B08__A14_Historic_Drawings_MC420.pdf

This document set comprises technical drawings and design specifications for a radial gate structure and associated canal station infrastructure operated by the Colorado River Agency, Branch of Land Operations. The drawings depict a main canal station (421+50) with detailed structural plans, sections, and equipment assemblies for a radial gate system designed to control water flow.

The specifications include structural details for the main canal gate measuring approximately 85 feet in width, with associated hoisting and control equipment. Key components detailed in the drawings include: the radial gate mechanism with pivot pedestals and pins, hoisting equipment assembly with motor-driven chain hoist systems, drum pedestals and shafts, geared flexible couplings, limit switches, and control house facilities. The design incorporates concrete foundations and steel structural elements throughout, with detailed specifications for wall brackets, seal assemblies, and roller bearing blocks. Additional infrastructure shown includes a float well location plan, electrical schematic for gate operation controls with selector switches and push-button controls, and various details for control panels and island lighting. The drawings reference multiple related specification documents (CRA-1054 through CRA-1059) and are dated in the 1950s, indicating this is a historical design for federal water control infrastructure along the Colorado River system.