260 ft (79 m) high and 8,875 ft (2,705 m) long, on the Columbia River between Oregon and Wash., NE of The Dalles, Oreg.; built 1952-57 by the U.S. Corps of Engineers. The dam, a major link in the development of the Columbia basin, provides hydroelectric power and improves navigation. Located at the head of the slackwater pool created by Bonneville Dam, it impounds a reservoir that provides ship passage 25 mi (40 km) upstream to John Day Dam. Fishways permit salmon and other migratory fish to pass the dam.
(Columbia Encyclopedia, Sixth Edition, Copyright (c) 2004.)

Located in the original Surgeon's Quarters at Fort Dalles, 1857. The museum features Carpenter Gothic achitecture, pioneer memorabilia, and a collection of horse drawn vehicles.
Constructed in 1850, the Fort is geographically located on a trading and fishing center for Native Americans. Fort Dalles was the only US Army post between Fort Laramie (Wyoming) and Fort Vancouver.

The Columbia Gorge Discovery Center is the official interpretive center for the Columbia River Gorge National Scenic Area. This 26,100 square foot exhibit wing holds interactive displays which bring to life the tremendous volcanic upheavals and raging floods that created the Gorge, describe the mighty River which sculpted patterns for a unique and spectacular diversity of vegetation, wildlife, and ancient life ways, and follow the currents that shape our futures in the Gorge.
(copyright gorgediscovery.org)