Recherche dans la collection - Welland Ship Canal. Power supply showing routes of H.C.P.T. and L. Co. and W.S.C. transmission lines and stations. Office of Engineer in charge, St. Catharines, Ont. Made by H. F. Marten. Recommended [by] Frank E. Sterns, Designing Engineer. Approved [by] Alex J. [illegible]. Maps & Profiles, no. 41. [cartographic material]