The San Diego County Water Authority this week issued a Request for Proposals for a potential joint energy storage projectwith the City of San Diego that could lessen upward pressure on water rates and also increase opportunities for renewable energy penetration throughout the region by leveraging existing infrastructure at San Vicente Reservoir. The potential project would consist of a closed-loop interconnection and pumping system between the existing San Vicente Reservoir (which is owned by the City of San Diego) near Lakeside and a new, smaller reservoir located uphill. The system could provide up to 500 megawatts of renewable energy.