(A) Continuance of nonconformities. A use, structure, or occupancy of land which was lawful before the passage or amendment of this chapter but which is not in conformity with the provisions of this chapter may be continued subject to the following conditions. Historic structures, as defined in § 153.03 of this chapter, are subject to the provisions of division (A)(1) to (4) of this section.
(1) A nonconforming use, structure, or occupancy must not be expanded, changed, enlarged, or altered in a way that increases its nonconformity. There shall be no expansion to the outside dimensions of any portion of a nonconforming structure located within the Floodplain District.
(2) The cost of all structural alterations or additions to any nonconforming structure over the life of the structure may not exceed 50% of the market value of the structure unless the conditions of this section are satisfied. The cost of all structural alterations and additions must include all costs such as construction materials and a reasonable cost placed on all manpower or labor. If the cost of all previous and proposed alterations and additions exceeds 50% of the market value of the structure, then the structure must meet the standards of division (B),below.
(3) If any nonconforming use, or any use of a nonconforming structure, is discontinued for more than one year, any future use of the premises must conform to this chapter. The Assessor must notify the Zoning Administrator in writing of instances of nonconformities that have been discontinued for a period of more than one year.
(4) If any nonconformity is substantially damaged, as defined in § 153.03, above, it may not be reconstructed unless it is located in the flood fringe portion of the floodplain and it is reconstructed in accordance with the standards of division (B), below.
(5) Any substantial improvement, as defined in § 153.03, above, to a nonconforming structure, then the existing nonconforming structure must be located in the flood fringe portion of the floodplain and meet the requirements of division (B), below.
(B) Standards for reconstruction of nonconforming structures. The following standards and procedures apply to nonconforming structures in the flood fringe portion of the floodplain, as allowed under division (A), above.
(1) Elevated on fill. All structures, including manufactured homes, must be elevated on fill so that the lowest floor including basement floor is at or above the regulatory flood protection elevation. The finished fill elevation for structures shall be no lower than one foot below the regulatory flood protection elevation and the fill shall extend at such elevation at least 15 feet beyond the outside limits of the structure.
(2) Proper compaction. Fill must be properly compacted and the slopes must be properly protected by the use of riprap, vegetative cover or other acceptable method.
(3) Hydraulic capacity. Floodplain developments must not adversely affect the hydraulic capacity of the channel and adjoining floodplain of any tributary watercourse or drainage system.
(4) Manufactured homes. All manufactured homes must be securely anchored to an adequately anchored foundation system that resists flotation, collapse and lateral movement. Methods of anchoring may include, but are not limited to, use of over-the-top or frame ties to ground anchors. This requirement is in addition to applicable state or local anchoring requirements for resisting wind forces.
(5) On-site sewage treatment and water supply systems. Where public utilities are not provided: (1) On-site water supply systems must be designed to minimize or eliminate infiltration of flood waters into the systems; and (2) New or replacement on-site sewage treatment systems must be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters and they shall not be subject to impairment or contamination during times of flooding. Any sewage treatment system designed in accordance with the State's current statewide standards for on-site sewage treatment systems shall be determined to be in compliance with this section.
(6) Certification. The applicant is required to submit certification by a registered professional engineer, registered architect, or registered land surveyor that the finished fill and building elevations were accomplished in compliance with the provisions of this chapter. Floodproofing measures must be certified by a registered professional engineer or registered architect.
(7) Record of first floor elevation. The Zoning Administrator must maintain a record of the elevation of the lowest floor (including basement) of all new structures and alterations to existing structures in the floodplain. The Zoning Administrator must also maintain a record of the elevation to which structures and alterations or additions to structures are floodproofed.
(Ord. 907, passed 8-8-2017)