Authorizing the revision of lines and grades on a portion of City Plan No. 238 by relocating the southeasterly houseline and curbline of Christopher Columbus Boulevard, from Washington Avenue to Christian Street, thereby creating a more uniform right-of-way width and continuous footway area for said Christopher Columbus Boulevard from Washington Avenue to Christian Street, placing on the City Plan an irregularly-shaped area at the terminus of said Washington Avenue, east of Christopher Columbus Boulevard, reserving and placing on the City Plan a right-of-way for various utility purposes within