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TEDAGUA has been awarded the contract for the Pontevedra water supply project

TEDAGUA has been awarded the contract for the Pontevedra water supply project

The board of directors of the state-owned company Aguas de las Cuencas del Norte, S.A., (AcuaNorte), awarded the "Drafting of the Design and Implementation of the Project for the New Water Supply for Pontevedra and its Estuary (Right Bank)" to the joint venture formed by TEDAGUA and Vías y Construcciones (both in the ACS Group) at their meeting held on 27 September. The project, declared of general state interest, has a total contract budget of €18,562,251.43 and a completion period of 27 and a half months.

 

The current Pontevedra system supplies drinking water to the municipalities of Pontevedra, Poio and Sanxenxo, among others. However, due to this area's terrain, many rural population centres located in the highest parts of the municipalities are supplied directly by springs rather than by this general system, whose existing storage tanks are on lower levels. In addition, given that the area is subject to major seasonal variations, with a significant rise in the population in the summer months, the current system finds it difficult to meet demand on some days in the summer.

 

Thanks to the finance agreement signed between AcuaNorte and the councils of Pontevedra, Poio and Sanxenxo, and the recently awarded works contract, the 120,000 inhabitants of all these localities will see both problems solved and a guaranteed water supply every day of the year for all of their population centres.

 

The works to be performed can be summarised as follows:

  • Pipes. A total of 10,300 metres of pipework is planned, all made of ductile cast iron, to link various storage tanks and pumping stations, the Pontillón reservoir, and the Lérez drinking water treatment plant.
  • Renewal of the Poio and Sanxenxo trunk mains. The majority of the route of the Poio trunk main is in an urban area with a high level of traffic, and the pipe to be renewed is near the pipes of other services. Consequently, the use of various pipe restoration techniques without the need for trenches is planned to avoid any possible inconvenience to residents. In the Sanxenxo trunk main, the current fibre cement pipe will be replaced by a new ductile cast iron pipe with a nominal diameter of 500 millimetres.
  • Storage tanks and pumping stations. Four new reinforced concrete storage tanks will be constructed for treated water in the localities of Lérez, Dorrón, Morrente and Buezas, with a total storage capacity of 25,000 m3. There are also plans to construct three new pumping stations, and to expand the Monteporreiro station, as well as their associated electrical connections.
  • Expansion of Lérez DWTP. The “New Water Supply for Pontevedra and its Estuary” project plans include the expansion of the current capacity of the Drinking Water Treatment Plant (DWTP) to 1,300 l/s. The first expansion of the DWTP, on which this project is focussed, will bring the capacity up to 1,000 l/s (86,400 m3/day). The DWTP water will come from the Pontillón de Castro reservoir, and the River Lérez. Given that the quality of this water is good, the treatment process is highly conventional, consisting of physical and chemical treatment, separation of solids, filtration and disinfection.

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