2015 Map of Dunnigan

About this map

Dunnigan sits at the base of the Dunnigan Hills in the northern Sacramento Valley, serving as a focal point for the agricultural and transportation networks of western Yolo and Colusa counties. This mid-2010s survey illustrates a landscape dominated by complex water management, where the Colusa Basin Drainage Canal and the Tehama-Colusa Canal navigate the flat basin floor alongside the Wilkins Slough Main Irrigation Canal. The grid of rural roads, such as Johns School Rd and Poundstone Rd, connects remote agricultural holdings and historical sites like the Johns Cemetery. The geography reveals the transition from the rising slopes of Howells Point Ridge to the irrigation-heavy bottomlands, where Clarks Ditch and the Main Drain channel water through large-scale farm plots near the settlement of Hershey.