sentences:  Representatives from local, state and federal governments have teamed together with non-profit wildlife organizations, business, and industry to create a Special Area Management Plan to help change the downward trend in bird populations at Fort Delaware State Park.Since Beach erosion affecting Pea Patch Island was recognized as a potential threat to the Fort in 1999, the United States Army Corps of Engineers erected a seawall during the winter of 2005-2006.The following state parks are within of Fort Delaware State Park