|UNESCO World Heritage Site|
|Official name||Sewell Mining Town|
|Location||Machalí, Cachapoal Province, O'Higgins Region, Chile|
|Inscription||2006 (30th Session)|
|Area||17.2 ha (43 acres)|
|Buffer zone||33 ha (82 acres)|
Sewell is an uninhabited Chilean mining town located on the slopes of the Andes in the commune of Machalí in Cachapoal Province, Libertador General Bernardo O'Higgins Region, at an altitude of between 2,000 and 2,250 metres.
During the Great Depression, the Braden Copper Company became a subsidiary of Kennecott Copper Company. In 1917 the foundry or smelter was moved from Sewell to Caletones, which soon also developed a town around it.
Originally male workers lived in shared housing called colectivos. Later family housing was added. Playgrounds, plazas, shops, and a movie theatre later followed. Pedestrians walked up and down vertical staircases. There were unpaved horizontal streets, and no cars. On the west facing side of Cerro Negro a camp for foreign personnel developed.
Ore was taken down the mountainside to Graneros where it was loaded onto railway cars. The narrow gauge railway that connected Sewell to the nearby town of Rancagua began in 1906 and was completed in 1911. Total distance covered was 45 miles with an elevation change of 5,000 feet.:144–145
By 1915 Sewell had a hospital, a fire department and a social club.:126 The buildings and homes were made out of timber, and painted bright colors such as yellow, red and blue. At its peak in 1960, it had more than 16,000 inhabitants. By 1918 the town housed more than 12,000 people.:146
Sewell is known as the "City of Staircases". The town was built on terrain too steep for wheeled vehicles, around a large central staircase rising from the railway station called the Escalara Central. All supplies had to be brought into the city via a narrow gauge railroad. Pueblo Hundido contained the living quarters while below the ore body was El Establecimiento contained the concentrator, hydroelectric plant, and a tramway.:127,146
On 8 August 1944, 102 people died in an avalanche when the slopes above the town failed,:128 and in June 1945, 355 workers died through smoke inhalation in a fire. This led to the development of more safety regulations.:128 Additional, ever-present threats to the city included earthquakes, avalanches and explosions.
In 1967 the Kennecott Copper Company relinquished its sole ownership of the site with the purchase by the Chilean government of a 51% stake in the company. At this time, most people were moved to Rancagua and the Copper Highway was built for commuting purposes.
In 1971 the mine was nationalised by the Allende government, and in 1977, after over seven decades of active life, and having supported the construction and exploitation of the largest underground mine in the world, the state-owned CODELCO (Corporación Nacional del Cobre de Chile) started moving families out of Sewell into the valley, and the demolition of buildings began.
CODELCO uses several buildings for offices, but only the basic facilities required for mining remain. It is not possible to access the area with private vehicles and only tour operators in Santiago and Rancagua are allowed to visit the site.
- Charles Caldwell Hawley (2014). A Kennecott Story. The University of Utah Press. p. 105.
- Sewell, also known as El Teniente, Chile
- "Archived copy". Archived from the original on 2006-04-19. Retrieved 2006-07-01.CS1 maint: archived copy as title (link)
- "Sewell Mining Town". UNESCO. Retrieved 2012-12-30.
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