Loading map...

2015 Map of Twitchell Dam

Name: 2015 Topographic Map of Twitchell Dam
Creator: U.S. Geological Survey
Published: 2015
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2015

About this map

Twitchell Dam and its adjacent Twitchell Reservoir dominate the northern terrain of this central coast landscape, regulating the seasonal flows of the Cuyama River. This 2015 survey illustrates the sharp transition from the steep, ridged topography of the Sierra Madre Mountains and Los Coches Mtn in the east to the broad alluvial plains of the Santa Maria Valley. The confluence of the Cuyama and Sisquoc River systems provides the hydrological foundation for the region's agricultural layout.

In the southwest, the outskirts of Santa Maria and the settlement of Garey mark the intersection of rural residential development and intensive farming. A network of local roads including Foxen Canyon Rd, Ontiveros Ln, and Dominion Rd weave through the drainage of Bradley Canyon, tracing a landscape shaped by both natural canyons like Cañada De Los Coches and the jurisdictional boundary between Santa Barbara and San Luis Obispo counties.