Construction Of A Structure For Filtration, Discharge Manholes And Flow Measurement. Secondary Works. Earthworks And Evacuation: 30,000 M3 Secant Piles: 3,000 Ml Dn 1000 Grp Pipeline: 200 Ml Dn 400 Reinforced Concrete Driving: 35 Ml Reinforced Concrete: 2,500 M3