Authorizing the relocation of the southwesterly curbline of Ridge Avenue, from Calumet Street to a point northwestwardly therefrom, and the northwesterly curbline of Calumet Street, from Ridge Avenue to Kelly Drive, on City Plan No. 163, authorizing the plotting on said City Plan of an area for public pedestrian use extending along the northwesterly side of Calumet Street, from Ridge Avenue to a point southwestwardly therefrom, and authorizing acceptance of the grant to the City of the said area for public pedestrian use, all under certain terms and conditions.