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1958 Map of Keystone

Name: 1958 Topographic Map of Keystone
Creator: U.S. Geological Survey
Published: 1988
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1988

About this map

Saints John and the remote settlement of Swandyke sit high in the mountain drainage of the Arapaho National Forest, serving as focal points for the region's deep-rooted mining history. This 1958 survey, updated in the late 1980s, documents a landscape shaped by mineral extraction and water management. High peaks like Independence Mountain and Glacier Mountain tower over numerous workings, including the Ida Belle Mine, Saints John Mine, and the Wild Irishman Mine.

Water infrastructure is prominent across the terrain, notably the Roberts Diversion Tunnel and various ditches that redirect flows from the Snake River and Swan River. Below the slopes of Keystone Mountain, the small community of Keystone is visible near the Keystone DMWW and the Gaging Station. From the heights of Porcupine Peak to the historic site of Brewery Hill, the map provides a look at the intersection of high-altitude geology and the technical requirements of mid-century alpine industry.