FP25-005 Staff Decision - Laserfiche WebLink

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base flood elevation is not available, the finished floor, including basement, shall be elevated on a permanent foundation to two feet above highest adjacent natural grade (within five feet) of the building site; The applicant understands this criterion and has two potential locations surveyed for elevations. Either location will require the bottom of the longitudinal chassis be elevated at least 6’ above grade. Final confirmation by way of an elevation certificate shall be a condition of approval. 3. Manufactured dwellings shall be anchored in accordance with subsection (D) of this section; and all electrical crossover connections shall be a minimum of one foot above the base flood elevation; The applicant representative attests that the manufactured home will be anchored in accordance with subsection D of this section. Engineer certification of compliance with these standards shall be a condition of approval. 4. No new residential structures, including manufactured dwellings, shall be placed in a floodway. An exception to this prohibition may be granted if a floodplain development permit and variance consistent with MCC 17.178.080 are obtained; The proposed placement of a single-family home will not be located in a floodway. This criterion is met. 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. 2. All manufactured dwellings must likewise be anchored to prevent flotation, collapse or lateral movements, and shall be installed using methods and practices that minimize flood damage. Anchoring methods may include, but are not limited to, use of over-the-top or frame ties to ground anchors. Anchoring methods shall be consistent with the standards contained in the Oregon Manufactured Dwelling Installation Specialty Code. The applicant representative attests to compliance with this standard, and engineer certification shall be a conditional 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 applicant representative attests to compliance with this standard. The criterion is met. 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 in 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 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.