(a) Review required. New subdivisions, manufactured home parks, annexation agreements and planned developments within the SFHA shall be reviewed to assure that the proposed developments are consistent with §§ 9-98 through 9-101 and the need to minimize flood damage. Plats or plans for new subdivisions, manufactured home parks, and planned developments shall include a signed statement by a registered professional engineer that the plat or plans account for changes in the drainage of surface waters in accordance with the Plat Act, 765 ILCS 205.
(b) Required information. All proposals for new subdivisions, planned developments, additions to manufactured home parks, and additions to subdivisions shall include base flood elevation data and floodway delineations. When this information is not available from an existing study filed with the Illinois State Water Survey, the applicant's engineer shall be responsible for calculating the base flood elevation in accordance with § 9-97(e) and (f) and the floodway delineation as defined in § 9-95 and submitting it to the State Water Survey and OWR for review and approval as best available regulatory data.
(c) Required layout. Streets, blocks, lots, parks and other public grounds shall be located and laid out in such a manner as to preserve and utilize natural streams and channels. Whenever possible, the floodplains shall be included within parks or other public grounds.
(d) Board approval. The board of trustees shall not approve any planned development or plat of subdivision located outside the corporate limits unless such agreement or plat is in accordance with the provisions of this article XIV.