Ordinance 3766-20 - Laserfiche WebLink

a) For all substantially damaged residential structures, other than farmhouses, located in a designated floodway,the Floodplain Administrator may make a written request that the Department of Ecology assess the risk of harm to life and property posed by the specific conditions of the floodway. Based on analysis of depth,velocity,flood-related erosion,channel migration, debris load potential,and flood warning capability,the Department of Ecology may exercise best professional judgment in recommending to the local permitting authority repair, replacement,or relocation of a substantially damaged structure consistent with WAC 173-158-076.The property owner shall be responsible for submitting to the local government and the Department of Ecology any information necessary to complete the assessment.Without a favorable recommendation from the department for the repair or replacement of a substantially damaged residential structure located in the regulatory floodway, no repair or replacement is allowed per WAC 173-158-070(1). b) Before the repair, replacement, or reconstruction is started,all requirements of the NFIP,the state requirements adopted pursuant to 86.16 RCW,and all applicable local regulations must be satisfied. In addition,the following conditions must be met: i. There is no potential safe building location for the replacement residential structure on the same property outside the regulatory floodway. ii. A replacement residential structure is a residential structure built as a substitute for a legally existing residential structure of equivalent use and size. iii. Repairs, reconstruction, or replacement of a residential structure shall not increase the total square footage of floodway encroachment. iv. The elevation of the lowest floor of the substantially damaged or replacement residential structure is a minimum of one foot higher than the BFE. v. New and replacement water supply systems are designed to eliminate or minimize infiltration of flood water into the system. vi. New and replacement sanitary sewerage systems are designed and located to eliminate or minimize infiltration of flood water into the system and discharge from the system into the flood waters. vii. All other utilities and connections to public utilities are designed, constructed,and located to eliminate or minimize flood damage. 4. All Other Building Standards Apply in the Floodway. If Section 19.30.090.D.1(no rise standard)is satisfied or construction is allowed pursuant to Section 19.30.090.D.2,all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of Section 19.30.090, Provisions For Flood Hazard Reduction. 5. Critical Facility.Construction of new critical facilities shall be,to the extent possible, located outside the limits of the SFHA(100-year floodplain).Construction of new critical facilities shall be permissible within the SFHA if no feasible alternative site is available.Critical facilities constructed within the SFHA shall have the lowest floor elevated three feet above BFE or to the height of the 500-year flood,whichever is higher. Access to and from the critical facility should also be protected to the height utilized above. Floodproofing and sealing measures must be taken to ensure that toxic substances will not be displaced by or released into floodwaters.Access routes elevated to or above the level of the BFE shall be provided to all critical facilities to the extent possible. 6. Livestock Sanctuaries. Elevated areas for the for the purpose of creating a flood sanctuary for livestock are allowed on farm units where livestock is allowed. Livestock flood sanctuaries shall be sized appropriately for the expected number of livestock and be elevated at least one foot above the BFE to protect livestock. Proposals for livestock flood sanctuaries shall meet all procedural and substantive requirements of this chapter. 19.30.100 Variances 16