Semirara Mining and Power Corp. Slashed its 2026 coal output target to 12 million metric tons after uncontrollable seawater flooded its core Acacia pit in the Philippines. Stripping operations are halted indefinitely. The revised target is a drop of nearly 40 percent from the record 19.9 million tons produced in 2025.

Seawater is surging into the active pit at roughly 30,000 cubic meters an hour. That far exceeds on-site pumping capacity. The structural failure accelerated on September 20 when material from North Block 1 Dam 2 collapsed, sending surface runoff straight into the mining area.

Crews are attempting to erect another cut-off wall. Meanwhile, the operational breakdown forced SMPC to lay off 1,458 mine-site workers. The company cut an initial tranche of 462 staff before letting go an additional 996 personnel.

Timing could not be worse for the operator or the power grid. Coal Operating Contract No. 5 expires on July 14, 2027. That leaves the Department of Energy scrambling to auction operating rights to the highest financial bidder.

Energy officials terminated a previous bidding round in September following legal disputes, engineering problems, and operator objections. They now plan to restart the auction between November and December. That gives the winning contractor barely seven months to take over before the current license lapses.

A legal fight is also playing out in court over more than 55 billion pesos in infrastructure and machinery on Semirara Island. SMPC filed a petition for declaratory relief after the energy department demanded a full inventory of the operator’s property and plant to share with rival bidders.

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