Amending an Ordinance approved December 15, 1969, as amended, which approved the redevelopment proposal, the urban renewal plan and the relocation plan of the Redevelopment Authority of the City of Philadelphia for the redevelopment of Grays Ferry Urban Renewal Area, by approving the tenth amendment of the redevelopment proposal and the urban renewal plan, which provide, inter alia, for certain changes, namely: the acquisition of approximately three (3) additional properties as well as the former railroad rights-of-way on the south side of Grays Ferry avenue between Thirty-fourth street and Th — Open Common Ground