ABSTRACT

The Angat Water Transmission Improvement Project (AWTIP) aims to improve the reliability of the raw water supply for Metro Manila through rehabilitation of the transmission system from Ipo to La Mesa and the introduction of water safety, risk and asset management plans. The Italian contractor CMC di Ravenna has been awarded for the Design and Construction of the Project with Alpina and EG Team as Design Consultants. The Project involves the construction of a new hydraulic tunnel including a new intake structures at Ipo reservoir and channel connecting the tunnel outlet to existing aqueducts. The tunnel has a length of 6.45 km with an internal diameter of 4.2 m and will be excavated with a Double Shield TBM. The challenge of this project lies in the fact that the structures are located in a highly seismic zone near an active fault system capable of generating earthquakes of magnitude up to 7.7.