National Register of Historic

(National Register)

Places Established by the Historic Preservation Act of 1966. A listing maintained by the National Park Service of architectural, historical, archeological, and cultural sites of local, state, or national significance. Sites are nominated to the Register by the states and by Federal agencies.

Copies

of the National Register are available from the Superintendent of Documents, USGPO, Washington, D.C. 20402.

Non-commercial Forest Land Land which is not capable of yielding at least 20 cubic feet of wood per acre per year from per year from commercial species, or land

which is capable of producing only non-commercial tree species.

Non-degradation Policy

Use of the highest and best practicable treatment and/or control of wastes, activities, and flows to maintain water quality at the highest possible levels.

Non-forest

Land

Land that has been developed for non-timber uses or land that is incapable of being 10 percent stocked with forest trees.

Non-point Source Pollution

-

Pollution caused by the introduction of materials from diffuse sources (e.g., sediment, nutrients), or from a natural or manmade alteration in the stream system.

O&C Lands

Public lands granted to the Oregon and California Railroad Company and subsequently revested to the United States.

Octave Band Sound Pressure Level The sound pressure level of that portion of the total sound which lies between a band of frequency whose highest component is double that of the lowest frequency component, for example, 707 and 1414 Hertz.

Old-Growth Dependent - An animal species so adapted that it can exist only in old-growth forests.

Operations Inventory An intensive forest inventory which provides managers with information showing the location, acreage, silvicultural needs, and mortality-salvage or thinning needs within each section of public land.

Paleontology - A science dealing with the life of past geological periods as known from fossil remains.

Partial Cutting Tree removal other than by clearcutting.

Particulates - Finely divided solid or liquid particles in the air or in an emission; includes dust, smoke fumes, mist, spray, and fog.

The highest amount of flow occurring in a year or for a single

storm event.

Permeability (soil)

The quality of a soil horizon that enables water or air to move through it; may be limited by the presence of one nearly impermeable horizon even though the others are permeable.

Personal Income the income received by all individuals in the economy from all sources; made up of wage and salary disbursements, proprietors income, rental income of persons, dividends, personal interest income, and the difference between transfer payments and personal contributions for social insurance.

Phytoplankton plants.

Plankton

Suspended, floating, or weakly swimming microscopic aquatic

Organisms of relatively small size, mostly microcscopic, that either have relatively small powers of locomotion or drift in the water subject to the action of waves and currents.

Plant Community

An association of plants of various species found growing together in different areas with similar site characteristics.

Precommercial Thinning - Removal of surplus trees in a stand prior to their reaching merchantable size.

Public Lands Any land and interest in land owned by the United States within the several States and administered by the Secretary of the Interior through the Bureau of Land Management. May include public domain, O&C, or acquired lands in any combination.

Public Domain Lands

Original holdings of the United States never granted or conveyed to other jurisdictions.

Recharge

Process by which water is added to the zone of saturation, as in recharge of an aquifer.

The renewal of a tree crop, whether by natural or artificial means; also, the young crop itself.

Regeneration Cut - One of the phases of shelterwood cutting designed to open the canopy of a stand sufficiently to allow the establishment of regeneration, i.e, either the first stage of a two-stage shelterwood cutting or the second stage of a three-stage shelterwood cutting.

Regeneration Period The time it takes for a new coniferous timber stand to become established following the final harvest cut.

Relict

A remnant or fragment of a flora that remains from a former period when it was more widely distributed.

Pertaining to natural communities which develop on banks of a body of water.

or near the

Runoff - That part of precipitation, as well as any other flow contributions, which appears in surface streams, either perennial or intermittent.

Sanitation/Salvage Cutting

Removal of individual trees killed or injured by fire, insects, disease, etc., and the removal of those trees likely to die prior to final harvest cut so as to utilize merchantable material.

Savanna

A grassy expanse with scattered clumps of trees.

Sawlog

A log considered suitable in size and quality for producing sawn timber.

Scarification

Disturbance of the upper soil layer by mechanical means in

preparing a site for seeding or planting.

The quality of the scenery as determined through the use of the scenic evaluation process.

Scribner Decimal C Log Rule - A derivation of the Scribner Log Rule whereby volumes are rounded to the nearest ten board feet and are listed in tens of board feet. Volumes given in table of this rule must be multiplied by 10 to obtain the actual board foot content.

Scribner Log Rule - A log rule constructed from diagrams which shows the number of 1-inch boards which can be drawn in a circle representing the small end of a log; assumes a 1/4-inch saw kerf, makes a liberal allowance for slabs, and disregards taper.

Sediment Yield The quantity of sediment, measured in dry weight or by volume, transported through a stream cross-section in a given time. Consists of both suspended sediment and bedload.

Sedimentary Rock - A rock formed from materials deposited from suspension or precipitated from solution and usually more or less consolidated; e.g. sandstone, shale, limestone, and conglomerates.

An index of the relative importance or volume of visual

resonse to an

in relation to other areas in the planning unit.

Shelterwood Cutting - A series of partial cuttings designed to establish a new crop of trees under the protection of the old.

Silviculture - The art of producing and tending a forest.

Siphon A pipe which uses atmospheric pressure to transfer water from one point to another against gravity.

Site Class A measure of the relative productive capacity of an area for timber or other vegetation.

Slash

The branches, bark, tops, cull logs, and broken or uprooted trees left on the ground after loogging has been completed.

Snag - A standing dead tree from which the leaves and most of the branches have fallen.

Soil

The unconsolidated mineral and organic material on the immeditate surface of the earth that serves as a natural medium for the growth of land plants.

Soil Mapping Unit - A kind of soil, a combination of kinds of soils, or miscellaneous land type or types that can be shown at the scale of mapping for the defined purposes of the survey; the basis for the delineations of a soil survey map.

Standard Industrial Classification (SIC) - An industrial classification system as defined by the Office of Management and Budget; defines industries in accordance with the composition and structure of the economy and covers the entire field of economic activity. Refer to lumber and wood products for an explanation of SIC 24.

State Historic Preservation Office (SHPO)

Position established to review ESs within every state, maintain a register of historic sites (including archeological) for the State, and advise state land management agencies on archeological matters.

Subsurface Flow

Movement of water through the soil profile, often laterally. Succession - The orderly process of community change. Process by which one plant community will succeed another over time given the same climatic conditions.

Suspended Sediment - Sediment suspended in a fluid by the upward components of turbulent currents or by colloidal suspension.

Sustained Yield

The yield that a forest can produce continuously at a given intensity of management.

Texture (soil)

The relative proportion of sand, silt, and clay (expressed as percentages) in a soil; grouped into standard classes and subclasses in the USDA Soil Survey Manual.

Timber Activity Plan - A plan which deals specifically with the implementation of the approved allowable cut.

Timber Production Base

Acres included in the calculation of the allowable cut (see high intensity forest management lands).

Timber Production Capability Classification (TPCC) - A classification system that identifies the commercial forest and base capable of producing timber on a sustained yield basis.

True Fir A member of the genus Abies, for example white fir (Abies concolor). Douglas-fir (Pseudotsuga menziesii) is not a true fir.

nderstory Species

Shade-tolerant plant species which characteristically grow beneath the forest canopy; e.g., blackberry and rhododenron.

Unit Resource Analysis (URA) - A BLM planning document which contains a comprehensive inventory and analysis of the physical resources and an analysis of their potential for development, within a specified geographic

area.

Visual Contrast

The effect of a striking difference in the form, line, color, or texture of an area being viewed.

Visual Resource

The land, water, vegetation, animals, and other features that are visible on all public lands.

Visual Resource Management (VRM)

Management of the visual landscape.

Visual Resource Management Classes - The degree of alteration that is acceptable within the characteristic landscape. Based upon the physical and sociological characteristics of any given homogeneous area.

Visual Zones The area that can be seen from a location and classified as foreground, middleground, background, or seldom seen.

Water Quality

To evaporate; to change from a liquid to a gas.

The combined physical, chemical, and biological characteristics of water bodies.

Xeric

The uprooting of a live tree by wind.

A soil moisture regime resulting from a climate having moist cool winters and warm dry summers. Moisture is present in limited amounts but not at the optimum period for plant growth.

Yarding - The initial haul to a loading point, i.e., transporting timber from the stump to a landing.