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
Edwards Air Force Base, North Base, North Base Road, Boron, Kern Count...
Significance: North Base originated as a remote, secret facility to test the United States' first jet-propelled military aircraft, the Bell XP-59A Airacomet. During World War II, facilities grew to accommodate... More
Edwards Air Force Base, North Base, North Base Road, Boron, Kern Count...
Significance: North Base originated as a remote, secret facility to test the United States' first jet-propelled military aircraft, the Bell XP-59A Airacomet. During World War II, facilities grew to accommodate... 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 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
Oakland Harbor Training Walls, Mouth of Federal Channel to Inner Harbo...
Significance: The North Training Wall is one component of the Oakland Harbor Training Walls, which defined Oakland's basic harbor footprint and are the oldest surviving remnants of nineteenth-century harbor imp... More
Oakland Harbor Training Walls, Mouth of Federal Channel to Inner Harbo...
Significance: The North Training Wall is one component of the Oakland Harbor Training Walls, which defined Oakland's basic harbor footprint and are the oldest surviving remnants of nineteenth-century harbor imp... More
Oakland Harbor Training Walls, Mouth of Federal Channel to Inner Harbo...
Significance: The North Training Wall is one component of the Oakland Harbor Training Walls, which defined Oakland's basic harbor footprint and are the oldest surviving remnants of nineteenth-century harbor imp... More
Oakland Harbor Training Walls, Mouth of Federal Channel to Inner Harbo...
Significance: The North Training Wall is one component of the Oakland Harbor Training Walls, which defined Oakland's basic harbor footprint and are the oldest surviving remnants of nineteenth-century harbor imp... 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
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
Cape Canaveral Air Station, Launch Complex 17, Facility 28501, East en...
Survey number: HAER FL-8-5-B Building/structure dates: 1956 Initial Construction National Register of Historic Places NRIS Number: 84003872
Cape Canaveral Air Station, Launch Complex 17, Facility 28501, East en...
Survey number: HAER FL-8-5-B Building/structure dates: 1956 Initial Construction National Register of Historic Places NRIS Number: 84003872
Cape Canaveral Air Station, Launch Complex 17, Facility 28501, East en...
Survey number: HAER FL-8-5-B Building/structure dates: 1956 Initial Construction National Register of Historic Places NRIS Number: 84003872
Cape Canaveral Air Station, Launch Complex 17, Facility 28501, East en...
Survey number: HAER FL-8-5-B Building/structure dates: 1956 Initial Construction National Register of Historic Places NRIS Number: 84003872
Cape Canaveral Air Station, Launch Complex 17, Facility 28501, East en...
Survey number: HAER FL-8-5-B Building/structure dates: 1956 Initial Construction National Register of Historic Places NRIS Number: 84003872
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
Blossom Point Farm, La Plata, Charles County, MD
Significance: Although architecturally simple in design, the Ballast House contains exceptionally fine, attractive 18th century style interior woodwork in remarkably good condition. The original kitchen, once ... More
Blossom Point Farm, La Plata, Charles County, MD
Significance: Although architecturally simple in design, the Ballast House contains exceptionally fine, attractive 18th century style interior woodwork in remarkably good condition. The original kitchen, once ... More
Blossom Point Farm, La Plata, Charles County, MD
Significance: Although architecturally simple in design, the Ballast House contains exceptionally fine, attractive 18th century style interior woodwork in remarkably good condition. The original kitchen, once ... More
Blossom Point Farm, La Plata, Charles County, MD
Significance: Although architecturally simple in design, the Ballast House contains exceptionally fine, attractive 18th century style interior woodwork in remarkably good condition. The original kitchen, once ... 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
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
Cape Canaveral Air Station, Launch Complex 17, Facility 28416, East en...
Survey number: HAER FL-8-5-C Building/structure dates: 1956 Initial Construction National Register of Historic Places NRIS Number: 84003872
Holston Army Ammunition Plant, RDX-and-Composition-B Manufacturing Lin...
Significance: Line 9 is highly representative of the 10 production lines constructed at HSAAP during WWII for the manufacture of the military high explosive Composition B, and its chief ingredient RDX. These bu... More
Holston Army Ammunition Plant, RDX-and-Composition-B Manufacturing Lin...
Significance: Line 9 is highly representative of the 10 production lines constructed at HSAAP during WWII for the manufacture of the military high explosive Composition B, and its chief ingredient RDX. These bu... More
Holston Army Ammunition Plant, RDX-and-Composition-B Manufacturing Lin...
Significance: Line 9 is highly representative of the 10 production lines constructed at HSAAP during WWII for the manufacture of the military high explosive Composition B, and its chief ingredient RDX. These bu... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5A, Win...
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. 5, Minn...
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. 5, Minn...
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. 5, Minn...
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
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... More
Nike Missile Battery MS-40, County Road No. 260, Farmington, Dakota Co...
Significance: The Nike missile system, first developed in the 1950s, was the United States' first and most widely deployed air defense missile system. Nike installations were a critical element in national air... 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
Library of Congress, Northeast corner of First Street & Independence A...
Significance: The nation's "main" library, the Library of Congress serves not only Congress but also acts as central source for resources collection and for copyright. Building is one of the world's largest an... More
Library of Congress, Northeast corner of First Street & Independence A...
Significance: The nation's "main" library, the Library of Congress serves not only Congress but also acts as central source for resources collection and for copyright. Building is one of the world's largest an... 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
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
Rock Creek Park Road System, Washington, District of Columbia, DC
Significance: Rock Creek Park was created in 1890 to preserve a large section of the wooded valley formed by Rock Creek as a "public park and pleasuring ground" for the nation's capital. Rock Creek Park is one... More
Rock Creek Park Road System, Washington, District of Columbia, DC
Significance: Rock Creek Park was created in 1890 to preserve a large section of the wooded valley formed by Rock Creek as a "public park and pleasuring ground" for the nation's capital. Rock Creek Park is one... More
Rock Creek Park Road System, Washington, District of Columbia, DC
Significance: Rock Creek Park was created in 1890 to preserve a large section of the wooded valley formed by Rock Creek as a "public park and pleasuring ground" for the nation's capital. Rock Creek Park is one... More
Knight's Ferry Bridge, Spanning Stanislaus River, bypassed section of ...
See HABS No. CA-158, Covered Bridge for further information 3 photos. Significance: The Knight's Ferry Bridge was built in 1863-64 to replace an 1857 uncovered wooden truss that was destroyed in a flood. This ... More
Upper White River Lock & Dam Nos. 1, 2, & 3, Spanning White River, Bat...
Survey number: HAER AR-91 Building/structure dates: 1900 Initial Construction
Upper White River Lock & Dam Nos. 1, 2, & 3, Spanning White River, Bat...
Survey number: HAER AR-91 Building/structure dates: 1900 Initial Construction
Upper White River Lock & Dam Nos. 1, 2, & 3, Spanning White River, Bat...
Survey number: HAER AR-91 Building/structure dates: 1900 Initial Construction
Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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 Nine-Foot Channel Project, Lock & Dam No. 25, ...
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