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Imperial County

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Imperial County, California, United States (33.03055 -115.35957)

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Name: Imperial County topographic map, elevation, relief.
Coordinates: 32.61842 -116.10628 33.43383 -114.46279
Minimum elevation: -230 ft
Maximum elevation: 10,571 ft
Average elevation: 1,355 ft

Imperial County

Fort Yuma is located on the banks of the Colorado River in Winterhaven, California. First established after the end of the Mexican–American War in 1848, it was originally located in the bottoms near the Colorado River, less than 1 mile (1.6 km) below the mouth of the Gila River. It was to defend the newly settled community of Yuma, Arizona on the other side of the Colorado River and the nearby Mexican border. In March 1851 the post was moved to a small elevation on the Colorado's west bank, opposite the present city of Yuma, Arizona, on the site of the former Mission Puerto de Purísima Concepción. This site had been occupied by Camp Calhoun, named for John C. Calhoun, established in 1849. Fort Yuma was established to protect the southern emigrant travel route to California and to attempt control of the Yuma Indians in the surrounding 100-mile (160 km) area.

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