Green Peter Dam is located at river mile 5.5 on the Middle Santiam River, 11 miles northeast of Sweet Home, Ore.
Green Peter Dam is a concrete structure with a gated spillway that was completed with Foster Dam in 1968 at a cost of $82.3 million. Green Peter Dam has two hydropower generating units capable of producing a total of 80 megawatts.
Green Peter Dam works in coordination with Foster Dam for the purposes of flood risk management, hydropower, water quality improvement, irrigation, fish and wildlife habitat and recreation.