The U.S. Air Force at Joint Base Andrews, U.S. Army Corps of Engineers, Maryland Department of the Environment, GreenTrust Alliance and GreenVest LLC announced the completion of the first Umbrella Mitigation Banking Instrument for the Department of Defense in Maryland during an event held at The Courses at Andrews, Sept. 6, 2018. The first site to be restored under the UMBI is Mattawoman Creek in Pomfret, which is in Charles County. The entire project yields nearly 38 wetland credits and almost 1,600 stream credits to provide potential mitigation for planned construction efforts on JBA, such as runway construction or expansion.