William Burnham Alexander (1877-1957) was an engineer. The collection includes correspondence, agreements, description of agricultural lands of the Rillito and Santa Cruz Rivers in Pima County, AZ along with articles of incorporation of the Federal Power and Water Co.. In addition, there are various related documents pertaining to water power projects in the Coronado National Forest are in Arizona as proposed by the Great Western Power Co., the Sabino Canyon Power and Irrigation Project of Pima County, and the Federal Power and Water Co.