Marsh Assessment - Species Cover vs Elevation

Marsh Reference Site Assessment

Atchafalaya River / Northern Terrebonne Marshes restoration

This 500,000-acre water resources and marsh restoration project is designed to reduce ecological, economic and cultural losses in the Northern Terrebonne Marshes by increasing conveyance of river water from the Atchafalaya to the target marsh areas and modifying existing controls affecting marsh hydrology. The Northern Terrebonne Marshes have experienced significant wetland losses due to human impacts, subsidence, erosion and habitat conversion. Specific project objectives are:

  • Increase sediment and nutrient inputs into estuarine wetlands
  • Prevent land loss and habitat conversion
  • Protect socioeconomic resources
  • Restore marsh hydrology
  • Reduce salinity
  • Increase fresh water residence time
  • Sustain existing fish & wildlife habitat

Cypress worked for the US Army Corps of Engineers, New Orleans District supporting the LCA 6 program effort in conjunction with the Louisiana Office of Coastal Protection and Restoration and a multidisciplinary team of specialist engineering, scientific and consulting firms.

Louisiana Coastal Area 6 Restoration Program

Cypress was responsible for providing restoration program support to the US Army Corps of Engineers, New Orleans District (USACE MVN) for the Louisiana Coastal Area (LCA) Program for the group of LCA 6 projects. These projects covered a diverse array of large-scale ecosystem restoration techniques such as river diversions, barrier island renourishment, marsh creation, and restoring hydrologic connectivity.

Cypress personnel were responsible for providing planning program support to draft a Summary Report required by the Water Resources Development Act (WRDA) of 2007 which authorized the 6 projects. USACE MVN had not previously undertaken an effort to summarize the findings and content of an integrated feasibility study and NEPA documentation; therefore the initial effort required drafting a document to address the needs of ER-1105-2-100 at a summary level and obtain approval for the template. The Summary Report provided a complete overview of the combined feasibility study and NEPA documents.

Cypress personnel interfaced with many different groups including report authors (6 different companies), the state and federal agencies who contracted the work, internal subcontractors who provided key policy-level and additional editorial review at strategic points, as well as multiple junior-level engineers and scientists. All six reports were completed and undergoing reviews simultaneously resulting in extensive coordination efforts and extensive QA/QC review to ensure the report was well-written and contained the most accurate and up-to-date information from the respective project teams.

This project was done in partnership with Malcolm Pirnie/Arcadis.

Lower Devil’s Swamp Mitigation Bank

Bayou Auguste Tidal Stream Restoration, Phase 4

The fourth phase of the Bayou Auguste tidal stream restoration was completed in Spring 2015. The segment of the bayou between its culverted portion near Davis Street and the bridge at Braun Street had extensive floodplain restoration and bank reshaping, along with a new community of native upland plants installed on the nonwetland park portion of the site.

Cypress worked with the Gulf Coast Community Design Studio and the Land Trust for the Mississippi Coastal Plain to provide ecosystem restoration design, environmental engineering, and construction oversight of the project from concept through construction for restoration of the bayou shoreline and tidal marsh floodplain. This restoration project removed fill material and debris while restoring typical landform of native estuarine marsh habitat.

Our integrated science and engineering design process was tailored to meet the needs of this project.

Work completed at this site includes the following:

  • Development of the initial site concept
  • Locating and characterizing local reference habitats; References were used to establish species lists and densities
  • Completed Baseline Assessment (pre-project)
  • Completed a construction stormwater pollution prevention plan (SWPPP) utilizing bioengineered materials
  • Provided construction management
  • Monitored stormwater best management practices (BMPs)
  • Completed a Year 1 Monitoring Report

This project received the Gulf Guardian Award (1st Place, Civic Project) from the US Environmental Protection Agency.