Yonkers pressure tunnel. Steel ribs for concrete forms, made up of 5-i...
Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.
Earthquake - Calexico, Calif. , April 6, 2010 -- A magnitude 7. 2 ear...
The original database describes this as: Title: Photograph by Adam Dubrowa taken on 04/06/2010 in California Production Date: 04/06/2010 Caption: Calexico, Calif. , April 6, 2010 -- A magnitude 7. 2 earthqu... More
[Hurricane Katrina] Pascagoula, Miss., November 29, 2005 -- Large I-be...
Photographs Relating to Disasters and Emergency Management Programs, Activities, and Officials
I-Beams [Operable Unit-1 - Landfill Area]
Photographs Documenting Environmental Cleanup Operations at the Mound Site in Miamisburg, Ohio
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Storer College, Lewis Anthony Library, Camp Hill, Harpers Ferry, Jeffe...
Significance: Currently recognized by the National Park Service (NPS) as the "Lewis Anthony Building," this two-story stone building was an integral part of Storer College and its evolution as an educational in... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of...
Significance: Although partially reconstructed in 1960, the Virgin River Bridge retains its structural integrity. Attractive and well-executed, the bridge is a three-span, 'I' beam structure, which was skillfu... More
Interior work : construction of a courtyard, and of the structural fra...
Picryl description: Public domain image of a construction site, industrial or commercial building, free to use, no copyright restrictions.
Interior work : structural framework.
Picryl description: Public domain image of a construction site, wooden frame, timber, free to use, no copyright restrictions.
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Ponakin Road Bridge, Spanning Nashua River on Ponakin Road, Lancaster,...
Significance: The single span Ponakin Road Bridge is 100 feet long and 20 feet wide, with vertical end posts. The bridge has diagonal compression members and diagonal eye-bar tension members that extend two pa... More
Zion-Mount Carmel Highway, Upper Pine Creek Bridge, Spanning Upper Pin...
Significance: The Upper Pine Creek Bridge is significant for its association with the Zion-Mount Carmel Highway, constructed by the National Park Service and Bureau of Public Roads in 1927-30. The highway is l... More
Zion-Mount Carmel Highway, Upper Pine Creek Bridge, Spanning Upper Pin...
Significance: The Upper Pine Creek Bridge is significant for its association with the Zion-Mount Carmel Highway, constructed by the National Park Service and Bureau of Public Roads in 1927-30. The highway is l... More
Zion-Mount Carmel Highway, Upper Pine Creek Bridge, Spanning Upper Pin...
Significance: The Upper Pine Creek Bridge is significant for its association with the Zion-Mount Carmel Highway, constructed by the National Park Service and Bureau of Public Roads in 1927-30. The highway is l... More
Zion-Mount Carmel Highway, Upper Pine Creek Bridge, Spanning Upper Pin...
Significance: The Upper Pine Creek Bridge is significant for its association with the Zion-Mount Carmel Highway, constructed by the National Park Service and Bureau of Public Roads in 1927-30. The highway is l... More
Zion-Mount Carmel Highway, Upper Pine Creek Bridge, Spanning Upper Pin...
Significance: The Upper Pine Creek Bridge is significant for its association with the Zion-Mount Carmel Highway, constructed by the National Park Service and Bureau of Public Roads in 1927-30. The highway is l... More
Zion-Mount Carmel Highway, Upper Pine Creek Bridge, Spanning Upper Pin...
Significance: The Upper Pine Creek Bridge is significant for its association with the Zion-Mount Carmel Highway, constructed by the National Park Service and Bureau of Public Roads in 1927-30. The highway is l... More
Zion-Mount Carmel Highway, Upper Pine Creek Bridge, Spanning Upper Pin...
Significance: The Upper Pine Creek Bridge is significant for its association with the Zion-Mount Carmel Highway, constructed by the National Park Service and Bureau of Public Roads in 1927-30. The highway is l... More