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File:Lock 20 Chesapeake and Ohio Canal drawing from HABS.png

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Description
English: Drawing of Lock 20 (Great Falls Tavern), showing butterfly valves and conduits to fill lock (1828 design style lock). HABS says: HABS MD,16-____,19B- (sheet 1 of 1) - Chesapeake & Ohio Canal, Lock No. 20, MacArthur Boulevard, Great Falls, Montgomery County, MD
Source

https://www.loc.gov/pictures/collection/hh/item/md0875.sheet.00001a/

This image is available from the United States Library of Congress's Prints and Photographs division
under the digital ID hhh.md57.
This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

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Author Historic American Buildings Survey
Permission
(Reusing this file)
This file comes from the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER) or Historic American Landscapes Survey (HALS). These are programs of the National Park Service established for the purpose of documenting historic places. Records consist of measured drawings, archival photographs, and written reports.


When reusing please credit: Library of Congress, Prints & Photographs Division, MD-57-E
This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
Camera location39° 00′ 07.99″ N, 77° 14′ 47″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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39°0'7.99"N, 77°14'47.00"W

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Date/TimeThumbnailDimensionsUserComment
current12:33, 2 June 2014Thumbnail for version as of 12:33, 2 June 20149,867 × 7,272 (276 KB)JeffyPI'm here to make the world a little bit smaller ☺
21:06, 8 January 2014Thumbnail for version as of 21:06, 8 January 20149,867 × 7,272 (460 KB)Bonnachoven{{Information |Description ={{en|1=Drawing of Lock 20 (Great Falls Tavern), showing butterfly valves and conduits to fill lock (pre 1928 style lock). HABS says: HABS MD,16-____,19B- (sheet 1 of 1) - Chesapeake & Ohio Canal, Lock No. 20, MacArthur B...

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