Pennsylvania Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Was...
Significance: Cast-iron water mains from the Aqueduct Bridge by Montgomery Meigs, the span that preceded the present bridge, are encased in the concrete arch and are visible on the underside. These pipes were ... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Massachusetts Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Wa...
Significance: This bridge, on axis with Massachusetts Avenue, replaced an earth-fill crossing that had been constructed in 1901; it was breached by a culvert through which a narrow two-lane road later passed. ... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Pennsylvania Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Was...
Significance: Cast-iron water mains from the Aqueduct Bridge by Montgomery Meigs, the span that preceded the present bridge, are encased in the concrete arch and are visible on the underside. These pipes were ... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
U.S. Route 50 Overpass, Westbound, Spanning GWMP at U.S. Route 50 & Ar...
Significance: Built as part of the Pentagon Road Network. Survey number: HAER DC-40 Building/structure dates: 1946 Initial Construction
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
K Street Bridge, Spanning Rock Creek & Potomac Parkway, Washington, Di...
Significance: K Street was the site of the second crossing between Georgetown and Washington, with a bridge built here in 1792. The present bridge is an important link in the transportation artery that connect... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Wood National Cemetery, 5000 West National Avenue, Milwaukee, Milwauke...
Significance: Wood National Cemetery is located on the grounds of the Clement J. Zablocki Veterans Administration Medical Center, originally the Northwestern Branch of the National Home for Disabled Volunteer S... More
Wood National Cemetery, 5000 West National Avenue, Milwaukee, Milwauke...
Significance: Wood National Cemetery is located on the grounds of the Clement J. Zablocki Veterans Administration Medical Center, originally the Northwestern Branch of the National Home for Disabled Volunteer S... More
Pennsylvania Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Was...
Significance: Cast-iron water mains from the Aqueduct Bridge by Montgomery Meigs, the span that preceded the present bridge, are encased in the concrete arch and are visible on the underside. These pipes were ... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Old Harvard Street Bridge, Spanning Rock Creek at National Zoological ...
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Milkhouse Ford, Washington, District of Columbia, DC
Significance: The only operable creek crossing in Rock Creek Park, Milkhouse Ford survives as a reminder of the days when fords were plentiful in the area, and were the only means of traversing the creek. Regu... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Wood National Cemetery, 5000 West National Avenue, Milwaukee, Milwauke...
Significance: Wood National Cemetery is located on the grounds of the Clement J. Zablocki Veterans Administration Medical Center, originally the Northwestern Branch of the National Home for Disabled Volunteer S... More
Massachusetts Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Wa...
Significance: This bridge, on axis with Massachusetts Avenue, replaced an earth-fill crossing that had been constructed in 1901; it was breached by a culvert through which a narrow two-lane road later passed. ... More
Old Harvard Street Bridge, Spanning Rock Creek at National Zoological ...
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Wood National Cemetery, 5000 West National Avenue, Milwaukee, Milwauke...
Significance: Wood National Cemetery is located on the grounds of the Clement J. Zablocki Veterans Administration Medical Center, originally the Northwestern Branch of the National Home for Disabled Volunteer S... More
Wood National Cemetery, 5000 West National Avenue, Milwaukee, Milwauke...
Significance: Wood National Cemetery is located on the grounds of the Clement J. Zablocki Veterans Administration Medical Center, originally the Northwestern Branch of the National Home for Disabled Volunteer S... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Riley Springs Footbridge, Washington, District of Columbia, DC
Significance: Riley Springs Footbridge is one of a series of eight footbridges built in Rock Creek Park during the Depression, of which Rapids Footbridge (HAER No. DC-14) is the most notable. All these bridges... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Boundary Footbridge, Washington, District of Columbia, DC
Significance: Boundary Footbridge is one of a series of eight footbridges built in Rock Creek Park during the Depression, of which Boundary Footbridge (HAER No. DC-14) is the most notable. All these bridges we... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Pennsylvania Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Was...
Significance: Cast-iron water mains from the Aqueduct Bridge by Montgomery Meigs, the span that preceded the present bridge, are encased in the concrete arch and are visible on the underside. These pipes were ... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
K Street Bridge, Spanning Rock Creek & Potomac Parkway, Washington, Di...
Significance: K Street was the site of the second crossing between Georgetown and Washington, with a bridge built here in 1792. The present bridge is an important link in the transportation artery that connect... More
K Street Bridge, Spanning Rock Creek & Potomac Parkway, Washington, Di...
Significance: K Street was the site of the second crossing between Georgetown and Washington, with a bridge built here in 1792. The present bridge is an important link in the transportation artery that connect... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Milkhouse Ford, Washington, District of Columbia, DC
Significance: The only operable creek crossing in Rock Creek Park, Milkhouse Ford survives as a reminder of the days when fords were plentiful in the area, and were the only means of traversing the creek. Regu... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Calvert Street Bridge, Spanning Rock Creek & Potomac Parkway, Washingt...
Significance: This bridge represents the response of a prominent team of designers to the demand of the Commission of Fine Art that the new structures harmonize with both the landscape and the nearby Connecticu... More
Massachusetts Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Wa...
Significance: This bridge, on axis with Massachusetts Avenue, replaced an earth-fill crossing that had been constructed in 1901; it was breached by a culvert through which a narrow two-lane road later passed. ... More
K Street Bridge, Spanning Rock Creek & Potomac Parkway, Washington, Di...
Significance: K Street was the site of the second crossing between Georgetown and Washington, with a bridge built here in 1792. The present bridge is an important link in the transportation artery that connect... More
Lyon's Mill Footbridge, Washington, District of Columbia, DC
Significance: Lyon's Mill Footbridge is one of a series of eight footbridges built in Rock Creek Park during the Depression, of which Lyon's Mill Footbridge (HAER No. DC-14) is the most notable. All these brid... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Wood National Cemetery, 5000 West National Avenue, Milwaukee, Milwauke...
Significance: Wood National Cemetery is located on the grounds of the Clement J. Zablocki Veterans Administration Medical Center, originally the Northwestern Branch of the National Home for Disabled Volunteer S... More
K Street Bridge, Spanning Rock Creek & Potomac Parkway, Washington, Di...
Significance: K Street was the site of the second crossing between Georgetown and Washington, with a bridge built here in 1792. The present bridge is an important link in the transportation artery that connect... More
Lyon's Mill Footbridge, Washington, District of Columbia, DC
Significance: Lyon's Mill Footbridge is one of a series of eight footbridges built in Rock Creek Park during the Depression, of which Lyon's Mill Footbridge (HAER No. DC-14) is the most notable. All these brid... More
Old Harvard Street Bridge, Spanning Rock Creek at National Zoological ...
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg... More
Virginia Avenue, Washington, District of Columbia, DC
Significance: This avenue was designed to emanate from the site indicated for a monument to George Washington. Interrupted by the Monument Grounds, it is divided into two distinct, unconnected segments, both of... More
Bluffs Footbridge, Washington, District of Columbia, DC
Significance: Bluffs Footbridge is one of a series of eight footbridges built in Rock Creek Park during the Depression, of which Bluffs Footbridge (HAER No. DC-14) is the most notable. All these bridges were P... More
Riley Springs Footbridge, Washington, District of Columbia, DC
Significance: Riley Springs Footbridge is one of a series of eight footbridges built in Rock Creek Park during the Depression, of which Rapids Footbridge (HAER No. DC-14) is the most notable. All these bridges... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Connecticut Avenue Bridge, Spanning Klingle Valley, Washington, Distri...
Significance: This single-arch, steel span was designed by the same eminent designers as the Calvert Street Bridge (HAER No. DC-23), which post-dates it by a few years. Of a different material than other Rock ... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Conne...
Significance: Designed by prominent engineer George B. Morison, Connecticut Avenue Bridge was described at the time of its construction as the largest concrete arch in the world. This seven-arch span was erect... More
Massachusetts Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Wa...
Significance: This bridge, on axis with Massachusetts Avenue, replaced an earth-fill crossing that had been constructed in 1901; it was breached by a culvert through which a narrow two-lane road later passed. ... More
Massachusetts Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Wa...
Significance: This bridge, on axis with Massachusetts Avenue, replaced an earth-fill crossing that had been constructed in 1901; it was breached by a culvert through which a narrow two-lane road later passed. ... More
Old Harvard Street Bridge, Spanning Rock Creek at National Zoological ...
Significance: This was the largest of the several Melan-arch bridges built in Rock Creek park in the first years of the twentieth century. Its Neoclasscial detailing differentiates the Old Harvard Street Bridg... More
Rolling Meadow Footbridge, Washington, District of Columbia, DC
Significance: Rolling Meadow Footbridge is one of a series of eight footbridges built in Rock Creek Park during the Depression, of which Rapids Footbridge (HAER No. DC-14) is the most notable. All these bridge... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More
Sixteenth Street Bridge, Spanning Piney Branch Parkway, Washington, Di...
Significance: This bridge was the first parabolic arch constructed in the United States. Its concrete masonry, faced with sandstone and pebble aggregate, conforms with the model for park crossings established ... More