download ppt "CWPPRA New Orleans Land Bridge Shoreline Enhancement and Marsh Creation Project Project Kickoff Meeting April 15, 2015."

Similar presentations


Ads by Google