Miramar Reservoir is a reservoir located in the Scripps Miramar Ranch community of San Diego, California. Owned, operated and maintained by the City of San Diego, the reservoir was completed in 1960 as part of the second San Diego Aqueduct project. Water flowing south to the reservoir originates from both the Colorado River Aqueduct and the California Aqueduct, brought into San Diego by the San Diego County Water Authority.