The Project consists of re-grading forest Service Road 08S014 and installing a 26-foot by 36-inch corrugated metal pipe culvert, with apron at the inlet, to allow Alder Gulch passage under the roadway. A sand bag dike with a 6-inch PE by-pass pipe will divert water around the site while grading of the road occurs. The corrugated metal pipe culvert will be installed at or below the natural streambed at a slope to provide natural cleaning. Native soil will be used for fill material, and tunnel muck rock will be used to armor the surface of the road. A depression will be made on the new road surface to direct any excess flows to a path that will not erode the corrugated metal pipe culvert fill material.
The Project is minor in nature, does not involve removal of healthy, mature, scenic trees, and will have no significant environmental impacts, with implementation of measures contained in SAA# 2010-0093-R4.