Glossary

Description
Receptors [Noise]
Entities such as residential homes, apartments, parks, places of worship and churches, schools, commercial businesses and other facilities which can be affected by noise pollution from a proposed project. Noise receptors may potentially receive an increased, decreased or 'no-change' level of noise from ambient to future conditions based upon noise modeling. For widening projects, noise receptors are generally those existing entities and facilities along the right of way, which may or may not receive a potential noise increase. For new location projects, noise receptors are those entities generally located within several hundred feet from the proposed centerline of the new road.
Record of Decision (ROD)
The ROD is the final step in the EIS process and is the lead agency's (normally FHWA) decision that identifies the alternative selected for implementation. The ROD should: (1) state the basis for the decision, (2) identify all the alternatives considered and specify the "environmentally preferable alternative", and (3) state whether all practicable means to avoid or minimize environmental harm from the alternative selected have been adopted and, if not, why they were not. The ROD may not be issued sooner than 30 days after the approved final EIS is distributed, nor 90 days after the Draft EIS is circulated. http://www.fhwa.dot.gov/environment/doc_eis.htm
Regional Conditions [USACE]
There are regional conditions associated with each Nationwide Permit used in North Carolina by the Wilmington District. These regional conditions are established by the District and approved by the Corps Division, to ensure that the implementation of the nationwide permit program in waters and wetlands of North Carolina are consistent with meeting the program's goals of streamlining the permit process for those activities that have no more than minimal impacts to the environment.
Regional General Permit
Regional General Permits (GPs) are general permits (See Nationwide Permit) specific to the USACE-Wilmington District for waters and wetlands of North Carolina, and the associated conditions are established by the District.
Reinforced Concrete Box Culvert (RCBC)
[See box culvert] Most box culverts used by NCDOT are constructed with this type of material.
Relocations
Proposed projects may result in the displacement of residents and/or businesses; Relocation impacts are evaluated as part of the NEPA process. http://www.fhwa.dot.gov/legsregs/directives/techadvs/t664008a.htm
Reservoir Salvage Act of 1960
See Glossary of Environmental Laws
Resource Conservation and Recovery Act of 1976 (RCRA)
See Glossary of Environmental Laws
Restoration [mitigation]
1. The manipulation of the physical, chemical, or biological characteristics of a site with the goal of returning natural or historic functions to a former or degraded wetland. (USACE, Regulatory Guidance Letter 02-2, Guidance on Compensatory Mitigation Projects for Aquatic Resource Impacts Under the Corps Regulatory Program Pursuant to Section 404 of the Clean Water Act and Section 10 of the Rivers and Harbors Act of 1899, 24 December 2002);
  
  2. Re-establishment of wetland and/or other aquatic resource characteristics and function(s) at a site where they have ceased to exist, or exist in a substantially degraded state. (60 FR 228, pp. 58605-58614, "Federal Guidance for the Establishment, Use and Operation of Mitigation Banks," 28Nov95);
  
  3. Re-establishment of pre-existing habitat or condition. Differs from enhancement, which seeks to increase one or more values of an existing habitat. (USFWS, Draft Chapter on Mitigation Banking);
  
  4. The re-establishment of wetland hydrology and vegetation in an area where it previously existed. (15A NCAC 2H .0506 (h)(4)(A), (B), (C), (D));
  
  5. Return of an ecosystem to a close approximation of its condition prior to disturbance. (NRC, Committee of Characterization of Wetlands, 1995. Wetlands, Characteristics and Boundaries, National Academy Press, Washington, D.C., 308pp.
Retention Pond
Pond designed to hold a specific amount of water indefinitely, releasing the water at flow rates and frequencies similar to those that existed under natural conditions. Usually the pond is designed to have drainage leading to another location when the water level gets above the pond capacity, but still maintains a certain capacity.
Right of Way (ROW)
The area or property reserved for a specific transportation function such as a roadway or transit corridor. (DOT GL)
Right-to-Know (RTK)
A general term referring to governmental requirements concerning a citizen's or a community's 'right-to-know' about environmental and public health concerns, such as spills and releases of toxic chemicals.
Riparian Areas
Lands adjacent to waterbodies. Riparian areas are transitional between terrestrial and aquatic ecosystems, through which surface and subsurface hydrology connects waterbodies with their adjacent uplands. Riparian areas are adjacent to streams, lakes and estuarine-marine shorelines and provide a variety of ecological functions and services and help improve or maintain local water quality. Riparian areas are not synonymous with riverine areas.
Riparian Buffers
Vegetation along the banks of rivers and streams which filter nutrients and pollutants from runoff. Divided into two zones [see Zone1/Zone 2 below] and protected by the state's buffer rules.
Rivers and Harbors Appropriation Act of 1899 (Sections 9 & 10)
See Glossary of Environmental Laws
Roadside Environmental Unit
Unit of the NCDOT whose mission is "to provide roadside elements for a statewide highway system that is safe, environmentally sound, attractive, and responsive to the public's needs." Some of their responsibilities include the delegated Sediment and Erosion Control Program, Vegetation Management, NPDES stormwater management, program, hazardous materials management, environmental compliance issues, the Wildflower Program, Adopt-A-Highway, Rest Areas and Landscape Design. http://www.ncdot.org/doh/operations/dp_chief_eng/roadside/mission.html
Roadway Geometric Deficiencies
Shortcomings with various geometric elements, such as design speed, lane and shoulder widths, bridge widths, structural capacity, horizontal and vertical alignment, stopping sight distance, grades, cross-slopes, superelevation, and horizontal and vertical clearances. http://www.fhwa.dot.gov/legsregs/directives/techadvs/t504028.htm
Rural Planning Organization (RPO)
A regional planning body, established by NC General Statutes, Chapter 136, Article 17, Section 136-210-213, to provide assistance to rural areas in developing transportation plans and programs.
Was this page helpful?