The Municipal Street Railway System was formed in 1919 when the City purchased the rail lines of the Puget Sound Traction, Light and Power Company. The System was administered by the Department of Public Utilities until 1932 when the Department was abolished. The System was then under the authority of the Board of Public Works. By 1938, the System was archaic and bankrupt. It received a loan from the Reconstruction Finance Corporation in 1939 and began a modernization program. The System was reorganized in 1939, changed its name to the Seattle Transit System, and came under the policy direction of the Seattle Transportation Commission from 1939-1951 and then the Seattle Transit Commission until 1971. The newly formed Department of Transportation operated the System until 1973 when it became part of Municipality of Metropolitan Seattle (Metro). These records are part of the Metro records located at the Washington State Archives, Puget Sound Branch. Annual reports (1919-1936) of the Municipal Street Railway System are located at the Seattle Municipal Archives (see Record Series 1802-H4).