Holston Army Ammunition Plant, Along Holston River, Kingsport, Sulliva...
Significance: During WWII, the plant made several significant contributions to explosives-manufacturing technology. It was the first large-scale facility to implement the nearly developed Bachmann process in th... More
Old Croton Aqueduct, Entrance Entablature, New Croton Reservoir, Yorkt...
Significance: The Old Croton Aqueduct is an outstanding example of 19th century civil engineering and was New York City's first municipal water project. The entrance entablature commemorated the opening of the... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... More
Old Croton Aqueduct, New York, New York County, NY
Significance: The Old Croton Aqueduct was New York City's first municipal water supply project, and is an outstanding example of early 19th century civil engineering. Unprocessed Field note material exists for... 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
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
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
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
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
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
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Watervliet Arsenal, South Broadway, Watervliet, Albany County, NY
Significance: Though the War of 1812 stimulated its establishment, Watervliet Arsenal's busiest years occurred during the Mexican and Civil Wars. In 1889, it became the government's cannon factory, famous for ... More
Battle Creek Hydroelectric System, Battle Creek & Tributaries, Red Blu...
STORED OFF SITE AND ON SITE. mchr Significance: The Battle Creek hydroelectric system was a typical turn-of-the-century California hydroelectric system, characterized by high head plants, the use of the impulse... More
Battle Creek Hydroelectric System, Battle Creek & Tributaries, Red Blu...
STORED OFF SITE AND ON SITE. mchr Significance: The Battle Creek hydroelectric system was a typical turn-of-the-century California hydroelectric system, characterized by high head plants, the use of the impulse... More
Battle Creek Hydroelectric System, Battle Creek & Tributaries, Red Blu...
STORED OFF SITE AND ON SITE. mchr Significance: The Battle Creek hydroelectric system was a typical turn-of-the-century California hydroelectric system, characterized by high head plants, the use of the impulse... More