A minister takes responsibility of the role/office he/she is assigned too.
Explanation:
It is a parliamentary fundamental constitution in the British system of government whereby a minister takes responsibility of the office and conduct of the parliament he/she is assigned to.
To the west of the Great Divide is the Green River watershed, draining to the Pacific Ocean and to the north is the North Platte watershed, draining to the Atlantic Ocean so the answer is they feed different watersheds.