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El Atazar Dam

Field	Value
name	El Atazar Dam
image	Presa de El Atazar - 01.jpg
image_size	300px
image_caption	The dam in 2014
location	Community of Madrid
coordinates
country	Spain
status	Completed
construction_began	1968
dam_height_foundation	134 m (440 ft)
dam_length	52.3 m (171.6 ft)
res_name	El Atazar Reservoir
res_capacity_total	426 hm3
res_surface	10.7 km²

El Atazar Dam is an arch dam built near Madrid, Spain on the Lozoya River, very close to where the Lozoya joins the Jarama. The curved design of the dam is optimum for the narrow gorge in which it was built to retain water in the reservoir. Arch dams are thin and require less material to construct than other dam types.{{cite web |url=https://www.pbs.org/wgbh/buildingbig/dam/basics.html#arch

When the dam was built, the decision was made to use the dam to store and regulate water only and not to provide energy. Construction started on the dam in 1968 and finished in 1972.

Design

The dam is 134 m (440 ft) high and 52.3 m (171.6 ft) wide at the foundation. The reservoir capacity is 424,000,000 m3 (344,000 acre feet). It is a double curvature concrete arch buttress design.{{cite web |url-status = dead

Problems

Monitoring of the dam revealed abnormal movement. Although dams normally move, the left side of the El Atazar Dam was moving more than the right because a support built on the dam's right made that side less flexible. In 1977 a crack was noticed in the dam. By 1979 the crack had grown to 46 m (150 ft) in length and was repaired. Inspection in 1983 revealed that the settling in the foundations and the movements of the dam had caused fracturing in the rock, resulting in significantly increasing the foundation's permeability. The crack has been treated and since then the problems have abated.{{cite web |url-status=live

Power plant

The dam supports a hydroelectric power plant with a nameplate capacity of 9,56 MW. Its annual generation lies between 18,66 (2012) and 44,49 (1998) GWh. The power station contains 2 Francis turbine-generators with 4,78 MW (5,4 MVA) each. The turbine rotation is 500 rpm. The hydraulic head is 56 m. Maximum flow per turbine is 8 m³/s.

Gallery

Image:Después del embalse del Atazar.jpg Image:El Atazar dam view01.jpg Image:El Atazar dam view06.jpg Image:El Atazar Aerial View.JPG

Notes

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

dams-in-spain hydroelectric-power-stations-in-spain arch-dams buildings-and-structures-in-the-community-of-madrid dams-completed-in-1972 reservoirs-in-the-community-of-madrid

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