Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Starved Rock Locks & Dam, Illinois Waterway River mile 231, Peru, La S...
Significance: Starved Rock Lock and Dam consists of a 1,310' straight-crested, reinforced-concrete gravity dam and a 110' x 600' Ohio River Standard lock with horizontally framed miter gates. A 518' headgate s... More
Starved Rock Locks & Dam, Illinois Waterway River mile 231, Peru, La S...
Significance: Starved Rock Lock and Dam consists of a 1,310' straight-crested, reinforced-concrete gravity dam and a 110' x 600' Ohio River Standard lock with horizontally framed miter gates. A 518' headgate s... More
Starved Rock Locks & Dam, Illinois Waterway River mile 231, Peru, La S...
Significance: Starved Rock Lock and Dam consists of a 1,310' straight-crested, reinforced-concrete gravity dam and a 110' x 600' Ohio River Standard lock with horizontally framed miter gates. A 518' headgate s... More
Starved Rock Locks & Dam, Illinois Waterway River mile 231, Peru, La S...
Significance: Starved Rock Lock and Dam consists of a 1,310' straight-crested, reinforced-concrete gravity dam and a 110' x 600' Ohio River Standard lock with horizontally framed miter gates. A 518' headgate s... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Union Canal Locks, Bernville, Berks County, PA
Significance: The ruins of these locks document 19th-century canal technology, and illustrate the importance of water transportation in the first half of the century. Although the Union Canal failed to become ... More
Union Canal Locks, Bernville, Berks County, PA
Significance: The ruins of these locks document 19th-century canal technology, and illustrate the importance of water transportation in the first half of the century. Although the Union Canal failed to become ... More
James River & Kanawha Canal, Locks 1-5, Tenth to Thirteenth Streets, n...
Significance: From the late eighteenth century until the 1880s, an important and far-flung canal system gradually emerged on the Richmond scene. Envisioned by George Washington and others, the canal system eve... More
James River & Kanawha Canal, Locks 1-5, Tenth to Thirteenth Streets, n...
Significance: From the late eighteenth century until the 1880s, an important and far-flung canal system gradually emerged on the Richmond scene. Envisioned by George Washington and others, the canal system eve... More
Sault Ste. Marie International Railroad Bridge, Spanning Soo Locks at ...
Significance: The Sault Ste. Marie International Railroad Bridge has nine camelback truss spans crossing the St. Marys River with bascule and vertical lift bridge components crossing the American Locks at the S... More
Sault Ste. Marie International Railroad Bridge, Spanning Soo Locks at ...
Significance: The Sault Ste. Marie International Railroad Bridge has nine camelback truss spans crossing the St. Marys River with bascule and vertical lift bridge components crossing the American Locks at the S... More
Sault Ste. Marie International Railroad Bridge, Spanning Soo Locks at ...
Significance: The Sault Ste. Marie International Railroad Bridge has nine camelback truss spans crossing the St. Marys River with bascule and vertical lift bridge components crossing the American Locks at the S... More
Sault Ste. Marie International Railroad Bridge, Spanning Soo Locks at ...
Significance: The Sault Ste. Marie International Railroad Bridge has nine camelback truss spans crossing the St. Marys River with bascule and vertical lift bridge components crossing the American Locks at the S... More
Miami & Erie Canal Locks, Loramie Portage site vicinity, Lockington, S...
Significance: The locks are the highest point on the Miami and Erie Canal, commenced in 1825 from Cincinnati to Dayton and completed in 1845 to Toledo. Survey number: HABS OH-411 Building/structure dates: ca.... More
Picryl description: Public domain image of a ship hull, port, harbor, ...
Public domain image of a historic view of Boston Harbor, Massachusetts, free to use, no copyright restrictions - Picryl description
The locks at Little Falls - Public domain image. Dry plate negative.
Public domain photograph - city, downtown, New York, United States, free to use, no copyright restrictions image - Picryl description
Canal locks, Louisville, Ky. - Public domain image. Dry plate negative...
Picryl description: Public domain image of a canal, barge, historic place, water reflection, 19th century, free to use, no copyright restrictions.
Pedro Miguel Locks, gelatin silver print
J188508 U.S. Copyright Office Copyright claimant's address: 143 Baronne St., New Orleans, La. No. 548. Copyright deposit; Gordon Panoramic Photo Co.; December 29, 1913.
Miraflores Locks showing control house nearing completion and lock gat...
J186742 U.S. Copyright Office. Copyright by Byron Co. Public domain photograph of water reservoir, lake, free to use, no copyright restrictions image - Picryl description
![[Pedro Miguel Locks, Panama Canal], Panoramic Photograph](https://cache.getarchive.net/Prod/thumb/cdn18/L3Bob3RvLzIwMTkvMTAvMDQvcGVkcm8tbWlndWVsLWxvY2tzLXBhbmFtYS1jYW5hbC01YWFhMzItMTAyNC5qcGc%3D/40/5/webp "[Pedro Miguel Locks, Panama Canal], Panoramic Photograph")
[Pedro Miguel Locks, Panama Canal], Panoramic Photograph
J190540 U.S. Copyright Office Copyright claimant's address: 143 Baronne St., New Orleans. No. 675. Title derived from copyright deposit records. Copyright deposit; Gordon Panoramic Photo Co.; March 7, 1914; DLC... More
![[Miraflores Locks, Panama Canal], Panoramic Photograph](https://cache.getarchive.net/Prod/thumb/cdn18/L3Bob3RvLzIwMTkvMTEvMTcvbWlyYWZsb3Jlcy1sb2Nrcy1wYW5hbWEtY2FuYWwtYjU5ODYxLTEwMjQuanBn/40/5/webp "[Miraflores Locks, Panama Canal], Panoramic Photograph")
[Miraflores Locks, Panama Canal], Panoramic Photograph
J190542 U.S. Copyright Office Copyright claimant's address: 143 Baronne St., New Orleans. No. 676. Title derived from copyright deposit records. Copyright deposit; Gordon Panoramic Photo Co.; March 7, 1914.
St. Mary's Falls Canal, Soo Locks, Sabin Lock Subcomplex, Northeast Op...
Significance: The Sabin Lock's Northeast Operating Shelter is significant as an element that contributes to the overall integrity of the Soo Lock complex in general. The shelter is also significant as a unique... More
Sign in window, Windsor Locks, Connecticut
Picryl description: Public domain image related to dance, dancing, music, free to use, no copyright restrictions.
Mr. Andrew Lyman, Polish FSA (Farm Security Administration) client and...
Picryl description: Public domain photograph of a farmer, 1930s, 20th-century great depression era, free to use, no copyright restrictions.
Mr. and Mrs. Andrew Lyman, Polish tobacco farmers near Windsor Locks, ...
Public domain photograph of Connecticut in 1930s, free to use, no copyright restrictions image - Picryl description
Textile mill on the Connecticut River at Windsor Locks, Connecticut
Picryl description: Public domain photo of a factory, warehouse, commercial or industrial building, free to use, no copyright restrictions image.
Mr. and Mrs. Andrew Lyman, Polish tobacco farmers near Windsor Locks, ...
Public domain photograph - historical image of Connecticut, United States, free to use, no copyright restrictions image - Picryl description
Windsor Locks, Connecticut. Charms, beadwork, ashtrays, and commercial...
Public domain photograph - historical image of Connecticut, United States, free to use, no copyright restrictions image - Picryl description
Windsor Locks, Connecticut. An Indian who came all the way from Virgin...
Picryl description: Public domain photograph of a farmer, 1930s, 20th-century great depression era, free to use, no copyright restrictions.
Production. Halftrac armoured cars. The engine of a halftrac scout car...
Picryl description: Public domain image of workers, labor, 1940s, economic conditions, free to use, no copyright restrictions.
Entrance to ship locks at Bonneville Dam, Oregon
Picryl description: Public domain image of a power station, dam, electric generator, industrial building, free to use, no copyright restrictions.
Windsor Locks, Connecticut (vicinity). Daughter of Polish tobacco farm...
Picryl description: Public domain image of food, dinner, grocery store, eating, 1930s, mid-20th-century United States, free to use, no copyright restrictions.
Windsor Locks, Connecticut (vicinity). Wife of German farmer
Picryl description: Public domain image of a farmer, 1930s, 20th-century dust bowl era, free to use, no copyright restrictions.
Conversion. Safe and lock company. Assembling the weapons of Victory. ...
Public domain photograph of factory building, free to use, no copyright restrictions image - Picryl description
Gallipolis, Ohio. Katherine Davis going down the Ohio River through th...
Public domain photograph - historical image of Ohio, United States, free to use, no copyright restrictions image - Picryl description
St. Mary's Falls Canal, Soo Locks, Military Defense Subcomplex, Buildi...
Significance: Building No. 5 of the Military Defense subcomplex is significant as an element that contributes to the overall integrity of the Soo Lock complex. The facility also demonstrates the strategic impo... More
St. Lucie Canal, Lock No. 2, Dredge Bypass, St. Lucie, Cross State Can...
Picryl description: Public domain image of a canal, barge, historic place, water reflection, 19th century, free to use, no copyright restrictions.
Spigot Cover and Lock. Paradise Valley, Nevada Folklife Collection
People in photograph: Loveland, Frank Maker: Loveland, Frank Open Public domain photograph of a spacecraft, space exploration, free to use, no copyright restrictions image - Picryl description The Paradise Va... More
New England Air Museum (NEAM) at Bradley International Airport, Windso...
Title, date, and keywords provided by the photographer. Credit line: The George F. Landegger Collection of Connecticut Photographs in the Carol M. Highsmith's America, Library of Congress, Prints and Photograph... More
New England Air Museum (NEAM) at Bradley International Airport, Windso...
Title, date, and keywords provided by the photographer. Credit line: The George F. Landegger Collection of Connecticut Photographs in the Carol M. Highsmith's America, Library of Congress, Prints and Photograph... More
St. Mary's Falls Canal, Soo Locks, Sabin Lock Subcomplex, St. Mary's R...
Significance: Erected between 1913 and 1919, the Sabin Lock subcomplex is significant as a component of the overall Soo complex. As such, it played an integral role in accommodating navigation on the St. Marys... More
Ortona Lock, Lock No. 2, Caloosahatchee River, Cross-State Canal, Okee...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, Ortona Lock and Dam was designed for preventative measures during hurricanes, floods, and droughts while allowing navig... More
Ortona Lock, Lock No. 2, Caloosahatchee River, Cross-State Canal, Okee...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, Ortona Lock and Dam was designed for preventative measures during hurricanes, floods, and droughts while allowing navig... More
Little Kaukauna Lock & Dam, At 23-mile marker on Lower Fox River, Rock...
Significance: The Little Kaukauna Lock and Dam Complex allows passage for watercraft around the rapids present in the Lower Fox River at Little Kaukauna. Survey number: HAER WI-89 Building/structure dates: 18... More
Starved Rock Locks & Dam, Lockmaster's House, Illinois Waterway River ...
Survey number: HAER IL-127-A National Register of Historic Places NRIS Number: 66000325
The Locks, Sault St. Marie, Mich.
Picryl description: Public domain image of park architecture, palace, chateau, open space, 18th, and 19th-century architecture, free to use, no copyright restrictions.
Potowmack Company: Great Falls Canal, Locks No. 3, 4, 5, Great Falls, ...
Survey number: HAER VA-13-C Public domain photograph - historical image of Virginia, United States, free to use, no copyright restrictions image - Picryl description
St. Mary's Falls Canal, Soo Locks, St. Mary's River at Falls, Sault St...
Significance: The locks of the St. Mary's Falls Canal reflect a national level of significance in settlement, transportation, industrial, and engineering history. The completion of the State Locks in 1855 effe... More
Bird's eye view of Gatun Locks, Panama Canal
Stamped on front: "Isthmian Historical Society." Appears to form part of Panama Canal Commission collection transferred from LC Hispanic Division in 1983. Transfer; LC Manuscript Division (Panama Canal Commissi... More
Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie...
Significance: The Appleton Locks and Dams Complex allows passage for watercraft around 1 1/2 miles of rapids as well as a 4 foot falls present in the Lower Fox River at Appleton. Survey number: HAER WI-84 Bui... More
Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie...
Significance: The Appleton Locks and Dams Complex allows passage for watercraft around 1 1/2 miles of rapids as well as a 4 foot falls present in the Lower Fox River at Appleton. Survey number: HAER WI-84 Bui... More
Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie...
Significance: The Appleton Locks and Dams Complex allows passage for watercraft around 1 1/2 miles of rapids as well as a 4 foot falls present in the Lower Fox River at Appleton. Survey number: HAER WI-84 Bui... More
St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, O...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, St. Lucie Lock and Dam was designed for preventive measures during hurricanes, floods, and droughts while allowing navi... More
St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, O...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, St. Lucie Lock and Dam was designed for preventive measures during hurricanes, floods, and droughts while allowing navi... More
St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, O...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, St. Lucie Lock and Dam was designed for preventive measures during hurricanes, floods, and droughts while allowing navi... More
St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, O...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, St. Lucie Lock and Dam was designed for preventive measures during hurricanes, floods, and droughts while allowing navi... More
St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, O...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, St. Lucie Lock and Dam was designed for preventive measures during hurricanes, floods, and droughts while allowing navi... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More
St. Mary's Falls Canal, Soo Locks, Davis Lock Subcomplex, St. Mary's R...
Public domain photograph of construction site, excavation works, free to use, no copyright restrictions image - Picryl description
New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...
Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More
New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...
Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More
New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...
Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More
New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...
Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More
Conrad's Warehouse, Between Locks 38 & 39 on Union Canal, Bernville, B...
Significance: This modest building is a rare survival of the canal era. It reflects the economic impact of the Union Canal. Unprocessed Field note material exists for this structure: FN-5 Survey number: HAER... More
Picryl description: Public domain image of a ship hull, port, harbor, ...
Public domain image with Picryl description as title Public domain photograph of port, ship docks, free to use, no copyright restrictions image - Picryl description
The Locks, S.S. Marie, Mich. - Public domain image. Dry plate negative...
Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.
Pawtucket Canal, Lower Locks, Lowell, Middlesex County, MA
Significance: The Lower Locks are comprised of two navigation locks and a dam, with a head of 17 feet. They were some of the earliest locks in the Lowell Canal System, originally constructed in the first phase... More
Gallipolis Locks & Dam, Dam, Across Ohio River, Gallipolis, Mason Coun...
Significance: The dam consists of eight bays with moveable gates. The roller gates are the most important engineering feature of the site and are the largest in the country. Survey number: HAER WV-58-A
Potowmack Company: Great Falls Canal & Locks, Great Falls, Fairfax Cou...
Significance: The Great Falls Canal was a pioneer effort in the comprehensive development of a river navigation system. Constructed in the years (1786-1802) following the American Revolution, George Washington... More
St. Mary's Falls Canal, Soo Locks, Davis Lock Subcomplex, Northwest Op...
Significance: The Davis Lock's Northwest Operating Shelter is significant as an element that contributes to the overall integrity of the Soo Lock complex in general. The building is also significant as a uniqu... More
The Locks, Sault St. Marie - Glass negative photogrpah. Public domain.
Picryl description: Public domain photograph of building, free to use, no copyright restrictions image.
St. Mary's Falls Canal, Soo Locks, Davis Lock Subcomplex, Davis Lock, ...
Significance: The Davis Lock is significant as an element that contributes to the overall integrity of the Soo Lock complex in general, and the Davis Lock subcomplex in particular. It is a unique facility that... More
Glens Falls Feeder, Sluice, Along south side of Glens Falls Feeder bet...
Significance: The Glens Falls Feeder: Sluice is considered significant for two reasons. The central, stone arch component of this resource represents a unique engineering structure, relative to other lock bypa... More
Glens Falls Feeder, Sluice, Along south side of Glens Falls Feeder bet...
Significance: The Glens Falls Feeder: Sluice is considered significant for two reasons. The central, stone arch component of this resource represents a unique engineering structure, relative to other lock bypa... More
Glens Falls Feeder, Sluice, Along south side of Glens Falls Feeder bet...
Significance: The Glens Falls Feeder: Sluice is considered significant for two reasons. The central, stone arch component of this resource represents a unique engineering structure, relative to other lock bypa... More
Glens Falls Feeder, Sluice, Along south side of Glens Falls Feeder bet...
Significance: The Glens Falls Feeder: Sluice is considered significant for two reasons. The central, stone arch component of this resource represents a unique engineering structure, relative to other lock bypa... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Union Canal Locks, Bernville, Berks County, PA
Significance: The ruins of these locks document 19th-century canal technology, and illustrate the importance of water transportation in the first half of the century. Although the Union Canal failed to become ... More
Union Canal Locks, Bernville, Berks County, PA
Significance: The ruins of these locks document 19th-century canal technology, and illustrate the importance of water transportation in the first half of the century. Although the Union Canal failed to become ... More
James River & Kanawha Canal, Locks 1-5, Tenth to Thirteenth Streets, n...
Significance: From the late eighteenth century until the 1880s, an important and far-flung canal system gradually emerged on the Richmond scene. Envisioned by George Washington and others, the canal system eve... More
James River & Kanawha Canal, Locks 1-5, Tenth to Thirteenth Streets, n...
Significance: From the late eighteenth century until the 1880s, an important and far-flung canal system gradually emerged on the Richmond scene. Envisioned by George Washington and others, the canal system eve... More
James River & Kanawha Canal, Locks 1-5, Tenth to Thirteenth Streets, n...
Significance: From the late eighteenth century until the 1880s, an important and far-flung canal system gradually emerged on the Richmond scene. Envisioned by George Washington and others, the canal system eve... More
Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Mi...
Significance: The Swamp Locks complex consists of a flight of two navigation locks with a dam at the west end of the upper lock. The original locks opened in 1797, and were rebuilt in 1822-1823 when this confi... More
Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Mi...
Significance: The Swamp Locks complex consists of a flight of two navigation locks with a dam at the west end of the upper lock. The original locks opened in 1797, and were rebuilt in 1822-1823 when this confi... More
Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Mi...
Significance: The Swamp Locks complex consists of a flight of two navigation locks with a dam at the west end of the upper lock. The original locks opened in 1797, and were rebuilt in 1822-1823 when this confi... More