Title: Letter from the Chief of Engineers United States Army to the Chairman of the Committee on Commerce United States Senate submitting a report of the Board of Engineers on Rivers and Harbors relative to the cost of building dams on the Bear River, Middle American, and North American Rivers, together with the recommendations of the Hydraulic Mining Commission of California, and the proposed change in the California Debris Commission Act
Subjects: Mines and mineral resources, Governmental investigations
Places: California