Variable Angle Launcher Complex, Control Station, CA State Highway 39 ...
Significance: Morris Dam Test Facility (MDTF) was built at the Morris Dam Reservoir for the purpose of obtaining basic hydrodynamic data for use in design and development of Naval Ordinance, particularly air-to... More
Vandenberg Air Force Base, Space Launch Complex 3, Napa & Alden Roads,...
Significance: Space Launch Complex 3 (SLC-3) is one of the first operational installations in the United States military space program. The complex was constructed in 1959 to launch satellites into polar orbit... More
Vandenberg Air Force Base, Space Launch Complex 3, Napa & Alden Roads,...
Significance: Space Launch Complex 3 (SLC-3) is one of the first operational installations in the United States military space program. The complex was constructed in 1959 to launch satellites into polar orbit... More
Silver King Mining Company, Mineshaft & Main Hoist, Woodside Gulch, Pa...
Significance: The Silver King Mining Company became one of the major producers in the Park City district of Utah and attained a brief reputation as the richest silver mine in the known world. One of the smalle... More
Bishop Creek Hydroelectric System, Control Station, Operations Buildin...
Significance: Building 102 Control Station (formerly Operations Building #1, Control Station) was constructed as the first operations building at the control station for the Bishop Creek Hydroelectric System in... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Glenn L. Martin Company, Titan Missile Test Facilities, Control Buildi...
Significance: This blastproof enclosure enabled technicians to conduct and observe the captive firings at Test Stands D-1 and D-2. The Control Building also served as a training center for launch crews and as a... More
Arlington Memorial Bridge, Spanning Potomac River between Lincoln Memo...
Significance: As the final link in the chain of monuments which start at the Capitol building, the Arlington Memorial Bridge connects the Mall in Washington, DC with Arlington National Cemetery in Virginia. De... More
Arlington Memorial Bridge, Spanning Potomac River between Lincoln Memo...
Significance: As the final link in the chain of monuments which start at the Capitol building, the Arlington Memorial Bridge connects the Mall in Washington, DC with Arlington National Cemetery in Virginia. De... More
Jet Propulsion Laboratory Edwards Facility, Control & Recording Center...
Unprocessed Field note material exists for this structure: N199 Survey number: HAER CA-163-J
New Haven Rail Yard, Interlocking Control Building, Vicinity of Union ...
Significance: The Interlocking Control Building is significant because its console, relays and other internal components represent an early use of centralized train control on a major railroad. The console mon... More
Columbia Basin Project, Grand Coulee Siphon Breaker Building, Grand Co...
Significance: The Siphon-Breaker Building played a small but critical role in the process of delivering water from the Columbia River to the irrigation system. Its main function was to manage the flow at the to... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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
Main Street Bridge, Spanning Fox River on Main Street, Green Bay, Brow...
Significance: The Main Street Bridge is a double-leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Green Bay. With its symmetrical design including fo... 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
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
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Public domain photograph of electronic equipment, processor, control panel, technology, free to use, no copyright restrictions image - Picryl description Public domain photograph of electrical control panel, p... More
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Public domain photograph related to electrical equipment, industrial development, free to use, no copyright restrictions image - Picryl description
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Public domain photograph of electric industrial equipment, free to use, no copyright restrictions image - Picryl description
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Public domain photograph related to electrical equipment, industrial development, free to use, no copyright restrictions image - Picryl description
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Public domain photograph related to electrical equipment, industrial development, free to use, no copyright restrictions image - Picryl description
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Picryl description: Public domain image of a basement, underground, lobby, free to use, no copyright restrictions.
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Public domain photograph of electrical control panel, processor, free to use, no copyright restrictions image - Picryl description
Cape Canaveral Air Force Station, Launch Complex 39, Launch Control Ce...
Significance: The LCC was listed in the National Register of Historic Places (NRHP) on January 21, 2000. Originally nominated in the context of the Apollo Program, ca. 1961 through 1975, the LCC has since gaine... More
Cape Canaveral Air Force Station, Launch Complex 39, Launch Control Ce...
Significance: The LCC was listed in the National Register of Historic Places (NRHP) on January 21, 2000. Originally nominated in the context of the Apollo Program, ca. 1961 through 1975, the LCC has since gaine... More
Cape Canaveral Air Force Station, Launch Complex 39, Launch Control Ce...
Significance: The LCC was listed in the National Register of Historic Places (NRHP) on January 21, 2000. Originally nominated in the context of the Apollo Program, ca. 1961 through 1975, the LCC has since gaine... More
Cape Canaveral Air Force Station, Launch Complex 39, Launch Control Ce...
Significance: The LCC was listed in the National Register of Historic Places (NRHP) on January 21, 2000. Originally nominated in the context of the Apollo Program, ca. 1961 through 1975, the LCC has since gaine... More
Cape Canaveral Air Force Station, Launch Complex 39, Launch Control Ce...
Significance: The LCC was listed in the National Register of Historic Places (NRHP) on January 21, 2000. Originally nominated in the context of the Apollo Program, ca. 1961 through 1975, the LCC has since gaine... More
Jet Propulsion Laboratory Edwards Facility, Weigh & Control Building, ...
Unprocessed Field note material exists for this structure: N688 Survey number: HAER CA-163-N
Glenn L. Martin Company, Titan Missile Test Facilities, Control Buildi...
Significance: This blastproof enclosure enabled technicians to conduct and observe the captive firings at Test Stands D-3 and D-4. The Control Building also served as a training center for launch crews and as a... More
Whiteman Air Force Base, Oscar O-1 Minuteman Missile Alert Facility, S...
Significance: During the Cold War years, the Nation's nuclear arsenal included 1,000 Minuteman missiles. The Oscar-01 Missile Alert Facility (MAF) at Whiteman Air Force Base (AFB) was an integral part of that ... More
Whiteman Air Force Base, Oscar O-1 Minuteman Missile Alert Facility, S...
Significance: During the Cold War years, the Nation's nuclear arsenal included 1,000 Minuteman missiles. The Oscar-01 Missile Alert Facility (MAF) at Whiteman Air Force Base (AFB) was an integral part of that ... More
Whiteman Air Force Base, Oscar O-1 Minuteman Missile Alert Facility, S...
Significance: During the Cold War years, the Nation's nuclear arsenal included 1,000 Minuteman missiles. The Oscar-01 Missile Alert Facility (MAF) at Whiteman Air Force Base (AFB) was an integral part of that ... More
Whiteman Air Force Base, Oscar O-1 Minuteman Missile Alert Facility, S...
Significance: During the Cold War years, the Nation's nuclear arsenal included 1,000 Minuteman missiles. The Oscar-01 Missile Alert Facility (MAF) at Whiteman Air Force Base (AFB) was an integral part of that ... More
U.S. Steel Duquesne Works, West bank of Monongahela River along State ...
Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integrated steel producing ventures in the Monongahela Valley of western Pennsylvania. Constructed af... More
Hoover Dam, Los Angeles Relay Control Building, U.S. Highway 93, Bould...
Significance: It was a critical element of the Hoover Dam electrical generation and transmission system. Although it was associated by name with the Los Angeles Bureau of Power and Light 387.5/275 switchyard, t... More
Vandenberg Air Force Base, Space Launch Complex 3, Napa & Alden Roads,...
Significance: Space Launch Complex 3 (SLC-3) is one of the first operational installations in the United States military space program. The complex was constructed in 1959 to launch satellites into polar orbit... More
Vandenberg Air Force Base, Space Launch Complex 3, Napa & Alden Roads,...
Significance: Space Launch Complex 3 (SLC-3) is one of the first operational installations in the United States military space program. The complex was constructed in 1959 to launch satellites into polar orbit... More
Silver King Mining Company, Mineshaft & Main Hoist, Woodside Gulch, Pa...
Significance: The Silver King Mining Company became one of the major producers in the Park City district of Utah and attained a brief reputation as the richest silver mine in the known world. One of the smalle... More
Silver King Mining Company, Mineshaft & Main Hoist, Woodside Gulch, Pa...
Significance: The Silver King Mining Company became one of the major producers in the Park City district of Utah and attained a brief reputation as the richest silver mine in the known world. One of the smalle... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Tayco Street Bridge, Spanning Government Canal at Tayco & Water Street...
Significance: The Tayco Street Bridge is a double leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Menasha. With its symmetrical design and four hous... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Arlington Memorial Bridge, Spanning Potomac River between Lincoln Memo...
Significance: As the final link in the chain of monuments which start at the Capitol building, the Arlington Memorial Bridge connects the Mall in Washington, DC with Arlington National Cemetery in Virginia. De... More
Arlington Memorial Bridge, Spanning Potomac River between Lincoln Memo...
Significance: As the final link in the chain of monuments which start at the Capitol building, the Arlington Memorial Bridge connects the Mall in Washington, DC with Arlington National Cemetery in Virginia. De... More
Jet Propulsion Laboratory Edwards Facility, Control & Recording Center...
Unprocessed Field note material exists for this structure: N199 Survey number: HAER CA-163-J
Jet Propulsion Laboratory Edwards Facility, Control & Recording Center...
Unprocessed Field note material exists for this structure: N199 Survey number: HAER CA-163-J
Jet Propulsion Laboratory Edwards Facility, Control & Recording Center...
Unprocessed Field note material exists for this structure: N199 Survey number: HAER CA-163-J
New Haven Rail Yard, Interlocking Control Building, Vicinity of Union ...
Significance: The Interlocking Control Building is significant because its console, relays and other internal components represent an early use of centralized train control on a major railroad. The console mon... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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. 8, On Mississip...
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
Main Street Bridge, Spanning Fox River on Main Street, Green Bay, Brow...
Significance: The Main Street Bridge is a double-leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Green Bay. With its symmetrical design including fo... More
Main Street Bridge, Spanning Fox River on Main Street, Green Bay, Brow...
Significance: The Main Street Bridge is a double-leaf, Strauss Underneath Counterweight bascule bridge. It is significant as the only bridge of this type in Green Bay. With its symmetrical design including fo... 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