Maps. Plan, Powder River, Mont., 19 miles below Powderville to Moorhend, topography by R. N. Doolittle, S. L. Smith, L. L. Young and H. D. Tefft, jr., surveyed in 1946. Scale 1 m.=2.6 in., scale 1:24,000. contour interval on land 10 ft., on river surface 5 ft. n. p.