Montezuma Hills

The Montezuma Hills form a small range of low-elevation hills at the northern banks of the Sacramento River Delta in Solano County, California. The hills are known for their exceptional wind energy resource potential which has made them the site of a rapidly expanding wind farm that now comprises hundreds of wind turbines, with another 88 pending approval¹. Rio Vista is the nearest city, while Travis Air Force Base is about 10 miles northwest of the Montezuma Hills.

Natural features

A 21st century windfarm in the Montezuma Hills, Solano County, California. Some of these wind turbines are 415ft tall, making them the tallest turbines in the United States (as of 2006).

The flora and fauna of the Montezuma Hills has been studied extensively beginning in 1988 with the Earth Metrics Environmental Impact Report for proposed wind energy development.^[1][2] and continuing with subsequent analyses<"Wind Turbine Effects on Avian Activity, Habitat Use, and Mortality in Altamont Pass and Montezuma Hills", 1993, Sacreamento Municipal Utility District, Prepared for the California Energy Commission</ref>^[3][4] that collectively have led to a compreshensive characterization of the local biological resources, plant communities and wildlife habitat. The Montezuma Hills are bounded by the Sacramento River on the south and east; the Montezuma Slough on the west and roughly by California Highway 12 on the north. The peaks of these rolling hills vary in height from about 50 to 85 meters. In general there is little remaining native vegetation in the Montezuma Hills due to the historic intensive grazing.^[1][2][3][5] As of the year 2006 the present land uses are primarily dryland farming and sheep grazing. Wetlands cover only a small percentage of the Montezuma Hills, and virtually all of the sparse trees are non-native species associated with the area's farming homesteads. Compared to the Suisun Marsh to the south and west, the Montezuma Hills have a relatively unabundant diversity of avafauna and other wildlife. Among the Montezuma Hills are a number of intermittent drainage swales that flow during winter months; otherwise the monotypic dryland farms support even less diversity of wildlife than more agriculturally diverse land uses to the north. Exceptions to the dearth of wildlife are the considerable populations of ground squirrels and other small rodents, which populations in turn support modest numbers of raptors. Birds present in moderate numbers are the red-winged blackbird, cliff swallow, horned harrier and barn swallow. Moderate numbers of avian nests have been documented in the Montezuma Hills including red-tailed hawk, American kestrel and historic nests of the Golden Eagle

Line notes

References: [1] Shiloh II Wind Project Environmental Impact Report [2] Photos of the Montezuma Hills