SNFPA Final Supplemental Environmental Impact Statement

January 2004

Appendix B: Glossary

This glossary replaces both the Glossary in the FEIS and the January 2001 SNFPA ROD in their entirety.

canopy cover: Also referred to as canopy closure. The ground area covered by tree crowns. Canopy cover is expressed as a percent of the area. Values for percent canopy cover can be derived in many ways.

ground disturbing activities: Activities that result in detrimental soil compaction or loss of organic matter beyond the thresholds identified by soil quality standards.

hand treatments: Hand treatments can include the use of chainsaws or other hand operated mechanical tools.

limited operating period: A specified period of time during which identified activities are restricted or prohibited.

mechanical treatments: Examples of mechanical treatments include: pre-commercial thinning, biomass thinning, commercial thinning, salvage harvesting, group selection, piling, crushing, and mastication.

prescribed burning treatments: Includes all of the steps necessary to prepare and implement a prescribed burn. Examples include line construction, ignition, and mop-up of prescribed burns.

vegetation treatments: Includes both mechanical treatments and prescribed burning treatments.