261 p. The purpose of the Columbia River and Tributaries Study is to provide an up-to-date (1974) review of the main Columbia River system development. This study inventories and examines problems and areas of concern known to public and governmental agencies and includes comments on the status and tentative disposition of proposed action on many of these concerns.
74 p. Includes sections of Appendix MM: 1880 annual report of Maj. G. L. Gillespie, Corps of Engineers, Bvt. Lieut. Col., detailing construction, surveys and other works of river improvements for the Willamette and Columbia rivers.