Rocscience Inc.'s Technical Workshop: Finite Element Modelling of Underground Excavations begins on Aug 26th 2026
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On This Day | October 20

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2011
Namma Metro opened

Namma Metro, also known as Bengaluru Metro, is a rapid transit system serving the city of Bengaluru, India. It is the second longest operational metro network in India after Delhi Metro. Upon its inauguration, it became the first underground metro system in South India. Namma Metro has a mix of underground, at grade, and elevated stations. Out of the operational 64 metro stations of Namma Metro as of March 2023, there are 55 elevated stations, 8 underground stations and 1 at-grade station. The system runs on standard-gauge tracks.

1982
Tous Dam failure

Tous is a municipality in the Valencian Community, in the province of Valencia. The town is notable for the dam failure which occurred in 1982, when an unusually severe rainfall swelled the river Jucar, breaking the Tous Dam. The dam operator was unable to open the spillway gate, and the water overtopped the dam, which then failed, provoking a flood of 16,000 m3/s and more than 30 casualties. The flood was called La Pantanada.

1973
Sydney Opera House opened

The Sydney Opera House is a multi-venue performing arts centre in Sydney, Australia. Located on the foreshore of Sydney Harbour, it is widely regarded as one of the world's most famous and distinctive buildings and a masterpiece of 20th-century architecture.

1964
Herbert Hoover died

Herbert Clark Hoover was an American politician who served as the 31st president of the United States from 1929 to 1933. He was a member of the Republican Party, holding office during the onset of the Great Depression in the United States. A self-made man who became rich as a mining engineer, Hoover led the Commission for Relief in Belgium, served as the director of the U.S. Food Administration, and served as the U.S. Secretary of Commerce. Hoover has been memorialized in the names of several things, including the Hoover Dam on the Colorado River.

1923
Gaylord Family Oklahoma Memorial Stadium opened

Gaylord Family Oklahoma Memorial Stadium, also known as Owen Field or The Palace on the Prairie, is the football stadium on the campus of the University of Oklahoma in Norman, Oklahoma. It serves as the home of the Oklahoma Sooners football team. The official seating capacity of the stadium, following renovations before the start of the 2019 season, is 86,112, making it the 22nd largest stadium in the world, the 13th largest college stadium in the United States and the second largest in the Big 12 Conference, behind Darrell K Royal-Texas Memorial Stadium at the University of Texas at Austin.

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Reinforcement and Stabilization Mechanisms

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