B08_Attach_02_North_Rim_Final_CDs_Volume_05_20261012_Part2.pdf

This is a Demolition Plan for the North Rim of Grand Canyon National Park, prepared by HDR Engineering, Inc., located in Denver, Colorado. The plan is dated May 2026 and covers demolition and site remediation activities at the North Rim facility.

The plan identifies multiple demolition and removal tasks including: removal and disposal of drain and fill piping and drainage structures; removal of concrete slabs and surface gravel with exposed portions of timber crib wall subject to inspection; relocation of rock/rip-rap that has settled beyond the toe of slope behind the riprap distribution point within slope stabilization limits; removal and storage of decking surface material prior to concrete slab removal; removal of 34 linear feet of 8-inch aluminum waterline to north rim; removal of 84 linear feet of 4-inch steel floor drain; removal of 3 linear feet of 6-inch steel cap and abandonment; removal of concrete decking to a depth of 6 inches; removal of timber wall; removal of 3 trees; removal of settling tubes and abandonment; relocation of equipment prior to removal of concrete slab; removal of T-67; and removal of crib wall yard piping. The plan includes detailed site photographs, cross-sectional details of concrete slabs, settling tubes, rock/rip-rap conditions, and crib wall and timber wall configurations. General notes specify that materials removed shall be disposed of at the contractor's expense and that the contractor will coordinate equipment relocation with the Colorado Outfit (CO).