The Mattawoman Creek Headwaters Preserve is located south of Indian Head Highway (MD 210) in Charles County, Maryland. This project is in the Lower Potomac watershed. The property has been a working farm since the 1600s and has been subject to numerous historic manipulations of drainage, hydrology and vegetation to create and enhance crop lands and pasture.  These manipulations include wetland grid ditching and the intentional relocation of a perennial creek from valley center to valley side.  The project site was identified in 2014 as part of the development of the Mattawoman Creek Umbrella Mitigation Banking Instrument (UMBI), enacted in 2018.
This project, currently under construction, will restore and permanently protect approximately 81 acres of forested, freshwater wetland and upland habitat in a MDE, USACE and EPA recognized priority restoration and Tier II watershed. The restored habitat will be fully integrated into the surrounding forested, wetland and upland habitat, which collectively comprise critical headwater resources that support the chemical, physical and biological integrity of Mattawoman Creek and its watershed. Planned restoration for this site includes wetland creation, restoration, and preservation; upland enhancement and preservation; nontidal wetland buffer creation, enhancement, and preservation; and stream restoration. Construction on this site began in July 2018.