The long-range management objective for the Scarborough Marsh is to provide suitable habitat for optimum levels of all wildlife species and to provide maximum utilization of the area by sportsmen and other individuals seeking outdoor recreation. The marsh is Maine ’s largest and most renowned salt marsh and is recognized for high biological productivity and diversity. The marsh provides habitat for estuarine and catadromous fish species, and supports state and federally-listed threatened or endangered species.
Restriction of the natural tidal flow by railroads, and public and private roads, historical salt hay production drainage ditches and farm roads had created tidal restrictions and excessive drainage. This had caused loss of natural tidal pools, ecosystem functions and values and had allowed invasive vegetation to alter the marshes, reducing their value as a habitat and as a resource for the marine environment.