VPRS 12858 General Correspondence Files, Overhead Design, Double Number System

This series consists of files relating to the design, maintenance and installation of overhead electrical wiring for permanent way train services, and the transmission of electric energy. From circa 1943 to 1983 this series was created by the Permanent Way Overhead Design Division of Victorian Railways (Electrical Engineering Branch). Administrative change throughout this period meant that the division was also known as the Overhead Superintendent's Office, Overhead and Electrolysis Design Division and Overhead Technical Division.From 1983 to 1989, following the abolition of Victorian Railways (VA 2876), the Overhead Design Division of the Metropolitan Transit Authority (MTA) inherited and continued to use this series. With the formation of the Public Transport Corporation (VA 2984) in 1989, the overhead design function was inherited by the Design Services Group of the Infrastructure Division.For the purposes of annual financial reporting the Electrical Engineering Branch was also known as Division 'G'. This identification system continued until 1964 when letter prefixes used for identifying Branches ceased.The series includes:- Overhead policy statements and policy files,- Meeting minutes, e.g., Site and construction meetings (in individual project files), Electrical Power Review committee, Stabling and Crew Coordination committee, Electrolysis committee,- Project files, estimates, specifications, photographs of works, and schedules including plans and circuit drawings for overhead lines,- Photographs, technical notes, reports and articles accumulated from overseas research trips,- Correspondence, and- Technical reports and manuals.