Board of Adjustment Agenda and Packet 2016 12 21

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Board of Adjustment Meeting Minutes November 16, 2016 Page 6 of 12 Staff finds application complies Finished floor must be at least 1 -foot above base flood elevation or structure must be floodproofed below this elevation. Finished floor is 5456.10, below base flood elevation of 5456.83. Therefore, Applicant proposes floodproofing. Study provides certification this floodproofing and other structural requirements will be done. Staff finds application complies Staff Recommendations: Staff recommends approval as submitted and that the Board makes a motion for approval and adoption of the findings and analysis in the November 16, 2016 Staff memorandum. Commission Questions of Staff: Campbell says you mentioned two elevations. Can you repeat them? Zuccaro says according to the plans, the proposed finished floor elevation of the addition is 5456.1' which is below the base flood elevation of 5456.83'. DeJong says since it is being proposed to be built without the minimum requirement above the floodplain, then floodproofing would be required for both the new and existing structure. Zuccaro says my understanding is only the new addition has to be floodproofed. The requirement in the LMC is if the addition exceeds the value of the existing building by 50% or more, then you must bring the entire building into compliance. The applicant can confirm it. The City has not verified it and Staff's assumption is the addition is less than 50%. DeJong asks if the City engineers or planning department have received any plans or specifications with regard to the floodproofing as proposed. Zuccaro says we have not received specifications. We anticipate receiving them at the time of building permit and then verify they meet code at the time of building permit review. We have certification in the engineer's report that it will be done. DeJong asks where the certification is in the report and who the certifier is. Zuccaro says it is referenced in th Staff memo, I reference page 10 of the Flood Plain Study, revision date October 26, 2016. T lood Plain Study is one of the attachments to the report. do not have the en. '• --r's name o gineerine ' m but it is an attachment and included in the packet. DeJong says on pag "Pursuant to - 17.56 • of • • icipal Code the addition to 826 Coal Creek Circle wi with proofing meas es for all portions of the building that are below one fo• _ .ve the . loo. .tion. The building will be made watertight with walls that are sub .Ily imperme.. . the age of water by utilizing waterproof coatings, impermeable mem openin and backf will be imple the regulatory Zuccaro says Staff was considering the engineer's report as a commitment to do the floodproofing at construction. As far as a stamped construction drawing certifying compliance, we do not have that at this time. It would be reviewed by the Building department at permitting. Gorsevski says to clarify, the scope of our review and the permit we would be issuing would authorize them to proceed through the additional regulatory processes that the City has in place. What we are authorizing is for them to proceed through that process and give them the greenlight to proceed in general terms and compliance with the application they have submitted, but that the final criteria and specifications would be determined at a later date. Zuccaro says the floodplain aspects would not be reviewed again until building permit. The rest of the development application would go through a further process. The BOA will make a final determination on the floodplain development permit, which could be appealed to City Council. This is the final determination on the floodplain development permit. The PUD and the platting s, or supplem ow the FPE wi Ives will be d will be lain a layer asonry or concrete. Also, doors, windows, and other equip.ed with permanent or removable shields or flood gates, lied in sewer lines and drains. The flood proofing measures that gned to resist hydrostatic and hydrodynamic forces specific to nt to the structure." I see no evidence of that.