Blackwater National Wildlife Refuge Using Thin Layering Technique

This photo taken at Blackwater NWR provides a good illustration of layer placement, a technique where a slurry of dredge material (typically) is applied in thin layers, usually 6–10 inches thick, in order to raise the elevation of a marsh surface. This allows the marsh to combat sea level rise, and buys time to allow important habitats to persist for imperiled species such as the Eastern Black Rail.