Frost Lake, a small lake at the end of Frost Road north of Twisp River Road, will be closed this fall for construction to bring the dam into compliance with safety requirements.
Construction starts Sept. 18 and will continue into early November, according to the Washington Department of Fish and Wildlife (WDFW), which manages the lake and dam. WDFW refers to the lake as Milles Lake.
The construction work is expected to have only a moderate impact on public recreation in the area. People will not be able to use the crest of the dam to access the lake, but lake levels won’t be affected because repairs will take place above the ordinary high-water mark, WDFW said. Hiking trails in the area won’t be affected.
Work on the dam includes increasing the size of the spillway and adding features to mitigate impacts to wildlife, including bat boxes, wood duck nest boxes, and turtle-basking structures.
A gravel pullout that’s often used for parking will be used as a staging area for construction equipment, according to WDFW.