This case arises out of a dispute between the two states over the Tongue River, which serves as a source of water for the Northern Cheyenne: “The Northern Cheyenne, whose primary water source is the Tongue River, lent their support to Montana in a move to protect their own claims. The compact specifically says that nothing in the document ‘shall be so construed or interpreted as to affect adversely any rights to the use of the waters of the Yellowstone River and its tributaries owned by or for Indians, Indian tribes and their reservations.'” (from the Billings Gazette).

Here is the government’s brief favoring Montana’s position.

Other briefs will be posted as they come on line.