2161 2.4 Financial Structure and Social Foundation The Pillones Project had a total cost of USD 20 million, was constructed between 2002 and 2006, and was financed 60% by EGASA and 40% by Cerro Verde. Beyond the financing structure, the decisive element was a strategic territorial development agreement. Through a process of continuous dialogue and community participation, local communities facilitated land access and their voluntary resettlement in exchange for new infrastructure built with durable materials and equipped with basic services that had previously been unavailable, including electricity, potable water, and sewerage systems. The new housing, together with a church, community center, school, and complementary facilities, established a solid foundation of trust and social legitimacy for the project. 3. THE VIRTUOUS WATER CIRCLE: PILLONES AS A CATALYST The “Virtuous Water Circle” did not emerge spontaneously nor as the result of multiple independent projects. It was activated by the construction of the Pillones Dam, which acted as enabling infrastructure and a systemic catalyst for regional water development. Pillones represented a turning point that transformed a context of scarcity and competition over water resources into a platform for coordinated expansion. Following its implementation, the technical, institutional, and financial conditions were established to allow the progressive incorporation of new reservoirs—Bamputañe (40 Mm³), Chalhuanca (26 Mm³), and San José de Uzuña (10 Mm³)—as well as complementary infrastructure for potable water supply and wastewater treatment. In this way, Pillones not only increased storage capacity by 80 Mm³ but also triggered a sequence of investments that consolidated an integrated water management system. 3.1 Securing the Source: The First Loop of the System The starting point of the circle is water security. With Pillones as its foundation and the subsequent expansion of the reservoir system, regional storage capacity exceeded 400 million m³, reducing seasonal variability and ensuring water availability during the dry season. Securing the source activated the first feedback loop: water reliability enabled more stable planning of energy generation, urban expansion, agricultural development, and mining investment with reduced risk. 3.2 Renewable Energy: Regulation that Multiplies Capacity The regulation initiated with the Pillones Dam—and subsequently reinforced by the new reservoirs incorporated into the system—made it possible to optimize the operation of EGASA’s six Charcani hydroelectric power plants, which together have an installed capacity of 170 MW. Greater flow stability and availability increased the average capacity factor from approximately 50% to 60%, raising annual renewable generation by about 20%, from 750 to 900 GWh/year. Without the need to construct new hydroelectric plants, the expansion of the water regulation system maximized the utilization of the existing 170 MW installed capacity, demonstrating how storage infrastructure can function as a multiplier of clean energy and operational efficiency.
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