A country club in Dallas, Texas, stands accused of stealing water for several decades. The Prestonwood Country Club is accused of using water to irrigate its golf course in Plano, diverting Dallas-owned water from nearby Indian Creek.

The case involves Prestonwood’s The Hills course; the club’s main property and original course are in Dallas. It is believed that this diversion of water has occurred since the time the course was built, more than 25 years ago.

The city of Dallas roughly estimated the charges of the diverted water to be slightly under $600,000, based on annual rates since 1986. That number does not, however, include estimated interest, which could double that total.

The allegations against Prestonwood first came to light in 2011, when a Plano resident reported The Hills to the Texas Commission on Environmental Quality (TCEQ). According to TCEQ documents, Prestonwood “failed to obtain authorization prior to diverting state water,” which is a violation of the Texas Water Code. It is unclear why top city officials did not find out about the allegations until recently.