1957 Map of Copperfield

About this map

The Snake River carves a dramatic path through this high-relief boundary between Oregon and Idaho, marking the transition from the Whitman National Forest to the Payette National Forest. This 1957 survey captures the canyon floor during a period of massive engineering, specifically featuring the Brownlee Dam and its impact on the river's flow near Wildhorse Rapids. The blue hatching on the map indicates areas slated to be submerged by the dam, providing a rare spatial record of the landscape before the reservoir was fully realized.