Built and operated by the U.S. Army Corps of Engineers, The Dalles Lock and Dam is one of the ten largest hydropower dams in the United States. Since its completion in 1957, it has provided the Pacific Northwest with a reliable water source for hydropower, navigation, recreation, fish passage, irrigation, and flood mitigation. The dam is 192 miles upriver from the mouth of the Columbia River and two miles east of the city of The Dalles, Ore.

At The Dalles Dam Visitor Center, you can explore a variety of interactive displays, watch a short film on the benefits and impacts of the dam, get a sneak peek of fish migrating up the fish ladder, or browse the Discover Your Northwest bookstore.