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Final Environmental Impact Statement

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Vestal <strong>Final</strong> <strong>Environmental</strong> <strong>Impact</strong> <strong>Statement</strong> Chapter 5<br />

Trail<br />

A general term denoting a way usually less than 50 inches wide for purposes of<br />

travel by foot, stock, or trail vehicle.<br />

Transportation System<br />

All roads needed to manage and administer Forest resources. A road network.<br />

Travel Corridor<br />

A strip of land that includes up to a maximum of 1,000 feet for major roads<br />

(500 feet either side of the road's centerline) or 500 feet for major trails (250 feet<br />

either side of the trail's centerline); travel corridors form a passageway that allows<br />

travelers to experience and interact with the quality and character of the<br />

landscape.<br />

Travel Management<br />

Travel management is the movement of people and products to and through<br />

national forests and grasslands. It connects many different varieties of users and<br />

multiple uses on National Forest System (NFS) lands.<br />

Understory<br />

The lowest layer of vegetation in a forest or shrub community composed of grass,<br />

forbs, shrubs, and trees less than 10 feet tall. Vegetation growing under the tree<br />

canopy.<br />

Values, Values at Risk (Fire Management)<br />

Any or all natural resources, improvements, or other values that may be<br />

jeopardized if a fire occurs.<br />

Water Influence Zone (WIZ)<br />

The land next to water bodies where vegetation plays a major role in sustaining<br />

long-term integrity of aquatic systems. It includes the geomorphic floodplain<br />

(valley bottom), riparian ecosystem, and inner gorge. Its minimum horizontal<br />

width (from top of each bank) is 100 feet or the mean height of mature dominant<br />

late-seral vegetation, whichever is most.<br />

Watershed<br />

The area of land bounded by a divide that drains water, sediment, and dissolved<br />

materials to a common outlet at some point along a stream channel or to a lake,<br />

reservoir, or other body of water. Also called a drainage basin or catchment.<br />

Watershed Conservation Practices (WCPs)<br />

Are stewardship actions based upon scientific principles and legal requirements to<br />

protect soil, aquatic and riparian resources. Each watershed conservation practice<br />

consists of a management measure, a set of design criteria used to achieve the<br />

management measure, and guidance for monitoring and restoration.<br />

Watershed Level<br />

The number assigned to an entire drainage basin contributing to the stream<br />

segment of a given level and bearing an identical designation; for example, a firstlevel<br />

watershed contains all the drainage area of a first-level stream (See “Stream<br />

Level.”)<br />

Waters of the United States<br />

209

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