Photograph as originally submitted to this page in the Historical Marker Database www.HMdb.org. Click on photo to resize in browser. Scroll down to see metadata.

Photographer: Allen C. Browne
Taken: May 3, 2017
Caption: How a Lock Works — Boat Heading Downstream
Additional Description: Lift locks raised and lowered boats to overcome changes in elevation.

A boat heading downstream enters the lock. Mules can be unhitched and the locktender closes the upstream gates.Close-up of image on marker
Submitted: May 5, 2017, by Allen C. Browne of Silver Spring, Maryland.
Database Locator Identification Number: p381768
File Size: 0.916 Megabytes

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