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Granite Reef Diversion Dam

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Dam located northeast of Phoenix, Arizona, United States
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Dam
Granite Reef Dam
Arizona Dam in c. 1903
Granite Reef Diversion Dam is located in ArizonaGranite Reef Diversion DamLocation of Granite Reef Dam in ArizonaShow map of ArizonaGranite Reef Diversion Dam is located in the United StatesGranite Reef Diversion DamGranite Reef Diversion Dam (the United States)Show map of the United States
Official nameGranite Reef Diversion Dam
Coordinates33°30′58″N 111°41′28″W / 33.51611°N 111.69111°W / 33.51611; -111.69111
PurposeIrrigation
Construction began1906
Opening date1908
Dam and spillways
Height (foundation)29 feet (8.8 m)
Length1,128 feet (344 m)
Dam volume35,000 cubic yards (27,000 m)
Aerial view of the dam, river, and canals in 2018

The Granite Reef Diversion Dam is a concrete diversion dam located 22 miles (35 km) Northeast of Phoenix, Arizona. It impounds the Salt River for irrigation purposes. If it were to overflow, more than half of the Yavapai Reservation would be flooded.

The dam diverts nearly all water from the Salt River into the Arizona and South Canals, which serve metropolitan Phoenix with irrigation and drinking water. The Salt River below Granite Reef is usually dry except following consistent and heavy upstream precipitation. When upstream lakes are full, minor and moderate releases are accomplished via floodgates at either end of the dam. The dam is designed to be overtopped by major releases, which can occur every 10 to 40 years.

The dam is 1,128 feet (344 m) long, 29 feet (8.8 m) high. Its volume is 35,000 cubic yards (27,000 m).

The United States Bureau of Reclamation built the dam between 1906 and 1908 to replace Arizona Dam washed out in 1905. It is operated by the Salt River Project, an electric cooperative.

References

  1. ^ "Granite Reef Diversion Dam". United States Bureau of Reclamation. Retrieved 2018-12-30.
  2. "Granite Reef Diversion Dam". Salt River Project electric cooperative. Retrieved 30 December 2018.

External links

Dams on the Salt River
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