In 2004, the Water Authority and Nevada Colorado River Commission entered into agreements with the Metropolitan Water District of Southern California (MWD) and the Bureau of Reclamation to store a portion of Nevada's unused Colorado River water in Southern California until it is needed.
Under the agreements, Nevada can recover up to 30,000 acre-feet per year from the storage account, with six months advance notice provided to MWD. The Water Authority has banked 20,000 acre-feet of water in the California Water Bank through 2007.