1 p. article describing the building of the Columbia River Highway, including construction details. The article also contains four photographs: one depicting the bridge at Shepperd's Dell, one depicting the entrance to the observatory tunnel, one depicting Mitchell's Tunnel through Storm Cliff; one showing the overlook at Crown Point on the Columbia River.
Article from Scientific American describing the building of the Columbia River Highway, including construction details. The article also contains four photographs: one depicting the bridge at Shepperd's Dell, one depicting the entrance to the observatory tunnel, one depicting Mitchell's Tunnel through Storm Cliff; one showing the overlook at Crown Point on the Columbia River.
65 p. Includes sections of Appendix PP: 1883 annual report of Capt. Charles F. Powell, Corps of Engineers, detailing construction, and other works of river and harbor improvements for the Willamette and Columbia rivers.
58 p. Includes sections of Appendix OO: 1881 annual report of Maj. G. L. Gillespie, Corps of Engineers, Bvt. Lieut. Col., detailing construction, navigation, surveys and other works of river improvements for the Willamette and Columbia rivers.
59 p. Includes sections of Appendix OO: 1882 annual report of Capt. Charles F. Powell, Corps of Engineers, detailing construction, surveys and other works of improvement for the Willamette and Columbia rivers.
49 p. Includes sections of Appendix SS: 1885 annual report of Capt. Charles F. Powell, and Appendix TT: reports of Maj. W. A. Jones, Corps of Engineers, detailing construction and other works of river and harbor improvements for the Willamette, Columbia and Snake rivers.
53 p. Includes sections of Appendix QQ: 1884 annual report of Capt. Charles F. Powell, Corps of Engineers, detailing construction, surveys and other works of river and harbor improvements for the Willamette and Columbia rivers.
12 p. Selected pages of the Report of the Chief of Engineers, United States Army for 1885. Included are annual reports upon works of river and harbor improvements for the Willamette, Columbia and Snake rivers.