NASA Langley Research Center, 8-Foot Transonic Pressure Tunnel, 640 Th...
Significance: The 8-Foot Transonic Pressure Tunnel was the first of Langley's wind tunnels to be built incorporating the new slotted throat tunnel design from its inception. A significant improvement over its r... More
NASA Langley Research Center, 8-Foot Transonic Pressure Tunnel, 640 Th...
Significance: The 8-Foot Transonic Pressure Tunnel was the first of Langley's wind tunnels to be built incorporating the new slotted throat tunnel design from its inception. A significant improvement over its r... 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-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
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
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
USS Turner Joy, Bremerton Marina, Bremerton, Kitsap County, WA
Significance: USS Turner Joy is the last built of eighteen Forrest Sherman-class destroyers commissioned by the U.S. Navy between 1955 and 1959. Designed as an all-gun warship for anti-aircraft and anti-submar... 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
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
Haddam Neck Nuclear Power Plant, Service Building, 362 Injun Hollow Ro...
Public domain scan of architectural drawing, architecture, free to use, no copyright restrictions image - Picryl description
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
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
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
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 an office, table, bureau, desk, free to use, no copyright restrictions.
Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations B...
Public domain photograph - historical image of California, United States, 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...
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 electronic equipment, processor, control panel, technology, 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 - historical image of California, United States, free to use, no copyright restrictions image - Picryl description
CAPE CANAVERAL, Fla. – As seen on Google Maps, Firing Room 4 inside th...
CAPE CANAVERAL, Fla. – As seen on Google Maps, Firing Room 4 inside the Launch Control Center at NASA's Kennedy Space Center was one of the four control rooms used by NASA and contractor launch teams to oversee... More
Nevada Test Site - Control Point
Control Point, Nevada Test Site. The Department of Energy, Nevada Operations Office Test Controller and members of the Test Advisory Panel (at table) prepare to conduct Schellbourne, an underground nuclear tes... 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
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
NASA Langley Research Center, 8-Foot Transonic Pressure Tunnel, 640 Th...
Significance: The 8-Foot Transonic Pressure Tunnel was the first of Langley's wind tunnels to be built incorporating the new slotted throat tunnel design from its inception. A significant improvement over its r... More
NASA Langley Research Center, 8-Foot Transonic Pressure Tunnel, 640 Th...
Significance: The 8-Foot Transonic Pressure Tunnel was the first of Langley's wind tunnels to be built incorporating the new slotted throat tunnel design from its inception. A significant improvement over its r... 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
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
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
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
Haddam Neck Nuclear Power Plant, Service Building, 362 Injun Hollow Ro...
Public domain scan of an architecture diagram, architectural drawing, building plan, or design, free to use, no copyright restrictions - Picryl description.
NASA Johnson Space Center, Apollo Mission Control, 2101 NASA Parkway, ...
Public domain scan of architectural drawing, architecture, free to use, no copyright restrictions image - Picryl description
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
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
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