University of Michigan civil engineering students in tunnel, Waterworks Park, Detroit water supply system

View of civil engineering students from the University of Michigan posing in tunnel during construction, Waterworks Park, Detroit water supply system. Printed on front: "City of Detroit. Department of Water Supply. Land tunnel and structures. Contract RC 12. Dravo Contracting Co., contractors. Photo no. 114. Date: 5-15-31. Photo by Manning Brothers." Typed on back: "Inspection party of students from the civil engineering class at the University of Michigan. Picture taken at screen chamber end of 15 ft. 6 in. tunnel. The party was composed of the following: R.H. Sherlock, U. of M. prof.; P.B. Allen, [U of M.], student; P.R. Guthrin, [U of M.], [student]; G.S. Wilcox Jr., [U of M.], [student]; D.M. Hannah, [U of M.], [student]; A.D. Tucker, [U of M.], [student]; B.W. Johnson, [U of M.], Instructor; L.O. Whitsit, [U of M.], [student]; D.S. Carroun, [U of M.], [student]; M.C. Li, [U of M.], [student]; H.U. Woo, [U of M.], [student]; D.E. McCreacy, [U of M.], [student]; W.E. Warrnier, [U of M.], [student]; W.Y. Wony, [U of M.], [student]; H.R. Kallgren, Asst. Civil Engr. River Tunnels; E.A. Prokop, Designing Engr. River Tunnels; Torris Eide; Asst. Engr. River Tunnels."