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2012 Map of Monticello Dam

Name: 2012 Topographic Map of Monticello Dam
Creator: U.S. Geological Survey
Published: 2012
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2012

About this map

Monticello Dam stands as the central engineering feat in this 2012 survey, holding back the eastern edge of Lake Berryessa where the water funnels into Putah Cr. The landscape transitions from the massive reservoir into the steep, confined walls of Devils Gate and Thompson Canyon. This area is characterized by significant topographic relief, featuring prominent summits like Edgar Peak and Wild Cow Mountain, which overlook a network of seasonal drainages including Chickahominy Slough and Union School Slough.

Beyond the water infrastructure, the map details the local agricultural footprint through family-named holdings such as Scott Ranch, Cowell Ranch, and Chapmans Upper Ranch. Numerous natural springs, such as Adobe Spring and Grapevine Spring, are mapped along the eastern slopes of Crane Ridge, indicating the vital water sources that supported these upland ranches and canyons like Cold Canyon and Bray Canyon before they descend toward the Sacramento Valley floor.