Ipo Dam is a concrete

water reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including control ...

gravity dam found in the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

. The dam is located about 7.5 kilometres downstream of the

Angat Dam Angat Dam () is a concrete water reservoir embankment hydroelectric dam that supplies Metro Manila and nearby provinces with water. It was a part of the Angat- Ipo- La Mesa water system. The reservoir supplies about 90 percent of raw water requ ...

within the Angat Watershed Forest Reserve in Norzagaray,

Bulacan Bulacan, officially the Province of Bulacan ( tl, Lalawigan ng Bulacan), is a province in the Philippines located in the Central Luzon region. Its capital is the city of Malolos. Bulacan was established on August 15, 1578, and part of the Me ...

province. It was a part of the Angat-Ipo- La Mesa water system. Its normal level is 101 m. 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 characterised 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. Philippine Island - Angat River - NARA - 68155812

Philippine Island - Angat River - NARA - 68155812

Battle of Ipo Dam

On 19 May 1945, during

WWII World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

, the dam was captured in the Battle of Ipo Dam. The Yay Regiment of the

Marking Guerrillas The Marking Guerrillas were a Filipino guerrilla army that took part in the anti-Japanese resistance during the Japanese occupation of the Philippines in World War II. Headed by Colonel Marcos V. "Marking" Agustin and Valeria "Yay" Panlilio, th ...

, under the command of Col. Marcos V. Agustin, and the 43rd Division, supported by the

Fifth Air Force The Fifth Air Force (5 AF) is a numbered air force of the United States Air Force Pacific Air Forces (PACAF). It is headquartered at Yokota Air Base, Japan. It is the U.S. Air Force's oldest continuously serving Numbered Air Force. The organizat ...

, captured the water source intact from the Japanese defenders.

References

Ipo Dam tree planting
Dams completed in 1984 Sierra Madre (Philippines) Buildings and structures in Bulacan {{Philippines-struct-stub