Wallisville Lake Project is a 23000 acre area of protected wetlands, swamp forest, and bottomland hardwood forest created by the U.S. Army Corps of Engineers for salinity control, navigation, water supply, recreation, and fish and wildlife enhancement. The protection of this land is of vital importance to birds. The project, which protects the estuary of the Trinity River system, consists of riparian bottomland forests, fresh and brackish water marshes, cypress swamps, and several natural lakes and rivers, and smaller streams and pools.