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1959 Map of Petaluma Point

Name: 1959 Topographic Map of Petaluma Point
Creator: U.S. Geological Survey
Published: 1960
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1960

About this map

San Pablo Bay dominates this coastal survey, where the mudflats and marshy margins of the North Bay meet the mouths of critical waterways. The shoreline transition is defined by the Petaluma River and Petaluma Creek, showing a landscape of levees and beacons used for maritime navigation. Significant military and transit infrastructure is evident, including the airfield layout of Hamilton Air Force Base and the Northwestern Pacific railroad corridor running through Black Point.

Further south, the geography shifts toward the cultural site of China Camp and the rocky outcrops of Rat Rock. The map illustrates the complex hydrography of the era, from the winding path of Gallinas Creek to the reclaimed lands of Tubbs Island. This document captures the bay before extensive modern development altered the tidal flats and the early Cold War footprint of the military installation at Hamilton Field.