The reservoir was created by the Oxbow Dam that is a hydroelectric run-of-the-river rockfill dam on the Snake River on the Idaho-Oregon border, in Hells Canyon (river mile 273). Completed 60 years ago in 1961,[1] it is part of the Hells Canyon Project that also includes Hells Canyon Dam and Brownlee Dam, built and operated by Idaho Power Company.
john ferebee photo 
Beautiful shot!