The survey made by Thomas McClanahan, a civil engineer under the laws of Illinois in 1895, of the streets of the village and the grade established by him in said survey, according to the profile and field notes now on file in the office of the village clerk, is hereby adopted as the grade for streets of the village and streets abutting thereto. All plats of property in effect at the effective date hereof are hereby readopted as official plats. (1993 Code p. 60 § 403.3-16)