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Portsmouth, Virginia, Cade of Ordinances: PART II -CODE -Chapter 14.1 FLOOD PROTECTION Limit of Moderate Wave Action (LiMWA) means a boundary that identifies the landward location of the 1.5 ft wave height delineating a zone called the Coastal A Zone". Lowest floor means the lowest floor of the lowest enclosed area {including basement}. An unfinished orflood-resistant enclosure, usable solely for parking of vehicles, building access or storage in an area other than a basement area is not considered a building's lowest floor; provided that such enclosure is not built so as to render the structure in violation of the applicable non-elevation design requirements of Federal Code 44CFR Section 60.3. Manufactured home means, for purposes of this chapter, a structure, transportable in one or more sections, which is built an a permanent chassis and is designed for use with or without a permanent foundation when connected to the required utilities. For floodplain management purposes the term manufactured home also includes park trailers, travel trailers, and other similar vehicles placed on a site far greater than 180 consecutive days, but does not include a recreational vehicle. Manufactured home parWsubdivision means a parcel or contiguous parcels of land divided into two or more manufactured home lots for rent or sale. Market value means the city assessment value of the building as prepared by the city assessor. Mean sea level means, for purposes of the National Flood Insurance Program, the North American Vertical Datum (NAVD88} of 1988 or other datum, to which base flood elevations shown on the FIRM are referenced. New construction means, for the purposes of determining insurance rates, structures far which the start of construction commenced on or after December 31, 1974, and includes any subsequent improvements to such structures. For floodptain management purposes, new construction means structures for which the start of construction commenced on or after the effective date of a floodplain management ordinance adopted by the city, and includes any subsequent improvements to such structures. NFIP means the National Flood Insurance Program. Post-FIRM structure means a structure for which construction ar substantial improvement occurred after December 31, 1974. Pre-FIRM structure means a structure for which construction or substantial improvement occurred on or before December 31, 1974. Primary frontal dune means a continuous or nearly continuous mound or ridge of sand with relatively steep seaward and landward slopes immediately landward and adjacent to the beach and subject to erosion and overtopping from high tides and waves during major coastal storms. The inland limit of the primary frontal dune occurs at the paint where there is distinct change from a relatively steep slope to a relatively mild slope. 6