Authorizing and directing the revision of lines and grades on a portion of City Plan Nos. 12-S, 19-S, 71, 238, and 308 by revising the curblines and grades of Christopher Columbus Boulevard from a point approximately nine-hundred feet south of Spruce Street to a point approximately one-thousand two-hundred feet south of Tasker Street, by revising the curblines and grades of Tasker Street from Christopher Columbus Boulevard to a point approximately two-hundred fifty feet westwardly therefrom, by striking from the City Plan and vacating Tasker Street from Christopher Columbus Boulevard to a dead — Open Common Ground