ZONING REGULATIONS OF THE TOWN OF WILTON, CONNECTICUT

29-9.Fconsidered to occur when the first alteration of any wall, ceiling, floor,or other structural part of the building commences, whether or not thatalteration affects the external dimensions of the structure. The termdoes not, however, include either: (1) Any project for improvement ofa structure to correct existing violations of state or local health,sanitary, or safety code specifications which have been identified bythe local code enforcement official and which are the minimum toassure safe living conditions; or (2) Any alteration of a “historicstructure”, provided that alteration will not preclude the structure’scontinued designation as a “historic structure”.28. VARIANCE: A grant of relief by a community from the terms of thefloodplain management regulation that allows construction in amanner otherwise prohibited and where specific enforcement wouldresult in unnecessary hardship.29. VIOLATION: Failure of a structure or other development to be fullycompliant with the community’s floodplain management regulations.A structure or other development without required permits, lowestfloor elevation documentation, flood-proofing certificates of requiredfloodway encroachment calculations is presumed to be in violationuntil such time documentation is provided.30. WATER SURFACE ELEVATION: The height, in relation to the NorthAmerican Vertical Datum (NAVD) of 1988, (or other datum, wherespecified) of floods of various magnitudes and frequencies in the floodplains of coastal or riverine areas.4. Data Required: All applications for approval of a Site Plan, Special Permit orBuilding Permit for residential and non-residential structures for propertieswithin the regulated area (Flood Zone A and AE) shall include the followingbase flood level data*:a. The elevation, in relation to mean sea level, of the lowest floor,including basement, for all new or substantially improved structures.b. Where a structure is floodproofed, the elevation, in relation to meansea level, to which it is floodproofed.c. When base flood elevation data or floodway data are not available,then the Town Planner shall obtain, review and reasonably utilize any baseflood elevation and floodway data available from a federal, State or othersource in order to administer the provisions of these Regulations.d. In Zones A and AE, when a regulatory floodway has not beendesignated, it must be demonstrated that the cumulative effect of theproposed development when combined with all other existing and anticipateddevelopment, will not increase the water surface elevation of the base floodmore than one foot at any point within the community.*172