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2004 East Fourteenth Avenue (House), Tampa, Hillsborough County, FL

2004 East Fourteenth Avenue (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

Hughes Aircraft Company, 6775 Centinela Avenue, Los Angeles, Los Angeles County, CA

Hughes Aircraft Company, 6775 Centinela Avenue, Los Angeles, Los Angel...

Significance: Primarily developed between 1941 and 1953 and in continuous use to the present, the subject structures of the Hughes Aircraft Company, Culver City plant, constitute a unique and remarkably intact ... More

Baltimore & Ohio Railroad, Long Bridge, Keedysville, Washington County, MD

Baltimore & Ohio Railroad, Long Bridge, Keedysville, Washington County...

The B&O Railroad was authorized to abandon the bridge and the portion of the Hagerstown Branch on which the bridge was located in 1978. Significance: This bridge is one of the longest on the Baltimore and Ohio ... More

1701 East Fifteenth Avenue (House), Tampa, Hillsborough County, FL

1701 East Fifteenth Avenue (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

1701 East Fifteenth Avenue (House), Tampa, Hillsborough County, FL

1701 East Fifteenth Avenue (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

U.S. Naval Air Station, Assembly Hall, Radford Boulevard, Pensacola, Escambia County, FL

U.S. Naval Air Station, Assembly Hall, Radford Boulevard, Pensacola, E...

Significance: Building No. 1750 is a contributing building in the proposed Fort Barrancas Cantonment Historic District which has been determined eligible for listing on the National Register of Historic Places.... More

U.S. Naval Air Station, Assembly Hall, Radford Boulevard, Pensacola, Escambia County, FL

U.S. Naval Air Station, Assembly Hall, Radford Boulevard, Pensacola, E...

Significance: Building No. 1750 is a contributing building in the proposed Fort Barrancas Cantonment Historic District which has been determined eligible for listing on the National Register of Historic Places.... More

Cambria Iron Company, East side of Conemaugh River, Johnstown, Cambria County, PA

Cambria Iron Company, East side of Conemaugh River, Johnstown, Cambria...

Significance: The Cambria Ironworks is a part of a National Historic Landmark district recognized for its association with such renowned figures as John Fritz, Captain Bill Jones, Daniel J. Morrell, and William... More

Cambria Iron Company, East side of Conemaugh River, Johnstown, Cambria County, PA

Cambria Iron Company, East side of Conemaugh River, Johnstown, Cambria...

Significance: The Cambria Ironworks is a part of a National Historic Landmark district recognized for its association with such renowned figures as John Fritz, Captain Bill Jones, Daniel J. Morrell, and William... More

St. Elizabeths Hospital, Center Building, 539-559 Cedar Drive, Southeast, Washington, District of Columbia, DC

St. Elizabeths Hospital, Center Building, 539-559 Cedar Drive, Southea...

For an overview of the Center Building Group, see HABS DC-349-BT Significance: The Center Building (Buildings 1 and 2) is significant for its association with the treatment of mental illness at the St. Elizabet... More

Biggin Church (Ruins), Cooper River, West Branch, Moncks Corner, Berkeley County, SC

Biggin Church (Ruins), Cooper River, West Branch, Moncks Corner, Berke...

2017 Leicester B. Holland Prize, Entry Significance: Located just outside of Moncks Corner, South Carolina, are the ruins of Biggin Church. The church stands on a site elevated fifteen to twenty feet above the ... More

Fitzsimons General Hospital, Assembly Hall School, Northeast Corner of West McCloskey Avenue & North Tenth Street, Aurora, Adams County, CO

Fitzsimons General Hospital, Assembly Hall School, Northeast Corner of...

Survey number: HABS CO-172-AL Building/structure dates: 1919 Initial Construction

Fitzsimons General Hospital, Assembly Hall School, Northeast Corner of West McCloskey Avenue & North Tenth Street, Aurora, Adams County, CO

Fitzsimons General Hospital, Assembly Hall School, Northeast Corner of...

Survey number: HABS CO-172-AL Building/structure dates: 1919 Initial Construction

Fitzsimons General Hospital, Assembly Hall School, Northeast Corner of West McCloskey Avenue & North Tenth Street, Aurora, Adams County, CO

Fitzsimons General Hospital, Assembly Hall School, Northeast Corner of...

Survey number: HABS CO-172-AL Building/structure dates: 1919 Initial Construction

2008 East Fourteenth Avenue (House), Tampa, Hillsborough County, FL

2008 East Fourteenth Avenue (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

Picatinny Arsenal, 200 Area, Shell Component Loading, State Route 15 near I-80, Dover, Morris County, NJ

Picatinny Arsenal, 200 Area, Shell Component Loading, State Route 15 n...

Significance: Originally built as a depot for storage of powder and other armaments, during the 20th century Picatinny Arsenal became a leading facility for the research, development and production of munitions... More

Picatinny Arsenal, 200 Area, Shell Component Loading, State Route 15 near I-80, Dover, Morris County, NJ

Picatinny Arsenal, 200 Area, Shell Component Loading, State Route 15 n...

Significance: Originally built as a depot for storage of powder and other armaments, during the 20th century Picatinny Arsenal became a leading facility for the research, development and production of munitions... More

Picatinny Arsenal, 200 Area, Shell Component Loading, State Route 15 near I-80, Dover, Morris County, NJ

Picatinny Arsenal, 200 Area, Shell Component Loading, State Route 15 n...

Significance: Originally built as a depot for storage of powder and other armaments, during the 20th century Picatinny Arsenal became a leading facility for the research, development and production of munitions... More

1712 East Fourteenth Avenue (House), Tampa, Hillsborough County, FL

1712 East Fourteenth Avenue (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

1715 East Fifteenth Avenue (House), Tampa, Hillsborough County, FL

1715 East Fifteenth Avenue (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

United States Post Office Garage, 135 A Street (northeast corner A & West First Streets), South Boston, Suffolk County, MA

United States Post Office Garage, 135 A Street (northeast corner A & W...

Significance: Built in 1940-41 by the federal Public Buildings Administration, the United States Post Office Garage survives as a rare Boston-area of example of the International Style of architecture. This fu... More

United States Post Office Garage, 135 A Street (northeast corner A & West First Streets), South Boston, Suffolk County, MA

United States Post Office Garage, 135 A Street (northeast corner A & W...

Significance: Built in 1940-41 by the federal Public Buildings Administration, the United States Post Office Garage survives as a rare Boston-area of example of the International Style of architecture. This fu... More

1221 East Thirteenth Avenue (House), Tampa, Hillsborough County, FL

1221 East Thirteenth Avenue (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

Fort McCoy, Building No. T-1555, Intersection of South Tenth Avenue & South "J" Street, Sparta, Monroe County, WI

Fort McCoy, Building No. T-1555, Intersection of South Tenth Avenue & ...

Significance: Building T-1555 is an example of an 800 Series Type F-2 Fire Station. Though some modifications have been made over the years, the original form and materials are clearly distinguishable, and the... More

Frankford Arsenal, Building No. 227, South side of Hagner Road between Ripley & Mellon Streets, Philadelphia, Philadelphia County, PA

Frankford Arsenal, Building No. 227, South side of Hagner Road between...

Significance: Building 227, constructed in 1941 as a blank ammunition loading plant, is associated with the large-scale expansion of Frankford Arsenal, the United States' principal manufacturer of small arms am... More

Frankford Arsenal, Building No. 227, South side of Hagner Road between Ripley & Mellon Streets, Philadelphia, Philadelphia County, PA

Frankford Arsenal, Building No. 227, South side of Hagner Road between...

Significance: Building 227, constructed in 1941 as a blank ammunition loading plant, is associated with the large-scale expansion of Frankford Arsenal, the United States' principal manufacturer of small arms am... More

Sellwood Bridge, Spanning Willamette River at Southeast Tacoma Street, Portland, Multnomah County, OR

Sellwood Bridge, Spanning Willamette River at Southeast Tacoma Street,...

Significance: The Sellwood Bridge, the busiest two-lane bridge in Oregon, is the southern-most span in an ensemble of twelve monumental highway bridges across the lower Willamette River at Portland, Oregon. Th... More

Frankford Arsenal, Building No. 312, Northeast corner of Walbach Street & Monroe Road, Philadelphia, Philadelphia County, PA

Frankford Arsenal, Building No. 312, Northeast corner of Walbach Stree...

Significance: Building 312 is associated with the extensive infrastructure of roads, utilities and services that supported the principal functions of Frankford Arsenal, the U.S. Army's principal manufacturer of... More

General Dynamics Corporation Shipyard, Wellman-Seaver Crane, 97 Howard Street, Quincy, Norfolk County, MA

General Dynamics Corporation Shipyard, Wellman-Seaver Crane, 97 Howard...

Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P... More

General Dynamics Corporation Shipyard, Wellman-Seaver Crane, 97 Howard Street, Quincy, Norfolk County, MA

General Dynamics Corporation Shipyard, Wellman-Seaver Crane, 97 Howard...

Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P... More

NASA Industrial Plant, Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

NASA Industrial Plant, Maintenance Facility, 12214 Lakewood Boulevard,...

Significance: Building 10 appears to have been primarily used as a maintenance facility in all but its original function. The core structure was built in 1929 as part of the EMSCO aircraft manufacturing plant.... More

Raritan Arsenal, Warehouse N-5, 2890 Woodbridge Avenue, Bonhamtown, Middlesex County, NJ

Raritan Arsenal, Warehouse N-5, 2890 Woodbridge Avenue, Bonhamtown, Mi...

Significance: The Raritan Arsenal, originally known as the Raritan River Ordnance Base, was established in 1917 in preparation for the United States' entry into World War I. The Arsenal, initially a 2,150 acre ... More

Enterprise Manufacturing Company, 1450 Greene Street, Augusta Canal, Augusta, Richmond County, GA

Enterprise Manufacturing Company, 1450 Greene Street, Augusta Canal, A...

Significance: The Granite Mill, built shortly after the completion of the original canal, is the oldest industrial building in Augusta. The later Enterprise Manufacturing Company was the first large-scale mill... More

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsville, Fayette County, PA

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsvil...

Significance: The Hillman Barge facility is significant in the commercial and industrial development of southwestern Pennsylvania as a fabricator of shipping vessels. Beginning as a distribution facility for c... More

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsville, Fayette County, PA

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsvil...

Significance: The Hillman Barge facility is significant in the commercial and industrial development of southwestern Pennsylvania as a fabricator of shipping vessels. Beginning as a distribution facility for c... More

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsville, Fayette County, PA

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsvil...

Significance: The Hillman Barge facility is significant in the commercial and industrial development of southwestern Pennsylvania as a fabricator of shipping vessels. Beginning as a distribution facility for c... More

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsville, Fayette County, PA

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsvil...

Significance: The Hillman Barge facility is significant in the commercial and industrial development of southwestern Pennsylvania as a fabricator of shipping vessels. Beginning as a distribution facility for c... More

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsville, Fayette County, PA

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsvil...

Significance: The Hillman Barge facility is significant in the commercial and industrial development of southwestern Pennsylvania as a fabricator of shipping vessels. Beginning as a distribution facility for c... More

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsville, Fayette County, PA

Hillman Barge & Construction Company, Paul Thomas Boulevard, Brownsvil...

Significance: The Hillman Barge facility is significant in the commercial and industrial development of southwestern Pennsylvania as a fabricator of shipping vessels. Beginning as a distribution facility for c... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

Idaho National Engineering Laboratory, Test Area North, Scoville, Butt...

Significance: Test Area North (TAN) was a site of the Aircraft Nuclear Propulsion (ANP) Project of the U.S. Air Force and the Atomic Energy Commission. Its Cold War mission was to develop a turbojet bomber prop... More

Boston & Albany Railroad, Marion Street Bridge, Spanning Boston & Albany Railroad on Marion Street, Natick, Middlesex County, MA

Boston & Albany Railroad, Marion Street Bridge, Spanning Boston & Alba...

Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany ... More

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in t... More

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in t... More

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in t... More

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in t... More

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in t... More

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in t... More

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in t... More

Butte Mineyards, Stewart Mine, Intersection of Main & Woolman Streets, Butte, Silver Bow County, MT

Butte Mineyards, Stewart Mine, Intersection of Main & Woolman Streets,...

Significance: The Stewart represents one of Butte's oldest and most productive mines. It is historically significant for its association with William A. Clark and the Anaconda Copper Mining Company. The mine's ... More

2509 North Nineteenth Street (House), Tampa, Hillsborough County, FL

2509 North Nineteenth Street (House), Tampa, Hillsborough County, FL

Significance: This building's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built ... More

2501 North Thirteenth Street (House), 2501 North Thirteenth Street, Tampa, Hillsborough County, FL

2501 North Thirteenth Street (House), 2501 North Thirteenth Street, Ta...

Significance: It's architectural and historical significance is derived from its contribution to the Ybor City National Historic Landmark District. Ybor City is a section of Tampa founded and built by Vicente M... More

Hughes Aircraft Company, Mock-Up Building, 6775 Centinela Avenue, Los Angeles, Los Angeles County, CA

Hughes Aircraft Company, Mock-Up Building, 6775 Centinela Avenue, Los ...

Significance: Designs for Building 3 and associated Building 2 were developed by architect H.L. Gogerty even before the contract for the HK-1 Flying Boat was finalized. Construction of the building, to be used... More

Hughes Aircraft Company, Mock-Up Building, 6775 Centinela Avenue, Los Angeles, Los Angeles County, CA

Hughes Aircraft Company, Mock-Up Building, 6775 Centinela Avenue, Los ...

Significance: Designs for Building 3 and associated Building 2 were developed by architect H.L. Gogerty even before the contract for the HK-1 Flying Boat was finalized. Construction of the building, to be used... More

Waverley, Waverley Road, West Point, Clay County, MS

Waverley, Waverley Road, West Point, Clay County, MS

STORED OFF SITE AND ON SITE. mchr Significance: Begun in the 1840s and completed in 1852, Waverly is distinguished by the immense octagonal rotunda which projects through the roof as a cupola. This structure co... More

Waverley, Waverley Road, West Point, Clay County, MS

Waverley, Waverley Road, West Point, Clay County, MS

STORED OFF SITE AND ON SITE. mchr Significance: Begun in the 1840s and completed in 1852, Waverly is distinguished by the immense octagonal rotunda which projects through the roof as a cupola. This structure co... More

Waverley, Waverley Road, West Point, Clay County, MS

Waverley, Waverley Road, West Point, Clay County, MS

STORED OFF SITE AND ON SITE. mchr Significance: Begun in the 1840s and completed in 1852, Waverly is distinguished by the immense octagonal rotunda which projects through the roof as a cupola. This structure co... More

Georgetown Steam Plant, South Warsaw Street, King County Airport, Seattle, King County, WA

Georgetown Steam Plant, South Warsaw Street, King County Airport, Seat...

Significance: The Georgetown Steam Plant is an early reinforced concrete structure housing America's last operable examples of the "first generation" of large scale, vertical steam turbine electric generators. ... More

Georgetown Steam Plant, South Warsaw Street, King County Airport, Seattle, King County, WA

Georgetown Steam Plant, South Warsaw Street, King County Airport, Seat...

Significance: The Georgetown Steam Plant is an early reinforced concrete structure housing America's last operable examples of the "first generation" of large scale, vertical steam turbine electric generators. ... More

Georgetown Steam Plant, South Warsaw Street, King County Airport, Seattle, King County, WA

Georgetown Steam Plant, South Warsaw Street, King County Airport, Seat...

Significance: The Georgetown Steam Plant is an early reinforced concrete structure housing America's last operable examples of the "first generation" of large scale, vertical steam turbine electric generators. ... More

Bostwick Hall, 3901 Forty-eighth Street, Bladensburg, Prince George's County, MD

Bostwick Hall, 3901 Forty-eighth Street, Bladensburg, Prince George's ...

Significance: Bostwick is one of the first, and one of the few extant, structures built in Bladensburg upon its founding in 1742. Only four pre-Revolutionary War buildings now stand. Although altered over the... More

Bostwick Hall, 3901 Forty-eighth Street, Bladensburg, Prince George's County, MD

Bostwick Hall, 3901 Forty-eighth Street, Bladensburg, Prince George's ...

Significance: Bostwick is one of the first, and one of the few extant, structures built in Bladensburg upon its founding in 1742. Only four pre-Revolutionary War buildings now stand. Although altered over the... More

Bostwick Hall, 3901 Forty-eighth Street, Bladensburg, Prince George's County, MD

Bostwick Hall, 3901 Forty-eighth Street, Bladensburg, Prince George's ...

Significance: Bostwick is one of the first, and one of the few extant, structures built in Bladensburg upon its founding in 1742. Only four pre-Revolutionary War buildings now stand. Although altered over the... More

Pawtucket Canal, Pawtucket Falls vicinity, Lowell, Middlesex County, MA

Pawtucket Canal, Pawtucket Falls vicinity, Lowell, Middlesex County, M...

Significance: Originally constructed to facilitate the transporting of goods from inland New England to the sea at Newburyport, the Pawtucket Canal was later used as the basis for the extensive power canal syst... More

Raritan Arsenal, 2890 Woodbridge Avenue, Bonhamtown, Middlesex County, NJ

Raritan Arsenal, 2890 Woodbridge Avenue, Bonhamtown, Middlesex County,...

Significance: The Raritan Arsenal, originally known as the Raritan River Ordnance Base, was established in 1917 in preparation for the United States' entry into World War I. The Arsenal, initially a 2,150 acre ... More

U.S. Naval Base, Pearl Harbor, Naval Housing Area Makalapa, Junior Officers' Quarters Type K, Makin Place, & Halawa, Makalapa, & Midway Drives, Pearl City, Honolulu County, HI

U.S. Naval Base, Pearl Harbor, Naval Housing Area Makalapa, Junior Off...

Significance: This housing type is significant as an example of Hawaiian residential architecture during the 1940s, in a grouping of related types. The design is notable for the use of new materials and minima... More

Peerless Motor Car Company, East Ninety-third Street & Quincy Avenue, Cleveland, Cuyahoga County, OH

Peerless Motor Car Company, East Ninety-third Street & Quincy Avenue, ...

Significance: Factory foreshadowed the best in modern architectural trends; manufacturing methods outdated. Illustrates the large role that industrial buildings and processes played in the decline of the Cleve... More

Peerless Motor Car Company, East Ninety-third Street & Quincy Avenue, Cleveland, Cuyahoga County, OH

Peerless Motor Car Company, East Ninety-third Street & Quincy Avenue, ...

Significance: Factory foreshadowed the best in modern architectural trends; manufacturing methods outdated. Illustrates the large role that industrial buildings and processes played in the decline of the Cleve... More

McPherson's Ford Bridge, State Route 633 over Cowpasture River, Clifton Forge, Alleghany County, Virginia

McPherson's Ford Bridge, State Route 633 over Cowpasture River, Clifto...

Significance: The McPherson's Ford Bridge is a representative example of a pin-connected steel Pratt through truss, typical of late nineteenth century factory manufactured bridges. Survey number: HAER VA-104 ... More

McPherson's Ford Bridge, State Route 633 over Cowpasture River, Clifton Forge, Alleghany County, Virginia

McPherson's Ford Bridge, State Route 633 over Cowpasture River, Clifto...

Significance: The McPherson's Ford Bridge is a representative example of a pin-connected steel Pratt through truss, typical of late nineteenth century factory manufactured bridges. Survey number: HAER VA-104 ... More

Buffalo Gas Light Company, 249 West Genesee Street, Buffalo, Erie County, NY

Buffalo Gas Light Company, 249 West Genesee Street, Buffalo, Erie Coun...

Significance: The Buffalo Gas Light Company began the manufacture of illuminating gas from coal in horizontal retorts in 1848. At that time the designated lamp district in the city contained 179 lights with fa... More

Manchester Street Bridge, Spanning Baraboo River on Manchester Street, Baraboo, Sauk County, WI

Manchester Street Bridge, Spanning Baraboo River on Manchester Street,...

Significance: The Manchester Street Bridge is a Camelback (Pratt) through truss. It was erected in 1884 by the Milwaukee Bridge and Iron Works, a very prolific late nineteenth century firm that built bridges t... More

Manchester Street Bridge, Spanning Baraboo River on Manchester Street, Baraboo, Sauk County, WI

Manchester Street Bridge, Spanning Baraboo River on Manchester Street,...

Significance: The Manchester Street Bridge is a Camelback (Pratt) through truss. It was erected in 1884 by the Milwaukee Bridge and Iron Works, a very prolific late nineteenth century firm that built bridges t... More

Salem Manufacturing Company, Arista Cotton Mill, Brookstown & Marshall Streets, Winston-Salem, Forsyth County, NC

Salem Manufacturing Company, Arista Cotton Mill, Brookstown & Marshall...

Significance: The Arista Mill complex is the oldest physical reminder of three forgotten elements in the history of Winston-Salem: Although the development and reputation of this city has been dominated by toba... More

Salem Manufacturing Company, Arista Cotton Mill, Brookstown & Marshall Streets, Winston-Salem, Forsyth County, NC

Salem Manufacturing Company, Arista Cotton Mill, Brookstown & Marshall...

Significance: The Arista Mill complex is the oldest physical reminder of three forgotten elements in the history of Winston-Salem: Although the development and reputation of this city has been dominated by toba... More

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