18.48.090 Nonresidential construction.
New construction and substantial improvement of any commercial, industrial or other nonresidential structure shall either have the lowest floor, including basement, elevated at or above the base flood elevation; or, together with attendant utility and sanitary facilities, shall:
(1) Be flood proofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water;
(2) Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy;
(3) Be certified by a registered professional engineer or architect that the design and methods of construction are in accordance with accepted standards of practice for meeting provisions of this section based on their development and/or review of the structural design, specifications and plans. Such certifications shall be provided to the city planner and building official;
(4) Nonresidential structures that are elevated, not flood proofed, must meet the same standards for space below the lowest floor as described in NBCC 18.48.080(2);
(5) Applicants flood proofing nonresidential buildings shall be notified that flood insurance premiums will be based on rates that are one foot below the flood proofed level. Buildings flood proofed to the base flood level will be rated as one foot below;
(6) For flood proofed nonresidential buildings, applicants shall supply:
(a) A maintenance plan for the entire structure to include but not be limited to: exterior envelope of structure; all penetrations to the exterior of the structure; all shields, gates, barriers, or components designed to provide flood proofing protection to the structure; all seals or gaskets for shields, gates, barriers, or components; and the location of all shields, gates, barriers, and components as well as all associated hardware, and any materials or specialized tools necessary to seal the structure; and
(b) An emergency action plan (EAP) for the installation and sealing of the structure prior to a flooding event that clearly identifies what triggers the EAP and who is responsible for enacting the EAP. (Ord. 2027 § 1, 2018)