Gate mechanism at Sault Ste. Marie locks [graphic].
Detroit Publishing Co., publisher.
still image
Dry plate negatives. gmgpc
[between 1900 and 1906]
eng
Detroit Publishing Co. no. 011316.
State Historical Society of Colorado;
Locks (Hydraulic engineering)
United States Sault Sainte Marie.
United States Sault Sainte Marie Canal.
Detroit Publishing Company photograph collection (Library of Congress)
http://hdl.loc.gov/loc.pnp/det.4a07090
No known restrictions on publication.