Walnut Grove Dam
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Erwin Baer, Prescott, Arizona Unknown 1025-0119-0002.jpg DAMS- 119 B&W 1025-0119-0002 1025-0119-0002 Photo Card Print 5x7 Historic Photographs 1890s Reproduction requires permission. Digital images property of SHM Library & ArchivesDescription
Walnut Grove Dam, located near Walnut Grove, Yavapai County, Arizona. This photo shows survivors of the Walnut Dam break and flood taken sometime after February 21, 1890.
Walnut Grove Dam was built in 1886, or at least it was begun in August of that year and finished in October 1887. The dam was 135 feet thick at the base and 10 feet thick at the top. It was 110 feet long at the base and 400 feet long on top. It was 110 feet high. The waste way was 30 feet wide and 8 feet deep.
The lower, or "service dam," was begun in January or February 1889 and completed in January 1890. This lower dam was 15 miles or so below the upper or storage dam. This dam was about 30 feet high - 60 feet wide at the base - 10 feet wide at the top and 200 feet long on top. It had a waste way that was 60 feet wide.
The lake formed by the upper dam was 2 1/2 miles long , 3/4 mile wide and covered 1100 acres. The water averaging 60 feet in depth. The cost of building was a little over one million dollars.
The dam was destroyed by flood on February 21, 1890, drowning more than 60 people, of whom 43 were found and buried.
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