U.S. Naval Base, Pearl Harbor, Naval Housing Area Makalapa, Senior Off...
Significance: This housing type is significant as residences for most of the flag officers of the Navy in Hawaii from 1941 to the present, and as an example of Hawaiian residential architecture during the 1940s... More
Fort Sam Houston, Blacksmith Shop & Tether Wall, San Antonio, Bexar Co...
2004 Charles E. Peterson Prize, Entry Significance: In June of 1893, the Blacksmith Shop was constructed simultaneously with the Tether Wall to handle the increased blacksmithing needs of the fort. Their presen... More
Fort Sam Houston, Blacksmith Shop & Tether Wall, San Antonio, Bexar Co...
2004 Charles E. Peterson Prize, Entry Significance: In June of 1893, the Blacksmith Shop was constructed simultaneously with the Tether Wall to handle the increased blacksmithing needs of the fort. Their presen... More
Oak Ridge Bridge, Spanning Southern Railroad at Virginia State Route 6...
Significance: The Oak Ridge Bridge is a representative example of a pin-connected wrought iron Pratt through truss typical of late nineteenth century factory-manufactured railroad bridges. The bridge was moved... More
Oak Ridge Bridge, Spanning Southern Railroad at Virginia State Route 6...
Significance: The Oak Ridge Bridge is a representative example of a pin-connected wrought iron Pratt through truss typical of late nineteenth century factory-manufactured railroad bridges. The bridge was moved... More
Hughes Aircraft Company, Assembly & Manufacturing Building, 6775 Centi...
Significance: Containing more than 400,000 square feet, Building 6 is the largest building within the Hughes complex. Located immediately south of Building 5, to which it is connected via a tunnel, Building 6 ... More
1019 East Fourteenth Avenue (House), 1019 East Fourteenth Avenue, Tamp...
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 b... 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
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
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
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
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
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
Blackhoof Street Bridge, Spanning Miami-Erie Canal, New Bremen, Auglai...
Significance: The Blackhoof Street Bridge is a rare example of a bowstring bridge whose major components are of cast iron. The bridge is also an early example of the work of David H. Morrison, founder of the C... More
Harbison-Walker Refractories Company, West end of Shirley Street, Moun...
Significance: The Mount Union plant was the first works in the United States constructed exclusively for the manufacture of silica brick. Harbison and Waker, of Pittsburgh, was one of the largest refractory ma... More
Architectural Remains, Project 103, Structure 125, Jamestown, James Ci...
Significance: Likely Structure 125 served as a tavern and was the one documentary evidence records as being operated by Thomas Rabley in the 1680s and 1690s. Architectural and archaeological evidence reveals a... More
1821 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
1821 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
Anaconda Reduction Department, Southeast side of Warm Springs Valley, ...
Significance: The Foundry Department of the Anaconda Reduction Department was organized as an independent venture in the late 1880s. Originally known as the Anaconda Hardware Company - dealers in stoves, iron, ... More
Anaconda Reduction Department, Southeast side of Warm Springs Valley, ...
Significance: The Foundry Department of the Anaconda Reduction Department was organized as an independent venture in the late 1880s. Originally known as the Anaconda Hardware Company - dealers in stoves, iron, ... More
St. Elizabeths Hospital, West Wing, 539-559 Cedar Drive, Southeast, Wa...
For an overview of the Center Building Group, see HABS DC-349-BT Significance: The West Wing (Building 3) is significant for its association with the treatment of mental illness at the St. Elizabeths campus. As... More
St. Elizabeths Hospital, West Wing, 539-559 Cedar Drive, Southeast, Wa...
For an overview of the Center Building Group, see HABS DC-349-BT Significance: The West Wing (Building 3) is significant for its association with the treatment of mental illness at the St. Elizabeths campus. As... More
General Dynamics Corporation Shipyard, Outfitting Pier No. 3, 97 East ...
Significance: Constructed in 1942-43, Pier 3 is significant as an integral component of the Quincy-Fore River Shipyard facilities from the World War II period until the closing of the yard in 1984. Fitting out... More
U.S. Naval Base, Pearl Harbor, Naval Housing Area Makalapa, Senior Off...
Significance: This housing type is significant as the residence of flag officers of the Navy in Hawaii from 1941 to the present, and as an example of Hawaiian residential architecture during the 1940s, in a gro... More
Watertown Arsenal, Building No. 43, Arsenal Street, Watertown, Middles...
Significance: Building No. 43 is one of the earliest buildings on the present AMTL property and was integral to the industrial development of the Watertown Arsenal after 1862. It was originally erected as a Sm... More
Powder Works Bridge, Spanning San Lorenzo River, Keystone Way, Paradis...
type-4 Smith Truss; 180' long; 2 span Significance: Powder Works Bridge is the second oldest of twenty-one extant Smith truss covered bridges in the United States. It was built in 1872 for the California Powde... More
Powder Works Bridge, Spanning San Lorenzo River, Keystone Way, Paradis...
type-4 Smith Truss; 180' long; 2 span Significance: Powder Works Bridge is the second oldest of twenty-one extant Smith truss covered bridges in the United States. It was built in 1872 for the California Powde... More
Rogers Locomotive & Machine Works, Erecting Shop, Spruce & Market Stre...
Significance: The Erecting Shop is the oldest of the structures surviving from the complex which formed the Rogers Locomotive and Machine Works. Although all the equipment and machinery have been removed, its ... More
Frankford Arsenal, Building No. 309, South of Hagner Road to west of C...
Significance: Building 309 is associated with the continued growth of Frankford Arsenal, the United States Army's principal manufacturer of small arms ammunition, during the twentieth century. Survey number: H... More
Fannin-Truitt-Handley House, Woodshed, 2301 Whitesville Road, La Grang...
Significance: The woodshed and other manufacturing-related buildings on the Handley grounds point to the importance of the Handley Plantation in the local agricultural economy. Survey number: HABS GA-2364-A B... More
Norfolk Manufacturing Company Cotton Mill, 90 Milton Street, Dedham, N...
Significance: The 1835 mill is typical in scale of New England fabric production at the time, but is unusual because it was based on Rhode Island stone mills, rather than the more usual brick type found in Mass... More
Henry G. & Frances Kleinfelter House, 312 North Pinckney Street, Madis...
Significance: This two-and-one-half-story frame Queen Anne house was built in 1900 for the Kleinfelter family, Henry G. and his wife, Frances. Henry Kleinfelter's family were among the early settlers of Dane C... More
Big Hole Pump Station, Old Highway 43, Divide, Silver Bow County, MT
The address has been updated from "Old Highway #43" to "816 Pumphouse Road (Old Highway 43)." Significance: The Big Hole Pump Station and original rock-filled crib dam were constructed in 1899. Butte Water Comp... More
Laurel Valley Sugar Plantation, Sugar Mill, 2 miles South of Thibodaux...
Significance: Although the building is now in ruins, a large collection of plantation records covering the period 1897-1926 has survived. Thus the manufacture of sugar can be examined from the perspective of a ... More
Laurel Valley Sugar Plantation, Sugar Mill, 2 miles South of Thibodaux...
Significance: Although the building is now in ruins, a large collection of plantation records covering the period 1897-1926 has survived. Thus the manufacture of sugar can be examined from the perspective of a ... More
Laurel Valley Sugar Plantation, Sugar Mill, 2 miles South of Thibodaux...
Significance: Although the building is now in ruins, a large collection of plantation records covering the period 1897-1926 has survived. Thus the manufacture of sugar can be examined from the perspective of a ... More
Laurel Valley Sugar Plantation, Sugar Mill, 2 miles South of Thibodaux...
Significance: Although the building is now in ruins, a large collection of plantation records covering the period 1897-1926 has survived. Thus the manufacture of sugar can be examined from the perspective of a ... More
Tift & Company, Ships Chandlery & Icehouse, Mallory Square, Key West, ...
Significance: The northern building is the city's oldest commercial building, and was built by Amos C. Tift and Co. as a ships chandlery. The land on which the building was constructed was part of the Naval Ya... More
Fort McCoy, Building No. T-2112, South Side of South Eighth Avenue, Ap...
Significance: Building T-2112 is the only example of an Ice Storage Building, Type IS-30 located at Fort McCoy. Based on a comparison of field observations and the drawings on file at the installation that wer... More
Fort McCoy, Building No. T-2112, South Side of South Eighth Avenue, Ap...
Significance: Building T-2112 is the only example of an Ice Storage Building, Type IS-30 located at Fort McCoy. Based on a comparison of field observations and the drawings on file at the installation that wer... More
Ypsilanti Reed Furniture Company, Building B, 119 South Dexter Street,...
Significance: This factory building served as the one of the manufacturing building of the Ypsilanti Reed Furniture Company from 1923 until 1948. It was also one of the factory buildings used by the Ionia Manu... More
Ypsilanti Reed Furniture Company, Building B, 119 South Dexter Street,...
Significance: This factory building served as the one of the manufacturing building of the Ypsilanti Reed Furniture Company from 1923 until 1948. It was also one of the factory buildings used by the Ionia Manu... More
1811 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 a section of Tampa founded and buil... 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
U.S. Coast Guard Yard, Building No. 58, Billard Avenue, Baltimore, Ind...
Significance: Influenced by early 20th-century international industrial building design, Building 58 is an example of the multiple-use structures erected at the U.S. Coast Guard Yard during World War II to acco... More
Fort McCoy, Building No. T-901, 125' South of Intersection of East "S"...
Significance: Building T-901 is significant as a relatively unaltered representative of a Type RCQ-1, Regimental Commander's Quarters. This building is one of nine examples of this building type constructed at... More
Fort McCoy, Building No. T-901, 125' South of Intersection of East "S"...
Significance: Building T-901 is significant as a relatively unaltered representative of a Type RCQ-1, Regimental Commander's Quarters. This building is one of nine examples of this building type constructed at... More
High Uptown Neighborhood, Second Avenue from 1523 to 1645, Columbus, M...
Significance: The Columbus Historic District is approximately 166 acres of historic structures dating from 1828 to the late 1930s. This part of the city retains its original grid, wide tree lined streets, and s... More
High Uptown Neighborhood, Second Avenue from 1523 to 1645, Columbus, M...
Significance: The Columbus Historic District is approximately 166 acres of historic structures dating from 1828 to the late 1930s. This part of the city retains its original grid, wide tree lined streets, and s... More
High Uptown Neighborhood, Second Avenue from 1523 to 1645, Columbus, M...
Significance: The Columbus Historic District is approximately 166 acres of historic structures dating from 1828 to the late 1930s. This part of the city retains its original grid, wide tree lined streets, and s... More
High Uptown Neighborhood, Second Avenue from 1523 to 1645, Columbus, M...
Significance: The Columbus Historic District is approximately 166 acres of historic structures dating from 1828 to the late 1930s. This part of the city retains its original grid, wide tree lined streets, and s... More
Pine Valley, Littlefield, Mohave County, AZ
Significance: Pine Valley is one of seven line camps used by Jonathan Deyo Waring and his ranch hands to manage the Home Ranch grazing allotment, now known as Waring Ranch, a large cattle-grazing operation on a... More
Fries Manaufacturing & Power Company, Idols Station, Yadkin River, Cle...
Significance: First hydroelectric plant in North Carolina. Survey number: HAER NC-9 Building/structure dates: 1914 Subsequent Work Building/structure dates: ca. 1897- 1898 Initial Construction
Fries Manaufacturing & Power Company, Idols Station, Yadkin River, Cle...
Significance: First hydroelectric plant in North Carolina. Survey number: HAER NC-9 Building/structure dates: 1914 Subsequent Work Building/structure dates: ca. 1897- 1898 Initial Construction
Thames Tow Boat Company, Headhouse, Uncasville, New London, New London...
Unprocessed Field note material exists for this structure: FN-4 Survey number: HAER CT-1-A Building/structure dates: 1903 Initial Construction
Fort McCoy, Building No. T-1001, South Side of Eleventh Avenue, Block ...
Significance: Building T-1001 is a Dental Clinic, Type DC-2, the only building of this type constructed in the hospital area at Camp McCoy. It was used for the dental care of soldiers, both patients and those ... More
U.S. Naval Base, Pearl Harbor, Industrial X-Ray Building, Off Sixth St...
Significance: It is a contributing resource to the Pearl Harbor National Historic Landmark and a unique facility introducing new technology for examination of shipyard materials. It is a distinctive building ty... More
U.S. Naval Base, Pearl Harbor, Industrial X-Ray Building, Off Sixth St...
Significance: It is a contributing resource to the Pearl Harbor National Historic Landmark and a unique facility introducing new technology for examination of shipyard materials. It is a distinctive building ty... More
Frankford Arsenal, Building No. 65, South of Tacony Street between Bri...
Significance: Established in 1816, the Frankford Arsenal served for three decades as a depot for the storage and repair of arms, accoutrements, and ammunition for the United States Army. From 1849 to 1976, the... More
Douglas Aircraft Company Long Beach Plant, 3855 Lakewood Boulevard, Lo...
Significance: As the Douglas Aircraft Company Long Beach plant, the facility made a significant contribution to the development of the aviation industry in southern California. It was constructed as a critical... More
Ames Hydroelectric Plant, Ames, San Miguel County, CO
Significance: In 1890-91 L.L. Nunn built the world's first single-phase AC power transmission system at Ames in order to power the nearby Gold King Mine's stamp mill. The plant operated under a head of 320 feet... More
Noxontown Mill, Noxontown Road (County Road 38), Middletown, New Castl...
Significance: Noxontown Mill was typical of the small grain-milling establishments that predominated in Delaware throughout the colonial period. But it was atypical in the sense that it survived so long. In 1... More
Noxontown Mill, Noxontown Road (County Road 38), Middletown, New Castl...
Significance: Noxontown Mill was typical of the small grain-milling establishments that predominated in Delaware throughout the colonial period. But it was atypical in the sense that it survived so long. In 1... More
Noxontown Mill, Noxontown Road (County Road 38), Middletown, New Castl...
Significance: Noxontown Mill was typical of the small grain-milling establishments that predominated in Delaware throughout the colonial period. But it was atypical in the sense that it survived so long. In 1... More
Noxontown Mill, Noxontown Road (County Road 38), Middletown, New Castl...
Significance: Noxontown Mill was typical of the small grain-milling establishments that predominated in Delaware throughout the colonial period. But it was atypical in the sense that it survived so long. In 1... More
Noxontown Mill, Noxontown Road (County Road 38), Middletown, New Castl...
Significance: Noxontown Mill was typical of the small grain-milling establishments that predominated in Delaware throughout the colonial period. But it was atypical in the sense that it survived so long. In 1... More
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela Riv...
See also HAER PA-200 for additional documentation. Includes written data (pages 76 through 94). Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the na... More
William Elliot House, 2206 Newport Gap Pike (State Route 41), Prices C...
Significance: The William Elliot House documents the growth of the Greenback area from a predominantly rural agricultural landscape into an industrial/manufacturing community and transportation center. It is a... More
William Elliot House, 2206 Newport Gap Pike (State Route 41), Prices C...
Significance: The William Elliot House documents the growth of the Greenback area from a predominantly rural agricultural landscape into an industrial/manufacturing community and transportation center. It is a... More
San Francisco Fire Department, Pumping Station No. 2, Van Ness Avenue ...
Significance: A well preserved, representative example of an early 20th century Steam powered water pumping station. The site also retains historical significance because of its associations with the city's fi... More
San Francisco Fire Department, Pumping Station No. 2, Van Ness Avenue ...
Significance: A well preserved, representative example of an early 20th century Steam powered water pumping station. The site also retains historical significance because of its associations with the city's fi... More
San Francisco Fire Department, Pumping Station No. 2, Van Ness Avenue ...
Significance: A well preserved, representative example of an early 20th century Steam powered water pumping station. The site also retains historical significance because of its associations with the city's fi... More
Fort McCoy, Building No. T-1559, Northeast Corner of Intersection of S...
Significance: Building T-1559 is the only example of a Telephone and Telegraph Office (Type TT-4) located at Fort McCoy. The construction of Building T-1559 was part of a massive, nation-wide mobilization prog... More
Virginia Department of Transportation Bridge No. 6023, Spanning Norfol...
Significance: Virginia Department of Transporation Bridge No. 6051 is a five-panel Pratt through truss bridge 73'-11 1/2" in length. Manufactured by the Keystone Bridge Company of Pittsburgh, Pennsylvania in 1... More
Virginia Department of Transportation Bridge No. 6023, Spanning Norfol...
Significance: Virginia Department of Transporation Bridge No. 6051 is a five-panel Pratt through truss bridge 73'-11 1/2" in length. Manufactured by the Keystone Bridge Company of Pittsburgh, Pennsylvania in 1... More
Burks' Makers Mark Distillery, Loretto, Marion County, KY
Significance: Represents the growth of distilling as a major industry in Kentucky, after the Pinckney Treaty gave U.S. citizens to unhampered passage down the Mississippi to New Orleans. It also marks the deve... More
R. K. LeBlond Machine Tool Company, Madison & Edwards Road, 2980 Madis...
Significance: The Madison and Edwards Road plant of The R.K. Le Blond Machine Tool Company (in service 1918-1989) is an example of the early 20th century "factory beautiful" movement in American industry. At t... More
Middle Creek Hydroelectric Dam, On Middle Creek, West of U.S. Route 15...
Significance: The Middle Creek Hydroelectric Dam is a significant example of a timber crib dam and small electric generating station, that is typical of early rural electrification in America. Locally it was a... More
Middle Creek Hydroelectric Dam, On Middle Creek, West of U.S. Route 15...
Significance: The Middle Creek Hydroelectric Dam is a significant example of a timber crib dam and small electric generating station, that is typical of early rural electrification in America. Locally it was a... More
2502 North Thirteenth Street (House), 2502 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
U.S. Naval Base, Pearl Harbor, Naval Housing Area Makalapa, Angle Two-...
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
Frankford Arsenal, Building No. 68, Southeast corner of Walbach Street...
Significance: Building 68, constructed as a fuze loading house, is associated with the expansion of Frankford Arsenal during World War II. Used as a laboratory after 1946, the building is also associated with ... More
Frankford Arsenal, Building No. 68, Southeast corner of Walbach Street...
Significance: Building 68, constructed as a fuze loading house, is associated with the expansion of Frankford Arsenal during World War II. Used as a laboratory after 1946, the building is also associated with ... More
Inman Manufacturing Company, 53 Guy Park Avenue, Amsterdam, Montgomery...
Significance: The Inman Manufacturing Company complex, built at various times between 1877 to 1920, was used to produce some of the earliest paper box making machinery. This machinery had a significant effect ... More
Estate Clifton Hill, Sugar Factory & Rum Distillery, South Central Str...
Significance: Estate Clifton Hill produced cane sugar and rum from its initial settlement in the early 1750s to about 1900. An animal mill was in use to crush sugar cane by 1754 and was replaced a few years lat... More
Estate Clifton Hill, Sugar Factory & Rum Distillery, South Central Str...
Significance: Estate Clifton Hill produced cane sugar and rum from its initial settlement in the early 1750s to about 1900. An animal mill was in use to crush sugar cane by 1754 and was replaced a few years lat... More
Watervliet Arsenal, Building No. 15, Buffington Street between Symingt...
Significance: One of two similar structures apparently built in 1839 as carriage storehouses, this building represents one of the few remaining vestiges of carriage making and storage, an important element of n... More
U.S. Naval Base, Pearl Harbor, Naval Housing Area Makalapa, Senior Off...
Significance: This house is significant as the residence of flag officers of the Navy in Hawaii from 1941 to the present, and as an example of Hawaiian residential architecture during the 1940s, in a grouping o... More
Faro de Puerto Ferro, Isla de Vieques, Vieques, Vieques Municipio, PR
Significance: Puerto Ferro Light was established in 1896 as an octagonal tower on top of a rectangular dwelling. Its primary characteristics were a 5th order white flashing light every 5 seconds and a 12 mile ... More
Faro de Puerto Ferro, Isla de Vieques, Vieques, Vieques Municipio, PR
Significance: Puerto Ferro Light was established in 1896 as an octagonal tower on top of a rectangular dwelling. Its primary characteristics were a 5th order white flashing light every 5 seconds and a 12 mile ... More
Monongahela Railroad, New Geneva Bridge, Spanning Monongahela River, S...
Significance: The bridge at New Geneva is significant for its long Petit through through truss, and more importantly, for its erection by end manufacturing. At the time of its construction, it was the longest a... More
1815 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
1815 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
Bates Manufacturing Company, Storehouse, Northeast corner of Chestnut ...
Significance: This cotton storage building was built by the Bates Manufacturing Company to store large shipments of cotton required to supply the newly developed Jacquard Weaving Mill No. 6, constructed in 1892... More
Bates Manufacturing Company, Storehouse, Northeast corner of Chestnut ...
Significance: This cotton storage building was built by the Bates Manufacturing Company to store large shipments of cotton required to supply the newly developed Jacquard Weaving Mill No. 6, constructed in 1892... More
Quick City Bridge, Spanning Big Creet at County Road 594, Quick City, ...
Significance: Between the early 1880s, when trusses superseded bowstrings, and the 1920s, when riveted connections replaced pinned, the pin-connected Pratt truss was the metal structure of choice for medium- an... More
U.S. Steel Duquesne Works, West bank of Monongahela River along State ...
Significance: The construction of the Duquesne Steel Works marked an important event in the movement toward integrated steel producing ventures in the Monongahela Valley of western Pennsylvania. Constructed af... More
Rock Island Arsenal, Building No. 110, Rodman Avenue between Fourth St...
Significance: After taking command of Rock Island Arsenal in 1865, General Thomas Jefferson Rodman devised a master plan for the installation calling for the construction of ten large, Greek Revival, manufactur... More