CONTENTS 



Page 



HIGHLIGHTS 3 



Area 3 



Inventory 4 



Components of Change ■ 4 



HOW THE INVENTORY WAS CONDUCTED 4 



DATA RELIABILITY 5 



TERMINOLOGY AND DATA TABLES 6 



TERMINOLOGY 6 



Land 6 



Water 6 



Land Use Classes 6 



Public Ownership Classes 6 



Private Ownership Classes 7 



Forest Type and Tree Species 7 



Area Condition Classes 7 



Productivity 8 



Stand-Size Classes 8 



Class of Timber 8 



Tree Size Classes 9 



Volume 9 



Components of Change 9 



FIGURES 



1. Western Montana Counties 2 



2. Percent of total land area in western Montana 



by ownership, 1977 3 



TABLES 



FOREST SURVEY TABLES 



1. Area of State and private forest land in western Montana 



with percent standard error, 1977 S 



2. Net volume, net annual growth, and annual mortality 

 of growing stock and sawtimber on State and private 

 commercial timberland in western Montana with percent 

 standard error 5 



3. Total land and water area in western Montana by 



ownership class, 1977 12 



4. Total land area in State and private ownership in 

 western Montana by major land class and ownership 



class, 1977 13 



5. Area of State and private commercial timberland in 

 western Montana by forest type, stand-size class, and 

 productivity class, 1977 14 



6. Area of State-owned conmiercial timberland in 

 western Montana by forest type, stand-size 



class, and productivity class, 1977 16 



