Summary

This is a comprehensive design and construction document set for the North Rim Roaring Springs Pumphouse (RSPH) renovation at Grand Canyon National Park, prepared by HDR Engineering, Inc. in Denver, Colorado as of May 2026. The documents consist of architectural, structural, mechanical, electrical, and process engineering drawings with detailed specifications for demolition, renovation, and new equipment installation at this remote Grand Canyon facility.

The project involves removing existing process equipment (turbines, desanders, chlorine equipment, HVAC systems, and electrical infrastructure) and installing new systems including high-pressure raw water pumps with auto-filters, a finished water booster pump system with bladder tank, dilute sodium hypochlorite dosing equipment, a 5,000-gallon finished water storage tank with immersion heater and recirculation capabilities, new electrical distribution and motor control center, updated HVAC equipment, and instrumentation and control systems. The structure requires selective concrete demolition and replacement, new metal roof installation to replace wood shingles, indoor partitioning with industrial curtains to separate pump and electrical areas, new floor slabs, equipment pads, and pipe support systems. The design accommodates a 14-person occupant load across three areas (Pump Room 101, Operations Room 102, and Electrical Area 103) with two emergency exits and meets 2024 International Building Code requirements for Group F-1 Moderate Hazard Industrial occupancy. All work is coordinated with existing building infrastructure while maintaining service to remote North Rim locations.