Sitka is a unified city-borough in the southeast portion of the U.S. state of Alaska. It was under Russian rule from 1799 to 1867. The city is situated on the west side of Baranof Island and the south half of Chichagof Island in the Alexander Archipelago of the Pacific Ocean. As of the 2020 census, Sitka had a population of 8,458, the fifth-most populated city in the state.
The Miles Glacier Bridge, also known as the Million Dollar Bridge, was built in the early 1900s across the Copper River fifty miles from Cordova in what is now the U.S. state of Alaska. It is a multiple-span Pennsylvania truss bridge which completed a 196-mile (315 km) railroad line for the Copper River and Northwestern Railway, built by J. P. Morgan and the Guggenheim family to haul copper from the old mining town of Kennicott, now located within the Wrangell–St. Elias National Park and Preserve, to the port of Cordova. It earned its nickname because of its $1.4 million cost, well recouped by the about $200 million worth of copper ore which was shipped as a result of its construction.
The Allegheny Portage Railroad was the first railroad constructed through the Allegheny Mountains in central Pennsylvania. It operated from 1834 to 1854 as the first transportation infrastructure through the gaps of the Allegheny that connected the midwest to the eastern seaboard across the barrier range of the Allegheny Front. Approximately 36 miles (58 km) long overall, both ends connected to the Pennsylvania Canal, and the system was primarily used as a portage railway, hauling river boats and barges over the divide between the Ohio and the Susquehanna Rivers. Today, the remains of the railroad are preserved within the Allegheny Portage Railroad National Historic Site operated by the National Park Service.
Japonski Island is a small island in the city of Sitka in the Alexander Archipelago of southeastern Alaska, United States. It lies across the Sitka Channel from Sitka's central business district.
Going-to-the-Sun Road is a scenic mountain road in the Rocky Mountains of the western United States, in Glacier National Park in Montana. The Sun Road, as it is sometimes abbreviated in National Park Service documents, is the only road that traverses the park, crossing the Continental Divide through Logan Pass at an elevation of 6,646 feet (2,026 m), which is the highest point on the road. Construction began in 1921 and was completed in 1932 with formal dedication in the following summer on July 15, 1933. Prior to the construction of the road, visitors would need to spend several days traveling through the central part of the park, an area which can now be traversed within a few hours, excluding any stops for sightseeing or construction.
Sitka National Historical Park is a national historical park in Sitka in the U.S. state of Alaska. It was redesignated as a national historical park from its previous status as national monument on October 18, 1972. The park in its various forms has sought to commemorate the Tlingit and Russian experiences in Alaska.
The Croton Aqueduct or Old Croton Aqueduct was a large and complex water distribution system constructed for New York City between 1837 and 1842. The great aqueducts, which were among the first in the United States, carried water by gravity 41 miles (66 km) from the Croton River in Westchester County to reservoirs in Manhattan. It was built because local water resources had become polluted and inadequate for the growing population of the city. Although the aqueduct was largely superseded by the New Croton Aqueduct, which was built in 1890, the Old Croton Aqueduct remained in service until 1955.
The Roberto Clemente Bridge, also known as the Sixth Street Bridge, spans the Allegheny River in downtown Pittsburgh, Pennsylvania, United States.
The Bidwell Bar Bridge, in Oroville, California, is the name of two suspension bridges that cross different parts of Lake Oroville. The original Bidwell Bar Bridge was the first steel suspension bridge in California. The $35,000, 240-foot-long (73 m) original was completed in December 1855, and was built of materials transported from Troy, New York, via Cape Horn. Most of the money was put up by Judge Joseph Lewis, a Virginian who moved to Bidwell's Bar in 1849. The bridge originally crossed the Middle Fork Feather River and is the only one of several suspension bridges built in the area in the 1850s that still remains. It remained open to vehicle traffic until 1954.
The Frisco Bridge, previously known as the Memphis Bridge, is a cantilevered through truss bridge carrying a rail line across the Mississippi River between West Memphis, Arkansas, and Memphis, Tennessee.
The White Alice Communications System was a United States Air Force telecommunication network with 80 radio stations constructed in Alaska during the Cold War. It used tropospheric scatter for over-the-horizon links and microwave relay for shorter line-of-sight links. Sites were characterized by large parabolic, tropospheric scatter antennas as well as smaller microwave dishes for point-to-point links.
The Patterson Viaduct was built by the Baltimore and Ohio Railroad (B&O) as part of its Old Main Line during May to December 1829. The viaduct spanned the Patapsco River at Ilchester, Maryland. It was heavily damaged by a flood in 1868 and subsequently replaced with other structures.
The Frankford Avenue Bridge, also known as the Pennypack Creek Bridge, the Pennypack Bridge, the Holmesburg Bridge, and the King's Highway Bridge, erected in 1697 in the Holmesburg section of Northeast Philadelphia, in the U.S. state of Pennsylvania, is the oldest surviving roadway bridge in the United States. The three-span, 73-foot-long (22 m) twin stone arch bridge carries Frankford Avenue, just north of Solly Avenue, over Pennypack Creek in Pennypack Park.
The Bridges of Keeseville consist of three historic bridges located in Keeseville, New York, spanning the Ausable River. These bridges include a stone arch bridge constructed in 1843, a wrought iron Pratt truss bridge (1878) and a twisted wire cable suspension footbridge built in 1888. These three bridges represent the evolution of 19th-century bridge design, and together were designated a National Historic Civil Engineering Landmark by the American Society of Civil Engineers in 1987.
The Zion – Mount Carmel Highway is a 25-mile (40 km) long road in Washington and Kane counties in southern Utah, United States, that is listed on the National Register of Historic Places and is a National Historic Civil Engineering Landmark.
The Fink-Type Truss Bridge, also known as the Hamden Bridge, carried Hamden Road/River Road over the South Branch Raritan River, the border between Clinton Township and Franklin Township, at Hamden near the Allerton section of Hunterdon County, New Jersey. The bridge was built in 1857 by the Trenton Locomotive and Machine Manufacturing Company. It consisted of a single-span through truss 100 feet (30 m) long, 15 feet (4.6 m) wide, and 19 feet (5.8 m) high.
Bridge in Brown Township is a historic lattice truss bridge spanning Pine Creek at PA 414 in Brown Township, Lycoming County, Pennsylvania. It was built in 1890, by the Berlin Iron Bridge Co. of East Berlin, Connecticut. The bridge measures 227 feet (69 m) long and 19 feet (5.8 m) wide.
The Black Suspension Bridge spans the Colorado River in the inner canyon of Grand Canyon National Park. The span length is 440 feet (130 m). The bridge is part of the South Kaibab Trail and is the river crossing used by mules going to Phantom Ranch. The Black Bridge and Silver Bridge, located about 700 metres (2,300 ft) downstream, are the only spans in hundreds of river miles.
The New Portland Wire Bridge is a historic suspension bridge in New Portland, Maine. The bridge carries Wire Bridge Road across the Carrabassett River a short way north of the village center. Built in the mid-19th century, it is one of four 19th-century suspension bridges in the state. It is one lane wide, and has a weight limit of 3 tons. The bridge was listed on the National Register of Historic Places in 1970 and was designated as a Maine Historic Civil Engineering Landmark by the American Society of Civil Engineers in 1990.
