Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Gervais Street Bridge, Gervais Street spanning Congaree River, Columbi...
Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.
Gervais Street Bridge, Gervais Street spanning Congaree River, Columbi...
Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.
Illinois Central Gulf Railroad Bridge, Spanning Big Black River 9-10 M...
Survey number: HAER MS-6 National Register of Historic Places NRIS Number: 88002418
North Avenue Viaduct, Spanning Milwaukee River & Chicago, Milwaukee & ...
Significance: The North Avenue Viaduct is one of Milwaukee's largest spans. Designed by J.C. Pinney, the reinforced concrete bridge employs a complex open spandrel, ribbed arch support system. The structure o... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Gervais Street Bridge, Gervais Street spanning Congaree River, Columbi...
Picryl description: Public domain image of a bridge, water, historic structure, free to use, no copyright restrictions.
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Grand Avenue Viaduct, West Wisconsin Avenue, Milwaukee, Milwaukee Coun...
Significance: The Grand Avenue Viaduct, Milwaukee's earliest example of a large scale concrete bridge, was the result of a national design competition which included entries from some of the most prominent arch... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
North Avenue Viaduct, Spanning Milwaukee River & Chicago, Milwaukee & ...
Significance: The North Avenue Viaduct is one of Milwaukee's largest spans. Designed by J.C. Pinney, the reinforced concrete bridge employs a complex open spandrel, ribbed arch support system. The structure o... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Grand Avenue Viaduct, West Wisconsin Avenue, Milwaukee, Milwaukee Coun...
Significance: The Grand Avenue Viaduct, Milwaukee's earliest example of a large scale concrete bridge, was the result of a national design competition which included entries from some of the most prominent arch... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Gervais Street Bridge, Gervais Street spanning Congaree River, Columbi...
Picryl description: Public domain image of a river, water stream, lake or pond, park or forest, natural landscape, free to use, no copyright restrictions.
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Illinois Central Gulf Railroad Bridge, Spanning Big Black River 9-10 M...
Survey number: HAER MS-6 National Register of Historic Places NRIS Number: 88002418
Illinois Central Gulf Railroad Bridge, Spanning Big Black River 9-10 M...
Survey number: HAER MS-6 National Register of Historic Places NRIS Number: 88002418
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Milwaukee Street Bridge, Spanning Rock River, Watertown, Jefferson Cou...
Significance: Watertown city officials declared the existing Milwaukee Street Bridge unsafe in 1929 and began considering plans for erecting a steel girder or concrete bridge. Daniel B. Luten, a prominent brid... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Gervais Street Bridge, Gervais Street spanning Congaree River, Columbi...
Picryl description: Public domain image of an arch bridge, stone structure, architecture, free to use, no copyright restrictions.
Gervais Street Bridge, Gervais Street spanning Congaree River, Columbi...
Public domain photograph of tower, column, free to use, no copyright restrictions image - Picryl description
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 1...
Significance: The Van Duzen River Bridge, also known as the Alton Bridge, was determined eligible for listing in the National Register of Historic Places in 1986. It represents a transitional design in the evo... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Presumpscot Falls Bridge, Spanning Presumptscot River at Allen Avenue ...
Significance: Constructed in 1913 by the Sanders Construction Co. for the Town of Falmouth at a cost of $15,167.38, the Presumpscot Falls Bridge is an open spandrel, reinforced concrete arch structure. At the ... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Freeman's Crossing Bridge, Spanning Middle Fork of Yuba River at CA St...
Significance: Freeman's Crossing Bridge, also known as the Middle Yuba Bridge and determined eligible for the National Register of Historic Places in 1986, is an excellent example of a reinforced concrete open-... More
Gervais Street Bridge, Gervais Street spanning Congaree River, Columbi...
Public domain photograph - historical image of South Carolina, United States, free to use, no copyright restrictions image - Picryl description
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville,...
Significance: The Parks Bar Bridge is significant under Criterion C, as a distinctive example of an unusual method of construction. It is one of the earliest and largest remaining examples of the Thomas System... More
Ashtabula Viaduct, Spanning Ashtabula River at U.S. Route 20 (Prospect...
Significance: This concrete, open spandrel rib arch viaduct is of engineering significance for its outstanding design feature of a complete separation of the superstructures at the end of each span using only a... More