§ 11-24. Standards for streams without base flood elevations and floodways.

Located within the areas of special flood hazard and community flood hazard areas established in article III, section 11-8 and section 11-9, where no base flood data and floodway data have been provided, the following provisions in addition to the standards of article V, section 11-22 apply:

(1)

Require that all new subdivision proposals and other proposed developments (including proposals for manufactured home parks and subdivisions) greater than five (5) lots or five (5) acres, whichever is lesser, include within such proposals base flood elevation data;

(2)

The floodplain administrator shall obtain, review, and reasonably utilize any base flood elevation and floodway data available from a federal, state, or other source, in order to administer the provisions of article V. When such data is available, standards of article V, section 11-23 shall apply. If data is not available from article V, section 11-24(1) or outside sources, then the following provisions shall apply.

(3)

No encroachments, including fill material or other development, shall be located within a distance of the stream bank equal to five (5) times the width of the stream at the top of the bank or twenty (20) feet each side from the top of the bank, whichever is greater, unless certification by a registered professional engineer is provided demonstrating that such encroachment shall not result in any increase in flood levels during the occurrence of the base flood discharge. The enclosure standards of article V, section 11-23(4) shall apply.

(4)

The floodplain administrator shall require that the applicant develop the base flood elevation for the development site, utilizing accepted engineering practices and procedures. Upon review of the submitted data, the administrator may accept or reject the proposed base flood elevation. When such data is accepted, standards of article V, sections 11-23, shall apply.

(5)

When base flood elevation data and floodway data are not available in accordance with article III, section 11-8, in special flood hazard areas and community flood hazard areas without base flood elevation data, new construction and substantial improvements shall be elevated or floodproofed to elevations established by the community. The enclosure standards of article V, section 11-23(4) shall apply.

(6)

Notify, in riverine situations, adjacent communities and the State Coordinating Office prior to any alteration or relocation of a watercourse, and submit copies of such notifications to FEMA. Assure that the flood carrying capacity within the altered or relocated portion of any watercourse is maintained.

(7)

Require that all manufactured homes be placed or installed using methods and practices which minimize flood damage. Manufactured homes must be elevated and anchored to resist flotation, collapse, or lateral movement.

(Ord. of 2-2-10(1), § 2)