Specifications include, but are not limited to: Pre-Commerical Thinning 144 acres. Project Location. The project is located in Section 36 T28N R27.5W; approximately 50 miles west of Kalispell, MT on Hwy 2.This is a pre-commercial thinning project. Thinned trees must be cut by hand with a chainsaw or hand brush/tree cutter. Acreage to be thinned is 144.Pre-commercial thinning will be done to thin trees that are 5 inches or smaller to promote health and vigor of residual trees. 5 inches shall be measured at D.B.H. (diameter at breast height, measured at 4 ½ feet above the ground).Trees of all species 5 inches D.B.H. or less will be thinned on a 16-foot by 16-foot stem spacing. Preferred leave tree species will be listed in order as follows: Ponderosa pine, western larch, Douglas-fir, Engelmann spruce. See Attachment E for more detailed specifications.