Environmental groups are trying to stop a lumber company from bulldozing a road across public land to access 558-acres of private forest. The groups recently appealed a U.S. Forest Service decision granting Stimson Lumber Co. permission to construct about 4,000 feet of road to access its timber holdings in the Kaniksu National Forest in the northeast corner of Washington. The area is important habitat for a variety of endangered and threatened species, including grizzly bears, said Mark Sprengel, executive director of the Selkirk Conservation Alliance, of Priest Lake.