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1959 Map of Petaluma Point

Name: 1959 Topographic Map of Petaluma Point
Creator: U.S. Geological Survey
Published: 1975
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1975

About this map

San Pablo Bay dominates this coastal survey, where the marshy transition from open water to solid ground is defined by extensive mudflats and tidal channels. To the west, Hamilton Air Force Base sits behind a complex system of levees, its infrastructure including a Rescue Tower and various pipelines. The north is anchored by the mouth of the Petaluma River, where Black Point and Day Island stand as high ground among the marshes.

Industry and transport hug the shoreline, with the Northwestern Pacific railroad corridor passing through the northwestern corner near Petaluma Creek. In the south, the map captures the northern edges of San Rafael and the historic China Camp fishing site, located within the San Pedro Santa Margarita y Las Gallinas land grant area. This document provides an essential view of the bay's hydrology and land use before late-century conservation and development changes.