(A) The subdivider shall cause engineering plans and specifications to be prepared for all improvements required or regulated by this chapter. Those improvements shall be designed to conform to the minimum standards set forth in this chapter and shall also conform to the minimum standards and requirements of other local, state, and federal authorities which have jurisdiction over the subdivision, Engineering plans and specifications shall be prepared under the supervision of a professional engineer licensed in Illinois and shall bear the engineer's seal and signature.
(B) Plan dimensions shall be 24 inches by 36 inches or 11 inches by 17 inches. Variations in dimensions may be approved by the City Engineer, if requested prior to submission of plans.
(C) The subdivider shall submit engineering plans and specifications to the City Engineer for review and written approval, prior to the commencement of construction of any improvements required or regulated by these regulations. The subdivider shall submit with the engineering plans and specifications an "Application for Approval of Engineering Plans and Specifications", copies of which may be obtained from the City Administrator. The application shall include, but not be limited to:
(1) Written requests for waiver of minimum materials and construction standards, describing the degree of deviation, the necessity or advantage of it, and the alternate plan.
(2) The signed statement of the subdivider that the individual authorizes the subdivider's engineer to provide sufficient inspection to certify that the improvements required or regulated by these regulations are constructed and inspected in accordance with these regulations and other applicable ordinances of the city and a written understanding by the subdivider's engineer that the engineer shall provide such inspection service.
(D) The City Engineer shall review engineering plans and specifications for conformance to these regulations.
(E) When a subdivision or part thereof is located in a flood prone area as designated by the Federal Insurance Administration, the subdivider shall provide at his own expense such hydrologic design data and calculations and utility and drainage plans as may be required by the necessary permitting agencies and the City Engineer to assure that the subdivision is consistent with the need to minimize or eliminate flood damage.
(F) The subdivider's engineer shall prepare a drainage study detailing the requirements of § 154.37 and certificate, hereafter called subsidiary drainage plat in accordance with S.H.A. Ch. 109, as amended and as may hereafter be amended, and shall submit the subsidiary drainage plat to the City Engineer for approval.
(G) The City Engineer shall notify, in writing, the subdivider and the City Administrator of approval or disapproval of the engineering plans and specifications and the subsidiary drainage plat. Such notification, specifying reasons for disapproval shall be made within 20 working days, excluding holidays, of the date of submission of plans, specifications, and plats required by this section. Construction of improvements required or regulated by these regulations shall not commence until the City Engineer has approved in writing engineering plans and specifications for those improvements, hydrologic design data as may be required by division (E) above, and the subsidiary drainage plat.
(H) If in the course of construction the subdivider wishes to modify the size, type, quality, quantity, or location of any or all of the improvements required or regulated by these regulations, the subdivided engineer shall submit a written change request to the City Engineer for review and written approval prior to proceeding with installation of the modified improvement.
(I) Approval of the engineering plans and specifications and the subsidiary drainage plat is a prerequisite to submission of the final plat.
(Ord. 81-0-19, passed 5-11-81; Am. Ord. 2011-O-4, passed 3-14-11)