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 eleventh amendment of the redevelopment proposal and the urban renewal plan, which provide, inter alia, for certain changes, namely: the acquisition of approximately two (2) additional properties, the expansion of the boundaries of the urban renewal area beginning at the northwest corner of 25th and Wharton Street — Open Common Ground