B08_Attach_02_North_Rim_Final_CDs_Volume_05_20261012_Part10.pdf

This is an engineering site plan and drawing for a federal construction project at North Rim, Grand Canyon National Park. The document shows a slope stabilization enlarged site plan prepared by HDR Engineering, Inc., a Denver, Colorado-based prime contractor, with the project manager identified as J. Glover/Gough. The drawing is dated June 2026 and carries drawing number C401, sheet 051, identified as sheet 20 of 113 in the overall project documentation.

The site plan illustrates erosion control and slope stabilization work featuring the installation of wire mesh secured with rock anchor assemblies to retain a steep slope area of approximately 1,033 square feet. The plan shows replacement of an existing timber wall with a modular block wall with a top elevation of 4,961.58 feet, along with a roading springs pumphouse structure. General notes specify that disturbed rock/riprap shall not exceed existing grade along the slope, and reference to Specification 32.32.16 is provided for modular block wall design and construction requirements. The keynotes indicate installation of the wire mesh system using rock anchor assemblies fastened to split plates and anchored to the proposed rock foundation arrangement.