Bonneville Spillway Dam

摘要

Last month, we took a look at the use of ] large draglines, such as walking drag- < lines, in heavy construction applications. The accompanying photo this i month shows another example of these machines, along with a lot more. i Taken in late 1934 or 1935, the photo shows the site development work for the spillway section of Bonneville Dam. Located 40 miles east of Portland, Ore., on the Columbia River, the dam was the second to be completed on the main stem of the river; Rock Island Dam, downstream from Wenatchee, Wash., was completed in 1933, the year before contracts for Bonneville were awarded. Bradford Island separates the spillway dam (north of the island) from the powerhouse and navigation lock (south of the island).