Kalayaan Pumped-Storage Power Plant

Also known as: Kalayaan Pumped-Storage Hydroelectric Project — the full project designation · Kalayaan PSPP (Pumped-Storage Power Plant) — the abbreviation used in plant trackers · KSPP I and KSPP II — the two phase designations for Kalayaan 1 and Kalayaan 2

Places

Definition

The Kalayaan Pumped-Storage Power Plant is the hydroelectric pumped-storage facility at Kalayaan, Laguna, roughly 950 feet above Laguna de Bay, its turbines set between two reservoirs: Lake Caliraya above — created by Caliraya Dam in neighboring Lumban and augmented by Lumot Lake through a 2.3-kilometer underground penstock — and Laguna de Bay, the largest lake in the Philippines, below as the lower reservoir. (Wikipedia — Caliraya Dam, Wikipedia — Laguna de Bay) The project was commissioned on February 23, 1983, with an initial output of 300 megawatts from two Francis-type reversible pump-turbines built by the National Power Corporation, and was rated at 684.6 megawatts by 2008; plant trackers list its phases as Kalayaan 1 (2 x 183 MW nameplate) and Kalayaan 2 (2 x 185 MW nameplate), both dated 1983, within the three-plant Caliraya-Botocan-Kalayaan (CBK) complex. (Wikipedia — Caliraya Dam, Global Energy Monitor — Kalayaan 1, Global Energy Monitor — Kalayaan 2)

The plant is the Philippines’ first and only operating pumped-storage facility — “a giant rechargeable battery” that pumps water from Laguna de Bay up to the Caliraya reservoir when demand is low and releases it through the turbines at peak, the Luzon grid’s principal storage and peaking instrument. (Philstar — Aboitiz vows additional investments) It was operated by CBK Power Company Limited under a 25-year build-rehabilitate-operate-transfer contract that expired in February 2026, after which the Power Sector Assets and Liabilities Management Corporation (PSALM) sold the 797-megawatt complex “as is, where is” to the Thunder Consortium — Aboitiz Renewables at a controlling 64 percent, with Sumitomo Corporation and the Electric Power Development Company (J-Power) — for over ₱36.27 billion, in a turnover led by President Ferdinand Marcos Jr. (Philstar — Laguna power complex draws big-time bidders, Philstar — Aboitiz vows additional investments)

Identities

Authority	Value
Wikipedia	https://en.wikipedia.org/wiki/Kalayaan_Pumped-Storage_Hydroelectric_Project
Wikidata	N/A
DBpedia	N/A
ProductOntology	N/A
Wiktionary	https://en.wiktionary.org/wiki/kalayaan (Tagalog common noun “freedom” — the word, not the facility)
Library of Congress Subject Headings	N/A
MeSH	N/A
NCBI Taxonomy	N/A
AGROVOC	N/A
Google Scholar	https://scholar.google.com/scholar?q=%22Kalayaan%22+pumped+storage+Laguna
ConceptNet	N/A
OpenCyc	N/A

Also Known As

Kalayaan Pumped-Storage Hydroelectric Project — the full project designation
Kalayaan PSPP (Pumped-Storage Power Plant) — the abbreviation used in plant trackers
KSPP I and KSPP II — the two phase designations for Kalayaan 1 and Kalayaan 2

Examples and Analogies

One complex, three plants, one watershed: Kalayaan is the storage heart of the CBK complex — Caliraya (39.3 MW, Lumban) and Botocan (22.96 MW, run-of-river, the country’s oldest hydro plant) ride the same waters from the Sierra Madre down to Laguna de Bay, a shallow lake big enough to absorb the pumping draw. (Philstar — Aboitiz vows additional investments, Wikipedia — Laguna de Bay)
Verified facility data:
Location: Kalayaan, Laguna, west of Lake Caliraya, about 950 feet above Laguna de Bay
Reservoirs: upper — Lake Caliraya (Caliraya Dam, Lumban), with Lumot Lake linked by a 2.3-km underground penstock; lower — Laguna de Bay; combined working storage 30 million cubic meters
Commissioning: February 23, 1983, initial 300 MW from two Francis-type reversible pump-turbines; rated 684.6 MW in 2008; planned stages to 900 and 2,000 MW
Tracked phases: Kalayaan 1 (KSPP I) 366 MW nameplate, 2 x 183 MW; Kalayaan 2 (KSPP II) 370 MW, 2 x 185 MW; both dated 1983; owner of record CBK Power (100 percent)
Operators: built by NAPOCOR; CBK Power Company Limited (25-year transfer contract to February 2026); Thunder Consortium (Aboitiz Renewables 64 percent, Sumitomo, J-Power) from 2026, bid over ₱36.27 billion

Usage Scenarios

1. Balancing the Luzon Grid

System operators use Kalayaan to absorb surplus off-peak generation and release peaking capacity when Luzon demand spikes — a role that grows as variable solar and wind capacity rises, set in context in this wiki’s entry on hydropower in the Philippines. (Philstar — Aboitiz vows additional investments)

2. Studying Philippine Power Privatization

The plant anchors the CBK privatization — PSALM’s auction of the 797-megawatt complex drew nine pre-qualified groups before the Aboitiz-led consortium won at over ₱36.27 billion, proceeds earmarked for classrooms, roads and hospitals — a case study in the disposition of NAPOCOR’s generation assets. (Philstar — Laguna power complex draws big-time bidders, Philstar — Aboitiz vows additional investments)

3. Watershed and Lake Management Around Laguna de Bay

The scheme’s dependence on Laguna de Bay ties its operation to lake-level management and the Laguna Lake Development Authority’s mandates — a change in the lake’s regime is a change in the plant’s resource. (Wikipedia — Laguna de Bay, Wikipedia — Caliraya Dam)

Strategies

Store energy where the geography gives it for free: the fall from the Caliraya plateau to Laguna de Bay, engineered for the 1939-vintage dam, was reused in the 1980s as the nation’s storage battery. (Wikipedia — Caliraya Dam)
Rehabilitate-operate-transfer before privatize: the state first drew a quarter-century of private rehabilitation and operation (CBK Power, to February 2026), then sold the complex “as is, where is” — sequencing that maximized asset condition and sale value. (Philstar — Laguna power complex draws big-time bidders)
Squeeze every megawatt: the new operator’s stated strategy is upgrade-and-optimize — investment to raise output and flexibility, announced at the 2026 turnover. (Philstar — Aboitiz vows additional investments)

Security and Safety Measures

Dam and reservoir regulation: the upper works carry the Caliraya and Lumot dams’ 30-million-cubic-meter working storage, managed between fixed maximum and minimum levels under the dam-safety regime governing NAPOCOR-era infrastructure. (Wikipedia — Caliraya Dam)
Grid security role: as the Luzon grid’s storage plant, Kalayaan provides the peaking and reserve capability that underpins grid reliability — the function the President invoked in calling it a strategic asset at turnover. (Philstar — Aboitiz vows additional investments)
Transparent public auction: the sale ran through PSALM’s solicited bidding, with nine pre-qualified groups and a published reserve price. (Philstar — Laguna power complex draws big-time bidders)

Historical Context

The National Power Corporation built Caliraya Dam from 1939 under designs prepared for the Commonwealth by Major General Hugh John Casey; the dam was rebuilt, raised and inaugurated in 1953 after war damage, and Republic Act No. 216 of June 1, 1948 funded the Lumot River diversion that created the twin-reservoir system. On this inheritance NAPOCOR commissioned the Kalayaan project on February 23, 1983 with 300 megawatts from two reversible units, expanding to a rated 684.6 megawatts by 2008 within a complex planned for eventual stages of 900 and 2,000 megawatts. (Wikipedia — Caliraya Dam)

The modern chapter is the privatization arc: the CBK complex — Caliraya in Lumban, Botocan in Majayjay, and Kalayaan itself — was placed under CBK Power Company Limited on a 25-year build-rehabilitate-operate-transfer contract expiring in February 2026; PSALM then auctioned the 797-megawatt complex “as is, where is,” drawing nine bidders before the Thunder Consortium — Aboitiz Renewables at a controlling 64 percent with Sumitomo and J-Power — won with over ₱36.27 billion. President Marcos Jr. led the February 2026 turnover, with proceeds pledged to classrooms, roads and hospitals, and the new owners committing to “squeeze every megawatt” through further investment in the country’s only pumped-storage plant. (Philstar — Laguna power complex draws big-time bidders, Philstar — Aboitiz vows additional investments)

Challenges and Controversies

Capacity Accounting

The plant’s size depends on the source: 684.6 MW rated as of 2008 in the dam-and-project documentation, 736 MW combined nameplate in plant trackers, and 734.36 MW in the 2026 privatization coverage — a spread reflecting upratings and differing conventions, and a caution against quoting one number. (Wikipedia — Caliraya Dam, Global Energy Monitor — Kalayaan 1, Philstar — Aboitiz vows additional investments)

A One-of-a-Kind Asset, Forty Years On

Kalayaan remains the country’s only operating pumped-storage plant more than four decades after commissioning — evidence both of its suitability and of the absence of successor storage projects. (Philstar — Laguna power complex draws big-time bidders, Philstar — Aboitiz vows additional investments)

Dependence on One Lake

The lower pool is Laguna de Bay — a shallow lake subject to flooding, drought and competing uses — so the plant’s resource base is managed jointly with fisheries, flood control and lakeshore communities. (Wikipedia — Laguna de Bay)

Public Asset, Private Storage Monopoly

The ₱36.27-billion sale of the state’s only storage plant to a single consortium concentrated a strategic grid function in private hands — defended as the fastest route to reinvestment, questioned as the transfer of a capability built with public money. (Philstar — Aboitiz vows additional investments)