§ 82-28.1012. Coastal high hazard areas.

Within coastal high hazard areas established in Section 82-28.604, the following standards shall apply:

(1)

All new construction and substantial improvements shall be elevated on adequately anchored pilings or columns and securely anchored to such pilings or columns so that the lowest horizontal portion of the structural members of the lowest floor (excluding the pilings or columns) is elevated to or above the base flood elevation plus required freeboard. In the San Francisco Bay Delta Estuarine Region 0.6 meter (two feet) of freeboard is required. In all other unincorporated areas of the county, 0.3 meter (one foot) of freeboard is required. The pile or column foundation, and structure attached hereto, shall be anchored to resist flotation, collapse or lateral movement due to the effects of wind and water loads acting simultaneously on all building components. Water loading values used shall be those associated with the base flood plus freeboard. Wind loading values used shall be those required by applicable state or local building standards.

(2)

All new construction shall be located on the landward side of the reach of mean high tide.

(3)

All new construction and substantial improvements shall have the space below the lowest floor free of obstructions or constructed with breakaway walls. Such temporarily enclosed space shall not be used for human habitation.

(4)

Fill shall not be used for structural support of buildings.

(5)

Manmade alteration of sand dunes which would increase potential flood damage is prohibited.

(6)

The floodplain administrator shall obtain and maintain the following records:

(a)

Certification by a registered engineer or architect that a proposed structure complies with Section 82-28.1012(1); and

(b)

The elevation (in relation to mean sea level) of the bottom of the lowest structural member of the lowest floor (excluding pilings or columns) of all new and substantially improved structures; and whether such structures contain a basement.

(Ords. 2000-33, 99-35, 96-11, 90-118, 88-50, 87-45).