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1990 Map of Clarence Cannon Dam

Name: 1990 Topographic Map of Clarence Cannon Dam
Creator: U.S. Geological Survey
Published: 1995
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1995

About this map

The Mark Twain Lake reservoir dominates this landscape, created by the massive Clarence Cannon Dam across the Salt River. This 1990 revision, based on cooperation with the U.S. Corps of Engineers, shows the flooded valleys where the river once wound through Ralls and Monroe counties. The intricate shoreline now covers much of the drainage area for Little Indian Creek and Madden Branch, though smaller upland features remain visible.

Genealogists and local historians can locate several family-named landmarks that survived the inundation, including the Utterback Cem and various unnamed Cem sites. The map documents the dramatic transition of the terrain from a river-and-creek system to a major recreational and hydroelectric reservoir, while preserving the original creek names like Rocklick Branch and Sandy Creek that once defined these rural Missouri townships.