Infrastructure EPC company Black & Veatch will evaluate proposals received for a 500MW pumped hydro energy storage facility in San Diego, California. San Diego Water Authority issued a request for proposals (RfP) for the plant last summer, with a 12 September 2017 deadline for submissions. The RfP was for a facility with 5-8 hours energy storage duration, to help support the stability of the local grid at peak times and to integrate local renewable energy production, mostly solar PV.