Southern California’s largest water supplier has bought sprawling farmland that could be used to help build twin tunnels under the Sacramento-San Joaquin River Delta.

The Sacramento Bee reports (http://bit.ly/2a3qYUm) the Metropolitan Water District of Southern California said Monday it has completed its purchase of five islands at the hub of California’s water system east of San Francisco.

The newspaper reports Metropolitan announced the completion of the purchase in a two-paragraph memo to board members from the agency’s general counsel.