The Phase III investigation was conducted within the approximately 2.7-acre historic core of the plantation property located in Oxon Hill, Maryland. It was required by the Historic Preservation Commission (HPC) and the Prince George’s County Planning Department as a condition of the HPC’s approval of the property owner’s, Pinnacle Harbor, LLC, request to remove the site (18PR692) from the county’s Historic Sites and Districts Plan due to approved and permitted construction of a commercial complex on the property. The fieldwork documented changes to the domestic core of the Salubria landscape that includes: 1) its construction, alteration and use during the John H. Bayne period of occupation (c.1830-1870); 2) subsequent modernizing efforts to both Salubria structures and landscape during the late-nineteenth and early-twentieth centuries (c.1880s-1930s); and, 3) significant twentieth century alterations (c.1940s-2003) to structures that have obliterated or obscured earlier archeological contexts.