thumb|right|225px|Army Corps of Engineers illustration of juvenile fish bypass
thumb|right|225px|Salmon ladder below dam
Rocky Reach Dam is a run-of-the-river hydroelectric dam in the U.S. state of Washington owned and operated by Chelan County Public Utility District. It has 11 generators rated in total 1300 MW. The project is on the Columbia River in north central Washington state about upstream from the city of Wenatchee. The dam is above the mouth of the Columbia. The reservoir impounded by the dam is Lake Entiat. The project provides energy for more than 7 million people throughout the Pacific Northwest.
Rocky Reach is nationally recognized for efforts to protect the environment. A first-of-its-kind juvenile fish bypass system was completed in 2003 to help young salmon and steelhead on their way to the ocean. A major powerhouse upgrade started in 1995 includes new turbines that are more fish friendly. Improvements to turbines and generators are also designed to improve efficiency and reliability.
Hydroelectric power capacity
The powerhouse is equipped with seven Westinghouse generators and four Allis-Chalmers generators. The turbines are adjustable blade Kaplan type to allow for efficient production of energy at varying water levels. Water flows through each of the first seven turbines at a rate of 116 thousand gallons per second and 145 thousand gallons per second through each of the remaining four turbines.
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!Generator!!Nameplate Capacity (MW)