| 13. |  | Report of the Secretary of War, being part of the Message and Documents Communicated to the Two Houses of Congress at the Beginning of the Third Session of the Forty-Sixth Congress. In Four Volumes. Volume II. Part 1. | Channels; Rivers; Civil engineering; | 8 p. Selected pages of the Report of the Chief of Engineers, U. S. Army, for 1880. Included are annual reports detailing improvements of rivers in Oregon and Washington territory. |
