65-006
Adelphi Mill and Storehouse 8401 and 8402 Riggs Road Adelphi (M-NCPPC)
65-007
Built circa 1796, the principal structure is a twostory stone grist mill on the Northwest Branch of the Anacostia River; it is the oldest and largest mill in the Washington area. A small stone storehouse is built into the slope on the opposite side of the road. The brothers Issachar and Mahlon Scholfield built the mill and storehouse on the tract they renamed Adelphi (Greek for “brothers”) at the end of the eighteenth century. The mill was later owned and operated by George Washington Riggs, founder of the Riggs banking house. Known as the Riggs Mill in the early twentieth century, the last private owners were the McCormick-Goodhart family, who conveyed it to M-NCPPC in 1951. Now restored, it is open to the public as a rental facility.
Langley Park (NR) (McCormick-Goodhart Mansion) 8100 15th Avenue Langley Park
Designed in 1924 by leading Washington, D.C., architect George Oakley Totten, Jr., for AngloAmericans Frederick and Henrietta McCormickGoodhart, the property was named Langley Park after the Goodhart estate in England. It is one of only three such architect-designed estate houses of this period in Prince George’s County. Executed in the Georgian Revival style, the brick and concrete estate mansion is dominated by a two-story pedimented portico with Ionic columns. Abandoned and in disrepair for many years, it has now been restored for use as a multicultural center by CASA de Maryland using federal and state historic building rehabilitation tax incentives. 38