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
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
Cohoes Company, Gate House No. 1, On Mohawk River, North end of Canal ...
Significance: In addition to its practical function as a gate house controlling the flow of water to the canal, the head gate house was conceived romantically as a Romanesque Revival, brick bastion at the head ... More
Cohoes Company, Gate House No. 1, On Mohawk River, North end of Canal ...
Significance: In addition to its practical function as a gate house controlling the flow of water to the canal, the head gate house was conceived romantically as a Romanesque Revival, brick bastion at the head ... More
North Carolina Route 1412 Bridge, Spanning Leepers Creek, Laboratory, ...
Significance: It is the earliest bridge to contain rolled sections in its truss system. The span is 120' and divided into seven panels. It contains the characteristic bolted pins of the Owego Company, builder... More
North Carolina Route 1412 Bridge, Spanning Leepers Creek, Laboratory, ...
Significance: It is the earliest bridge to contain rolled sections in its truss system. The span is 120' and divided into seven panels. It contains the characteristic bolted pins of the Owego Company, builder... More
Erie-Lackawanna Railroad, Tunkhannock Viaduct, Nicholson, Wyoming Coun...
Significance: When the Lackawanna Railroad's 39.6-mile Clarks Summit-Halstead Cutoff in northeastern Pennsylvania was dedicated on Saturday, November 6, 1915, the 2,375-foot-long, 240-foot-high Tunkhannock Viad... More
Erie-Lackawanna Railroad, Tunkhannock Viaduct, Nicholson, Wyoming Coun...
Significance: When the Lackawanna Railroad's 39.6-mile Clarks Summit-Halstead Cutoff in northeastern Pennsylvania was dedicated on Saturday, November 6, 1915, the 2,375-foot-long, 240-foot-high Tunkhannock Viad... More
Orote Point Airfield, Apra Harbor Naval Reservation, Agat, Guam, GU
Site associated with the Battle of the Philippine Sea & "Operation New Life." Significance: Orote Airfield was the first airfield in Guam, a pioneering effort in military aviation in the western Pacific. It pl... More
Orote Point Airfield, Apra Harbor Naval Reservation, Agat, Guam, GU
Site associated with the Battle of the Philippine Sea & "Operation New Life." Significance: Orote Airfield was the first airfield in Guam, a pioneering effort in military aviation in the western Pacific. It pl... More
Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...
Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More
Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...
Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More
Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...
Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More
Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...
Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More
Lover's Leap Lenticular Bridge, Spanning Housatonic River on Pumpkin H...
Significance: The structure is 19 feet wide and 173 feet long. It is the most recently built lenticular through truss surviving in Connecticut, as of 1984. It has been replaced by a new bridge built several y... More
Pittsburgh & Steubenville Extension Railroad Tunnel, Between Fifth & S...
Significance: The Pittsburgh and Steubenville Extension Railroad Tunnel was a section of the Pittsburgh rail link between the Pennsylvania Railroad's western terminus and the eastern terminus of the Steubenvill... More
Pittsburgh & Steubenville Extension Railroad Tunnel, Between Fifth & S...
Significance: The Pittsburgh and Steubenville Extension Railroad Tunnel was a section of the Pittsburgh rail link between the Pennsylvania Railroad's western terminus and the eastern terminus of the Steubenvill... More
Woodville Canal Company, West side of Snake River (River Mile 796), Wo...
Significance: The Woodville Canal Company represents one of the few remaining small-scale canal companies operating in eastern Idaho that continues to be administered and managed by district farmers. The Woodv... More
Bartlett-Hayward Industrial Complex, 200 Scott Street, Baltimore, Inde...
Significance: Bartlett-Hayward was an important Baltimore manufacturer during the nineteenth and early twentieth centuries. It was particularly noted as a producer of decorative architectural ironwork. The Sc... More
Bartlett-Hayward Industrial Complex, 200 Scott Street, Baltimore, Inde...
Significance: Bartlett-Hayward was an important Baltimore manufacturer during the nineteenth and early twentieth centuries. It was particularly noted as a producer of decorative architectural ironwork. The Sc... More
Lefferts Tide Mill, Huntington Harbor, Southdown Road, Huntington, Suf...
Significance: The Lefferts Mill is a fine example of a tide mill, a relatively rare engineering structure. It is also important as an example of a typical Long Island water-powered grist mill in its equipment,... More
Pennsylvania Railroad, Harrisburg Station & Trainshed, Market & South ...
Significance: When this train station was constructed, Harrisburg was a major railroad center, located at the foot of the Allegheny Mountains. The train sheds are particularly significant. When constructed, t... More
Pennsylvania Railroad, Harrisburg Station & Trainshed, Market & South ...
Significance: When this train station was constructed, Harrisburg was a major railroad center, located at the foot of the Allegheny Mountains. The train sheds are particularly significant. When constructed, t... More
Fitger Brewery Complex, Stable & Garage, 600 East Superior Street, Dul...
Significance: The stable and garage building was constructed in 1911 by McLeod & Smith for an original cost of $24,000. The architect was Mr. L. Lehle. The building was constructed where a previous barn and s... More
Shooters Island, Ships Graveyard, Vessel No. 37, Newark Bay, Staten Is...
Significance: Vessel Number 37 is a relatively well-preserved covered barge with living quarters for the operators of the barge, a stove cage for heating and ice boxes for cooling the protected cargo. This ves... More
Shooters Island, Ships Graveyard, Vessel No. 37, Newark Bay, Staten Is...
Significance: Vessel Number 37 is a relatively well-preserved covered barge with living quarters for the operators of the barge, a stove cage for heating and ice boxes for cooling the protected cargo. This ves... More
Driving Park Avenue Bridge, Spanning Genesee River Gorge, Rochester, M...
Significance: The Driving Park Avenue Bridge was constructed in two years, from 1889 to 1890, by the Rochester Bridge and Iron Works, based on design plans by Leffert L. Buck. The bridge is 717 feet long, span... More
Golden Gate Bridge, Spanning mouth of San Francisco Bay, San Francisco...
Significance: Spanning one of the World's most spectacular channels, the Golden Gate Bridge is internationally renowned as a superb structural and aesthetic example of suspension bridge design. Survey number: ... More
Golden Gate Bridge, Spanning mouth of San Francisco Bay, San Francisco...
Significance: Spanning one of the World's most spectacular channels, the Golden Gate Bridge is internationally renowned as a superb structural and aesthetic example of suspension bridge design. Survey number: ... More
Golden Gate Bridge, Spanning mouth of San Francisco Bay, San Francisco...
Significance: Spanning one of the World's most spectacular channels, the Golden Gate Bridge is internationally renowned as a superb structural and aesthetic example of suspension bridge design. Survey number: ... More
Golden Gate Bridge, Spanning mouth of San Francisco Bay, San Francisco...
Significance: Spanning one of the World's most spectacular channels, the Golden Gate Bridge is internationally renowned as a superb structural and aesthetic example of suspension bridge design. Survey number: ... More
Golden Gate Bridge, Spanning mouth of San Francisco Bay, San Francisco...
Significance: Spanning one of the World's most spectacular channels, the Golden Gate Bridge is internationally renowned as a superb structural and aesthetic example of suspension bridge design. Survey number: ... More
Golden Gate Bridge, Spanning mouth of San Francisco Bay, San Francisco...
Significance: Spanning one of the World's most spectacular channels, the Golden Gate Bridge is internationally renowned as a superb structural and aesthetic example of suspension bridge design. Survey number: ... More
Golden Gate Bridge, Spanning mouth of San Francisco Bay, San Francisco...
Significance: Spanning one of the World's most spectacular channels, the Golden Gate Bridge is internationally renowned as a superb structural and aesthetic example of suspension bridge design. Survey number: ... More
Roosevelt Power Canal & Diversion Dam, Parallels Salt River, Roosevelt...
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili... More
Roosevelt Power Canal & Diversion Dam, Parallels Salt River, Roosevelt...
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili... More
Roosevelt Power Canal & Diversion Dam, Parallels Salt River, Roosevelt...
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili... More
Roosevelt Power Canal & Diversion Dam, Parallels Salt River, Roosevelt...
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili... More
Roosevelt Power Canal & Diversion Dam, Parallels Salt River, Roosevelt...
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili... More
Roosevelt Power Canal & Diversion Dam, Parallels Salt River, Roosevelt...
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili... More
Bailey's Dam, Red River, Alexandria, Rapides Parish, LA
Significance: This 100-year-old dam is significant in that there has been no development in the area since the 1860s. Survey number: HAER LA-6 Building/structure dates: 1864 Initial Construction
Second Avenue Bridge, Spanning Oostanaula on State Route 101 (Second A...
Significance: The Second Avenue Bridge is a rivet-connected Camelback through truss. It is composed of two steel trusses which each measures 165' in length and two concrete approaches. The overall length of t... More
South Street Seaport, Piers 17 & 18, South Street into East River at F...
Significance: Piers 17 and 18, located in the South Street Historic District Extension, stand as physical evidence of the water-oriented economy of New York City in its developmental years. The current piers w... More
Bridge over Bird Creek, Spanning Bird Creek, Avant, Osage County, OK
Significance: The bridge over Bird Creek at Avant is one of the earliest overhead truss bridges of known construction date and known construction company in the State of Oklahoma. Survey number: HAER OK-2 Bui... More
Broad River Highway Bridge, State Route 72, spanning Broad River, Carl...
Significance: The Broad River Highway Bridge is an open spandrel concrete arch bridge built in 1935. The bridge is composed of three open spandrel concrete arches measuring 151' each and two other spans. The ... More
Hartford & New Haven Railroad, Freight Depot, 40 Central Street, Winds...
Significance: With its simple form, this building provides a typical example of 19th century utilitarian architecture. There are, however, subtle details which allow it to complement surrounding buildings such... More
Turtleville Iron Bridge, Spanning Turtle Creek, on Lathers Road, Beloi...
Significance: The Turtleville Iron Bridge carries Lather Road 140 feet, from abutment face to abutment face, across Turtle Creek. It was built in 1887 by the Wisconsin Bridge and Iron Company, and is a Pratt t... More
North Carolina Route 1334 Bridge, Spanning Deep River, Jamestown, Guil...
Significance: Designed as a two lane bridge in 1928, it contains the heaviest construction of the Pratt pony style of bridge. It is an 83', six panel, riveted truss. The end posts and upper chords are of buil... More
North Carolina Route 1334 Bridge, Spanning Deep River, Jamestown, Guil...
Significance: Designed as a two lane bridge in 1928, it contains the heaviest construction of the Pratt pony style of bridge. It is an 83', six panel, riveted truss. The end posts and upper chords are of buil... More
Berry Hill Bridge, Spanning Dan River at State Route 1761 (Virginia St...
Significance: The bridge is a fine example of a Camelback truss with integrity intact. Survey number: HAER NC-38 Building/structure dates: 1914 Initial Construction
Berry Hill Bridge, Spanning Dan River at State Route 1761 (Virginia St...
Significance: The bridge is a fine example of a Camelback truss with integrity intact. Survey number: HAER NC-38 Building/structure dates: 1914 Initial Construction
Berry Hill Bridge, Spanning Dan River at State Route 1761 (Virginia St...
Significance: The bridge is a fine example of a Camelback truss with integrity intact. Survey number: HAER NC-38 Building/structure dates: 1914 Initial Construction
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
Green Butte Copper Company, McCarthy Creek 12 miles Northeast of McCar...
Significance: Originally staked by John Barrett, mine promoter and town father of McCarthy, this site is representative of the copper camps that sprung up near the productive Kennecott mine during the high meta... 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
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
Cornish-Windsor Covered Bridge, Spanning Connecticut River between Cor...
Significance: The Cornish-Windsor Bridge is the longest covered bridge in the U.S. and the second-longest two-span covered bridge in the world. It is an excellent example of the work of James Tasker and Bela F... 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