To direct the Chief of the Army Corps of Engineers to revise certain authorized purposes described in the Missouri River Mainstem Reservoir System Master Water Control Manual.

Not later than 90 days after the date of enactment of this Act, the Secretary of the Army, acting through the Chief of the Army Corps of Engineers, shall revise the Missouri River Mainstem Reservoir System Master Water Control Manual and any related regulations to delete fish and wildlife as an authorized purpose of the Corps and elevate flood control as the highest priority of authorized purposes of the Corps at all times, not just during significant runoff events.