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The drainage pipeline under construction in the Río de la Compañía river in Mexico state (Edomex), will be completed in the first half of 2012, national water authority Conagua said in a release.
The pipeline is part of a wider 1.7bn-peso (US$145mn) project that includes the Río de la Compañía drainage tunnel and the La Caldera pumping station. The system will carry rain water and wastewater from the east of the Mexico valley.
Conagua started work on the pipeline in May following damage to the river bank and bed caused by subsidence and landslides.
During the dry season, the pipeline will channel 3.8m3/s of wastewater from Edomex municipalities and will provide additional drainage capacity for the Río de la Compañía drainage tunnel during the rainy season. The pipeline will also be used to drain the tunnel in the event of maintenance or inspection works.
The pipeline and other works are expected to reduce the risk of flooding in the Chalco, Valle de Chalco and Ixtapaluca residential areas.
During the current administration, Conagua has invested 60bn pesos in water infrastructure projects in the Mexico valley area.