Eastern Branch (1956)

Area: In MONTANA, Counties of Big Horn, Blaine, Carbon, Carter, Cascade, Chouteau, Custer, Daniels, Dawson, Fallon, Fergus, Garfield, Golden Valley, Hill, Judith Basin, Liberty, McCone, Musselshell, Philips, Petroleum, Powder River, Prairie, Richland, Roosevelt, Rosebud, Sheridan, Stillwater, Sweet Grass.Treasure, Valley, Wheatland, Wilbaux, and Yellowstone.