1869 Eastman tunnel collapse near Saint Anthony Falls
Location
Minneapolis, Minnesota
Built
1868 started
Built by
W. W. Eastman
Part of
St. Anthony Falls Historic District (ID71000438)
The Eastman tunnel, also called the Hennepin Island tunnel, was a 2,000-foot-long (610 m) underground passage in Saint Anthony, Minnesota, (now Minneapolis) dug beneath the Mississippi River riverbed between 1868 and 1869 to create a tailrace so water-powered business could be located upstream of Saint Anthony Falls on Nicollet Island. The tunnel ran downstream from Nicollet Island, beneath Hennepin Island, and exited below Saint Anthony Falls.
During construction of the tunnel on October 5, 1869, the river broke through the thin layer of limestone separating the river's bed from the tunnel. The rushing river scoured the tunnel, caving in parts of Hennepin Island and causing the earth supporting Saint Anthony Falls to collapse upstream. There was serious concern that the riverbed would crumble and reduce Saint Anthony Falls to a long set of rapids. Within a few weeks, dams were built to divert the river and stop Saint Anthony Falls from being washed away. The fix was temporary as the 1870 spring floods damaged some of the new dams and swept away more of Hennepin Island. The final fix for the tunnel disaster was a concrete dike constructed by the United States Army Corps of Engineers. The Corps also built a protective sloping wood timber apron to create an artificial waterfall which remains the only major waterfall on the Mississippi River.
The Eastman tunnel is a contributing resource to the St. Anthony Falls Historic District. The District is on the National Register of Historic Places
[1]
The site of the tunnel is about a mile upstream from site of the I-35W Mississippi River bridge that collapsed in 2007.
The Eastmantunnel, also called the Hennepin Island tunnel, was a 2,000-foot-long (610 m) underground passage in Saint Anthony, Minnesota, (now Minneapolis)...
competition over the power of the falls on both banks of the river led to the Eastmantunnel disaster in 1869 which could have destroyed the falls. The disaster...
under runway 8/26 at West Michigan Regional Airport Eastmantunnel, defunct water tunnel; the tunnel ran downstream from Nicollet Island, beneath Hennepin...
into a rapids that would no longer provide water power. The Eastmantunnel was a tailrace tunnel being excavated in the sandstone from below the falls, under...
Weyerhauser mill closed by 1919. Dug under the river at Nicollet Island, the Eastmantunnel leaked in 1869. Water sucked the 6 ft (1.8 m) tailrace into a 90 ft...
Saxby Gale devastates the Bay of Fundy region in Canada. 1869 – The Eastmantunnel, in Minnesota, United States, collapses during construction, causing...
aerodynamics, dealing particularly with wind tunnels, airfoils, turbulence, boundary layers, and Schlieren photography. Eastman Jacobs joined NACA in 1925 after earning...
2 km) of the route through downtown were constructed in a cut-and-cover tunnel that became Broad Street, and the only underground portion of the subway...
been taken over by Paul Eastman, when he was trying to kill Tom. Melinda then finds out Tom actually is not her father, Paul Eastman is. After discovering...
display on the Langley grounds. Wind tunnels Reynolds number Fluid dynamics NACA Langley Research Center Max Munk Eastman Jacobs List of National Historic...
10,000 prisoners. According to Eastman's calculations, the camp could hold only half that properly. In addition, Eastman reported that the kitchens could...
2-story bay-windows overlooking both the Charles River to the south and Eastman Court to the north, as well as high ceilings in the library spaces. In...
72 at 1 μm and the Abbe number is 53.58. It is sometimes known by the Eastman Kodak trademarked name Irtran-5, although this designation is obsolete...
Bartlett Robinson as Donald Wellman, David Lewis as Ed Boling, Carole Eastman as Marjorie 'Marge' Rogers, Jo Helton as Secretary, Raven Grey Eagle as...
Items appraised include a World War II impact detonation grenade made by Eastman Kodak for the Office of Strategic Services, which was bought for $5 by...
executed, along with Everett Applegate, in 1936. Monk Eastman, New York gangster and leader of the Eastman Gang, was sentenced to 10 years at Sing Sing in 1904...
annually, often severely. Eastman also stated that the overwintering storage capacity of stock thus treated was much improved (Eastman 1980). The concentrations...
Akiko Meyers; Gustavo Dudamel, conductor; Dmitriy Lipay, producer Julius Eastman, Vol. 3: If You're So Smart, Why Aren't You Rich? Christopher Rountree...
"John" Vitale, boss of the Detroit Mafia December 26 – Monk Eastman (Edward Osterman), Eastman Gang founder Upon his January 1921 election as Governor of...
direct contact with the tongue and oral mucosa due to the intraoral tube. Eastman Kodak filed the first patent for digital radiography in 1973. The first...
the man in the mask is Paul Eastman, and Melinda's biological father (Melinda awoke Paul's ghost when searching in the tunnels). In disbelief, Melinda goes...
Global Information