ARGENTINA

Sustainable Development of the Matanza-Riachuelo basin: Lot 1 - Riachuelo Left Margin Collector

Owner/Client:

AySA (Agua y Saneamientos Argentinos S.A.)

Cost of works:

€ 320 million

Period of Activity:

2014 - 2019

The "Project for the Sustainable Development of the Matanza-Riachuelo basin", conceived to recover the Riachuelo River and the surrounding areas from an environmental point of view is the most ambitious sanitation project in Buenos Aires. The project is divided into several Lots, out of which 3 are interdependent and connected each to the others. Lot 1, the "Riachuelo Left Margin Collector", intercepts both industrial and civil discharged waters and prevent them to enter the Riachuelo River by diverting them towards a pre-treatment system. Lot 2, "the Plant for Water Pretreatment", located on the banks of the Río de la Plata River, on the right of the confluence of the Riachuelo River in the "Dock South" area, is intended to treat wastewaters physically. Lot 3 is "The Riachuelo Sewage Pipe Plant” that collects pretreated water and discharges it into the estuary of the Río de la Plata River at a distance of about 10km from the coast.

— Project Description:

The project involves the following works: - Left Margin Collector 1: a collector of approximately 1700m of length with a diameter of 1110mm, executed by Pipe Jacking. - Left Margin Collector 2: a collector of approximately 9500m of length with a diameter of 2900mm executed by Pipe Jacking. - Low waterfront collector for water deviation: a collector of approximately 5500m of length with a diameter of 4500mm executed by EPB-TBM. - 100 shafts (approximate diameter of 6m). - 1 shaft with a diameter of 12m for the both entry and exit of the EPB-TBM. - 1 shaft with a diameter of 45m for the recovery of the EPB-TBM. This shaft, once the project will be in operation, will host the system for water purification. - Complementary works – water transfer channels with a diameter of 1100mm for a total length of approx. 15,400m executed by Pipe Jacking. - Complementary works – water transfer channels with a diameter of 2900mm for a total length of approx. 687m executed using traditional techniques.

— Description of Services:

Review and approval of the detailed design; Supervision and construction management; quality control; health and safety coordination during construction; control of environmental protection during construction.

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