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Alcantarilla Dam

The Alcantarilla Dam is an ancient Roman gravity dam built to supply water to the Roman city of Toletum, in the Roman province of Hispania Tarraconensis. It was constructed in the 2nd century BC on a tributary of the Tagus River. Currently in ruins, it is located between the towns of Sonseca and Mazarambroz (Toledo). It is believed to be the oldest dam in Spain and possibly the oldest known Roman dam.

Structure
The structure appears to have been similar to the surviving Proserpina Dam near Merida, an earth dam with a stone retaining wall. The upstream retaining wall consists of two parallel rubble-masonry walls about thick, separated by a concrete-filled space approximately wide. The upstream side of the wall was faced with cut stone blocks. ==Conservation==
Conservation
The structure has been in ruins for a long time. There has been speculation that it was not strong enough to cope with a large volume of water. It was possibly breached in the Roman era. Another possibility is that the masonry collapsed upstream, perhaps by the pressure of the earth fill when the water was low, since, unlike later dams, it was not buttressed on the upstream side. == See also ==
Source: Wikipedia ↗
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