8415-93 Amending Chapter 21 Zoning Floodplain Regulations

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B. Within all Special Flood Hazard Areas identified as "Zone A," the following standard shall apply: 1. The total cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the regulatory flood elevation more than one-tenth (0.1) of one foot and will not increase flood damages or potential flood damages. C. Public Health Standards in all Special Flood Hazard Areas: 1. No development in the Special Flood Hazard Area shall include locating or storing chemicals, explosives, buoyant materials, flammable liquids, pollutants, or other hazardous or toxic materials below the Flood Protection Grade, unless such materials are stored in a floodproofed storage tank or building constructed according to the requirements of Section 21-183 of this Ordinance. 2. New and replacement sanitary sewer lines and on-site waste disposal systems may be permitted providing all manholes or other above ground openings are located above the Flood Protection Grade, or those which are located below the Flood Protection Grade are watertight. Sec. 21-183 PROTECTING BUILDINGS In addition to the damage prevention requirements of Section 21-182, all buildings to be located in the Special Flood Hazard Area shall be protected from flood damage below the Flood Protection Grade. A. This building protection requirement applies to the following situations: 1. Construction or placement of any new building greater than 400 square feet or valued at more than $1,000, whichever is less. 2. Structural alterations made to an existing building that increase the market value of the building by more than 50 percent, excluding the value of the land; 3. Any subsequent alterations; 4. Reconstruction or repairs made to a damaged building that are valued at or more than 50 percent of the market value of the building excluding the value of the land before damage occurred; 5. Installing a new manufactured home or mobile home on a new site or a new manufactured home or mobile home on an existing site. This Ordinance does not apply to returning the existing manufactured home or mobile home to the same site it lawfully occupied before it was removed to avoid flood damage; and 6. Installing a recreation vehicle or travel trailer on a site for more than 180 days. B. This building protection requirement may be met by one of the following methods. The Zoning Administrator shall maintain a record of compliance with these building protection standards as required in Section 21-179 of this Ordinance. 1. A residential or nonresidential building may be constructed on a permanent landfill in accordance with the following: (a) The fill shall be placed in layers no greater than 1 foot deep before compacting to 95 percent of the maximum density obtainable with the Standard Proctor Test method. (b) The fill should extend at least ten feet beyond the foundation of the building before sloping below the Flood Protection Grade. (c) The fill shall be protected against erosion and scour during flooding by vegetative cover, riprap, or bulkheading. If vegetative cover is used, the slopes shall be no steeper than 3 horizontal to 1 vertical.