Raleigh Stormwater Design Manual
A manual adopted by the City Council by reference, as fully as though set forth in this UDO that includes plan and data submission requirements, presents design procedures and criteria for conducting natural, hydrologic and hydraulic evaluations, stormwater control measure designs, standards for managing the volume and quality of stormwater runoff and standards for maintenance.
Rear Yard
The area located between the rear line of a building or structure and the rear boundary of a lot or an existing or proposed street right-of-way and extending along the entire width of the lot.
Receiving Watercourse
A lake, natural watercourse or other natural or man-made area into which stormwater runoff flows from a land-disturbing activity site.
Recyclable Material
Material including, but not limited to, metals (including vehicles which have been crushed off site), glass, rubber (including tires), plastic, paper and scrap, which is intended for reuse or reconstitution for the purpose of using the altered form. Recyclable material shall not include hazardous materials and wastes (as defined in 40 CFR 261.3 to 261.33 or as the same may be amended by law), garbage, biodegradable refuse such as food, medical wastes or other similar material and wrecked, dismantled or partially dismantled automobiles.
Refereed Journal
Publications reviewed by expert readers or referees prior to the publication of the material. After reading and evaluating the material, the referee informs the publisher if the document should be published or if any changes should be made prior to publication. Refereed materials are significant to the research and the literature of most academic fields because they assure readers that the information conveyed is reliable and timely.
Regional Stormwater Control Facilities
The overall design, construction and maintenance of measures and devices and associated drainage easement, conduits, inlets, channels, pipes, ditches, filters, buffers, bioretention areas and ponds that are necessary to collect, convey, store and control stormwater runoff and pollutants within or outside a development and for one or more developments, as shown on the stormwater control master plans approved by the State of North Carolina.
Regulatory Flood Protection Elevation
The elevation to which structures and uses within floodway fringe areas and future conditions flood hazard areas are required to be elevated or floodproofed. Within areas which have approved engineered flood studies, such as the FEMA flood insurance study and floodway fringe areas, this elevation will be the “without floodway” base flood elevation plus 2 additional vertical feet. Base flood elevations are shown in the flood insurance study for Wake County, Volumes 1 through 7. Within future conditions flood hazard areas, this elevation will be the future conditions flood elevation plus 2 additional vertical feet. Future conditions flood elevations are shown in the flood insurance study for Wake County, Volumes 1 through 7. For flood hazard soil areas and for areas without established flood elevations within watercourses which drain 1 square mile or more, this elevation is the topographic contour lying 5 vertical feet from the outermost boundaries of either the flood hazard soils or the made land, which traverse such soils. The regulatory flood protection elevation for flood hazard soil areas and for areas without established flood elevations within watercourses which drain less than 1 square mile is the elevation of the outermost boundaries of either the flood hazard soils or the made land which traverse such soils plus 2 additional vertical feet, or as determined from a flood hazard soil interpretation. The regulatory flood protection elevation shall be the base flood elevation established on the drainage basin study maps plus 2 additional vertical feet.
Replacement Cost
Either the median value based Square Foot Costs established by the most recent edition of Building Construction Cost Data published by R.S. Means or the most recent tax value for a building as reported in the County tax office. The property owner shall decide which of the 2 methods for determining replacement cost is to be used.
Residential District
The following general use and conditional zoning districts: Residential-1 (R-1), Residential-2 (R-2) Residential-4 (R-4), Residential-6 (R-6) and Residential-10 (R-10). Includes Manufactured Housing (MH).
Resource Management District
The following general use, conditional zoning and overlay zoning districts: Conservation Management (CM), Metro-Park Protection Overlay District (-MPOD), Special Highway Overlay District-1 (-SHOD-1) and Special Highway Overlay District-2 (-SHOD-2).
Reverse-frontage lot
A residential lot with more than one frontage, where access from the lot or adjacent lots is taken from a street with a lower classification on the Raleigh Street Plan Map, and rear yards are located adjacent to a street with a higher classification on the Raleigh Street Plan Map.
Ribbon Driveway
Also called “strip driveway,” a driveway that consists of two parallel strips of permanent non-erodible material (see Sec. 7.1.9) with groundcover or similar pervious material in between. One of the strips may be no more than 2’wide while the other may be up to 4’ wide to accommodate pedestrian access and a 3’ wide median shall be maintained in either scenario.
Riparian Surface Water
Actual surface water that is shown as a feature on either the most recent version of (a) the soil survey map prepared by the Natural Resources Conservation Services of the United States Department of Agriculture or (b) the most recent version of the 1:24,000 scale (7.5 minute) quadrangle topographic maps prepared by the United States Geologic Survey (USGS) except for the following surface waters:
1. Man-made channels, such as ditches and canals, other than a modified natural stream.
2. Man-made ponds and lakes that are located outside natural drainage ways.
3. Ephemeral (stormwater) streams.
Rooming Unit
Any room or group of rooms forming a single habitable unit used for living and sleeping, but not for cooking or eating purposes.