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Laiban Diversion Tunnels

Laiban Diversion Tunnels

Address: Tanay, Rizal

Sub-Category: Dam/Dike

Ownership: Public

Status: Not Occupied

Conditions: Fair

Area: 276 sqm

Estimated Age: 1970’s

Owner Jurisdiction: Government

Description: The Laiban Dam is an unfinished dam project, and it is approximately 100 km. East of Metro Manila at the Kaliwa River basin in Barangay Laiban, Tanay, Rizal. It has an area of 276 sqm. And is connected by two rivers, the Lenatin River with 130 sqm and the Limutan River with 146 sqm. The river drains a mountainous watershed of approximately 28,000 hectares on the eastern slope of the Sierra Madre Mountains. The Kaliwa river merges with the Kanan River forming the Agos river which discharges into the Pacific Ocean in Infanta, Quezon province.

History Structure: The Laiban Dam is a multi-purpose water supply and power project envisaged by the Metropolitan Waterworks and Sewerage System (MWSS) as a major source of water to complement the current supply for Metro Manila and neighboring areas provided by Angat Dam. Utilizing the Kaliwa River Basin in Tanay, Rizal. The Office of the President during the term of Ferdinand Marcos took the initiative of implementing the Laiban Dam Project. However, the project was deferred as it was not considered a priority during the administration of Corazon Aquino (1986-1992) and the administration of Fidel Ramos (1992-1998). The implementation of the project only resumed during the administration of Joseph Estrada until his ouster in 2001. President Gloria Arroyo continued the project allotting a budget through the National Economic Development Authority (NEDA) to resume its construction. The MWSS is an attached agency to the Department of Public Works and Highways (DPWH), which was created in 1971 by the virtue of Republic Act No. 6234. The Arroyo administration has given the highest priority to the implementation of Laiban Dam Project to provide long term water source and stable supply to Metro Manila.

Stories: There are beliefs that the Laiban Diversion Tunnels at Sitio Manggahan, Barangay Laiban, Tanay, Rizal was built by a group of Chinese, Japanese, and Korean on 1978 through the leadership of Isagani Ebora. It was built within the water basin of Kaliwa River. There rumors that there is a fairy in the abandoned Laiban Diversion Tunnels. The fairy protects the nature within the vicinity of the proposed Laiban Dam. The fairy was opposed to the construction of the Laiban Dam so she used her power to stop the said project. There were workers who said that they saw the fairy in the form of an old woman and told them to stop the construction of the Laiban Dam.