Final Environmental Impact Statement

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Vestal Final Environmental Impact Statement Chapter 5 208 • Structural Stage 1 (Grass/Forb): An early forest successional stage during which grasses and forbs are the dominant vegetation. This stage is dominated by grasses and forbs lasting until tree seedlings become established. • Structural Stage 2 (Shrubs/Seedlings): Developmental stage dominated by tree seedlings (less than one inch dbh) and shrub species. This stage consists of shrubs and seedlings. This stage remains until seedlings reach 1 inch diameter at breast height (dbh). • Structural Stage 3 (Sapling/Pole): Developmental stage dominated by young trees 1 to 9 inches dbh, 10 to 50 feet tall, and usually less than 50 years old. This stage is subdivided into three canopy closure classes: SS3A Sapling/Pole stage with less than 40% canopy cover o SS3B Sapling/Pole stage with 40-70% canopy cover o SS3C Sapling/Pole stage greater than 70% canopy cover • Structural Stage 4 (Mature): Consists of trees larger and older than structural stage 3. This stage contains trees which are at least 9” dbh. o SS4A Mature stage with less than 40% canopy cover o SS4B Mature stage with 40-70% canopy cover o SS4C Mature stage greater than 70% canopy cover • Structural Stage 5 (Late Succession): This stage is characterized by very large trees (16+ inches dbh). Trees are at least 160 years in age. Late succession ponderosa pine may occur in dense stands but may also grow in the open or in “park-like” stands. Successional Stages (Seral Stages) The relatively transitory communities that replace one another during development toward a potential natural community. Temporary Roads A road developed and operated for a limited period of time that will cease to exist as a transportation facility after the purpose for which it was constructed is completed and the occupied land is reclaimed and managed for natural resource purposes. Thinning The practice of removing some of the trees in a stand to meet desired conditions. Two types of thinning may be done: Pre-commercial, Non-commercial: Removing trees that are too small to make a merchantable product. Commercial: Removing trees that have reached sufficient size to be manufactured into a product and to improve tree spacing and promote more rapid growth. Threatened Species Any species likely to become endangered within the foreseeable future throughout all or a significant portion of its range and that has been designated in the Federal Register by the Secretary of Interior as such.
Vestal Final Environmental Impact Statement Chapter 5 Trail A general term denoting a way usually less than 50 inches wide for purposes of travel by foot, stock, or trail vehicle. Transportation System All roads needed to manage and administer Forest resources. A road network. Travel Corridor A strip of land that includes up to a maximum of 1,000 feet for major roads (500 feet either side of the road's centerline) or 500 feet for major trails (250 feet either side of the trail's centerline); travel corridors form a passageway that allows travelers to experience and interact with the quality and character of the landscape. Travel Management Travel management is the movement of people and products to and through national forests and grasslands. It connects many different varieties of users and multiple uses on National Forest System (NFS) lands. Understory The lowest layer of vegetation in a forest or shrub community composed of grass, forbs, shrubs, and trees less than 10 feet tall. Vegetation growing under the tree canopy. Values, Values at Risk (Fire Management) Any or all natural resources, improvements, or other values that may be jeopardized if a fire occurs. Water Influence Zone (WIZ) The land next to water bodies where vegetation plays a major role in sustaining long-term integrity of aquatic systems. It includes the geomorphic floodplain (valley bottom), riparian ecosystem, and inner gorge. Its minimum horizontal width (from top of each bank) is 100 feet or the mean height of mature dominant late-seral vegetation, whichever is most. Watershed The area of land bounded by a divide that drains water, sediment, and dissolved materials to a common outlet at some point along a stream channel or to a lake, reservoir, or other body of water. Also called a drainage basin or catchment. Watershed Conservation Practices (WCPs) Are stewardship actions based upon scientific principles and legal requirements to protect soil, aquatic and riparian resources. Each watershed conservation practice consists of a management measure, a set of design criteria used to achieve the management measure, and guidance for monitoring and restoration. Watershed Level The number assigned to an entire drainage basin contributing to the stream segment of a given level and bearing an identical designation; for example, a firstlevel watershed contains all the drainage area of a first-level stream (See “Stream Level.”) Waters of the United States 209
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Final Environmental Impact Statement

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