The FMMR FUDS, originally known as the Cape Henlopen Military Reservation, was part of the Harbor Defenses of the Delaware Bay during World War I and World War II (WWII). During both wars, the mission of the Harbor Defenses was to ensure freedom of movement of U.S. naval vessels in and out of Delaware Bay and to deny enemy access to the Bay and Delaware River. The Department of Defense (DoD) closed the former FMMR in 1958, transferring it to the State of Delaware, making it a FUDS.

The December 2007 Decision Document established Remedial Action Objectives to minimize this explosive safety risk at MRSs 7, 8, and 9 to ensure protection of human health, public safety and the environment. The selected remedy for the areas with low to moderate risk was Removal of MEC to Detection Depth with Land Use Controls. The remedial action activities were conducted within MRSs 7, 8, and 9 to address munitions and explosives of concern (MEC) removal to instrument detection depth between November 2007 – March 2008. The removal area totaled approximately one acre in MRS 7, ten acres in MRS 8, and 22 acres in MRS 9. The Long-Term Management Plan which is the framework for implementing the Land Use Controls was created in 2008.

This FYR, conducted by the U.S. Army Corps of Engineers, Baltimore District, concludes that the remedy implemented at MRSs 7, 8, and 9 remains protective of human health and the environment.