B08__A13_Historic_Drawings_MC270.pdf

This document is a set of engineering 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 drawings detail the design and construction specifications for a 16'-6" x 16'-0" radial gate and associated main canal structures at Station 270+50, including elevation details and component assemblies.

The technical specifications encompass multiple structural steel components including a leaf with structural steel construction, a roller bearing block assembly made of cast steel, anchor blocks with detailed pin bearing configurations, and gate pin and pivot pedestal details. Key components specified include stainless steel rollers and roller pins (AISI No. 416), cast steel bearing blocks, anchor rods with detailed dam location specifications, tie plates, cover plates, and base plates. The drawings reference extensive dimensional requirements, welding specifications (including shop butt welds and field welds), and assembly instructions. Drawings are labeled with sheet numbers and revision dates (January 1958 noted on one sheet), and include standard notes regarding inspection requirements, assembly procedures in shop, and installation specifications for field conditions. The document represents detailed construction plans requiring fabrication of structural steel components and precise assembly according to the specified dimensions and welding standards.