Authorizing the revision of lines and grades on a portion of City Plan Nos. 11-S, 42, 269, and 308 by relocating the houselines and curblines of South Street from a point approximately one-hundred seventy feet northwest of Convention Avenue to the northwesterly Pierhead and Bulkhead Line of the Schuylkill River and from the southeasterly Pierhead and Bulkhead Line of the Schuylkill River to Twenty-seventh Street so as to increase the width of South Street for the purpose of constructing a new bridge crossing the Schuylkill River and by placing on the City Plan a variable width right-of-way for — Open Common Ground