United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... 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
Davidson Ditch Waste Water Weir, Mile 63 of Alaska's Steese Highway, C...
Significance: The Davidson Ditch was among the State's earliest long distance aqueducts and it played an important role in the development of Alaska's gold-mining industry. J.B. Lippincott, consulting engineer... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... More
United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... 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
Davidson Ditch Waste Water Weir, Mile 63 of Alaska's Steese Highway, C...
Significance: The Davidson Ditch was among the State's earliest long distance aqueducts and it played an important role in the development of Alaska's gold-mining industry. J.B. Lippincott, consulting engineer... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... 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
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
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
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... 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
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... More
United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... 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
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... More
United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... 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
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
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
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
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
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... 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
Davidson Ditch Waste Water Weir, Mile 63 of Alaska's Steese Highway, C...
Significance: The Davidson Ditch was among the State's earliest long distance aqueducts and it played an important role in the development of Alaska's gold-mining industry. J.B. Lippincott, consulting engineer... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... More
United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... 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
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
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Lamm's Mill, Sterner & Sleepy Hollow Roads (North Heidelburg Township)...
Significance: This 3 1/2 story limestone masonry grist and saw mill was abandoned about forty years ago. The 35 by 40 feet structure replaced the earlier, ca. 1800, mill built here by "Fishers." The existing ... More
United Clay Products Company, New York Avenue Brickyard, 2801 New York...
Significance: These beehive brick kilns are representative of a type common in the industry. They are the only such survivors from the over one hundred brickyards which operated in the Washington area in the e... 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
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Marietta Road Bridge, Marietta Road, Spanning Inman Railroad Yards, At...
Significance: The Marietta Road Bridge comprises a pair of three span pin connected Double Intersection Pratt through trusses. Its designer and/or fabricator are unknown but the technological character of the ... More
Lamm's Mill, Sterner & Sleepy Hollow Roads (North Heidelburg Township)...
Significance: This 3 1/2 story limestone masonry grist and saw mill was abandoned about forty years ago. The 35 by 40 feet structure replaced the earlier, ca. 1800, mill built here by "Fishers." The existing ... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... 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
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
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Double Intersection Warren Truss Bridge, Spanning Blackledge River, Co...
Significance: Typical of truss bridges at river crossings c. 1907, particularly as constructed by the New York, New Haven and Hartford Railroad in its upgrading o the then 40 year old line. Unlike similar brid... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... More
Van Duzen Bridge, Spanning Van Duzen River at State Highway 36, Carlot...
Significance: This is a highway bridge of open spandrel reinforced concrete deck arch type. It is associated with John B. Leonard - leading proponent and important early designer of reinforced concrete bridges... 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