A separate library for first and second-year undergraduate students was established in 1960 when the College Library was established in the new south wing of Main Library. In 1964 it was renamed the Sedgewick Library after former professor and head of the Department of English Garnet G. Sedgewick. The growth of both its collections and the University's undergraduate population made it necessary for Sedgewick Library to move to new facilities, and in 1969 Rhone & Iredale Architects were commissioned to design a new undergraduate library. The new Sedgewick Library was opened in January 1973 – it was located underground, beneath Main Mall and directly across from Main Library. The building received several awards: 1970 Best Design Award, Canadian Architecture Yearbook; 1974 First Award of the Royal Architectural Institute of Canada as the best building of all kinds built-in 1973; 1980 Honour Award, Architectural Institute of British Columbia. The continuing growth of the Library's collections eventually forced the ideal of a separate undergraduate facility to be abandoned, and in 1996 Sedgewick Library was absorbed into a new central facility, the Walter C. Koerner Library.
The sous-fonds consists primarily of records generated in planning and building the underground Sedgewick Library and includes reports, correspondence, drawings, minutes, printed materials, and photographs of the building nearing completion. These make up the Planning, Design and Construction series. There is also a series called Reports, which consists of reports on overdue books and related issues, and an Architectural Plans series.
Architectural drawings were transferred to the University Archives in 1988. They include original manuscript drawings, construction plans from the various contractors, proposals for alterations, and contractors' plans for alterations.