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A deposit located in the basement of the Parc de l'Escorxador, attached to the wall of the sidewalk of Tarragona Street between the sculpture area of ​​Joan Miró and Carrer Diputació. Hydrologically, the work is located in the so-called Conca de la Zona Franca, at the point of concentration of the sloping area of ​​Numancia-Tarragona, which is also the bifurcation point towards the axis of Gran Via - Zona Franca or Diputació - Old City. The tank has a total capacity of 70,000 m3 and consists of two bodies: a deeper one, totally drained by gravity, and a deeper one, which has a part that can only be drained by pumping and another that can also be drained by gravity. The two bodies are separated by an interior spillway at height 19.70. In the event of an overflow of the tank, there are two emergency spillways, at a level of 20.70. One pours the water to the Tarragona collector behind the exit gates, and another to the Diputació manifold. In addition to the works on the deposit itself, two other ancillary works have been planned:
The inlet manifolds, which are the two bypass collectors towards Diputació Street, have their origin in the Tarragona gate chamber. These are intercepted once they have crossed the tunnel of Metro Line 3, and are remodeled by turning them to enter the depot, but leaving a by-pass of one of the two towards Diputació.
The operating regime of the Tarragona gateway chamber must be modified with respect to its current mode of operation in order to ensure that almost all of the flow is derived to Diputació instead of continuing to Tarragona.
The drain collector, which again returns the regulated water to the Tarragona trunk. This is done using a 60m collector, built in a mine with a 2.0x2.3m vaulted section except for the first 20m, which are precisely 2.75x1.75m rectangular section to cross under the inlet manifolds.

This deposit is visitable through the Program How Does Barcelona Work? by prior arrangement here.

Photography Rainwater Retention Retention Tank in the Joan Miró Park
Barcelona Water Cycle SA (BCASA)
Environment and Urban Services - Urban Ecology
city ​​Hall of Barcelona

Sewer section visitable Paseo San Juan
Barcelona Water Cycle SA (BCASA)
Environment and Urban Services - Urban Ecology
city ​​Hall of Barcelona

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