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Glossary and Acronyms <br />Chapter 7 <br />habitat -A place where a plant or animal naturally <br />or normally lives and grows. <br />hazardous waste -Those materials defined in <br />Section 101 (l4) of the Comprehensive <br />Environmental Response, Compensation and <br />Liability Act of 1980, and listed in 40 CFR § 261. <br />heritage resources - The remains of sites, <br />structures, or objects used by people in the past; this <br />can be historical or pre-historic. <br />hydrologeology - The science that deals with <br />subsurface waters and with related geologic aspects <br />of surface waters. <br />hydrologic balance -The relationship between the <br />quality and quantity of water inflow to, water <br />outflow from, and water storage in a hydrologic <br />unit (e.g., drainage basin, watershed aquifer, soil <br />profile, lake, or reservoir). The term encompasses <br />the dynamic relationships among precipitation, <br />runoff, and changes in groundwater and surface <br />water storage. <br />hydrology -The science dealing with the study of <br />water on the surface of the land, in the soil and <br />underlying rocks, and in the atmosphere. <br />interdisciplinary -Characterized by participation <br />or cooperation among two or more disciplines or <br />fields of study. <br />intermittent stream -A stream that does not flow <br />year-round but has some association with <br />groundwater for surface or subsurface flow. <br />invasive species - A species that can move into an <br />area and become dominant either numerically or in <br />terms of cover, resource use, or other ecological <br />impacts. An invasive species may be native or <br />nonnative. <br />irretrievable impact - A category of impact in the <br />National Environmental Policy Act to be analyzed <br />in environmental impact statements. Refers to <br />commitments that are lost for a period of time. For <br />example, while an area is used as a developed <br />recreation site, some or all of the timber production <br />there is irretrievably lost. If [he recreation area <br />closes, timber production could resume; the loss of <br />timber production during the time that the area was <br />devoted to developed recreation is irretrievable. <br />However, the loss of timber production during that <br />time is not irreversible, because it is possible for <br />timber production to resume if the area is no longer <br />used as a recreation area. Contrast with irreversible <br />impact. <br />irreversible impact - A category of impact in the <br />National Environmental Policy Act to be analyzed <br />in environmental impact statements. Refers to <br />commitments that cannot be reversed, except <br />perhaps in the extreme long term. For example, <br />once coal has been removed, it will not be replaced <br />within any measurable time period. Contrast with <br />irretrievable impact. <br />Land and Resource Management Plan (LRMP) - <br />The document that guides the management of a <br />particular national forest and establishes <br />management standards for all lands controlled by <br />that national forest. Also referred to as the forest <br />plan or simply the plan. <br />landslide - 1. A general term for a mass movement <br />landform. Types of landslides include creep, rock <br />slides and falls, earthflows, debris flows, and <br />avalanches. 2. A process characterized by <br />downslope movement or transport, by means of <br />gravitational stresses, of a mass of soil, rock and <br />other debris that may or may not be water saturated. <br />landtype - A unit of ecological land classification <br />based on similar bedrock geology, soils, and <br />landform, which repeats on the landscape. Mapped <br />a local or subregional scale in units of 100-10,000 <br />acres in size. <br />lease (mineral) -A legal document executed <br />between a mineral owner or lessor and another <br />party or lessee which grants the lessee the right to <br />extract minerals from the tract of land for which the <br />lease has been obtained [see 43 CFR 3400.0-5(r)]. <br />listed species -Refers to one or more species listed <br />by the US Fish and Wildlife Service as endangered <br />(E), threatened (T) or proposed for Federal listing <br />as threatened or endangered (P). Also referred to as <br />PET species, or a subset of the species defined as <br />PETS species. <br />lithology -the description of rocks on the basis of <br />such characteristics as color, structure, mineral <br />7-4 Dry Fork Lease-By-Application FEIS <br />