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.

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.

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.

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.

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.

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.

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.

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.

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.