§ 3372.902. Definitions.  


Latest version.
  • For the purposes of the Hellbranch Run watershed protection overlay only, the following phrases, terms, words, and their derivations have the meaning given herein.

    Letter A.

    "Agricultural land management practices" means those methods and procedures used in the cultivation of land in order to further crop and livestock production.

    "Association" means a legal entity operating under recorded land agreements or contracts through which each unit owner in the development is a member and each dwelling unit is subject to charges for a proportionate share of the expenses of the organization's activities such as maintaining common open space and other common areas and providing services needed for the development. An association can take the form of a homeowners' association, community association, condominium association or other similar entity.

    Letter B.

    "Best management practices" or BMPs mean management practices or structural practices designed to reduce the quantities of pollutants, such as sediment, nitrogen, phosphorus, and animal wastes washed by rain or snow melt into nearby receiving waters.

    Letter D.

    "Development" means any human-made change to improved or unimproved real estate, including but not limited to buildings or structures, mining, dredging, filling, grading, paving, excavating or drilling operations or storage of equipment or materials.

    "Director" means the Director of the Department of Development or the Director's designee.

    Letter E.

    "Environmentally sensitive development area" or proposed environmentally sensitive development area (ESDA) means the territory identified as such by the Columbus Metropolitan Facilities Plan Update (November 3, 2000) as filed with the Ohio Environmental Protection Agency.

    Letter F.

    "Floodplain" or "100-year flood plain" means a river or other watercourse and its adjacent area subject to inundation by the "base flood." The "floodplain" or "100-year flood plain" is also known as "special flood hazard area" and is composed of the "floodway" and "floodway fringe." Special flood hazard areas are designated by the Federal Emergency Management Agency as Zone A, AE, AH, AO, Al-30 or A99.

    "Floodway" means that portion of the "special flood hazard area," excluding the "floodway fringe," which is the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the "base flood" without cumulatively increasing the water surface elevation by more than one-half foot.

    "Floodway fringe" means that portion of the "special flood hazard area," excluding the "floodway," which is subject to inundation by the "base flood."

    Letter I.

    "Impervious cover" means any surface resulting from development that cannot effectively absorb or infiltrate rainfall and includes "impervious area" as defined by C.C.C. § 1 149.02.006.

    Letter N.

    "Natural channel design" means the process by which new or restored watercourse channels are designed to be naturally functional and self-sustaining, such that they emulate dynamically stable watercourses.

    Letter O.

    "Open space" means an area that is intended to provide light and air. Open space may include, but is not limited to, publicly or privately owned meadows, wooded areas, watercourses, wetlands, and flood plains. Open space does not include:

    (a)

    Private roads and public road rights-of-way;

    (b)

    Parking areas, accessways, and driveways;

    (c)

    Required setbacks between buildings, parking areas, and project boundaries;

    (d)

    Required setbacks between buildings and streets;

    (e)

    Required minimum spacing between buildings, and between buildings and parking areas;

    (f)

    Private yards;

    (g)

    Other small fragmented or isolated open areas that have a dimension less than 50 feet in any direction.

    Letter P.

    "Paving blocks" means cement or plastic grids with void spaces. Paving blocks make the surface more rigid and gravel or grass planted inside the holes allows for infiltration. Depending on the use and soil types, a gravel layer can be added underneath to prevent settling and allow further infiltration.

    "Permeable or semi-permeable material" means paving blocks or porous pavement.

    "Porous pavement" means permeable pavement surface with an underlying stone reservoir that temporarily stores surface runoff before infiltrating into the subsoil. This porous surface replaces traditional pavement, allowing parking lot runoff to infiltrate directly into the soil and receive water quality treatment. There are several pavement options, including porous asphalt, pervious concrete, and grass pavers. Porous asphalt and pervious concrete appear the same as traditional pavement from the surface, but are manufactured without "fine" materials, and incorporate void spaces to allow infiltration. Grass pavers are concrete interlocking blocks or synthetic fibrous grid systems with open areas designed to allow grass to grow within the void areas.

    Letter S.

    "Stream corridor protection zone" means the area of the floodplain that is necessary to maintain or allow redevelopment of a functional natural drainage system capable of flood storage during common flood events, separating fine sediments from discharge and assimilating pollutants, and recharging stream base flow and ground water. The width of the stream corridor protection zone (Z), as measured in feet, is based upon the size of the drainage area of the watercourse, but in no case may the stream corridor protection zone be less than the floodway. To determine Z, calculate the drainage area (DA) of the watercourse at the downstream end of the proposed development site.

    a.

    When DA is equal to or greater than 16 square miles, then Z = 87 DA 0.43 + 100′;

    b.

    When DA is less than 16 square miles, then Z = 117 DA 0.43; and

    c.

    When DA is equal to or less than 90 acres, then Z = 50′.

    In most instances, the stream corridor protection zone is located by placing the centerline of the zone over the centerline of the watercourse. However, individual site conditions, including but not limited to valley topography, must be reviewed to determine the precise location of the stream corridor protection zone.

    Letter U.

    "Upland" means land generally at a higher elevation than and extending inland from the watercourse.

    Letter W.

    "Watercourse" means any ephemeral, intermittent, perennial, natural or manmade creek, ditch (excepting any roadside ditch), river, or stream with a defined bed, bank or channel.

(Ord. 0854-2008 § 42.)