Dominguez said Manila Water's current service interruptions bolster the need for the dam's construction.
"Absolutely. Had [the dam] been done before the water crisis, this had been much less serious or much less of a threat," he said.
Dominguez told reporters that the bidding for the project is well on its way.
"I'm sure the MWSS (Metropolitan Waterworks and Sewerage System) will urge the contractors to move faster than originally planned," he added.
The Kaliwa Dam would cost P12.2 billion to build, with 85% set to be funded by China through official development assistance. The remaining amount will be shouldered by the Philippine government through the MWSS.
The dam will be constructed by Beijing-run China Energy Engineering Corporation in the municipalities of General Nakar and Infanta in the province of Quezon.
It is expected to supply some 600 million liters of water per day to Metro Manila. (READ: Manila Water on the hunt for new water sources)
The project was initially planned to be a public-private partnership endeavor in 2014, under the Aquino administration. However, the financing scheme was changed during the Duterte administration.
Should the construction push through this year, the dam is expected to be done by 2023.
Local groups and environmentalists oppose the project due to its social and environmental impact on the community. (READ: [ANALYSIS] The economics of Metro Manila's burgeoning water crisis) – Rappler.com