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AN Ot~DtNANIIE TO AMEND THE CODE OF THE CITY gE POP~TSMOUTH, VIRGI~/A, 1973, BY AMENDIAE SECTIONS 12 1/2-3(a), 12 1/2-5, AND BY ADDING THERETO SECTIONS 12 1/2-6(e), 12 1/2-9, 12 1/2-10. 12 1/2-11: PERTAINING TO FLOOD CONTROL MANAGEMENT. RE IT ORDAtNZD by the Council of the City of Portsmouth, Virginia: 1. That Section 12 1/2-3(a) of the Code of the City of Portsmouth, 1973, be amended to reed as follows: Section 12 1/2-3(a). Flood Hazard District 1 [FH-1). This district is that zone which is subject to the intermediate regional tidal flood. ~his flood has an average frequency of bnce in one hundred (100) years; it produces a flood height or still water-level of eight and one-haLf (8.5) feet above raean sea level, as determined by the U. S. Army Corps of Engineers. Any changes in the delineation of this district are subject to approval by the Federal Insurance Admir~s- trator. 2. That Section 12 1/2-5 of the Code of the City of Portsmouth, 1973, be amended to reed as follows: Section 12 1/2-5. Floodproofing; definition of. Floodproofing, as used herein shall mean one or more structural provisions, changes, or adjustment to property to require all new con- struction end substantial i~provements to be designed so that below the base flood level the structure is watertight with walls substantially impemmeable to the passage of water and with st~lctural components having the capability of resisting hydrostatic and hydrodynamic leeds and effects of buoyancy to eliminate flood damage to structures., con- tents thereof, and water and sanitary facilities. Such m~asures may include but are not limited to the ancbx~raqe of structure to foundations, installation of watertight doors and bulkheads, reinforcement of walls to resist water pressure, the use of pa/nts, membranes or mozTmrs to reduce seepage of water through walls, addition of mass or %~ight to structures to resist flotation, installation of ph-mps to lower water levels in structures, construction of water supply and water treatment syst~s to prevent the entrance of flood water use of pumping facilities for subsurface drainage facilities for b~ldings to relieve external foundation wall and basement floor pressures, and the installation of cutoff valves on sewer lines or elimination of gravity flow basement drains. /m any case, where the adequacy of flood proofing measures shall be in issue, the Building Official shall detenrd~e the matter. A person aggrieved by a ruling of the Building Official may appeal such ruling to the Bosrd of Adjustments end Appeals in accordance with the provisions of Section 127.O through 127.6 of %he BOCA Basic Building