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The storm water regulation tank in Urgell - Mallorca allows you to temporarily hold the incoming water and drain it in a controlled way to the sewage treatment plant, reducing:

The periodic floods suffered on Calle Urgell, Avenida Roma, Avenida Paral·lel and El Raval, as a result of the insufficient crossings of the sewerage at the intersection with the railway tunnels that connect the station of Sants with the city center. This insufficiency is aggravated by the surface runoff that leads to Calle Urgell generated by the hydraulic failure of the Avenida Diagonal network.
Pollutant spills in rainy weather on the beaches and the Port.

The tank has a single body, of about 16,000m3, which is pumped out by pumping, except the upper 3,000m3 that is drained by gravity. In the event of an overflow of the tank, there is an emergency spill in the pumping body, which discharges the water directly to the collector attached to the reservoir on the Besòs side.

In addition to the works on the deposit itself, other ancillary works have been performed:

A bypass collector, attached to the reservoir on the Besòs side.
An entrance chamber, which receives the water from the Urgell collector.
Watershed tank, attached to the entrance room where the water of the water table is stored for cleaning the tank
A 500mm diameter circular section collector that can be used to collect the sewers of buildings in this band.

Internally, the tank is divided into 3 cleaning lanes parallel to the larger dimension. These lanes drain into another perpendicular collection lane, which concentrates the water to the pump well.
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