Loading map...

2018 Map of Delta Ranch

Name: 2018 Topographic Map of Delta Ranch
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

The San Joaquin Valley is defined by a dense network of water management features in this portion of Merced County, centered on the unincorporated community of Dos Palos Y. The landscape is a complex intersection of natural watercourses and engineered irrigation, where the San Joaquin River and Salt Slough meet an intricate system of canals and ditches. Prominent agricultural arteries like the Colony Main Canal, Dos Palos Canal, and the Arroyo Canal partition the land into productive blocks, reflecting the region's long-standing reliance on reclaimed marshland.

Near the northern edge, Turner Island sits between the river and various sloughs, while the southern reaches are marked by the Santa Fe Grade and the marshy expanse of Big Water Lake. Local history and land use are visible through named family or ranching landmarks such as Delta Ranch, along with specialized infrastructure like the Toscano Ditch and Tambellini Ditch. This geography illustrates the mid-20th-century transition of the Central Valley into a highly controlled hydraulic environment.