In addition to the general floodplain standards listed above, uses within the floodway must meet the following applicable standards:
A. No use is permitted in the floodway that would increase the 1% flood hazard elevation, unless approved by the Iowa department of natural resources or its assignee.
B. All uses within the floodway must:
1. Be consistent with the need to minimize flood damage; and
2. Use construction methods and practices that will minimize flood damage; and
3. Use construction materials and utility equipment that are resistant to flood damage.
C. No use is permitted that would 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, must meet the applicable general floodplain management standards and must be constructed and aligned to present the minimum possible resistance to flood flows.
E. Buildings, if permitted, must have low flood damage potential and must not be used for human habitation.
F. Storage of materials or equipment that are buoyant, flammable, explosive or injurious to human, animal or plant life is prohibited. Storage of other material may be allowed if readily removable from the floodway within the time available after flood warning.
G. Watercourse alterations or relocations, including 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 or its assignee.
H. Any fill or stream bank erosion control projects allowed in the floodway must have some beneficial purpose and will be limited to the minimum amount necessary.
I. Pipelines that cross rivers or streams must be buried in the streambed and banks or otherwise sufficiently protected to prevent rupture due to channel degradation and meandering or due to action of flood flows. Where floodway data has been provided in the flood insurance study, such data shall be used to define the floodway limits.
J. Where no floodway data has been provided, the Iowa department of natural resources or its assignee shall be contacted to provide a floodway delineation. Where floodway data is not available, it shall be the responsibility of the permittee to produce engineered data delineating the floodway. (Ord. 10-4414, 11-16-2010)