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Protected Activity Center (PAC) - Calitornia spotted owl protected ictivity centers arc 300 acre blocks of 

 habitat that are accepted as the most suitable habitat of what is available surrounding spotted owls found 

 outside of SOHAs in Sierra national forests. 



Regeneration harvest - Timber harvest conducted with the partial objective of opening a forest stand to the 

 point where favored tree species will be reestablished. 



Riparian area - A geographic area containing an aquatic ecosystem and adjacent upland areas that directly 

 affect it. 



Riparian Reserves - Designated riparian areas found outside the Late-Successionai Reserves. 



Spotted Owl Habitat Area (SOHA) - An area reserved from timber harvesting to provide forest habitat for 

 one pair of spotted owls. 



Watershed - The drainage basin contributing water, organic matter, dissolved nutrients, and sediments to a 

 stream or lake. 



Wild and Scenic River System - Those rivers or sections of rivers designated as such by Congressional 

 action under the Wild and Scenic River Act (Public Law 90-542). Each designated river may be classified 

 and administered under one or more of the following categories: 



1. Wild River Areas - Those rivers or sections of rivers that are free of impoundments and generally 

 inaccessible except by trail, with watersheds or shorelines essentially primitive and waters unpolluted. 

 These represent vestiges of primitive America. 



2. Scenic River Areas - Those rivers or sections of rivers that are free of impoundments with watersheds 

 still largely primitive and shorelines largely undeveloped, but accessible in places by roads. 



Wilderness - Areas designated by Congressional action under the 1964 Wilderness Act. Wilderness is 

 defined as undeveloped federal land retaining its primeval character and influence without permanent 

 improvements or human habitation. Wilderness areas are protected and managed to preserve their natural 

 conditions, which generally appear to have been affected primarily by the forces of nature, with the imprint 

 of human activity substantially unnoticeable. 



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