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1916 Map of Cache Slough

Name: 1916 Topographic Map of Cache Slough
Creator: U.S. Geological Survey
Published: 1916
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1916

About this map

The expansive Yolo Basin dominates this 1906 survey of the California Delta, revealing a landscape defined by an intricate network of waterways before modern reclamation projects fully transformed the region. In the northern sections, the Oakland Antioch and Eastern railroad cuts a straight line across the marshy terrain, providing a vital transport link through the northern Solano and Yolo county boundary.

South of the rail line, the map documents the complex hydrology of the delta, anchored by Cache Slough and its numerous branches like Hass Slough and Prospect Slough. The detailed rendering of Ryer Island, bounded by Miner Slough, illustrates the natural levees and early land divisions of the era. Features like Medora Lake and Little Medora Lake represent the ephemeral water bodies that once characterized this low-lying basin, offering a primary resource for researchers tracking the original environmental state of the Sacramento-San Joaquin River Delta.