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DPWH Signed Agreement with LLDA for Backfilling Site of Marikina River Improvement Project

DPWH Marikina River Improvement Project

The Department of Public Works and Highways (DPWH) has entered an agreement with the Laguna Lake Development Authority (LLDA) to use a parcel of land along shoreland of Laguna de Bay in Taytay, Rizal as backfilling site for the river improvement works at lower/middle Marikina River.

Under a tripartite memorandum of agreement signed on December 14, 2021 by DPWH Undersecretary and Build Build Build Chief Implementer Emil K. Sadain, LLDA General Manager Jaime C. Medina, and Toyo Construction Co. Ltd. Project Manager Ryuta A. Ariyoshi, a 30.04 hectare property in Barangay Sta. Ana, Municipality of Taytay, Province of Rizal will be used as disposal area for materials taken from the dredging and excavation of waterways covered by Marikina River Improvement Works (Sta. 6+700 – Sta. 9+300) of the Pasig-Marikina River Channel Improvement Project (PMRCIP), Phase IV.

The agreement signing was also witnessed by DPWH Unified Project Management Office (UPMO) Flood Control Management Cluster Project Director Ramon A. Arriola III, LLDA Assistant General Manager Generoso M. Dungo, and Toyo Construction Site Manager Tákao Hayase.

PMRCIP Phase 4, included in the list of government’s infrastructure flagship projects, is funded by a loan agreement with the Japan International Cooperation Agency (JICA) to further mitigate flooding due to overflow of Pasig and Marikina Rivers.

The project was officially launched by DPWH Acting Secretary Roger G. Mercado with Ambassador of Japan to the Philippines Kazuhiko Koshikawa, JICA Chief Representative Eigo Azukizawa, Undersecretary Sadain and other officials and representatives of local government units and partner national government agencies with a groundbreaking ceremony last November 16, 2021 held at EFCOS Compound, Barangay Manggahan, Pasig City.

DPWH Marikina River Improvement Project

Undersecretary Sadain said that the MOA with LLDA, having the regulatory function and jurisdiction over the entire Laguna de Bay, is intended to support DPWH project requirement for proper disposal within the period of four (4) years.

The area was idenfied as suitable and ideal backfilling site for materials taken from the DPWH dredging and excavation of the river bank and waterway, which in turn would benefit LLDA as the offered land would be improved and mitigate inundation.

As contractor of this DPWH project, Toyo Construction upon securing the required permits and clearances from LLDA/other appropriate government agencies and local government units and with the condition of strict environmental compliance, will handle the operation of hauling and disposal of the dredged material to the disposal site.

DPWH Marikina River Improvement Project

PMRCIP Phase 4 will cover structural and non-structural measures that will mitigate flood damages in Metro Manila caused by channel overflow of the Pasig-Marikina River, thereby facilitating urban development and enhancing the sustainable environment along the river.

Scopes of work under this phase include channel improvement works for 7.95-kilometer stretch of Lower/Middle Marikina River, including the construction of Manggahan Control Gate Structure (MCGS), and construction of one (1) floodgate and one (1) sluicegate at the joining sections of Cainta and Taytay rivers to Manggahan Floodway, respectively.

The river improvement works will require excavation/dredging works of about 2 Million cubic meters, steel sheet pile revetment stretching 11.6 kilometers, and reinforced concrete flood wall along its 6.1-kilometer section. Drainage improvement will also be undertaken which covers the construction of reinforced concrete pipe in 116 locations, manhole in 253 locations, collector pipes, and flap gates in 102 locations.

The Manggahan Control Gate Structure will be constructed 600 meters downstream from diversion point of Manggahan Floodway while the Cainta Floodgate and Taytay Sluicegate will be at the joining sections of Cainta and Taytay Rivers to the Manggahan Floodway Roller Gate.

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DPWH Marikina River Improvement Project

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