Items starting with R

Riparian Area

The area along a watercourse or around a lake or pond.

Riparian Ecosystem

The ecosystems around or next to water areas that support unique vegetation and animal communities as a result of the influence of water.

Risk from uncharacteristic wildfire effects

The risk that once a fire starts and gets large it will damage the ecosystem or human communities.


Resource Management Plan


Research and Natural Area


A motor vehicle travelway over 50 inches wide, except those designated and managed as a trail. A road may be classified, unclassified, or temporary.

Road analysis

An integrated ecological, social, and economic science-based approach to transportation planning that addresses existing and future road management options.

Road construction or reconstruction

Supervising, inspecting, actual building, and incurrence of all costs incidental to the construction or reconstruction of a road.

Road improvement

Activities that result in an increase of an existing road's traffic service level, expand its capacity, or change its original design function.

Road maintenance

The ongoing upkeep of a road necessary to retain or restore the road to the approved road management objective.

Road obliteration

A form of road decommissioning that re-contours and restores natural slopes.

Road realignment

Activities that result in a new location for an existing road or portions of an existing road, including treatment of the old roadway.

Road reconstruction

Activities that result in road realignment or road improvement,

Road-based recreation

Activities that are normally associated with classified roads and are consistent with the settings and experiences identified with Semi-Primitive Motorized (SPM), Roaded Natural (RN), Rural (R), and Urban (U) classes of the Recreation Opportunity Spectrum. Examples of these activities include car camping and picnicking, gathering berries and firewood, driving for pleasure, wildlife viewing, and OHV use.

Roaded Natural (RN)

A definition used in the Recreation Opportunity Spectrum (ROS) to characterize an area that has predominantly natural-appearing environments with moderate evidences of the sights and sounds of humans. Such evidences are usually in harmony with the natural environment. Interaction between users may be low to moderate, but evidence of other users is prevalent. Resource modification and practices are evident but harmonize with the natural environment. Conventional motorized use is provided for in construction standards and facilities design.

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