Dry season tightens Costa Mar's power margins as exports strain the grid

The Esperanto River system that feeds Costa Mar's hydroelectric cascade has fallen to seventy-two percent of capacity, the lowest reading since August 2023, according to the Federal Hydro Authority's latest bulletin released Thursday. The measurement, taken at the Punta Negra monitoring station above Puerto Azul, reflects the region's transition into its driest months, when rainfall across the peninsula drops sharply and reservoir replenishment slows.

Power exports to Oriente Moderno and Tierra Verde have remained steady through the summer, but the combination of lower inflows and sustained federal demand is narrowing the safety margin that Costa Mar's planners have historically maintained for dry-season peaks. The Federal Hydro Authority's monthly report flags the situation as manageable but notable—the first such flag since 2021.

Regional energy officials say the grid remains stable and that rolling blackouts are not anticipated, but the tighter margins underscore a recurring tension between the region's commitment to one hundred percent renewable generation and the federal assembly's pressure to maximize export revenue during high-demand seasons elsewhere in the Republic.