Attorney General Stephen Six faces the U.S. Supreme Court Monday to argue for Kansas in the state's Arkansas River dispute with Colorado.
Six's first appearance before the nation's highest court is the latest chapter in the fight over Colorado's extraction of water from the river from 1950 to 1996.
In 1985, Kansas sued Colorado for violating a water-rights agreement tied to the river. The Supreme Court ruled a decade later that Colorado broke provisions of the compact and Kansas was awarded $34.6 million in damages.
Six will try to convince the justices to overturn rulings of a court-appointed special master that limited payment to Kansas of interest on damages resulting from infractions by Colorado. Kansas was also denied reimbursement for the cost of developing computer models used to reinforce its case.