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Stevens Pass Railroad Tunnels & Switchback System
Society: ASCEMain Category: CivilSub Category: Rail TransportationEra: 1900-1909DateCreated: 1900Stevens PassState: WAZip: 98826Country: USAWebsite: http://www.asce.org/project/stevens-pass-railroad-tunnels/Creator: Stevens, John F.

In the years following the Civil War, the land west of the Mississippi River was being settled and the Pacific Northwest explored. There remained, however, a large portion of Montana, Idaho, and Washington that contained enormous quantities of timber and minerals, but was not accessible by rail. By far the most grueling stretch was the Stevens Pass area in the Cascade Mountains.

YearAdded:
1993
Image Credit: Courtesy Wikipedia/SeattleretroImage Caption: Railroad development in Stevens Pass made accessible a timber and mineral rich region of Montana, Idaho, and Washington.Era_date_from: 1900
Hudson and Manhattan Railroad Tunnel
Society: ASCEMain Category: CivilSub Category: NuclearEra: 1900-1909DateCreated: 1908Hudson RiverNew York City to Hoboken State: NYCountry: USAWebsite: http://www.asce.org/project/hudson-and-manhattan-rr-tunnel/Creator: Haskin, DeWitt Clinton, McAdoo, William G.

A transportation tunnel under the Hudson River connecting Manhattan and New Jersey was first considered in the 1860s, fueled by New York City's rapidly growing congestion and the inadequacy of existing ferry service to population centers across the river. DeWitt Clinton Haskin, an engineer formerly with the Union Pacific Railroad, started the project in 1874 and subsequently endured an extended lawsuit, several failures of the tunnel wall, and an exhaustion of funds before quitting in 1887 with only 1,600 feet completed. 

YearAdded:
1978
Image Credit: Courtesy ascemetsection.orgImage Caption: The Hudson and Manhattan tunnel was the first large transportation tunnel constructed under a major river in the United States..Era_date_from: 1908
Hoosac Tunnel
Society: ASCEMain Category: CivilSub Category: Rail TransportationEra: 1850-1859DateCreated: 1855-1876North AdamsState: MAZip: 10013Country: USAWebsite: http://www.asce.org/Project/Hoosac-Tunnel/Creator: Shanley, Walter and Francis

When first proposed in 1819, the Hoosac Tunnel seemed so logical. It would provide an efficient and direct route for the Boston and Albany Railroad, whose pathway meandered 20 miles along precipitous grades. Early proponents, however, could not have imagined that blasting a 4.75 mile tunnel through the Hoosac Mountain would require over 20 years of labor. The project took so long to complete that it was commonly referred to as "The Great Bore." 

YearAdded:
1975
Image Credit: Courtesy Wikipedia/Acela2038 Image Caption: The 4.75 mile Hoosac tunnel, which was bored through the Hoosac Mountain, required over 20 years of labor.Era_date_from: 1855
Thames Tunnel
Society: ASCEMain Category: CivilSub Category: TunnelsEra: 1840-1849DateCreated: 1843Beneath the Thames RiverLondonCountry: UKWebsite: http://www.asce.org/Project/Thames-Tunnel/Creator: Brunel, Marc Isambard , Brunel, Isambard Kingdom

By the turn of the 19th century, London's streets were clogged with traffic. Over 3,700 passengers used the Thames River's main boat crossing each day, while wagons and carts were forced to cross via the London Bridge, two miles away. Building a bridge would further impede shipping on the already-crowded Thames; a tunnel was the obvious alternative.

The first attempt at a tunnel in the present location began in 1807. The excavation had proceeded only 1,000 feet-using traditional mining methods-when crews reached a layer of quicksand and were forced to stop.

YearAdded:
1991
Image Credit: Courtesy Flickr/Annie Mole (CC BY 2.0)Image Caption: Thames TunnelEra_date_from: 1843
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