The board of trustees shall take into account flood hazards, to the extent that they are known in all official actions related to land management, use and development.
   A.   New subdivisions, manufactured home parks, annexation agreements, and planned unit developments (PUDs) within the SFHA shall be reviewed to assure that the proposed developments are consistent with sections 12-1-6, 12-1-7, 12-1-8, and 12-1-9 of this chapter and the need to minimize flood damage. Plats or plans for new subdivisions, mobile home parks and planned unit developments (PUDs) 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 1 .
   B.   Proposals for new subdivisions, manufactured home parks, travel trailer parks, planned unit developments (PUDs) and additions to manufactured home parks and additions to subdivisions shall include base flood or 100-year frequency flood elevation data and floodway delineations. Where 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 or 100-year frequency flood elevation per subsection 12-1-5D of this chapter and the floodway delineation per the definition in section 12-1-2 of this chapter. The applicant's engineer shall submit the data to IDNR/OWR for review and approval as best available regulatory data and then send it to the state water survey.
   C.   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. Wherever possible, the floodplains shall be included within parks or other public grounds.
   D.   The board of trustees shall not approve any planned unit development (PUD) or plat of subdivision located outside the corporate limits unless such agreement or plat is in accordance with the provisions of this chapter.
   E.   All other activities defined as development shall be designed so as not to alter flood flows or increase potential flood damages. (Ord. 2005-11, 5-16-2005)



1. 765 ILCS 205/2.