Concrete test cylinders cut from diamond drill cores through completed tunnel lining, Detroit water supply system

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Description

View of concrete test cylinders cut from diamond drill cores through completed tunnel lining, Detroit water supply system. Printed on front: "#33. Springwells tunnel contract section no. 4. Mark R. Hanna Co., contractor. View showng typical compression test failures of standard 6" x 12" concrete test cylinders cut from diamond drill cores taken through completed tunnel lining. Left to right: cylinder nos. 228-228A-229 top and bottom 231A-231. Oct. 22, 1928."

Details

Resource ID:: bh017097
Subject:: Drill core analysis; Detroit (Mich.). Department of Water Supply; Photographic prints
Date:: 1928-10-22
Format:: 1 photographic print ; 7.5 x 9.5 in.
Department:: Burton Historical Collection
Location:: MS/Detroit Archives. Water Board. Miscellaneous no. 2, 3 of 3, 11:3
Copyright:: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.