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.
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.
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.
67 p. Includes sections of Appendix QQ: 1886 annual report of Major W. A. Jones, and selections from Appendix RR, reports of Capt. Charles F. Powell, Corps of Engineers, detailing construction, maps and other works related to river and harbor improvements for the Willamette, Columbia and Snake rivers.