Inventory Summary for Region 1 Montana National Forests
     
Interior West Resource Inventory, Monitoring, and Evaluation (IWFIA) Program
USDA Forest Service, Rocky Mountain Research Station, Ogden, Utah
This reference is based on Region 1 Montana National Forest inventories conducted from 1993 to 1998.
             
  Number of Field Locations  
Nonforest
  National Forest Survey Date* Forest Land** Land & Water Other*** Total
           
  B-D* total: 1997 442 101 4 547
  - Beaverhead   (266) (87) (1) (354)
  - Deerlodge   (176) (14) (3) (193)
           
  Bitterroot 1995 226 20 6 252
           
  Custer 1997 105 87 3 195
           
  Flathead 1994 338 37 2 377
           
  Gallatin 1998 223 52 8 283
           
  Helena 1996 139 11 0 150
           
  Kootenai 1994 352 11 3 366
           
  Lewis & Clark 1996 267 30 2 299
           
  Lolo 1996 327 17 3 347
*  Some forests were inventoried over a 2 to 3 year period; the survey date listed has been selected as the
 representative inventory year. Since the time of the field inventory, the Beaverhead and Deerlodge forests have
   merged to form the B-D National Forest.
**  Field location (also referred to as sample site or plot) on forest land: A timberland field location usually consisted
 of 5 to 7 sample points distributed on the sample acre; at each sample point a variable-radius main plot, 40 Basal
 Area Factor tally, and a 1/300-acre seedling/sapling subplot were established. A woodland field location consisted
 of one fixed-radius main plot (1/10- or 1/20-acre) divided into 4 quadrants, located on the sample acre; within each
 quadrant, a 1/300-acre seedling/sapling subplot was established. Only 2 woodland field locations were sampled
 on Montana National Forests; these plots were located on the Beaverhead NF, now part of the B-D.
***  "Other" includes sample sites classified as inaccessible or sample missed.