IPO Dam - Phillipines

The Ipo Dam is a gravity concrete dam located about 7.5 kilometres downstream of the Angat Dam near its confluence with the Ipo River in Bulacan. It was completed in January 1984 with a maximum storage capacity of 7.5 million cubic metres, an increase of about 2,500 million litres per day (MLD) from the old Ipo Dam, which was completed in December 1938, used to be located 200 metres upstream of the new dam.

The spill level of the dam is at an elevation of 101 metres and it has seven radial floodgates. The watershed topography is characterized by mountainous terrain similar to the Angat Reservoir Watershed with moderate forest cover. The watershed has an area of about 70 square kilometers and receives an average annual rainfall of 3,500 millimeters. Tributaries to the Angat River at this section include the Ipo, Sapa Pako and Sapa Anginon Rivers. These tributaries drain into the Angat River from the eastern section of the watershed.

Water from the dam is diverted to the Novaliches Portal and the La Mesa Dam through three intake structures going down to three connecting tunnels into five connecting aqueducts.

When dam owners needed a robust barrier that could withstand heavy monsoonal rains and hits from typhoons, they turned to Worthington Products, Inc., a global producer of waterway barriers for debris control, safety and security. Worthington’s design team worked closely with engineers in Germany, Canada and the Philippines to develop and implement a long-term workable solution.

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Paul Meeks