1949 Map of Columbia

Industry and transport of the era are visible through features like the Columbia Airport, the Parrotts Ferry Bridge, and numerous quarries including the Marble Quarries near the river. Smaller, named locales such as Squabbletown, Shaws Flat, and La Honda Park highlight the localized nature of community development following the initial gold rush. The map also delineates the Stanislaus National Forest boundary and several reservoirs including Matelot Reservoir and San Diego Reservoir.