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<br />GLOSSARY
<br />
<br />AIR QUAUTY CLASSES. Classifications established under
<br />the Prevention of Significant Deterioration portion of the
<br />Clean Air Act, which limits the amount of air pollution
<br />considered significant within an area. Class I applies to areas
<br />where almost any change in air quality would be significant;
<br />Class II applies to areas where the deterioration normally
<br />accompanying moderate well-controlled growth would be
<br />considered insignificant; and Class III applies to areas where
<br />industrial deterioration would generally be considered
<br />insignificant.
<br />
<br />Al1..0TMENT. An area of land where one or more operators
<br />graze their livestock, It generally consists of public lands, but
<br />may include parcels of private lands. The number of
<br />livestock and period of use are stipulated for each allotment.
<br />
<br />ANIMAL UNIT MONTH. The amount of forage necessary to
<br />sustain one cow or its equivalent for a period of one month.
<br />
<br />BIG GAME. Larger species of wildlife that are hunted, such
<br />as elk, deer, bighorn sheep, and pronghorn antelope.
<br />
<br />CANDIDATE SPECIES. Any species not yet officially listed,
<br />but which are undergoing a status review or are proposed for
<br />listing according to Federal Reaister notices published by
<br />the Secretary of the Interior or the Secretary of Commerce.
<br />
<br />CRITICAL RANGE. The portion of land used by a population
<br />or herd of a wildlife species that is vital to the survival of that
<br />population or herd.
<br />
<br />CULTURAL RESOURCES. Those fragile and non-renewable
<br />remains of human activity, occupation, or endeavor reflected
<br />in districts, sites, structures, buildings. objects, artifacts, ruins,
<br />works of art, architecture, and natural features that were of
<br />importance in human events.
<br />
<br />ENDANGERED SPECIES. Any species, or significant
<br />population of the species, in danger of extinction throughout
<br />all or a significant portion of its ranges. Usually refers to
<br />those on lists of species recognized by Federal and State
<br />governments to be endangered.
<br />
<br />ENVIRONMENTAL IMPACT STATEMENT (EIS). A formal
<br />public document prepared to analyze the impacts on the
<br />environment of a proposed project or action and released
<br />for comment and review. An EIS must meet the
<br />requirements of NEPA, CEQ guidelines, and directives of the
<br />Agency responsible for the proposed project or action.
<br />
<br />EXISTING ROADS AND TRAILS. Roads and trails identified
<br />through a road inventory process.
<br />
<br />FEDERAL LAND POUCY AND MANAGEMENT ACT (FLPMA).
<br />The Federal Land Policy and Management Act of 1976
<br />(Public Law 94-579, 90 Stat. 2743, 43 USC 1701).
<br />
<br />GENERAL MANAGEMENT PlAN. A plan that sets forth the
<br />management concepts for park units; establishes a role for
<br />the units within the context of regional trends and plans for
<br />conservation, recreation, transportation, economic
<br />development, and other regional issues; and identifies
<br />strategies for resolving issues and achieving management
<br />objectives, usually within a period of 15 years. All other plans
<br />are consistent with the direction established in this lead
<br />
<br />planning document. No new development or major
<br />rehabilitation may be undertaken without an approved GMP.
<br />
<br />HABITAT. A specific set of physical conditions that surround
<br />a single species, a group of species, or a large community.
<br />In wildlife management, the major components of habitat are
<br />considered to be food, water, cover, and living space.
<br />
<br />HABITAT SITE. A mapped unit of land containing a distinct
<br />set of vegetation characteristics.
<br />
<br />LEASE. An instrument through which interests are transferred
<br />from one party to another, SUbject to certain obligations and
<br />considerations.
<br />
<br />LEASABlE MINERALS. Those minerals or materials
<br />designated as leasable under the Mineral Lecsing Act of
<br />1920. They include coal, phosphate, asphalt, sulphur,
<br />potassium and sodium minerals, and oil and gas.
<br />Geothermal resources are also leasable under the
<br />Geothermal Steam Act of 1970.
<br />
<br />LOCATABLE MINERALS. Minerals or materials subject to
<br />claim and development under the Mining Law of 1872, as
<br />amended. Generally includes metallic minerals such as gold
<br />and silver, and other materials not subject to lease or sale
<br />(some bentonites, limestones, talc, some zeolites, etc.).
<br />Whether or not a particular mineral deposit is locatable
<br />depends on such factors as quality, quantity, mineability,
<br />demand, and marketability.
<br />
<br />MINERAL ENTRY. Claiming public lands (administered by
<br />the BlM) under the Mining Law of 1872 for the purpose of
<br />exploiting minerals. May also refer to mineral exploration
<br />and development under the mineral leasing laws and the
<br />Material Sale Act of 1947.
<br />
<br />MINERAL MATERIALS. Common varieties of sand, building
<br />stone, gravel, clay, moss rock, etc., obtainable under the
<br />Minerals Act of 1947, as amended.
<br />
<br />MULTIPLE-USE. Management of the various surface and
<br />subsurface resources so that they are jointly utilized in the
<br />manner that will best meet the present and future needs of
<br />the public, without permanent impairment of the productivity
<br />of the land or the quality of the environment.
<br />
<br />OFF-ROAD VEHICLE (ORV). Any motorized vehicle capable
<br />of or designed for travel on or immediately over land, water,
<br />or other natural terrain. (Same as off-highway vehicle [OHV].)
<br />
<br />OFF-ROAD VEHICLE DESIGNATIONS.
<br />~N. Designated areas and trails where off-road
<br />vehicles may be operated (subject to operating regulations
<br />and vehicle standards set forth in BlM Manuals 8341 and
<br />8343).
<br />UMITED. Designated areas and trails where the use of
<br />off-road vehicles is subject to restrictions such as limiting the
<br />number or types of vehicles allowed, dates and times of use
<br />(seasonal restrictions), limiting use to existing roads and
<br />trails, or limiting use to designated roads and trails. Under
<br />the designated roads and trails designation, use would be
<br />allowed only on roads and trails that are signed for use.
<br />Combinations of restrictions are possible such as limiting
<br />use to certain types of vehicles during certain times of the
<br />year.
<br />CLOSED. Designated areas and trails where the use of
<br />off-road vehicles is permanently or temporarily prohibited.
<br />Vehicle use can be permitted for emergency purposes and
<br />special permitted uses.
<br />
<br />OUTSTANDING. 1. Standing out among others of its kind;
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