NEW CONSTRUCTION and SUBSTANTIAL IMPROVEMENT of any commercial, industrial or other nonresidential STRUCTURE shall either have the LOWEST FLOOR, including BASEMENT, elevated to the level of the BASE FLOOD ELEVATION, or together with attendant utility and sanitary facilities, shall:
A. Be FLOODPROOFED so that below the BASE FLOOD level of the STRUCTURE is watertight with walls substantially impermeable to the passage of water;
B. Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy;
C. 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 subsection based on their development and/or review of the structural design, specifications and plans. Such certifications shall be provided to the official as set forth in subsection 15.04.180B of this chapter.
D. Nonresidential STRUCTURES that are elevated, not FLOODPROOFED, must meet the same standards for space below the LOWEST FLOOR as described in subsection 15.04.300B of this chapter.
E. Applicants FLOODPROOFING nonresidential STRUCTURES shall be notified that flood insurance premiums will be based on rates that are one foot (1') below the FLOODPROOFED level (e.g., a building constructed to the BASE FLOOD level will be rated as 1 foot below that level). (Ord. 96 § 5.2-2, 1987; amd. Ord. 254, 7-12-2021)