瓦莱西托斯水区（区）位于圣地亚哥县北部， 加利福尼亚州运营着一个高效的水基础设施系统，包括 泵送、储存、传输和消毒设施。大众汽车公司是一家迅速发展的公司 为超过15000名客户提供供水服务的增长地区。目前 该地区正在经历快速增长，这就需要扩大 该地区的基础设施。水库的需求由两个条件驱动: 加利福尼亚州卫生服务部指令涵盖或 放弃现有的开放式双橡树水库；以及提供额外服务的必要性 操作和应急存储，以满足快速增长的需求。地区 也完全依赖进口饮用水。额外的存储空间 将有助于该地区在发生事故时提供供水服务 由于灾难或定期维护导致供水中断 关闭。该区于1991年编制了一份总体规划，其中推荐了52个项目 双橡树水库的百万加仑（mg）储水设施。这个 66mg双橡树水库由两个33mg圆形预应力储罐组成。 第一个储罐的建造于1999年9月完成。第二个坦克 计划在5至7年内完成，或在用水需求需要时完成。这个 第一个坦克的建造被认为是其最大的结构 美国国内的那种。由于水库的大小，特殊 在规划、设计和实施过程中考虑了各种因素 设施的建设。

The Vallecitos Water District (District) located in northern San Diego County, California, operates a highly efficient water infrastructure system consisting of pumping, storage, transmission, and disinfection facilities. VWD is a rapidly growing district providing water service to over 15,000 customers. Currently, the District is experiencing rapid growth which necessitates the expansion of the District's infrastructure. The need for a reservoir was driven by two conditions: a State of California, Department of Health Services directive to cover or abandon an existing open Twin Oaks Reservoir; and the need to provide additional operational and emergency storage to meet rapidly growing demands. The District is also entirely dependent on imported potable water. The additional storage would help enable the District to provide water service in the event of a disruption in the water supply due to disaster or scheduled maintenance shutdowns. The District prepared a Master Plan in 1991 that recommended a 52 million gallon (mg) water storage facility at the Twin Oaks Reservoir site. The 66mg Twin Oaks reservoir consists of twin 33mg circular pre-stressed tanks. Construction of the first tank was completed in September 1999. The second tank is planned in 5 to 7 seven years or when water demands require it. The construction of the first tank is believed to be the largest structure of its kind within the United States. Due to the size of the reservoir, special considerations were taken into account during the planning, design, and construction of the facility.