B08__A13_Historic_Drawings_MC270.pdf

This document is a set of technical construction drawings and specifications for a radial gate and main canal structure operated by the U.S. Department of the Interior, Bureau of Reclamation, Colorado River Agency, Branch of Land Operations. The project involves a 16'-0" x 16'-0" radial gate with associated structural components for the main canal structure at Station 270+50, including details and elevation views. The drawings specify materials including structural steel, stainless steel rollers and pins, cast steel bearing blocks, and rubber seals. Key components detailed include the leaf (structural steel), arm (structural steel), roller bearing blocks with stainless steel rollers, roller pins, hoist brackets and seal assemblies, anchor blocks for gate pin bearing, and various tie plates and base plates. All components are designated with specific material grades and specifications, such as A.I.S.I. No. 416 stainless steel for rollers and pins.

The technical drawings include plan views, sectional elevations, detailed cross-sections (labeled A-A through F-F), and comprehensive dimensional annotations. Design notes specify construction requirements such as shop butt welds for gate components, rubber seal specifications, drainage provisions, and bolt specifications for assembly. The drawings indicate that all gates must be completely assembled in the shop for inspection and that existing temporary gates should remain operational during the contract period. The documents appear to be dated January 1968 based on markings visible on the sheets, with sheet numbers and area codes referenced for tracking purposes.