Significance: The Drew-Sherwood Tank House is a contributive outbuilding on the Drew-Sherwood Farm. Built circa 1920 by David Sherwood or his son-in-law, Andrew Allen, the three-story tank house with attached More
Significance: The Southern Pacific Railroad Cascade Route, built as the Natron Cutoff between Black Butte, California and Natron, Oregon was one of a series of major rebuildings and realignments of the original More
Significance: There is no documentary or pictorial evidence concerning the age or origins of the Water Tank. A description of the Joyce Estate, published in 1922, noted that the sleeping cottages in the Main C More
Significance: The Over-the-Horizon Backscatter radar network was an important physical and scientific product of the Cold War. From theories that had been conceived in the days of early long-distance radio tra More
Significance: The Over-the-Horizon Backscatter radar network was an important physical and scientific product of the Cold War. From theories that had been conceived in the days of early long-distance radio tran More
Significance: The Over-the-Horizon Backscatter radar network was an important physical and scientific product of the Cold War. From theories that had been conceived in the days of early long-distance radio tra More
Significance: Building 310 is associated with the continued use of Frankford Arsenal as a U.S. Army facility during the mid-twentieth century. Survey number: HAER PA-74-BT Building/structure dates: 1949 Initi More
Significance: The penstocks and surge tanks were built to conduct water from the intake house (HAER ND-15-D) at Lake Sakakawea to the powerhouse (HAER ND-15-A). The surge tanks primarily provide pressure relief More
Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description
Established in 1894, Lowell is among the oldest astronomical observatories in the United States. In 2011, it was named one of "The World's 100 Most Important Places" by Time magazine. Title, date and keywords b More
Title, date and keywords based on information provided by the photographer. The 11-mile line, high into the mountains, as well as the old "company town" of Cass and what's left of what was once an enormous lumb More
Significance: The water tanks (Facility Nos. 188A and 188B), built circa 1916, are considered significant for their association with United States (U.S.) Naval history and the Mare Island Naval Shipyard (MINSY) More
Significance: The water tanks (Facility Nos. 188A and 188B), built circa 1916, are considered significant for their association with United States (U.S.) Naval history and the Mare Island Naval Shipyard (MINSY) More
Significance: The water tanks (Facility Nos. 188A and 188B), built circa 1916, are considered significant for their association with United States (U.S.) Naval history and the Mare Island Naval Shipyard (MINSY) More
Significance: This functional structure, a tower is visible from virtually the entire base, was erected during the period of initial permanent construction at Selfridge to service the water distribution system More
Significance: This functional structure, a tower is visible from virtually the entire base, was erected during the period of initial permanent construction at Selfridge to service the water distribution system More
Significance: This functional structure, a tower is visible from virtually the entire base, was erected during the period of initial permanent construction at Selfridge to service the water distribution system More
Significance: This functional structure, a tower is visible from virtually the entire base, was erected during the period of initial permanent construction at Selfridge to service the water distribution system More
Picryl description: Public domain image of a ship, navy, harbor, maritime photograph, 19th-20th century architecture, free to use, no copyright restrictions.