10-4-160 Laying out of alleys.

   Whenever land is subdivided within the corporate limits of the city there shall also be laid out public alleys of a minimum width of 16 feet in the rear of all lots in such subdivisions.

(Prior code § 30-16)

10-4-170 Variations.

   In areas of the city where the foregoing requirements in relation to subdivisions cannot consistently be carried out, the arrangement, location and width of the public streets and alleys shall conform as nearly as may be to the surrounding territory, and such variation therefrom as may be necessary shall be subject to the discretion of the commissioner of transportation, responsible for maps and plats.

(Prior code § 30-17; Amend Coun. J. 9-10-97, p. 51502, § 7)

ARTICLE IV. STREET GRADES (10-4-180 et seq.)

10-4-180 Grades established.

   Street grades shall be established along the curblines of the streets and shall run in a straight line from the established grade at any street intersection to the established grade at the intersection of the next street thereto, or to any established street grade between the intersections of such streets. The term "intersection of streets" shall be taken as the intersection of curblines and curblines produced at all intersecting and abutting streets.

   All ordinances fixing the grades of streets in the city shall be referred to the commissioner of water management, and shall be passed by the city council only upon the recommendation of said commissioner.

(Prior code § 30-18; Amend Coun. J. 11-8-12, p. 38872, § 180)

10-4-190 Public works and public improvements.

   All public works and public improvements shall be constructed in conformity with the street grade elevations established by the city council.

(Prior code § 30-19)

10-4-200 Unpaved alleys.

   The grades of the sidelines of each unpaved alley in the city at its intersection with streets shall conform to the sidewalk grades of said streets, respectively, and from said intersections shall rise at the rate of six inches in each 100 feet to meet at a summit.

(Prior code § 30-20)

10-4-210 City datum.

   The city datum is hereby established as a plane 17.640 feet below the bench mark cut on top of the bottom stone of granite base at the southeast corner of the Northern Trust Company Bank Building at the northwest corner of S. La Salle Street and W. Monroe Street.

(Prior code § 30-21)

10-4-220 Defacement of bench monuments.

   It shall be unlawful for any person to cover up, conceal, deface, obliterate, or in any manner to injure, erase, disfigure or change, the location of any of the standard bench monuments which have heretofore been established or which may hereafter be established by the city.

   Any person who shall violate any of the provisions of this section shall be fined not less than $100.00 nor more than $1,000.00 for each offense.

(Prior code § 30-22)