U.S. Naval Base, Pearl Harbor, Hangar 6, South End of Ford Island, Pea...
Significance: Hangar 6 is believed to be the oldest aircraft hangar in Hawaii. It played an unglamorous but significant role in the development of naval aviation in the Pacific and in the World War II offensiv... More
U.S. Naval Base, Pearl Harbor, Hangar 6, South End of Ford Island, Pea...
Significance: Hangar 6 is believed to be the oldest aircraft hangar in Hawaii. It played an unglamorous but significant role in the development of naval aviation in the Pacific and in the World War II offensiv... More
Niantic River Swing Bridge, Spanning Niantic River between East Lyme &...
Significance: The Niantic River Bridge has two spans: a fixed Pratt through truss and the swing span which resembles a Warren through truss with verticals. All members and all connections are riveted. Survey ... More
Niantic River Swing Bridge, Spanning Niantic River between East Lyme &...
Significance: The Niantic River Bridge has two spans: a fixed Pratt through truss and the swing span which resembles a Warren through truss with verticals. All members and all connections are riveted. Survey ... More
Niantic River Swing Bridge, Spanning Niantic River between East Lyme &...
Significance: The Niantic River Bridge has two spans: a fixed Pratt through truss and the swing span which resembles a Warren through truss with verticals. All members and all connections are riveted. Survey ... More
Fort MacArthur, Raw Salt Storage & Processing Buildings, Pacific Avenu...
Significance: The Trona Plant (Building 425) at Fort MacArthur is one of the largest remaining wood timber buildings in southern California. As such, it represents an impressive example of an early west coast ... More
Fort MacArthur, Raw Salt Storage & Processing Buildings, Pacific Avenu...
Significance: The Trona Plant (Building 425) at Fort MacArthur is one of the largest remaining wood timber buildings in southern California. As such, it represents an impressive example of an early west coast ... More
Baltimore & Ohio Railroad, Tobacco Warehouse, 1000-1001 Fell Street, B...
Significance: The B & O Railroad Tobacco Warehouse was a collection point for southern tidewater tobacco. Before being shipped to European markets, tobacco was graded, sorted and packed into hogshead barrels i... More
Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislativ...
Significance: The existing Emlenton Bridge is significant in the areas of engineering and transportation, specifically for its age, size, type of truss, length of truss for this age, and material. The bridge w... More
Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislativ...
Significance: The existing Emlenton Bridge is significant in the areas of engineering and transportation, specifically for its age, size, type of truss, length of truss for this age, and material. The bridge w... More
Baltimore & Ohio Railroad, Mount Royal Trainshed, 1400 Cathedral Stree...
Significance: When it opened in 1896, the Mount Royal Station and Trainshed was one of the best examples of the harmonious blending of engineering and aesthetic values in an urban environment. Sited at the nor... More
Washingtonville Bridge, Pennsylvania Legislative Route 47036, spanning...
Significance: The Washingtonville Bridge is a small span Pratt pony truss, fabricated by the Phoenix Bridge Company for the New York firm of Dean & Westbrook. It is a typical example, although a rare survivor,... More
Shooters Island, Ships Graveyard, Newark Bay, Staten Island (subdivisi...
Significance: Shooters Island was one of five major ship graveyards in the Greater New York Harbor. From the mid-nineteenth century through 1922, the island was used for small scale industrial and shipbuilding... More
American Woolen Company, East Canal Street, Winooski, Chittenden Count...
Significance: The Champlain Mill is a good representative example of late nineteenth century New England mill architecture. The structure is a four-story brick building, with slightly arched windows and corbel... More
Bailey Island Bridge, Bailey Island, Cumberland County, ME
Significance: This is an unusual stone bridge built in the early 20th century to provide passage over a tidal inlet. The form of stone cribwork was chosen so that water could pass through the structure in resp... More
Smithton Bridge, Spanning Youghiogheny River on State Road 981, Smitht...
Significance: The Smithton Bridge is the oldest remaining cantilever truss highway bridge in Pennsylvania. It is a typical example of the suspended span cantilever truss that was being built in the United Stat... More
Rehoboth Avenue Bridge, State Route 1A (Rehoboth Avenue) over Lewes & ...
Significance: A notable example of a Scherzer rolling lift bascule bridge and a typical example of 1920's bridge architecture. It is the second oldest bascule bridge in Delaware, out of the eleven that are sti... More
Hegeman-Hill Street Bridge, Spanning Batten Kill, .65 mile West of Gre...
Significance: The Hegeman-Hill Street Bridge, while a common design of its time (pin connected-type Baltimore truss), was constructed by the Owego Bridge company, founded by Ellery Colby, a bridge builder in Ne... More
Hegeman-Hill Street Bridge, Spanning Batten Kill, .65 mile West of Gre...
Significance: The Hegeman-Hill Street Bridge, while a common design of its time (pin connected-type Baltimore truss), was constructed by the Owego Bridge company, founded by Ellery Colby, a bridge builder in Ne... More
Kaibab Trail Suspension Bridge, Spanning Colorado River, Grand Canyon,...
Significance: This is the site of the first bridge crossing of the Colorado River within the Grand Canyon National Park. It comprises an excellent example of an early 20th century suspension bridge designed fo... More
Kaibab Trail Suspension Bridge, Spanning Colorado River, Grand Canyon,...
Significance: This is the site of the first bridge crossing of the Colorado River within the Grand Canyon National Park. It comprises an excellent example of an early 20th century suspension bridge designed fo... More
Gianella Bridge, Spanning Sacramento River at State Highway 32, Hamilt...
Significance: The Gianella Bridge is the oldest remaining highway swing bridge in California. It is important in local history for its relation to events in local economic and agricultural development. It is ... More
Gianella Bridge, Spanning Sacramento River at State Highway 32, Hamilt...
Significance: The Gianella Bridge is the oldest remaining highway swing bridge in California. It is important in local history for its relation to events in local economic and agricultural development. It is ... More
Gianella Bridge, Spanning Sacramento River at State Highway 32, Hamilt...
Significance: The Gianella Bridge is the oldest remaining highway swing bridge in California. It is important in local history for its relation to events in local economic and agricultural development. It is ... More
Gianella Bridge, Spanning Sacramento River at State Highway 32, Hamilt...
Significance: The Gianella Bridge is the oldest remaining highway swing bridge in California. It is important in local history for its relation to events in local economic and agricultural development. It is ... More
Sperry Corn Elevator Complex, Weber Avenue (North side), West of Ediso...
Significance: The Sperry Corn Elevator Complex is a reminder of the great Sperry milling enterprises. Not constructed until 1920, the elevator played a distinct role in the Sperry operations and, more importan... More
Bridge Street Bridge, Spanning Little French Creek at Bridge Street, U...
Significance: The Bridge Street Bridge over Little French Creek in Union City is a Through Pratt Truss metal bridge. It crosses Little French Creek immediately below a dam and mill pond that provided water po... More
Wailoa Bridge, Spanning Wailoa River at Kamehameha Avenue, Hilo, Hawai...
Significance: Wailoa Bridge and Kamehameha Avenue originally served as the main traffic artery connecting Wainaku Sugar Mill and Kuhio Wharf. Presently, it serves as a major transportation link between Hilo an... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
Kennecott Copper Corporation, On Copper River & Northwestern Railroad,...
Significance: Kennecott's significance lies in its quality, as well as quantity, of high grade ore. The mine also illustrates the history of world and U.S. copper between 1907 and 1938. The rise and decline o... More
St. Anthony Street Bridge, Spanning Buffalo Creek, Legislative Route 5...
Significance: The St. Anthony Street Bridge is significant in the areas of engineering and transportation, specifically for its age, size, length of truss for this age, and builder. The Champion Bridge Company... More
Harvard Bridge, Spanning Charles River at Massachusetts Avenue, Boston...
Significance: The Harvard Bridge is located in the Charles River Basin Historic District. Survey number: HAER MA-53 Building/structure dates: 1887- 1891 Initial Construction Building/structure dates: 1898... More
Harvard Bridge, Spanning Charles River at Massachusetts Avenue, Boston...
Significance: The Harvard Bridge is located in the Charles River Basin Historic District. Survey number: HAER MA-53 Building/structure dates: 1887- 1891 Initial Construction Building/structure dates: 1898... More
Harvard Bridge, Spanning Charles River at Massachusetts Avenue, Boston...
Significance: The Harvard Bridge is located in the Charles River Basin Historic District. Survey number: HAER MA-53 Building/structure dates: 1887- 1891 Initial Construction Building/structure dates: 1898... More
Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown...
Significance: The Sharptown Bridge was the first bridge built entirely under the control of the State Roads Commission. It is the first and only bridge at this location. Survey number: HAER MD-52 Building/st... More
Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown...
Significance: The Sharptown Bridge was the first bridge built entirely under the control of the State Roads Commission. It is the first and only bridge at this location. Survey number: HAER MD-52 Building/st... More
Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown...
Significance: The Sharptown Bridge was the first bridge built entirely under the control of the State Roads Commission. It is the first and only bridge at this location. Survey number: HAER MD-52 Building/st... More
Sunrise Mine, Hall, Granite County, MT
Significance: The property was one of the more successful and longest operating of the dozen or so gold mills established in Granite County. It made significant contribution to the economic and social developme... More
Bidwell Bar Suspension Bridge & Stone Toll House, Near Lake Oroville (...
Significance: This structure is the only surviving suspension bridge in the American West dating to the mid 19th century. When reconstructed over Lake Oroville, it was "strengthened" with pile supports under t... More
Smith Avenue High Bridge, Smith Avenue between Cherokee Avenue & Cliff...
Significance: The Smith Avenue High Bridge, a nineteenth century wrought iron Warren deck truss, is the longest and highest roadway truss bridge in Minnesota. It was designed by Keystone Bridge Co. of Pittsbur... More
Smith Avenue High Bridge, Smith Avenue between Cherokee Avenue & Cliff...
Significance: The Smith Avenue High Bridge, a nineteenth century wrought iron Warren deck truss, is the longest and highest roadway truss bridge in Minnesota. It was designed by Keystone Bridge Co. of Pittsbur... More
Hacienda Azurarera Santa Elena, Sugar Mill Ruins, 1.44 miles North of ...
Significance: The ruins are the only extant remains pertaining to an industrial building in Puerto Rico dating back to the late 18th century. They illustrate the transition from a cattle-driven vertical wooden... More
Broadway Bridge, Spanning Mississippi River at Broadway Street, Minnea...
Significance: The Broadway Bridge was a four-span, wrought iron and steel, high through Pratt truss and was one of two known remaining decorative truss bridges in Minnesota. The bridge was fabricated by the Ki... More
Broadway Bridge, Spanning Mississippi River at Broadway Street, Minnea...
Significance: The Broadway Bridge was a four-span, wrought iron and steel, high through Pratt truss and was one of two known remaining decorative truss bridges in Minnesota. The bridge was fabricated by the Ki... More
Broadway Bridge, Spanning Mississippi River at Broadway Street, Minnea...
Significance: The Broadway Bridge was a four-span, wrought iron and steel, high through Pratt truss and was one of two known remaining decorative truss bridges in Minnesota. The bridge was fabricated by the Ki... More
Broadway Bridge, Spanning Mississippi River at Broadway Street, Minnea...
Significance: The Broadway Bridge was a four-span, wrought iron and steel, high through Pratt truss and was one of two known remaining decorative truss bridges in Minnesota. The bridge was fabricated by the Ki... More
Broadway Bridge, Spanning Mississippi River at Broadway Street, Minnea...
Significance: The Broadway Bridge was a four-span, wrought iron and steel, high through Pratt truss and was one of two known remaining decorative truss bridges in Minnesota. The bridge was fabricated by the Ki... More
Copper River & Northwestern Railroad, Gilahina Bridge, Mile 28.5, McCa...
Significance: Part of the Copper River and Northwestern Railway route, this bridge illustrates the ingenuity and drive of the railroad builders. Built during the winter of 1911 in only eleven days, this 180 fo... More
Honesdale Coal Pockets, Main & Commercial Streets, between 700 & 800 b...
Significance: Although determined not to be part of the early gravity railroad and canal system, this deteriorating coal pocket structure belongs to a family of rapidly disappearing coal and railroad structures... More
Truckee-Carson Irrigation District Facility Yard, Car Repair Shop, Six...
Significance: The building is a fine example of period vernacular architecture. / The building first appears on a 1953 map of the TCID; however, it is situated on the site of the grease rack shown on the 1937 C... More
East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Rou...
Significance: The existing East Bloomsburg Bridge consists of six equal pin-connected through-truss spans of 190 foot length with two feet between end bearings at the piers for a total length of 1150 feet. The... More
East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Rou...
Significance: The existing East Bloomsburg Bridge consists of six equal pin-connected through-truss spans of 190 foot length with two feet between end bearings at the piers for a total length of 1150 feet. The... More
East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Rou...
Significance: The existing East Bloomsburg Bridge consists of six equal pin-connected through-truss spans of 190 foot length with two feet between end bearings at the piers for a total length of 1150 feet. The... More
Hamilton Street Dam, Lehigh River upstream of Hamilton Street Bridge, ...
Significance: The Hamilton Street Dam is an integral part of the Lehigh Canal, which was of major economic importance in the development of industry in the Lehigh Valley in the nineteenth century. The V-shaped... More
Hamilton Street Dam, Lehigh River upstream of Hamilton Street Bridge, ...
Significance: The Hamilton Street Dam is an integral part of the Lehigh Canal, which was of major economic importance in the development of industry in the Lehigh Valley in the nineteenth century. The V-shaped... More
College Avenue Bridge, Pennsylvania Route 58/ Legislative Route 82 spa...
Significance: The College Avenue Bridge in Greenville, Pennsylvania, is a simple pony truss bridge that spans the Little Shenango River on the northern side of Greenville, providing access to the Shenango Valle... More
Haralson County Bridge, County Road 189, spanning Tallapoosa River, Ta...
Significance: The Haralson County Bridge is a steel pin connected Pratt-through truss constructed by the Virginia Bridge and Iron Company of Roanoke, Virginia. The bridge is composed of one Pratt-through truss... More
North Carolina Route 1417 Bridge, Spanning Dan River, Danbury, Stokes ...
Significance: This Pratt Pony truss bridge spans a narrow gorge of the Dan River. Its builder, the Virginia Bridge and Iron Company, combined the following details into its bridges: threaded pins, laced vertic... More
Baltimore & Ohio Railroad, Howard Street Tunnel, 1300 Mount Royal Aven...
Significance: The Baltimore Belt Railroad, chartered in 1888, built the Howard Street Tunnel. The seven-mile-long railroad connected the main branch of the Baltimore and Ohio Railroad that extends westward wit... More
Hartford & New Haven Railroad, Depot, 35 Central Street, Windsor, Hart...
Significance: This mid 19th century railroad building with exceptionally rich detail is one of the finest examples of the French Second Empire Style in Windsor. Windsor Center experienced a major residential d... More
Hartford & New Haven Railroad, Depot, 35 Central Street, Windsor, Hart...
Significance: This mid 19th century railroad building with exceptionally rich detail is one of the finest examples of the French Second Empire Style in Windsor. Windsor Center experienced a major residential d... More
Green Butte Copper Company, Warehouse, McCarthy Creek 12 miles Northea...
Significance: Used by the Green Butte Copper Company between 1921 and 1926 as part of their mining operation. The 18' x 20', rectangular building is constructed of logs. Survey number: HAER AK-9-G Building/s... More
Kentucky Route 49 Bridge, Spanning Rolling Fork River, Bradfordsville,...
Significance: In January 1982, there were six Whipple-Murphy trusses in the State. The Kentucky Route 49 Bridge is the oldest Whipple-Murphy bridge in Kentucky. Survey number: HAER KY-17 Building/structure d... More
Bayou Teche Bridge, Spanning Bayou Teche, Ruth, St. Martin Parish, LA
Significance: Bayou Teche Bridge is the oldest existing steel I-beam swing span in Louisiana. This bridge is 246 feet long and 15 feet wide. A hand-operated, equal arm swing span bridge, it was designed for a... More
Bayou Teche Bridge, Spanning Bayou Teche, Ruth, St. Martin Parish, LA
Significance: Bayou Teche Bridge is the oldest existing steel I-beam swing span in Louisiana. This bridge is 246 feet long and 15 feet wide. A hand-operated, equal arm swing span bridge, it was designed for a... More
Rock Creek Mining District, Upper, Lower & Waterman Ditches, Near inte...
Significance: The hydraulicking ditches of the Rock Creek Mining District are early representatives of a hydraulic mining process invented in California in 1852. The ditches preserve an early localized impleme... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Christiana Borough Bridge, Bridge Street over Pennsylvania Railroad, C...
Significance: The Christiana Borough Bridge is a rare survivor of the Whipple truss bridge structure with wrought iron Phoenix columns. Built in 1893-95 by the Pennsylvania Railroad during a period of railroad... More
Lovejoy Bridge, Andover, Oxford County, ME
Significance: This is a well-preserved example of the Paddleford truss used for covered bridge construction. It retains a high degree of historic integrity. Survey number: HAER ME-4 Building/structure dates:... More
Lovejoy Bridge, Andover, Oxford County, ME
Significance: This is a well-preserved example of the Paddleford truss used for covered bridge construction. It retains a high degree of historic integrity. Survey number: HAER ME-4 Building/structure dates:... More
Union Iron Works Turbine Machine Shop, 2200 Webster Street, Alameda, A...
Significance: The Union Iron Works Turbine Machine Shop building is both historically and architecturally significant. As the nucleus of a major West Coast shipyard which made important contributions to ship b... More
Indiana Central Canal, Indianapolis Division, Parallel to West Street,...
Significance: The Indianapolis Division of the Indiana Central Canal is possibly the oldest remaining man-made structure or facility in Indianapolis-Marion County. The canal is listed on the Indiana State Regi... More
Lockville Hydroelectric Plant, Deep River, 3.5 miles upstream from Haw...
Significance: The Lockville dam, canal, and powerhouse occupy a site which is closely associated with important events in the history of Chatham County and in the overall development of North Carolina. Lord Co... More
Endion Passenger Depot, 1504 South Street, Duluth, St. Louis County, M...
Significance: The Endion Depot is significant as the last of the small passenger depots to function in Duluth. Its jewel-like character results from the fine use of stone and brick architectural detailing and ... More
Endion Passenger Depot, 1504 South Street, Duluth, St. Louis County, M...
Significance: The Endion Depot is significant as the last of the small passenger depots to function in Duluth. Its jewel-like character results from the fine use of stone and brick architectural detailing and ... More