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A large body of water with a dam in the background. Lock weir high water.

A large body of water with a dam in the background. Lock weir high wat...

The dam is surrounded by water / The dam is being built / Public domain stock photo of a ship.

A metal padlock with a key attached to it. Lock padlock security.

A metal padlock with a key attached to it. Lock padlock security.

Stock photo: A lock with a lock on it / A metal padlock with a key attached to it.

A bicycle parked next to a tree on a sidewalk. Bicycle bike helmet.

A bicycle parked next to a tree on a sidewalk. Bicycle bike helmet.

A bicycle chained to a pole on a sidewalk / A bike parked next to a tree on a sidewalk / Public domain photo of a park, nature.

A padlock with a red heart on it. Lock padlock heart.

A padlock with a red heart on it. Lock padlock heart.

A lock with a heart and a heart on it / A blue metal padlock with a heart on it / Public domain stock photo of a ship.

Tourist Attraction - Doors church entrance, religion. A gazebo in the middle of a garden

Tourist Attraction - Doors church entrance, religion. A gazebo in the ...

Architecture stock photograph: The round house at the entrance to the museum / A gazebo in the middle of a garden.

A rusty padlock on a wooden door. Lock door latch.

A rusty padlock on a wooden door. Lock door latch.

A door with a lock and a handle / A padlock on a door of a building public domain stock photo.

Congressman Chuck Fleischmann, Tennessee District 3,

Congressman Chuck Fleischmann, Tennessee District 3,

Congressman Chuck Fleischmann, Tennessee District 3, addresses the media about the cofferdam stabilization project and the restart of work on the new Chickamauga Lock on the Tennessee River in Chattanooga, Tenn... More

This is the Chickamauga Lock and Dam in Chattanooga,

This is the Chickamauga Lock and Dam in Chattanooga,

This is the Chickamauga Lock and Dam in Chattanooga, Tenn., Sept. 29, 2010.

CV-22 Osprey flight engineers Staff Sgt. Eric Wiggins

CV-22 Osprey flight engineers Staff Sgt. Eric Wiggins

CV-22 Osprey flight engineers Staff Sgt. Eric Wiggins from the 8th Special Operations Squadron "Black Birds" pre-flights his plane, Jan. 26, before a local training mission at Hurlburt Field, Fla. The CV-22 Osp... More

Douglas Lamont, senior official performing duties of

Douglas Lamont, senior official performing duties of

Douglas Lamont, senior official performing duties of secretary of the Army for Civil Works, tours the deteriorating Chickamauga Lock Feb. 28, 2017 in Chattanooga, Tenn., with U.S. Army Corps of Engineers Nashvi... More

CV-22 Osprey flight engineer Staff Sgt. Eric Wiggins

CV-22 Osprey flight engineer Staff Sgt. Eric Wiggins

CV-22 Osprey flight engineer Staff Sgt. Eric Wiggins from the 8th Special Operations Squadron "Black Birds" pre-flights his plane, Jan. 26, before a local training mission at Hurlburt Field, Fla. The CV-22 Ospr... More

Illinois Waterway, Starved Rock Lock and Dam , 950 North 27th Road, Utica, La Salle County, IL

Illinois Waterway, Starved Rock Lock and Dam , 950 North 27th Road, Ut...

Survey number: HAER IL-164-D National Register of Historic Places NRIS Number: 04000166

Illinois Waterway, Starved Rock Lock and Dam , 950 North 27th Road, Utica, La Salle County, IL

Illinois Waterway, Starved Rock Lock and Dam , 950 North 27th Road, Ut...

Survey number: HAER IL-164-D National Register of Historic Places NRIS Number: 04000166

Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, Upper Mississipi River (Arsenal Island), Rock Island, Rock Island County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, 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. 15, Upper Mississipi River (Arsenal Island), Rock Island, Rock Island County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, 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. 15, Upper Mississipi River (Arsenal Island), Rock Island, Rock Island County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, 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. 15, Upper Mississipi River (Arsenal Island), Rock Island, Rock Island County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, 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. 15, Upper Mississipi River (Arsenal Island), Rock Island, Rock Island County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, 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. 15, Upper Mississipi River (Arsenal Island), Rock Island, Rock Island County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, 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

[Canal ("Washington Canal"), Washington, D.C. Lock details and sections]

[Canal ("Washington Canal"), Washington, D.C. Lock details and section...

Inscriptions on recto: "Washington City Canal 1810-11-" "Details of the Gates of the Locks. " "The Manor of hanging the Gates at the upper part is detailed on the sheet representing the lower Gates. " "Ma... More

Rapide Croche Lock & Dam, Lockkeeper's Residence, Approximately 115 feet north of lock, Wrightstown, Brown County, WI

Rapide Croche Lock & Dam, Lockkeeper's Residence, Approximately 115 fe...

Significance: The Lockkeeper's house served as an on-site residence for the lockkeeper responsible for controlling the locks. In addition, the house served as a residence for the lockkeeper's family. The reside... More

Chesapeake & Ohio Canal, Great Falls Tavern, Lock 20, MacArthur Boulevard Vicinity, Great Falls, Montgomery County, MD

Chesapeake & Ohio Canal, Great Falls Tavern, Lock 20, MacArthur Boulev...

See HABS No. DC-147 for a list of other Chesapeake & Ohio Canal structures. Unprocessed Field note material exists for this structure: FN-41, FN-42 Survey number: HABS MD-56-R

John Hanna House, Township Route 359, approximately 1700 feet West of Water Street, Lock Haven, Clinton County, PA

John Hanna House, Township Route 359, approximately 1700 feet West of ...

Photo caption pages & written data include site & floor plans. Significance: The early 19th century John Hanna House is significant for its association with the Hanna family, for its architectural style and mat... More

Ortona Lock, Lock No. 2, Caloosahatchee River, Cross-State Canal, Okeechobee Intracoastal Waterway, Ortona, Glades County, FL

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

Illinois Waterway, Brandon Road Lock and Dam , 1100 Brandon Road, Joliet, Will County, IL

Illinois Waterway, Brandon Road Lock and Dam , 1100 Brandon Road, Joli...

Picryl description: Public domain photograph of a dock, harbor, boats, water, free to use, no copyright restrictions.

Illinois Waterway, Brandon Road Lock and Dam , 1100 Brandon Road, Joliet, Will County, IL

Illinois Waterway, Brandon Road Lock and Dam , 1100 Brandon Road, Joli...

Public domain photograph - historical image of Illinois, United States, free to use, no copyright restrictions image - Picryl description

Chesapeake & Ohio Canal, Section House, Above Lock 66, 156 miles above tidewater, Oldtown, Allegany County, MD

Chesapeake & Ohio Canal, Section House, Above Lock 66, 156 miles above...

See also HABS No. DC-147 for list of other C&O Canal structures. Survey number: HABS MD-807

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Gre...

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Impr... More

Chesapeake & Ohio Canal, Lockhouse at Lock 72, 174.4 miles above tidewater, Oldtown, Allegany County, MD

Chesapeake & Ohio Canal, Lockhouse at Lock 72, 174.4 miles above tidew...

See HABS No. DC-147 for list of other C&O Canal structures. Unprocessed Field note material exists for this structure: FN-62 Survey number: HABS MD-818

Moore Haven Lock, Spillway, Cross-State Canal, Okeechobee Intracoastal Waterway, Moore Haven, Glades County, FL

Moore Haven Lock, Spillway, Cross-State Canal, Okeechobee Intracoastal...

Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1965, the Moore Haven Spillway was designed for preventative measures during hurricanes, floods, and droughts. Survey number... More

Philadelphia & Reading Railroad, Peacock's Lock Viaduct, Spanning Schuykill River at Reading Railroad, Reading, Berks County, PA

Philadelphia & Reading Railroad, Peacock's Lock Viaduct, Spanning Schu...

Significance: The Peacock's Lock Viaduct, named after a nearby lock on the Schuylkill Division Canal, may be the only masonry arch bridge in the U.S. with pierced spandrels. The circular openings between arche... More

Philadelphia & Reading Railroad, Peacock's Lock Viaduct, Spanning Schuykill River at Reading Railroad, Reading, Berks County, PA

Philadelphia & Reading Railroad, Peacock's Lock Viaduct, Spanning Schu...

Significance: The Peacock's Lock Viaduct, named after a nearby lock on the Schuylkill Division Canal, may be the only masonry arch bridge in the U.S. with pierced spandrels. The circular openings between arche... More

Monongahela Railroad, New Geneva Bridge, Spanning Monongahela River, South of Lock & Dam No. 7, New Geneva, Fayette County, PA

Monongahela Railroad, New Geneva Bridge, Spanning Monongahela River, S...

Significance: The bridge at New Geneva is significant for its long Petit through through truss, and more importantly, for its erection by end manufacturing. At the time of its construction, it was the longest a... More

Andrew Vosburg House, 302 East Church Street, Lock Haven, Clinton County, PA

Andrew Vosburg House, 302 East Church Street, Lock Haven, Clinton Coun...

Significance: The architecture is typical of the Greek Revival style found in Lock Haven in the decade before the Civil War. Nearly all of these examples are either gone or at this point in time, highly threate... More

Andrew Vosburg House, 302 East Church Street, Lock Haven, Clinton County, PA

Andrew Vosburg House, 302 East Church Street, Lock Haven, Clinton Coun...

Significance: The architecture is typical of the Greek Revival style found in Lock Haven in the decade before the Civil War. Nearly all of these examples are either gone or at this point in time, highly threate... More

Potowmack Company: Great Falls Canal, Lock No. 1, Great Falls, Fairfax County, Virginia

Potowmack Company: Great Falls Canal, Lock No. 1, Great Falls, Fairfax...

Survey number: HAER VA-13-A Public domain images of ruins, 19th-20th century, free to use, no copyright restrictions image - Picryl description

Potowmack Company: Great Falls Canal, Lock No. 1, Great Falls, Fairfax County, Virginia

Potowmack Company: Great Falls Canal, Lock No. 1, Great Falls, Fairfax...

Survey number: HAER VA-13-A Public domain images of ruins, 19th-20th century, free to use, no copyright restrictions image - Picryl description

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater (above Lock 27), Dickerson, Montgomery County, MD

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater...

Unprocessed Field note material exists for this structure: FN-25 Survey number: HABS MD-19 Building/structure dates: 1833 Initial Construction

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater (above Lock 27), Dickerson, Montgomery County, MD

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater...

Unprocessed Field note material exists for this structure: FN-25 Survey number: HABS MD-19 Building/structure dates: 1833 Initial Construction

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater (above Lock 27), Dickerson, Montgomery County, MD

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater...

Unprocessed Field note material exists for this structure: FN-25 Survey number: HABS MD-19 Building/structure dates: 1833 Initial Construction

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater (above Lock 27), Dickerson, Montgomery County, MD

Chesapeake & Ohio Canal, Monocacy Aqueduct, 42.2 Miles above Tidewater...

Unprocessed Field note material exists for this structure: FN-25 Survey number: HABS MD-19 Building/structure dates: 1833 Initial Construction

Samuel Probst Farm, Summer Kitchen, Farrandsville Road, approximately 2.1 miles Northwest of Jay Street Bridge, Lock Haven, Clinton County, PA

Samuel Probst Farm, Summer Kitchen, Farrandsville Road, approximately ...

Photo caption pages include a site plan & written data includes floor plans. Significance: As a domestic outbuilding constructed ca. 1916, this summer kitchen contributes to the character of the Samuel Probst F... More

Kanawha River Lock & Dam No. 11, Lockmaster's House, West side, U.S. Route 35, Clendenin, Kanawha County, WV

Kanawha River Lock & Dam No. 11, Lockmaster's House, West side, U.S. R...

Significance: This masonry house, built by the U.S. Army Corps of Engineers ca. 1900, was constructed as a residence for the master of Kanawha River Lock and Dam No. 11. Survey number: HABS WV-287-B Building/... More

Kanawha River Lock & Dam No. 11, Lockmaster's House, West side, U.S. Route 35, Clendenin, Kanawha County, WV

Kanawha River Lock & Dam No. 11, Lockmaster's House, West side, U.S. R...

Significance: This masonry house, built by the U.S. Army Corps of Engineers ca. 1900, was constructed as a residence for the master of Kanawha River Lock and Dam No. 11. Survey number: HABS WV-287-B Building/... More

Warrior River, Lock No. 3 Wall, River Road at University Park, Tuscaloosa, Tuscaloosa County, AL

Warrior River, Lock No. 3 Wall, River Road at University Park, Tuscalo...

Significance: The Warrior River lock, dam and quarry sites along the Tuscaloosa riverfront constitute the best surviving remains of an extensive system of locks and dams that opened river transportation for the... More

Chesapeake & Ohio Canal, Stop Lock at Dam No. 4, 85.62 miles above tidewater, Sharpsburg, Washington County, MD

Chesapeake & Ohio Canal, Stop Lock at Dam No. 4, 85.62 miles above tid...

Significance: The Stop Lock at Dam Number Four served to prevent back flooding of the canal above the dam during periods of high water and also served to prevent the loss of water from the canal during emergenc... More

Mississippi River 9-Foot Channel Project, Lock & Dam No. 16, Upper Mississippi River, Muscatine, Muscatine County, IA

Mississippi River 9-Foot Channel Project, Lock & Dam No. 16, 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. 16, Upper Mississippi River, Muscatine, Muscatine County, IA

Mississippi River 9-Foot Channel Project, Lock & Dam No. 16, 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

St. Lucie Canal, Lock No. 1, Machinery Houses, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

St. Lucie Canal, Lock No. 1, Machinery Houses, St. Lucie, Cross State ...

Significance: The machine houses are integral components of the St. Lucie Lock No. 1 complex. Survey number: HAER FL-20-A-2 Building/structure dates: 1941 Initial Construction

121-123 Mill Street (Duplex), Lock Haven, Clinton County, PA

121-123 Mill Street (Duplex), Lock Haven, Clinton County, PA

Photo caption pages & written data include site & floor plans. Significance: The building at 121+123 Mill Street is included in a locally significant historic neighborhood which contains architecturally impress... More

I'll give you a lock of my hair
Illinois Waterway, Marseilles Lock and Dam, 1 Hawk Drive, Marseilles, La Salle County, IL

Illinois Waterway, Marseilles Lock and Dam, 1 Hawk Drive, Marseilles, ...

Significance: Marseilles Lock and Dam Historic District 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 b... More

Sandy Lake Reservoir Dam & Lock, McGregor, Aitkin County, MN

Sandy Lake Reservoir Dam & Lock, McGregor, Aitkin County, MN

Significance: The Sandy Lake Reservoir Dam and Lock is one of six Mississippi River Headwaters dam sites that are historically significant for their association with navigation, commerce, tourism, the Ojibway I... More

Sandy Lake Reservoir Dam & Lock, McGregor, Aitkin County, MN

Sandy Lake Reservoir Dam & Lock, McGregor, Aitkin County, MN

Significance: The Sandy Lake Reservoir Dam and Lock is one of six Mississippi River Headwaters dam sites that are historically significant for their association with navigation, commerce, tourism, the Ojibway I... More

St. Lucie Canal, Lock No. 1, Hydroelectric Power House, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

St. Lucie Canal, Lock No. 1, Hydroelectric Power House, St. Lucie, Cro...

Significance: The power house is an integral component of the lock and dam system created in 1941. Survey number: HAER FL-20-A-3 Building/structure dates: 1941 Initial Construction

St. Lucie Canal, Lock No. 1, Hydroelectric Power House, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

St. Lucie Canal, Lock No. 1, Hydroelectric Power House, St. Lucie, Cro...

Significance: The power house is an integral component of the lock and dam system created in 1941. Survey number: HAER FL-20-A-3 Building/structure dates: 1941 Initial Construction

Chesapeake & Ohio Canal, Lock 36, 62.4 miles above tidewater, Sharpsburg, Washington County, MD

Chesapeake & Ohio Canal, Lock 36, 62.4 miles above tidewater, Sharpsbu...

Unprocessed Field note material exists for this structure: FN-115 Survey number: HABS MD-775

Mississippi River 9-Foot Channel, Lock & Dam No. 14, Upper Mississippi River, Le Claire, Scott County, IA

Mississippi River 9-Foot Channel, Lock & Dam No. 14, Upper Mississippi...

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, Lock & Dam No. 14, Upper Mississippi River, Le Claire, Scott County, IA

Mississippi River 9-Foot Channel, Lock & Dam No. 14, Upper Mississippi...

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

Chesapeake & Ohio Canal, Lock No. 32, Mile 60.7, Sharpsburg, Washington County, MD

Chesapeake & Ohio Canal, Lock No. 32, Mile 60.7, Sharpsburg, Washingto...

For additional documentation, see also Chesapeake & Ohio Canal, Lock 32 (HABS MD-759) Unprocessed Field note material exists for this structure: FN-17 Survey number: HAER MD-27-A

Ohio & Erie Canal, Typical Lock Gates, Canal Road between Rockside Road & Fitzwater Road, Valley View, Cuyahoga County, OH

Ohio & Erie Canal, Typical Lock Gates, Canal Road between Rockside Roa...

Significance: From its opening in 1827 until the mid-1840s, the Ohio and Erie Canal served as the sole mode of transportation through the otherwise unbroken wilderness of northeast Ohio. Linking the Ohio River... More

Illinois & Michigan Canal, Lift Lock No. 7 & Control Gate, East side of DuPage River, Channahon, Will County, IL

Illinois & Michigan Canal, Lift Lock No. 7 & Control Gate, East side o...

Significance: Lift Lock No. 7 is one of the fifteen lift-locks designed by William Gooding, chief engineer of Illinois and Michigan Canal. Adjacent to Lock No. 7 is a control gate that allows water into the ca... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...

Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More

Mississippi River 9-Foot Channel Project, Lock & Dam No. 17, Upper Mississippi River, New Boston, Mercer County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 17, 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. 17, Upper Mississippi River, New Boston, Mercer County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 17, 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. 17, Upper Mississippi River, New Boston, Mercer County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 17, 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. 17, Upper Mississippi River, New Boston, Mercer County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 17, 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. 17, Upper Mississippi River, New Boston, Mercer County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 17, 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. 17, Upper Mississippi River, New Boston, Mercer County, IL

Mississippi River 9-Foot Channel Project, Lock & Dam No. 17, 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

Chesapeake & Ohio Canal, Lock Tender's House, Lock 37, 67.0 miles above tidewater, Antietam, Washington County, MD

Chesapeake & Ohio Canal, Lock Tender's House, Lock 37, 67.0 miles abov...

Public domain scan of an architecture diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.

Blackstone Canal Lock No. 24, East of MA 122, Millville, Worcester County, MA

Blackstone Canal Lock No. 24, East of MA 122, Millville, Worcester Cou...

Survey number: HAER MA-78 Public domain images of ruins, 19th-20th century, free to use, no copyright restrictions image - Picryl description

St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

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, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

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, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

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, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

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, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

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, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton,...

Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstrea... More

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton,...

Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstrea... More

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton,...

Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstrea... More

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton,...

Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstrea... More

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton,...

Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstrea... More

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton,...

Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstrea... More

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton,...

Significance: ...Lock and Dam NO. 26R constitute the first replacements of an original element of the Nine-Foot Channel Project. The new installation will replace Lock and Dam No. 26, located two miles upstrea... More

West Branch Pennsylvania Canal, South of State Route 664 along North bank of West Branch of Susquehanna River, 2,000 feet East of Jay Street Bridge, Lock Haven, Clinton County, PA

West Branch Pennsylvania Canal, South of State Route 664 along North b...

Significance: An important link in the statewide transportation network of the nineteenth century, the West Branch Pennsylvania Canal did much to economically develop the valley of the West Branch of the Susque... More

Mississippi River 9-Foot Channel, Lock & Dam No. 1, In Mississippi River at Mississippi Boulevard, below Ford Parkway Bridge, Saint Paul, Ramsey County, MN

Mississippi River 9-Foot Channel, Lock & Dam No. 1, In Mississippi Riv...

Significance: Lock and Dam No. 1 is significant because it symbolizes important local and national events and trends, and because it possesses a rare and unique design. In 1894, Congress authorized two locks a... More

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outagamie County, WI

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, Outagamie County, WI

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

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie County, WI

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie Co...

Significance: The Kaukauna Locks and Dam Complex provides passage around drop in elevation of 50 feet in the Lower Fox River at Kaukauna. The complex served as an integral part of the Lower Fox River Waterway ... More

116-118 Mill Street (Duplex), Lock Haven, Clinton County, PA

116-118 Mill Street (Duplex), Lock Haven, Clinton County, PA

Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description

Mississippi River 9-Foot Channel Project, Lock & Dam No. 11, Upper Mississippi River, Dubuque, Dubuque County, IA

Mississippi River 9-Foot Channel Project, Lock & Dam No. 11, 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

Chesapeake & Ohio Canal, Feeder Lock, Lock 55, 134.1 miles above tidewater, Hancock, Washington County, MD

Chesapeake & Ohio Canal, Feeder Lock, Lock 55, 134.1 miles above tidew...

Picryl description: Public domain image of ruins, historic place, landmark, classical architecture, free to use, no copyright restrictions.

Willamette Falls Lock Chamber No.1, Willamette River, West Linn, Clackamas County, OR

Willamette Falls Lock Chamber No.1, Willamette River, West Linn, Clack...

Picryl description: Public domain image of a canal, barge, historic place, water reflection, 19th century, free to use, no copyright restrictions.

Chesapeake & Ohio Canal, Lockhouse at Lock 25, Edward's Ferry Road, 30.8 miles above tidewater, Seneca, Montgomery County, MD

Chesapeake & Ohio Canal, Lockhouse at Lock 25, Edward's Ferry Road, 30...

Survey number: HABS MD-738 Public domain photograph - historical image of Ohio, United States, free to use, no copyright restrictions image - Picryl description

Chesapeake & Ohio Canal, Lock 31, 58.0 miles above tidewater (U.S. Route 340 Vicinity), Weverton, Washington County, MD

Chesapeake & Ohio Canal, Lock 31, 58.0 miles above tidewater (U.S. Rou...

Survey number: HABS MD-755 Public domain photograph - historical image of Ohio, United States, free to use, no copyright restrictions image - Picryl description

Morris Canal, Guard Lock 5 West, Saxton Falls, Warren County, NJ

Morris Canal, Guard Lock 5 West, Saxton Falls, Warren County, NJ

Significance: Although recent repairs have covered some of the original masonry, Guard Lock 5 West and its adjacent canal prism at Saxon Falls are well preserved and nearly intact. The term "guard lock" refers... More

St. Lucie Canal, Lock No. 1, Attendant's Quarters, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

St. Lucie Canal, Lock No. 1, Attendant's Quarters, St. Lucie, Cross St...

Significance: The attendants quarters were essential to the successful operation of the lock and dam. Their presence allowed the continual operation and maintenance of the facility. Survey number: HAER FL-20-A... More

St. Lucie Canal, Lock No. 1, Attendant's Quarters, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

St. Lucie Canal, Lock No. 1, Attendant's Quarters, St. Lucie, Cross St...

Significance: The attendants quarters were essential to the successful operation of the lock and dam. Their presence allowed the continual operation and maintenance of the facility. Survey number: HAER FL-20-A... More

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