Maps. South Fork Flathead River. Plan and profile of South Fork Flathead River, Mont., above mile 44 and tributaries, topography by Hiram DePuy, jr., R. L. Grazier, and A. S. Sollid, surveyed in 1936. Scale 1:31,680, contour interval on land 20 ft., contour interval on river surface 5 ft. n. p.