Close view of plywood roof of comfort station, Metcalf Bottoms, TennesseeGreat Smoky Mountains National ParkWork Order No. B-44 GRSM Roof framing, 3/4-inch exterior plywood used in lieu of 1x6 straight-edged boards. Completion report photo. Metcalf bottoms comfort stations, II-C-MB-7354, Physical Facilities - Campgrounds and Picnic Areas - Metcalf Bottoms