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19. WORM AND SPUR GEARS FOR CONTROLLING THE PADDLE VALVE IN ONE OF THE LOCK GATES WHICH SEPARATES UPPER AND LOWER CHAMBERS: 1976 - Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Middlesex County, MA
Content Provider | Library of Congress - Photographs |
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Spatial Coverage | Massachusetts -- Middlesex County -- Lowell |
File Format | JPG / JPEG |
Language | English |
Part of Series | Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey American Memory |
Requires | HTML5 supported browser |
Access Restriction | Open |
Content Type | Image |
Resource Type | Photograph |