P1.8-B NIA project to boost irrigation,
flood protection in Pilar, Bohol
TAGBILARAN CITY, Bohol (PIA)—The Malinao Dam will hold nearly twice as much water once the National Irrigation Administration (NIA) finishes a P1.8 billion upgrade, giving Bohol farmers steadier irrigation.
The Malinao Dam Improvement Project (MDIP) will raise the dam’s storage capacity from 5 million cubic meters to about 9 million cubic meters, the NIA in Central Visayas said.
About 799 farmers tilling 740 hectares are expected to benefit, especially those at the tail end of the irrigation canals, where water runs short, the agency said.
The project supports President Ferdinand Marcos Jr.’s directive to government agencies to expand irrigation service areas nationwide in 2027.
The proposed 2027 national budget includes P30.44 billion for NIA’s irrigation services program, which would develop 11,153 hectares of new irrigation service areas.
How the upgrade works
The NIA is modifying the dam’s existing bathtub spillway and building an auxiliary spillway.
Both will have automated rubber weirs that can raise the spillway crest by up to 2 meters, letting the dam store more water.
The dam's capacity has been limited by its small reservoir and by silt that has built up since it began operations in 1996, said Felix Guioguio, head of the Malinao Irrigation System.
Water runs short in the dry season, while heavy rains bring more water than the dam can hold, Guioguio said.
The dam also supplies the integrated Bayongan and Capayas dams.
“Pinaagi sa MDIP, gilauman nga mas mapaayo ang pagdumala sa tubig ug mapalig-on ang kapasidad sa dam sa pagdumala sa sobra nga tubig panahon sa kusog nga ulan (Through the MDIP, we expect better water management and a stronger capacity to handle excess water during heavy rains),” he said.
The added storage will help farmers keep planting through dry spells as the government prepares farms for a strong El NiƱo.
Safer communities downstream
The project is also expected to improve flood protection for communities downstream
In January 2023, heavy rains pushed the dam’s water level past its capacity.
The NIA in Central Visayas then advised residents near the Wahig River in Pilar to evacuate.
As of Sept. 30, first phase was 30% complete and the second phase 13% complete, the NIA in Central Visayas said. Both phases are expected to be finished in 2028. (ECB/PIA7-Bohol)
The on-going Malinao Dam Improvement Project (MDIP) implemented by the National Irrigation Administration (NIA) Region 7. Once finished, the project is expected to make water delivery to agricultural communities more reliable, improve the operation of the integrated irrigation systems that depend on the dam, and bolster the safety and efficiency of this vital water facility in Bohol. (photo from NIA-7)

