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1986 Map of Black Rock Flat East

Name: 1986 Topographic Map of Black Rock Flat East
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

Alkali Basin and the broad expanse of Black Rock Flat define this high desert landscape in Sweetwater County during the mid-1980s. The terrain is characterized by intricate drainage patterns and geological transitions, where ephemeral watercourses like Black Rock Creek and Twelvemile Gulch wind through the arid plains. A scattering of seasonal lakes and ponds dots the basin floor, reflecting a landscape shaped by internal drainage and high mineral content.

Industrial and natural landmarks appear throughout the survey, including active Sand Dunes and a solitary Gravel Pit near the eastern margin. The presence of numerous wells indicates the region's historical reliance on groundwater management and exploration. This 1986 provisional edition provides a detailed record of the physical geography of the high plateau before modern environmental changes, offering researchers a precise look at the land's surface features and dry-wash networks.