The Moose River is an 83mi river in Maine. Its source is in Beattie (Maine Township 2, Range 8, WBKP), on the Canada–United States border, which runs along the height of land between the watersheds of the Kennebec River in Maine and the Chaudière River in Quebec. From there, the river runs east through Attean Pond and Wood Pond, past the town of Moose River, then through Long Pond and Brassua Lake. The Moose River empties into Moosehead Lake, the source of the Kennebec River, in Rockwood Strip (T1, R1, WBKP). The International Railway of Maine was built along Moose River in 1889.Attean PondAttean Pond covers the southeast corner of Attean Township. Moose River flows into the south end of Attean Pond from Bradstreet Township and overflows from the northeast corner of the Attean Pond. A second major tributary from Holeb Pond enters the western end of Attean Pond. Smaller tributary Williams Brook reaches the eastern shore of Attean pond, while Thompson Brook and McKenney Brook enter the east bank of Moose River between Attean Pond and Big Wood Pond. The railroad follows the southern shore of Holeb Pond and crosses the tributary to follow the northern shore of Attean Pond. The western end of the pond, known as The Narrows, reaches the maximum depth of 55ft, making it the best region to fish for Salmon, while the remainder of the pond is less than 20ft deep and better suited for yellow perch than for trout. Of the 2,745 acres, only 600 acres are deeper than 20 ft.