This series contains architectural drawings of City Hall, used by the Telephone Department to install and maintain telephone service. It contains the following files:
- File 1: City Hall electrical plans (1954 September)
- File 2: City Hall main floor telephone system revisions (1956 November 29)
- File 3: City Hall basement, 2nd floor, 3rd floor plans (1967)
- File 4: 2nd floor City Hall alterations to P.B.X. Room (1972); City Hall 3rd floor plan details, interior alterations (1975)