4 p. Selected pages of the Report of the Chief of Engineers for 1875. Includes reports on the improvement of rivers in Oregon and Washington territory.
13 p. Selected pages of the Report of the Chief of Engineers for 1873. Also included are annual reports on the works of river improvement for the Willamette and Columbia rivers, Oregon.
6 p. Selected pages of the Report of the Chief of Engineers for 1879. Included are annual reports upon works of river improvements for the Willamette and Columbia rivers.
16 p. Selected pages of the Appendixes to the Report of the Chief of Engineers for 1874. Included are annual reports upon works of improvements for the Willamette and Columbia rivers.
65 p. Selected sections of Appendix GG: Report of Major N. Michler, Corps of Engineers. Included are annual reports upon works of river improvements for the Willamette, Columbia, and Snake rivers.
19 p. Selected pages of the Report of the Chief of Engineers for 1871. Also includes annual report on the works of river improvement in Oregon for the fiscal year.