Shoshone Falls Hydroelectric Project, Tunnel and Penstock, North Bank ...
Significance: The concrete-lined tunnel was among the first, if not the first, permanent components of the Shoshone Falls Project. Begun in 1901, it took more than three years and several changes of ownership b... More
Childs-Irving Hydroelectric Project, Childs System, Flume Tunnel No. 2...
Survey number: HAER AZ-65-L Building/structure dates: 1908 Initial Construction
SA Tower, Between State Route 2006 & West portal of Sand Patch Tunnel,...
Significance: Completed about 1912, the SA tower controls retains its original switching and signaling equipment, including its hydraulic switching rods that run alongside the tracks to the track's two double c... More
Frisco Tunnel, Walker County Road 81, Dora, Walker County, AL
Survey number: HAER AL-24 Public domain photograph of the train tunnel, railroad, train track, free to use, no copyright restrictions image - Picryl description
East Side Highway Tunnel, Through mountain spur on East Side Highway, ...
Survey number: HAER WA-75 Building/structure dates: 1939 Initial Construction National Register of Historic Places NRIS Number: 97000344
Central Pacific Transcontinental Railroad, Tunnel No. 4, Milepost 180....
Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More
Baltimore & Ohio Railroad, Ilchester Tunnel, East side of Patapsco Riv...
Survey number: HAER MD-21 Public domain photograph of the train tunnel, railroad, train track, free to use, no copyright restrictions image - Picryl description
Nevada Test Site, Test Cell A Facility, Tunnel, Area 25, Jackass Flats...
Survey number: HAER NV-33-B Public domain photograph of the train tunnel, railroad, train track, free to use, no copyright restrictions image - Picryl description
Central Pacific Railroad, Clipper Gap Tunnel, Clipper Gap, Placer Coun...
Survey number: HAER CA-30 Building/structure dates: ca. 1875 Initial Construction
Historic Columbia River Highway, Oneonta Tunnel, Adjacent to Historic ...
Significance: One of four tunnels on the Historic Columbia River Highway. Survey number: HAER OR-36-L Building/structure dates: 1914 Initial Construction Building/structure dates: 1948 Subsequent Work Build... More
Central Pacific Transcontinental Railroad, Tunnel No. 3, Milepost 180....
Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More
Childs-Irving Hydroelectric Project, Childs System, Flume Tunnel No. 3...
Unprocessed Field note material exists for this structure: N1036 Survey number: HAER AZ-65-T Building/structure dates: 1908 Initial Construction
Montezuma Valley Irrigation Company System, Tunnel Diversion Site, Dol...
Survey number: HAER CO-4-B Building/structure dates: ca. 1885 Initial Construction
Childs-Irving Hydroelectric Project, Irving System, Flume Tunnel No. 1...
Survey number: HAER AZ-65-C Building/structure dates: 1915 Initial Construction
Los Angeles Aqueduct, Tunnel Interior, Los Angeles, Los Angeles County...
Survey number: HAER CA-298-AG Public domain photograph of the train tunnel, railroad, train track, free to use, no copyright restrictions image - Picryl description
Merritt Parkway, Metro North Railroad Bridge, Spanning Metro North Rai...
Significance: The bridges of the Merritt Parkway were predominately inspired by the Art Deco and Art Moderne architectural style of the 1930s. Experimental forming techniques were employed to create the orname... More
Sand Patch Tunnel, Northeast of State Route 2006, Sand Patch, Somerset...
Significance: The Sand Patch Tunnel now used by CSX is the second railroad tunnel constructed through Negro Mountain at Sand Patch. The first tunnel, began in 1854 and completed in 1871, marked the original ro... More
East Side Tunnel, Through Piegan Mountain at Going-to-the-Sun Road, We...
Significance: The East Side Tunnel is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is significa... More
Childs-Irving Hydroelectric Project, Childs System, Flume Tunnel No. 5...
Survey number: HAER AZ-65-W Building/structure dates: 1908 Initial Construction
Route 31 Bridge, New Jersey Route 31, crossing disused main line of Ce...
Significance: The bridge was built with Route 31 (originally Highway 30) as part of the highway expansion program undertaken by the state during 1923-1742. It is a three-span example of the concrete-encased st... More
Route 31 Bridge, New Jersey Route 31, crossing disused main line of Ce...
Significance: The bridge was built with Route 31 (originally Highway 30) as part of the highway expansion program undertaken by the state during 1923-1742. It is a three-span example of the concrete-encased st... More
Route 31 Bridge, New Jersey Route 31, crossing disused main line of Ce...
Significance: The bridge was built with Route 31 (originally Highway 30) as part of the highway expansion program undertaken by the state during 1923-1742. It is a three-span example of the concrete-encased st... More
San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...
Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More
San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Fran...
Significance: The San Francisco-Oakland Bay Bridge is one of the most impressive engineering structures in the United States. It is also one of the most important transportation links in the United States, ser... More
Wright's Bridge, Spanning Sugar River, former Boston & Maine Railroad ...
Significance: One of only eight remaining covered railroad bridges in the country. Wright's Bridge is structurally the most interesting of the four existing bridges built while Jonathan Parker Snow was bridge ... More
Wright's Bridge, Spanning Sugar River, former Boston & Maine Railroad ...
Significance: One of only eight remaining covered railroad bridges in the country. Wright's Bridge is structurally the most interesting of the four existing bridges built while Jonathan Parker Snow was bridge ... More
Promenade Street Bridge, Spanning Woonasquatucket & Moshassuck Rivers,...
Significance: The bridge is historically significant as part of the station and East Side Tunnel viaduct which contributed to the regional rail transportation network. Unique construction techniques make the s... More
Pennsylvania Railroad, Delaware River Bridge, Spanning Delaware River,...
Significance: The crossing is a critical link in the railroad route from Philadelphia to New York, and has hosted a series of bridges dating back to 1806. The current bridge is one of the Pennsylvania Railroad'... More
Big Oak Flat Road Tunnel No. 3, Through mountain spur on New Big Oak F...
part of Yosemite Roads and Bridges Recording Project, 1991; see HAER No. CA-117 for overview Unprocessed Field note material exists for this structure: N77 Unprocessed Field note material exists for this struc... More
Big Oak Flat Road Tunnel No. 3, Through mountain spur on New Big Oak F...
part of Yosemite Roads and Bridges Recording Project, 1991; see HAER No. CA-117 for overview Unprocessed Field note material exists for this structure: N77 Unprocessed Field note material exists for this struc... More
Big Oak Flat Road Tunnel No. 3, Through mountain spur on New Big Oak F...
part of Yosemite Roads and Bridges Recording Project, 1991; see HAER No. CA-117 for overview Unprocessed Field note material exists for this structure: N77 Unprocessed Field note material exists for this struc... More
Erie Railway, Dayton Tunnel, Allen Street Vicinity, Dayton, Cattaraugu...
Unprocessed Field note material exists for this structure: N1384 Survey number: HAER NY-46
Erie Railway, Dayton Tunnel, Allen Street Vicinity, Dayton, Cattaraugu...
Unprocessed Field note material exists for this structure: N1384 Survey number: HAER NY-46
Southern Pacific Railroad Natron Cutoff, Tunnel No. 18, Milepost 410, ...
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
Southern Pacific Railroad Natron Cutoff, Tunnel No. 18, Milepost 410, ...
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
Southern Pacific Railroad Natron Cutoff, Tunnel No. 18, Milepost 410, ...
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
Southern Pacific Railroad Natron Cutoff, Tunnel No. 18, Milepost 410, ...
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
Southern Pacific Railroad Natron Cutoff, Tunnel No. 18, Milepost 410, ...
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
Southern Pacific Railroad Natron Cutoff, Tunnel No. 18, Milepost 410, ...
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
Southern Pacific Railroad Natron Cutoff, Tunnel No. 18, Milepost 410, ...
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
Central Pacific Transcontinental Railroad, Tunnel No. 23, Milepost 132...
Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More
Central Pacific Transcontinental Railroad, Tunnel No. 23, Milepost 132...
Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More
Central Pacific Transcontinental Railroad, Tunnel No. 23, Milepost 132...
Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More
Central Pacific Transcontinental Railroad, Tunnel No. 23, Milepost 132...
Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...
Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Board Tree Tunnel, Littleton, Wetzel County, WV
Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More
Boston & Maine Railroad, Essex Street Bridge, Spanning Boston & Maine ...
Significance: The Boston & Maine Railroad built wood and iron truss bridges into the twentieth century, long after most other railroads had switched to all-metal bridges. The Essex Street Bridge is representat... More
Boston & Maine Railroad, Essex Street Bridge, Spanning Boston & Maine ...
Significance: The Boston & Maine Railroad built wood and iron truss bridges into the twentieth century, long after most other railroads had switched to all-metal bridges. The Essex Street Bridge is representat... More
Silver King Mining Company, Ore Loading Station, Park Avenue, Park Cit...
Significance: One problem encountered by the Silver King Mining Company was the transportation of its ore over the rough terrain between the mine and the railhead in Park City. The solution was a 7,000' long ae... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More
Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...
Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More