Beginning at a point where the boundary line between Prince George's and Montgomery Counties is intersected by the center line of Mt. Pisgah Road, thence southeasterly with the center line of Mt. Pisgah Road to the center line of Adelphi Road, thence southeasterly with the center line of Adelphi Road to the center line of Wells Parkway, thence easterly with the center line of Wells Parkway to the center line of Clagett Road, thence easterly with the center line of Clagett Road to the center line of Clagett Pineway, thence easterly with the center line of Clagett Pineway to the center line of Pine Way, thence northerly and easterly with the center line of Pine Way to the center line of Baltimore Avenue (U.S. Rt. 1), thence southerly with the center line of Baltimore Avenue to the common municipal boundary line of College Park and Riverdale Park, thence with said boundary line easterly, northerly and easterly to the center line of Calvert Road, thence southeasterly with the center line of Calvert Road to the center line of Good Luck Road, thence easterly with the center line of Good Luck Road to the center line of Cipriano Road, thence northerly with the center line of Cipriano Road to the center line of Greenbelt Road (Md. 193), thence easterly with the center line of Greenbelt Road to the center line of Soil Conservation Road, thence northerly with the center line of Soil Conservation Road to the center line of Beaver Dam Road, thence westerly with the center line of Beaver Dam Road to the center line of Beaverdam Creek, thence westerly with the center line of Beaverdam Creek to the center line of Edmonston Road (Md. 201), thence northerly with the center line of Edmonston Road to the center line of Sunnyside Avenue, thence westerly with the center line of Sunnyside Avenue to the center line of the Baltimore and Ohio Railroad, thence southerly with the center line of the Baltimore and Ohio Railroad to the center line of the Capital Beltway, thence westerly with the center line of the Capital Beltway to the center line of Cherry Hill Road, thence northwesterly with the center line of Cherry Hill Road to the center line of Powder Mill Road, thence southwesterly with the center line of Powder Mill Road to the boundary line between Prince George's and Montgomery Counties, thence southwesterly with said boundary line to the point of beginning.