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2011 Map of Mackay Reservoir

Name: 2011 Topographic Map of Mackay Reservoir
Creator: U.S. Geological Survey
Published: 2011
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2011

About this map

Mackay Reservoir serves as the central focal point of this high-altitude landscape, capturing the managed flow of the Big Lost River in Custer County. The shoreline features the Battleground Cemetery and multiple access areas, including the Mackay Dam. To the south, the terrain rises sharply toward the White Knob Summit and Mackay Peak, revealing a landscape deeply marked by industrial history.

Extensive mining operations are documented in the southern reaches, including the Empire Mine complex with its multiple dams and the Horseshoe Mine. Specialized infrastructure like the Cossack Tunnel, Darlington Shaft, and the curiously named Windy Devil suggest a legacy of underground exploration and resource extraction. The map also traces a network of water features from Warm Springs Creek to the Swauger Slough, illustrating the vital role of water in this arid Idaho environment.