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Public road means a publicly owned road designed and constructed in accordance with water quality protection criteria at least as stringent as requirements applicable to the Virginia Department of Transportation, including regulations promulgated pursuant to Code of Virginia, § 62.1-44.15:24 et seq. (the Virginia Erosion and Stormwater Management Act). This definition includes those roads where the Virginia Department of Transportation exercises direct supervision over the design or construction activities, or both, and cases where secondary roads are constructed or maintained in accordance with the standards of the city. Redevelopment means the process of developing land that is or has been previously developed. Resource Management Area or RMA means that component of the Chesapeake Bay Preservation Area that is not classified as the Resource Protection Area. An RMA includes land types that, if improperly used or developed, have the potential for causing significant water quality degradation or for diminishing the functional value of the Resource Protection Area as provided for in subsection 9.14(b)(2). Resource Protection Area or RPA means that component of the Chesapeake Bay Preservation Area comprised of lands adjacent to water bodies with perennial flow that have an intrinsic water quality value due to the ecological and biological processes they perform or that are sensitive to impacts which may result in significant degradation to the quality of state waters as provided for in subsection 9.14(b)(1). State waters means all waters, on the surface or underground, wholly or partially within or bordering the commonwealth or within its jurisdictions, as defined in Code of Virginia, § 62.1- 44.3. Storm surge means the resulting temporary rise in sea level due to the action of wind stress on the water surface and low atmospheric pressure created during storms which can cause coastal flooding. Surge is the difference from expected tide level. Storm tide is the total water level. Substantial alteration means expansion or modification of a building or development that would result in a disturbance of land exceeding an area of 2,500 square feet in the RMA only. Tidal shore or shore means land contiguous to a tidal body of water between the mean low water level and the mean high water level. Tidal wetlands means vegetated and nonvegetated wetlands as defined in Code of Virginia, § 28.2-1300. Understory tree means a tree that typically reaches 12 to 35 feet in height when mature. Water body with perennial flow means a body of water that flows in a natural or manmade channel year-round during a year of normal precipitation. This includes, but is not limited to streams, estuaries, and tidal embayments and may include drainage ditches or channels constructed in wetlands or from former natural drainageways, which convey perennial flow. Lakes and ponds, into, out of, or through which a perennial stream flows. are a part of the perennial stream. Generally, the water table is located above the streambed for most of the year and groundwater is the primary source for stream flow. Water -dependent facility means a development of land that cannot exist outside of the RPA and must be located on the shoreline by reason of the intrinsic nature of its operation. These facilities include, but are not limited to: 4