63 p. Includes sections of Appendix JJ: 1877 annual report of Maj. John M. Wilson, Corps of Engineers, detailing surveys and statistics about and works of river 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.
147 p. An inventory of potential pumped-storage sites located in Washington, Oregon, Idaho, western Montana, and within the Columbia River Basin of the United States.
A black and white image of Castle Rock on the Columbia River. Fir trees line the riverbank and the shoreline in the immediate foreground is covered with stones and pebbles. Five rowboats or sailboats surround a small steamboat. An American flag is visible on one end of the steamboat. One person is in each of four of the smaller boats; the fifth boat is empty and is close to shore.
A black-and-white stereoscopic view published by C.E. Watkins. The caption reads "Castle Rock, Columbia River". A rocky beach is in the foreground. Across the river deciduous trees line the river, with evergreens behind them and covering the low hills which rise behind Castle Rock. The Rock itself displays a number of columns, and is topped with a few trees, which also straggle up its sides.