Hydropower development is in association with Kalinga Hydropower, Inc., to reach 130MW, with an initial project of 20MW. The proposed FIT for run-of-river hydro power is Php 6.15/KWh.
Upper Tabuk Hydropower Project
Bgy. Dupag, Tabuk City, Kalinga
Executive Summary
The Upper Tabuk Hydropower Project is a 20MW hydropower facility with storage along the Tanudan
River, within the ancestral domain of the Minanga Indigenous Cultural Community (ICC) of Kalinga in
Bgy. Dupag, Tabuk City, Kalinga. When the project operates as a daily peaking plant, the annual
electricity production is around 59GWh.
The project internal rate of return (IRR) is 15% and the equity IRR is 20%, with potential upside. The
total project cost is around US$50 million, translating into an investment per MW of US$2.5 million
funded through 35% equity and 65% debt. Revenues are upward of PhP420 million per year with an
EBITDA1 margin of 85%. Operations & Management costs represent 9% of the revenues while
taxes/other costs account for 6%.
The project is a community-solicited and has the strong support not only of the host community, but
also the local government of Tabuk City, Kalinga (LGU Tabuk). The National Commission on
Indigenous Peoples (NCIP) already issued the project’s Certificate of Compliance to the Free-and-
Prior Informed Consent Process (FPIC). LGU Tabuk gave its strong endorsement to the Department
of Energy (DOE) that the project be implemented.
Although the project involves the construction of a dam, inundation is limited to around 20 hectares of
land. No villages, rice fields or culturally important monuments shall be submerged. No streamflow
will be diverted or lost. The water to be impounded shall just be below 0.5% of the mean annual runoff
of the river’s catchment area. Given that the project shall be generating clean energy and that its
over-all impact on the environment is positive, the Department of Environment and Natural
Resources-Environmental Management Bureau already issued the Environmental Compliance
Certificate (ECC) for the project. A conditional water permit was also already by the National Water
Resources Board (NWRB), and with the submission of the water permit requirements contained in
this report, final approval of the water permit is expected.
The engineering site surveys and studies using NAMRIA and PHIVOLCS maps as references, as well
as a review of previous studies of the project site, revealed that the geologic conditions and
geotechnical characteristics of the site are favorable for the project’s development. The map provided
by PHIVOLCS and previous studies show that the site does not sit directly on an active fault. The
nearest known active fault is 1.7 km away from the site, a distance that is well beyond the 5-meter
distance PHIVOLCS recommends as a buffer zone from an active fault.
Following are the key components of the project:
- A roller compacted concrete (RCC) gravity dam that shall allow an operating head of 35.4m;
- A reservoir of around 20 hectares and a useful storage capacity of around 2 million cubic meters (MCM);
- A 90m-long and 4.4m-diameter penstock with inlet inside the dam structure that bifurcates
into two 3.1m-diameter pipes as it approaches the power house;
- A powerhouse that will house two (2) units of Kaplan Turbines, each having a rated capacity
of 10MW;
- A 69kV transmission line to a switching station which shall be connected to the TRANSCO
69kV subtransmission line (part of the national grid) and to the KAELCO 10MVA substation in
Bulanao, Tabuk City, Kalinga;
- The switching station that shall have the following functions: (i) allow the Upper Tabuk power
plant to supply electricity to both KAELCO and the national grid, and to KAELCO only when
generation is low, and (ii) route supply from the grid to KAELCO when the proposed power
plant is not generating; and
- A 2km-long access road and bridge going to the powerhouse.
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