Chapter 27 Flood Plain Management

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§ 27-18 HAWAII COUNTY CODE (c) (3) New construction, improvements to repetitive loss structures, and substantial improvement shall be designed and constructed with electrical, heating, ventilation, plumbing, air-conditioning equipment, and other service facilities including, but not limited to, furnaces, heat pumps, water heaters, washers, dryers, elevator lift equipment, electrical junction boxes, circuit breaker boxes, and food freezers located above the base flood elevation plus any required freeboard. (4) Within Zones V and VE, new construction, improvements to repetitive loss structures, and substantial improvements shall comply with the standards of section 27-23. (5) Recreational vehicles placed on sites within Zones AH and AE on the FIRM shall be elevated and anchored or be on the site for less than one hundred eighty consecutive days or be fully licensed and highway ready. Encroachments. (1) Within a floodway, encroachments (including fill), new construction, improvements to repetitive loss structures, substantial improvements, and other developments, shall be prohibited unless certified by a professional civil engineer licensed in the State of Hawai`i, with supporting data, that the encroachment will not cause any increase in base flood elevations during the occurrence of the base flood discharge. (2) Require, until a regulatory floodway is designated, that no new construction, improvements to repetitive loss structures, substantial improvements, or other development (including fill), shall be permitted within Zones AE on the FIRM, unless demonstrated that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the water surface elevation of the base flood at any point. (3) Within all zones of special flood hazards, but not including floodways, filling which would result in the blockage or impediment of flow and/or induce or aggravate flooding shall be prohibited unless certified by a professional civil engineer licensed in the State of Hawai`i, with supporting data, that the encroachment will not cause any increase in base flood elevations during the occurrence of the base flood discharge. (4) Within floodway fringe areas, filling to elevate the lowest floor of a nonresidential structure may only be permitted where the structure: (A) Is floodproof'ed so that below the base flood elevation plus any required freeboard the structure is watertight with walls substantially impermeable to the passage of water, and (B) Has structural components capable of resisting hydrostatic and hydrodynamic loads and the effects of buoyancy. (5) In Zones V and VE, use of fill for structural support of buildings shall be prohibited. 27-18