FP24-006 Staff Decision - Laserfiche WebLink

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Nonresidential structures that are elevated, not floodproofed, must meet the same standards for space below the lowest floor as described in subsection (A)(5) of this section. Applicants floodproofing nonresidential buildings shall be notified by the zoning administrator that flood insurance premiums will be based on rates that are one foot below the floodproofed level (e.g., a building constructed to the base flood level will be rated as one foot below that level). An elevation certificate from 2011 for the existing building shows a Base Flood Elevation (BFE) of 238, and a floor elevation of 237.2. The applicant explains that elevation of the proposed shop would create issues for forklifts carrying steel components. The applicant proposes wet-floodproofing instead of elevation or floodproofing. Variance criteria for wet-floodproofing are addressed in section 10 of this document. The provision of engineering certification that 16.19.140(C)(1)(a-c) have been met shall be a condition of approval. (D) Anchoring. 1. All new construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy. The provision of this certification shall be condition of approval. (E) Construction Materials and Methods. 1. All new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage, and the design and methods of construction are in accord with accepted standards of practice based on an engineer’s or architect’s review of the plans and specifications. 2. All new construction and substantial improvements shall be constructed using methods and practices that minimize flood damages. The provision of this certification shall be a condition of approval. (F) Utilities. 1. All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of floodwaters into the system as approved by the State Health Division. 2. New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the systems and discharge from the systems into floodwaters. 3. On-site waste disposal systems shall be designed and located to avoid impairment to them or contamination from them during flooding consistent with the requirements of the Oregon State Department of Environmental Quality. 4. Electrical, heating, ventilation, plumbing, duct systems, air conditioning, and other equipment and service facilities not installed so as to prevent water from entering or accumulating within the components during conditions of the base flood shall be elevated to one foot above the level of the base flood elevation. Where the base flood elevation is not available, the electrical, heating, ventilation, plumbing and air conditioning equipment shall be elevated to one foot above the highest adjacent natural grade (within five feet) of the building site. If replaced as part of a substantial improvement the utility equipment and service facilities shall meet all the requirements of this subsection. The provision of this certification shall be a condition of approval. (H) Storage of Materials and Equipment. Materials that are buoyant, flammable, obnoxious, toxic or otherwise injurious to persons or property, if transported by floodwaters, are prohibited. Storage of materials and equipment not having these characteristics is permissible only if the materials and