Pursuant to the Council on Environmental Quality Regulations (40 CFR Parts 1500-1508) for implementing the procedure provisions of the National Environmental Policy Act (42 U.S.C. 4321 et seq) and Title 32 of the Code of Federal Regulation Part 989 a Supplemental Environmental Assessment (SEA) was prepared by Joint Base Langley-Eustis, Fort Eustis, to evaluate the potential environmental effects associated with the proposed project to control of an invasive plant species the common reed (Phragmiles australis) at Fort Eustis, Virginia. Background. Fort Eustis comprises approximately 7,900 acres of land of which approximately 3,000 acres are tidal and non-tidal wetlands. The common reed (Phragmites australis) continues to expand into more wetlands areas where it out competes native wetlands species thereby reducing the ecological and overall value of these areas. Biodiversity and functions of wetlands are reduced, aesthetics become marred, training opportunities are degraded and security along the installation boundaries becomes compromised.