2014 Map of Bonneville Dam

About this map

Bonneville Dam anchors this study of the Columbia River Gorge, where the engineered structure spans the state line between Washington and Oregon. This 2014 survey documents the complex geography of the river's path, including Bradford Island and Cascades Island at the dam site, and the high-elevation terrain of Gifford Pinchot National Forest to the north. Local history is preserved in the location of the Iman Cem near Stevenson and the Freddie Masterson Grave in Cascade Locks. The map highlights the transit corridor through the gorge, featuring the Bridge of the Gods and the Toothrock Tunnel. Diverse water bodies such as Gillette Lake and Ashes Lake are visible along the river's northern banks, while the Pacific Crest National Scenic Trail winds through the forested bluffs and past landmarks like Sacagawea and Papoose Rocks.