In the event that the owners of any real estate abutting upon the portion of any street or alley sought to be vacated object to such vacation (exclusive of petitioners), the city council shall not vacate such street or alley or portion thereof without (1) determining the extent of the damage or injury to any objecting abutting owner whose vested rights shall be affected by such vacation and (2) making provision for the compensation thereof. (Ord. 4654 § 57, 1994. Formerly 20.30L.140.)