Faro de Punta Mulas, Punta Mulas, Isabel Segunda, Vieques Municipio, P...
Significance: The structure was built in 1895. Its background is the capital city of Vieques, Isabel II, and the central hills of the island. Survey number: HAER PR-15 Building/structure dates: 1895 Initial ... More
Perkin's Island Light Station, East side of Kennebec River just south ...
Survey number: HABS ME-190 Public domain photograph - historical image of Washington DC, United States, free to use, no copyright restrictions image - Picryl description
Illinois Waterway, Peoria Lock and Dam, 1071 Wesley Road, Creve Coeur,...
Significance: The Peoria Lock and Dam site is significant as a component of the Illinois Waterway, which provided a navigable route from Lake Michigan to the Mississippi River and beyond. Peoria Dam is also si... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Burlington Northern Railroad Bridge, Spanning Willamette River at Rive...
Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one ... More
Faro de Punta Borinquen, Punta Borinquen, Borinquen, Ponce Municipio, ...
Significance: The original lighthouse was built in 1889 in position 18* 29' 26" N - 67* 9' 43" W, very close to the sea in a low sandy point. In 1918 Puerto Rico experienced an earthquake which had its epicente... More
Mississippi River 9-Foot Channel Project, Lock & Dam No. 13, Upper Mis...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Mississippi River 9-Foot Channel Project, Lock & Dam No. 13, Upper Mis...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Portulan de Charles-Quint donné à Philippe II, accompagné d'une notice...
Available also through the Library of Congress Web site as a raster image.
Haig Point Tabby Ruins, Haig Point Road, Daufuskie Landing, Beaufort C...
Significance: Before its destruction during, or soon after, the Civil War the main house at Haig Point plantation was the largest tabby domestic building erected in coastal South Carolina. Today, the north slav... More
Haig Point Tabby Ruins, Haig Point Road, Daufuskie Landing, Beaufort C...
Significance: Before its destruction during, or soon after, the Civil War the main house at Haig Point plantation was the largest tabby domestic building erected in coastal South Carolina. Today, the north slav... More
Haig Point Tabby Ruins, Haig Point Road, Daufuskie Landing, Beaufort C...
Significance: Before its destruction during, or soon after, the Civil War the main house at Haig Point plantation was the largest tabby domestic building erected in coastal South Carolina. Today, the north slav... More
Haig Point Tabby Ruins, Haig Point Road, Daufuskie Landing, Beaufort C...
Significance: Before its destruction during, or soon after, the Civil War the main house at Haig Point plantation was the largest tabby domestic building erected in coastal South Carolina. Today, the north slav... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26, Alton, ...
Significance: The Upper Mississippi River Nine-Foot Channel Project represents one of the largest and most ambitious river improvement projects ever constructed in the United States. The project's origins date... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26, Alton, ...
Significance: The Upper Mississippi River Nine-Foot Channel Project represents one of the largest and most ambitious river improvement projects ever constructed in the United States. The project's origins date... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26, Alton, ...
Significance: The Upper Mississippi River Nine-Foot Channel Project represents one of the largest and most ambitious river improvement projects ever constructed in the United States. The project's origins date... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26, Alton, ...
Significance: The Upper Mississippi River Nine-Foot Channel Project represents one of the largest and most ambitious river improvement projects ever constructed in the United States. The project's origins date... More
U.S. Coast Guard Cutter WHITE SAGE, U.S. Coast Guard 1st District Base...
Significance: WHITE SAGE was originally constructed as a yard lighter YF 444 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Following... More
U.S. Coast Guard Cutter WHITE SAGE, U.S. Coast Guard 1st District Base...
Significance: WHITE SAGE was originally constructed as a yard lighter YF 444 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Following... More
U.S. Coast Guard Cutter WHITE SAGE, U.S. Coast Guard 1st District Base...
Significance: WHITE SAGE was originally constructed as a yard lighter YF 444 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Following... More
U.S. Coast Guard Cutter WHITE SAGE, U.S. Coast Guard 1st District Base...
Significance: WHITE SAGE was originally constructed as a yard lighter YF 444 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Following... More
U.S. Coast Guard Cutter WHITE SAGE, U.S. Coast Guard 1st District Base...
Significance: WHITE SAGE was originally constructed as a yard lighter YF 444 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Following... More
Illinois Waterway, Dresden Island Lock and Dam , 7521 North Lock Road,...
Significance: The Dresden Island Lock and Dam site is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Complex ...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Complex ...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Complex ...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Ja...
Significance: The Bridgeport Swing Span Railroad Bridge embodies the distinctive characteristics of a type, period and method of construction. Its method of construction (pin-connected) is rare for a swing bri... More
Faro de Punta Tuna, Punta Tuna, Emajagua, Maunabo Municipio, PR
Significance: The Punta Tuna Lighthouse was constructed as a third order lighthouse that showed a white light with a group of two flashes. It served as the most eastern primary light that terminated the Island... More
U.S. Coast Guard Cutter WHITE HOLLY, U.S. Coast Guard 8th District Bas...
Significance: WHITE HOLLY was originally constructed as a yard lighter YF 341 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Followin... More
U.S. Coast Guard Cutter WHITE HOLLY, U.S. Coast Guard 8th District Bas...
Significance: WHITE HOLLY was originally constructed as a yard lighter YF 341 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Followin... More
U.S. Coast Guard Cutter WHITE HOLLY, U.S. Coast Guard 8th District Bas...
Significance: WHITE HOLLY was originally constructed as a yard lighter YF 341 for the U.S. Navy YF 257 class. This class of vessel provided logistical support to naval operations during World War II. Followin... More
Detroit & Cleveland Navigation Company Warehouse, Wayne Street, Detroi...
Unprocessed Field note material exists for this structure: FN-38 Survey number: HABS MI-119 Building/structure dates: 1854 Initial Construction Building/structure dates: 18h2 Subsequent Work
Detroit & Cleveland Navigation Company Warehouse, Wayne Street, Detroi...
Unprocessed Field note material exists for this structure: FN-38 Survey number: HABS MI-119 Building/structure dates: 1854 Initial Construction Building/structure dates: 18h2 Subsequent Work
Detroit & Cleveland Navigation Company Warehouse, Wayne Street, Detroi...
Unprocessed Field note material exists for this structure: FN-38 Survey number: HABS MI-119 Building/structure dates: 1854 Initial Construction Building/structure dates: 18h2 Subsequent Work
Detroit & Cleveland Navigation Company Warehouse, Wayne Street, Detroi...
Unprocessed Field note material exists for this structure: FN-38 Survey number: HABS MI-119 Building/structure dates: 1854 Initial Construction Building/structure dates: 18h2 Subsequent Work
U.S. Coast Guard Cutter SUNDEW, Minnesota Avenue, Duluth, St. Louis Co...
Significance: This vessel was built to serve as a 180' U.S. Coast Guard cutter. The federal government purchased or built thirty-nine of these vessels, built in three sub-classes, from 1942-1944. The U.S. Coa... More
U.S. Coast Guard Cutter SUNDEW, Minnesota Avenue, Duluth, St. Louis Co...
Significance: This vessel was built to serve as a 180' U.S. Coast Guard cutter. The federal government purchased or built thirty-nine of these vessels, built in three sub-classes, from 1942-1944. The U.S. Coa... More
U.S. Coast Guard Cutter SUNDEW, Minnesota Avenue, Duluth, St. Louis Co...
Significance: This vessel was built to serve as a 180' U.S. Coast Guard cutter. The federal government purchased or built thirty-nine of these vessels, built in three sub-classes, from 1942-1944. The U.S. Coa... More
U.S. Coast Guard Cutter SUNDEW, Minnesota Avenue, Duluth, St. Louis Co...
Significance: This vessel was built to serve as a 180' U.S. Coast Guard cutter. The federal government purchased or built thirty-nine of these vessels, built in three sub-classes, from 1942-1944. The U.S. Coa... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite...
Significance: ...Lock and Dam No. 27 constitute additions to the original Upper Mississippi Nine-Foot Channel Project, constructed after World War II. Lock No. 27, located on the Chain of Rocks Canal, provided... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite...
Significance: ...Lock and Dam No. 27 constitute additions to the original Upper Mississippi Nine-Foot Channel Project, constructed after World War II. Lock No. 27, located on the Chain of Rocks Canal, provided... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite...
Significance: ...Lock and Dam No. 27 constitute additions to the original Upper Mississippi Nine-Foot Channel Project, constructed after World War II. Lock No. 27, located on the Chain of Rocks Canal, provided... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite...
Significance: ...Lock and Dam No. 27 constitute additions to the original Upper Mississippi Nine-Foot Channel Project, constructed after World War II. Lock No. 27, located on the Chain of Rocks Canal, provided... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...
Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...
Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...
Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...
Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More
Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia Ri...
Survey number: HAER OR-11-D Building/structure dates: 1937 Initial Construction
Bonneville Project, Navigation Lock No. 1, Oregon shore of Columbia Ri...
Survey number: HAER OR-11-D Building/structure dates: 1937 Initial Construction
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Picryl description: Public domain photograph of a road works, construction, excavation, free to use, no copyright restrictions.
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Picryl description: Public domain image of a bridge over a water stream, free to use, no copyright restrictions.
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Public domain photo of a monument, historic place, free to use, no copyright restrictions image - Picryl description
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Public domain photograph - historical image of Mississippi, United States, free to use, no copyright restrictions image - Picryl description
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Public domain photograph - historical image of Mississippi, United States, free to use, no copyright restrictions image - Picryl description
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Public domain photograph of railway map, railroad tracks, free to use, no copyright restrictions image - Picryl description
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
Dredge CINCINNATI, Docked on Ohio River at foot of Lighthill Street, P...
Significance: The Cincinnati is a "dipper dredge," particularly suited to the shallow, rocky conditions of American inland waterways. The dredge operated for 78 years on the Ohio River and its tributaries. Th... 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
Isla de Mona Light, Mona Island, Cabo Rojo, Cabo Rojo Municipio, PR
Significance: Mona Island Light is the only existing lighthouse for which two entirely different plans were drawn between 1885-1886. The first plan called for a 2nd class light, 22 miles range light beam, 3 ke... More
Isla de Mona Light, Mona Island, Cabo Rojo, Cabo Rojo Municipio, PR
Significance: Mona Island Light is the only existing lighthouse for which two entirely different plans were drawn between 1885-1886. The first plan called for a 2nd class light, 22 miles range light beam, 3 ke... More
Isla de Mona Light, Mona Island, Cabo Rojo, Cabo Rojo Municipio, PR
Significance: Mona Island Light is the only existing lighthouse for which two entirely different plans were drawn between 1885-1886. The first plan called for a 2nd class light, 22 miles range light beam, 3 ke... More
Isla de Mona Light, Mona Island, Cabo Rojo, Cabo Rojo Municipio, PR
Significance: Mona Island Light is the only existing lighthouse for which two entirely different plans were drawn between 1885-1886. The first plan called for a 2nd class light, 22 miles range light beam, 3 ke... More
Isla de Mona Light, Mona Island, Cabo Rojo, Cabo Rojo Municipio, PR
Significance: Mona Island Light is the only existing lighthouse for which two entirely different plans were drawn between 1885-1886. The first plan called for a 2nd class light, 22 miles range light beam, 3 ke... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With root in the Progressive Era, the project was adopted by New Deal propo... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With root in the Progressive Era, the project was adopted by New Deal propo... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With root in the Progressive Era, the project was adopted by New Deal propo... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With root in the Progressive Era, the project was adopted by New Deal propo... 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