This project aimed to create marsh habitat and restore a ridge at the Spanish Pass Increment of the Barataria Basin in Louisiana. Spanish Pass is a natural historic tributary of the Mississippi River with degraded channel banks and adjacent marsh. This project created 397 acres of ridge and 1,261 acres of marsh habitat.  

A tidal marsh in Bayou Lafourche, Louisiana was degrading due to subsidence and sea-level rise, as well as a drought-induced die-off of Spartina alterniflora. 7.5 hectares of marsh was restored using thin-layer placement of dredged material. Sediment placement improved the recovery of the marsh and increased plant biomass. 

This project created a living shoreline comprised of bioengineered, marsh-fringing oyster reefs. 11.5 miles of reef breakwaters, marine mattresses, and rock revetments were placed off the shoreline to establish the bioengineered reefs. This living shoreline will provide self-sustaining coastal protection from erosion, wave action, storm surges, and sea-level rise.

A collaborative effort from USFWS, USDA, and Maryland DNR has worked over 20 years to eliminate the exotic, invasive nutria, which, combined with sea level rise and land subsidence, have caused over 5,000 acres loss of wetlands. Working closely with public and private landowners, the project managed to remove 14,000 nutria and protect over 250,000 acres of marshes.

Oregon DOT designed several nature-based solutions to protect the 363-mile-long Oregon Coast Highway (U.S. 101) from extreme events and coastal bluff erosion. Three demonstration sites were selected, where cobble beaches were restored to enhance natural wave protection along the backshore.

Supported by NOAA’s Office for Coastal Management, the Shoalwater Bay Tribe, local government, and the North Cove community designed a “dynamic revetment” along the shoreline with rebuilt dunes and placement of cobble berms as part of the local efforts to find effective treatments for severe shoreline erosion, flooding, and sea level rise along Willapa Bay, Washington.

While massive waves attract surfers and visitors to the North Shore of O‘ahu in Hawai‘i, they also cause coastal erosion and high sea level events that threaten coastal residents. Instead of building sea walls, the state took an ecological approach by restoring sand dunes in front of coastal properties.

The Alabama DOT considered a nature-based solution for a bridge replacement and highway realignment project across Mobile Bay, AL. The plan involved using a continuous rock revetment from the edge of the pavement down to the existing bay bottom, complemented by a nature-based solution consisting of stone breakwaters and planted marsh in front of the revetment.

Coastal Louisiana contains around 40% of the wetlands in the continental United States and accounts for approximately 80% of the nation’s wetland loss due to sea-level rise, storm surges, and subsidence. This project restored 1,600 hectares of bald cypress (Taxodium distichum) forest at Pointe-aux-Chenes Wildlife Management Area. 

Deer Island is a barrier island in the Mississippi Sound that protects the city of Biloxi from storm impacts, sea-level rise, and wind impacts. Storms caused a breach in the island, reducing elevation, killing vegetation and eroding beaches. The island was restored using dredged material to increase elevation and nourish beaches.  

An engineer-ecologist team designed a living shoreline tailored to conditions on New England coastlines. After site analysis, the team used coir products (“marsh pillows”) in their living shoreline design. This winter storm-resistant approach slowed the erosion of a 30-foot bank, increased vegetation cover, and protected coastal properties. 

This project is testing the effectiveness of dune restoration as a tactic for combatting sea-level rise and erosion in Southern California. Sand dunes were constructed from locally dredged material and planted with native vegetation. It is projected that this project will successfully protect the shoreline from flooding with no additional sand maintenance until 2050.  

This project will restore dunes on Duxbury Beach to prevent erosion and enhance the beach’s ability to protect communities behind it from storm surges and sea-level rise. 76,633 tons of sand were used to restore the dunes. The dunes were raised to 17ft high, and the tops of the dunes were raised to over 45 feet.  

Two hurricanes in 2004 destroyed Fort Pierce, Florida’s waterfront. This waterfront is a public access space that includes a park and a marina. The city and Tetra Tech Inc. developed a 6-hectare island breakwater system that will protect the city under current conditions and adapt to projected sea-level rise.  

A partnership between the California Coastal Commission and the California Department of Transportation (Caltrans) is working to improve understanding of transportation critical infrastructure vulnerabilities to sea level rise and to adapt the transportation system for greater resilience to those changing conditions over the next century. 

Marine Corps Base Camp Lejeune, near Jacksonville, North Carolina contains over 2600 acres of coastal wetlands that are at risk of drowning due to sea-level rise, low elevation, and limited sediment supply. This project served as an experiment to determine viability of thin-layer placement for marsh restoration in similar locations.  

The Hamilton Wetlands Site, just north of San Francisco, was diked and dried almost a century ago for commercial development. This loss of marsh impacted endangered species and lessened the area’s coastal resilience. This project is restoring marsh functions and ecosystems, as well as creating recreational opportunities. 

Hancock County Marsh Coastal Preserve was the fastest eroding marsh in Mississippi. To reverse this loss and improve the preserve, this project constructed three habitat-restoration components: a 10-kilometer segmented living shoreline, 19 hectares of restored intertidal marsh, and a 19-hectare subtidal reef in Heron Bay. 

Built very close to sea level, Spaulding Rehabilitation Hospital in Boston implemented innovative strategies to keep critical infrastructure and patient care above future flood levels. The hospital incorporated extensive green roofs as part of its feature to reduce stormwater runoff during heavy precipitation.

This project will restore 295 acres of tidal marsh that had severely degraded from erosion, subsidence, storms, and canal and pipeline construction. Marsh restoration will reduce risks from storms and sea-level rise, and improve the coastal resiliency of communities in the Parish.