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1953 Map of Tassajara

Name: 1953 Topographic Map of Tassajara
Creator: U.S. Geological Survey
Published: 1963
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1963

About this map

Morgan Territory and the Black Hills dominate the topography of this 1950s survey, a landscape defined by deep drainages and cattle-ranching infrastructure. The small settlement of Tassajara sits at the junction of Tassajara Road and Highland Road, serving as a central point for the surrounding rural community. Evidence of shifting social patterns is visible in the presence of Tassajara Sch and Highland Sch, both marked as abandoned by 1953, reflecting the consolidation of rural school districts during this era.

Water management is a primary theme of the terrain, with numerous windmills and reservoirs scattered across the hills to support livestock. The map also delineates historical land divisions, most notably the Las Positas Grant Boundary, which cuts across the southern portion of the sheet. From the winding course of Marsh Creek in the north to the canyon systems of Collier Canyon and Doolan Canyon in the south, the sheet provides a detailed look at the interface between private ranch lands and the steep ridges of the East Bay interior.