The regulations set forth in this section or elsewhere in this ordinance which are applicable, shall apply in the FW Floodway Overlay District.
1. Principal Permitted Uses. The following uses shall be permitted within the FW Floodway Overlay District to the extent they are not prohibited by any other ordinance (or underlying zoning district) and provided they do not include placement of structures, buildings, factory built homes, fill or other obstruction, the storage of materials or equipment, excavation, or alteration of a watercourse.
A. Agricultural uses such as general farming, pasture, grazing, outdoor plant nurseries, horticulture, viticulture, aquaculture, truck farming, forestry, sod farming, wild crop harvesting, but not including livestock feed lots or poultry farms.
B. Private and public recreational uses such as golf courses, tennis courts, driving ranges, archery ranges, picnic grounds, boat launching ramps, swimming areas, parks, wildlife and nature preserves, game farms, fish hatcheries, fishing areas, hiking, biking and horseback riding trails.
C. Open space uses such as lawns and gardens.
D. Such other open-space uses similar in nature to the above uses.
2. Permitted Accessory Uses. The following uses may exist as part of, or in accessory to the principal permitted uses:
A. Accessory uses customarily incidental to a principal permitted use, provided all restrictions on development in the FW District shall apply to any accessory uses.
B. Floating and removable docks for residential uses, provided the standards of Subsection 4 of this section (Performance Standards) are met.
(Ord. 18-20 – May 19 Supp.)
3. Special Uses. The following uses which involve structures (temporary or permanent), fill, storage of materials or equipment may be permitted only upon approval of a special use permit and only when adequate public liability insurance is provided. Such uses must also meet the applicable provisions of the Floodway District Performance Standards and the standards allowed usage of the appropriate underlying zoning district.
A. Extraction of sands, gravel, and other materials.
B. Marinas, boat rentals, permanently installed docks, piers, and wharves.
C. Utility transmission lines and underground pipelines.
D. Other uses similar in nature to uses described in this subsection which are consistent with the provisions and the general spirit and purpose of this subsection.
(Ord. 18-20 – May 19 Supp.)
4. Performance Standards. All FW Floodway Overlay Zoning District uses allowed as a principal permitted use, accessory use or special use, shall meet the following standards:
A. No use shall be permitted in the FW Floodway Overlay Zoning District that would result in any increase in the one hundred (100) year flood level. Consideration of the effects of any development on flood levels shall be based upon the assumption that an equal degree of development would be allowed for similarly situated lands.
B. All uses within the FW District shall:
(1) Be consistent with the need to minimize flood damage.
(2) Use construction methods and practices that will minimize flood damage.
(3) Use construction materials and utility equipment that are resistant to flood damage.
C. No use shall affect the capacity or conveyance of the channel or floodway or any tributary to the main stream, drainage ditch, or any other drainage facility or system.
D. Structures, buildings, and sanitary and utility systems, if permitted, shall meet the applicable performance standards of the FF Floodway Fringe Overlay Zoning District and shall be constructed or aligned to present the minimum possible resistance to flood flows.
E. Buildings, if permitted, shall have a low flood damage potential and shall not be for human habitation.
F. Storage of materials or equipment that are buoyant, flammable, explosive, hazardous, or injurious to human, animal, or plant life is prohibited. Storage of other material may be allowed if readily removable from the FW District within the time available after flood warning.
G. Watercourse alterations or relocations (channel changes and modifications) must be designed to maintain the flood carrying capacity within the altered or relocated portion. In addition, such alterations or relocations must be approved by the Iowa Department of Natural Resources.
H. Any fill allowed in the FW District shall not increase the one hundred (100) year flood profile.
I. Pipeline crossings of streams or rivers shall be buried in the stream bed and banks or otherwise sufficiently protected to prevent rupture due to channel degradation and meandering or due to the action of flood flows.