Powers and Functions

The Magat Dam in Ramon, Isabela

  • Height: 114km
  • Crest Length: 4.16km
  • Discharge Capacity: 30,600 cu. m./sec
  • Storage Capacity Level at Full Supply Level: 1.25 B cu. m.
  • Water Surface Area at Full Supply Level: 45 sq. km.
  • Elevation at Full Supply: 193.00 m.
  • Elevation at Minimum Supply: 160.00 m.
  • Project Cost: 6 Billion
  • Source of Fund: World Bank
  • Construction Period: 1976-1982

“Pinakamalaki at namumukod na imprastraktura sa Pilipinas at isa sa pinakamalawak sa Timog-Silangang Asya. Ginawa upang magdulot ng ibayong buhay sa mga tigang na sakahing lupa; tugon sa karagdagang pangangailangan sa elektrisidad sa Luzon kabilang ang kalakhang Maynila; tubig sa tahanan at industriya, pangisdaan at turismo. Ginawa ng mga inhinyerong Pilipino sa ilalim ng pamamahala ng Pambansang Pangasiwaan ng Patubig. Bahagi ng malawak na programa ng Pangulong Ferdinand E. Marcos tungo sa kaunlarang Pambansa. Ito ang Magat Dam – isang bantayog ng bagong buhay, bagong pag-asa, katuparan sa kaunlaran at kinabukasan ng sambayanang Pilipino.”

(printed on the Magat Dam Inauguration Souvenir Program, October 1982)

 

The Maris Dam in Ramon, Isabela

  • Type: OGEE Concrete
  • Height: 13.50 meters
  • Length: 293.50 meters
  • Storage Capacity: 8 million cubic meters
  • Area Serve: 67,311 has.

At the time of its construction in the 1950’s, the Magat River Irrigation System Dam in Ramon, Isabela is the primary source of irrigation water in the province. It irrigates around 50,000 hectares of rice land.During the Magat River Multi-Purpose project, MARIS Dam was rehabilitated and became part of the Magat River Integrated Irrigation System.

Currently it delivers irrigation water to the Maris Main Canal and North Diversion Canal which serve 68,686 hectares of rice lands within the municipalities of Ramon, Santiago, San Isidro, Cordon, Angadanan, Alicia, Echague, Cabatuan, San Mateo, Luna, Cauayan, Reina Mercedes, Naguillian, Aurora, San Manuel, Roxas, Quirino, Burgos, and Gamu in Isabela Province and the municipality of Alfonso Lista in Ifugao Province.

 

The Siffu Dam in Ramon, Isabela

  • Type: OGEE Concrete
  • Height: 5.20meters
  • Length: 100.00 meters
  • Storage Capacity: 8 million cubic meters
  • Area Serve: 5,905 has.

The main feature of the Siffu River Irrigation System (SIFRIS), the Siffu Dam is a run-off-the-river type dam constructed along the Siffu River in Roxas, Isabela in the 1960’s . Through the Siffu Dam, SIFRIS serves 5,905 hectares of ricelands in the municipalities of Roxas and Gamu in the province of Isabela.

 

The Baligatan Dam in Ramon, Isabela

  • Type: OGEE Concrete
  • Height: 13.00 meters
  • Length: 27.25 meters
  • Storage Capacity: 8 million cubic meters
  • Area Serve: 11,579 has.

Constructed in the 1980’s as part of the Magat River Multipurpose Project, the Baligatan Dam delivers water to the South High Canal and Oscariz Canal which serve high level areas in the system. To date, it provides irrigation water to 9,386 hectares of rice lands located within the municipalities of Ramon, Cordon, and Santiago City in Isabela Province and the municipalities of Diffun, Cabbaroguis and Saguday in Quirino Province.

 

The 360 MW Magat Hydro - Electric Plant in Ramon, Isabela

Constructed in the 1980s under the Magat River Multi-Purpose Project, the Magat Hydro Electric Power Plant is one of the top hydro electric power plants in the country.

Water from the Magat Reservoir is released through the four penstocks going to the MHEPP at 120 cms each. Through large turbines, this is used to generate electricity of up to 360 MW. Water is then released and held at the Maris Dam for irrigation use.

  • Height: 13.00 meters
  • Length: 27.25 meters
  • Storage Capacity: 8 million cubic meters
  • Area Serve: 11,579 has.

 

The 6 MW Baligatan Hydro - Electric Plant in Ramon, Isabela

Through a spherical valve under the Baligatan Dam, water passes to the Baligatan Power Plant and then discharges to the Baligatan Creek. This water is then diverted at the Baligatan Diversion Dam to irrigate the 9,025 hectares of service area along the South High Canal and 2,681 hectares of service area of the Oscariz Main Canal.

 

The MARIIS Pumping Station I in Angadanan, Isabela

  • Number of Pump Units 3
  • Pump Capacity: 69 cu. m./min
  • Length: 661 Hectares
  • Expected Rice Production: 5,844 MT/a

To irrigate rice lands even at high elevation, pumping stations were constructed in the MARIIS Service area. Pumping Station I is located in Angadanan, Isabela under MARIIS-Division IV. It provides irrigation to 661 hectares of rice lands within the municipality.

 

The MARIIS Pumping Station II in Burgos, Isabela

  • Number of Pump Units 5
  • Pump Capacity: 199 cu. m./min
  • Length: 2,704 Hectares
  • Expected Rice Production: 23,904 MT/a

Pumping Station II is located in Burgos, Isabela under MARIIS-Division III. It provides irrigation to 2,704 hectares of rice lands within the municipality.

 

The MARIIS Pumping Station III in Gamu, Isabela

  • Number of Pump Units 5
  • Pump Capacity: 88.8 cu. m./min
  • Length: 2,885 Hectares
  • Expected Rice Production: 25,504 MT/a

Pumping Station III is located in Gamu, Isabela under MARIIS-Division III. It provides irrigation to 2,885 hectares of rice lands within the municipality.