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 15, 2013
Caption: How a Lift Lock Works -- 3
Additional Description: With water levels equal, the lock tender opens the downstream gates. The mules are hitched and the boat moves on.
Close-up of picture on marker
Submitted: May 15, 2013, by Allen C. Browne of Silver Spring, Maryland.
Database Locator Identification Number: p242163
File Size: 1.972 Megabytes

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