Chicago : Engineering and Contracting Pub. Co. · leaf 333
20x60 ft., covering both tunnels.When the contractor came on the work, inthe fall of 1906, the shaft was turned over tohim to be used as a base of operations andto be maintained and completed in accordancewith the contract drawings. The first tempo-rary shaft, known on the work as Shaft No.2, was…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
