Definitions 17.4 Definitions Generally*
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includes but is not limited to, buildings, roads, pavement, gravel surfaces, etc. The effective impervious coverage for certain surfaces listed below are as follows:
in which sediment may be moved or carried in suspension, and which could be damaged by accumulation of sediment. LAND-DISTURBING ACTIVITY Any use of the land by any person in residential, industrial, educational, institutional, or commercial development, highway and road construction and maintenance, that results in a change in the natural cover or topography and that may cause or contribute to sedimentation. LANDSCAPE PLAN A plan illustrating the design and specifications for the preservation of existing vegetation; the placement of any live plant materials such as trees, shrubs, grasses, ground covers, etc.; and the location and design of built features such as berms, fencing, walls, etc. LARGER COMMON PLAN OF DEVELOPMENT OR SALE Any area where multiple separate and distinct construction or land disturbing activities will occur under one plan. A plan is any announcement or piece of documentation (including but not limited to a sign, public notice or hearing, sales pitch, advertisement, loan application, drawing, permit application, zoning request, or computer design) or physical demarcation (including but not limited to boundary signs, lot stakes, or surveyor markings) indicating that construction activities may occur on a specific plot. LEGISLATIVE DECISION The adoption, amendment, or repeal of a regulation or an application local act. It also includes the decision to approve, amend, or rescind a development agreement. LEGISTLATIVE HEARING A hearing to solicit public comment on a proposed legislative decision. LETTER OF MAP AMENDMENT (LOMA) A letter from FEMA that officially removes a property or building from the FEMA special flood hazard area (SFHA) that was inadvertently shown in the SFHA on the FIRM. LETTER OF MAP REVISION (LOMR) An official revision to the currently effective FEMA FIRM based on as-built conditions and/or more accurate data. It is issued by FEMA and may change FEMA base flood elevations, the location
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Asphalt, concrete, crusher-run, gravel, masonry, marl, wood, and other impermeable surfaces that prevent land area from infiltrating stormwater are 100% impervious. Porous surfaces that permit direct infiltration of unconcentrated stormwater into ground areas which are prepared in accordance with plans approved by the Town, so that the first one-half inch of stormwater infiltrates into the bare ground are 10% through 70% impervious, depending on: a. Compaction; b. Condition of subgrade; c. Extent of land disturbance; d. Extent of porous openings; e. Protection from siltation and clogging; f. Slope of the ground area; and g. Volume of stormwater stored. Slatted wood decks that allow the drainage of water through the slats to an unpaved surface below are 50% impervious. If the area covered by the deck is washed gravel, the deck is 30% impervious. Un-graveled natural footpaths, water surfaces of swimming pools and drainfields areas 0% impervious. All other necessary determinations about impervious surfaces will be based on hydrological tests based on existing subgrade soils, slope, rainfall intensity and rainfall duration.
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INTERMITTENT STREAM A well-defined channel that contains water for only a part of the year, typically during winter and spring when the aquatic bed is below the water table. The flow may be heavily supplemented by stormwater runoff. Intermittent streams often lack biological and physical characteristics commonly associated with the perennial conveyances of water. 15A NCAC 02B.0233 (2)(g). LAKE OR NATURAL WATERCOURSE Any stream, river, brook, swamp, sound, bay, creek, run, branch, canal, waterway, estuary, and any reservoir, lake, or pond, natural or impounded,
Town of Wake Forest Unified Development Ordinance – July 19, 2022
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