The Magma Copper Mine AC system designed by the Carrier Corporation was the first underground mechanical air conditioning system in North America. The initial installation of refrigerated cooling equipment in the Magma Mine at Superior, Arizona was necessary due to the increase in temperature lower into the mine. Below the 2000-foot level, the increase in rock temperature is approximately 1½ degrees F. per 100 feet of depth. The rock temperature on the 2000-foot level is 109°.
AZ
The first wave pool in North America to consistently generate 3-5 foot spilling waves suitable for surfing
Big Surf Waterpark uses 15 gates that empty water into a 2.5 acre lagoon with contours that replicate a natural beach. Waves are produced by pumping water to a pre-selected height and released through underwater gates. The water released breaks over a baffle (similar to a natural reef), forming one wave per cycle. Water is recirculated to the lagoon through pumps.
YearAdded:
Image Caption: Designed by Phil Dexter, the facility uses 15 gates that empty water from a reservoir into a 2.5 million gallon lagoon with contours that replicate a natural beach.
2013
The first electric power generated by the Theodore Roosevelt Dam for commercial use was transmitted over a high-voltage line to Phoenix, where it was employed to operate the city's new streetcar system.
YearAdded:
Image Credit: Courtesy Bureau of Reclamation (CC BY-SA 2.0)Image Caption: Theodore Roosevelt DamEra_date_from: 1911
1970
Navajo Bridge spans Marble Canyon, 470 feet above the Colorado River in Grand Canyon National Park. It was considered the highest steel arch bridge in America when completed.
The Navajo Bridge (also known as the Grand Canyon Bridge) was built in 1929 by the Arizona Highway Department and provided a vital transportation link over the Grand Canyon between northern Arizona and southern Utah. Construction commenced by building on one side of the canyon, then on the other, until the two sides met in the middle.
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Image Credit: Courtesy Flickr/Frank Kovalchek (CC BY 2.0)Image Caption: Navajo BridgeEra_date_from: 1929
1997
In 1918, the U.S. Reclamation Service's director and chief engineer Arthur P. Davis proposed a dam of unprecedented height to control the devastating floods on the Colorado River, generate hydroelectric power, and store the river's ample waters for irrigation and other uses.
YearAdded:
Image Credit: Courtesy of Flickr/JoshBerglund19 (CC BY 2.0)Image Caption: Hoover DamEra_date_from: 1935
1984
Developed by the Hohokam, a prehistoric group of Native Americans, the canal system in the Salt River Valley serviced more than 100,000 acres of mostly arid desert country in what is now southern Arizona. The prehistoric Hohokam constructed one of the largest and most sophisticated irrigation networks ever created using pre-industrial technology.
YearAdded:
Image Credit: Courtesy Flickr/Dave Hogg (CC BY 2.0)Image Caption: The Hohokam irrigation system included some 700 miles of canals.Era_date_from: 600
1992
Fossil Creek meanders ten miles to the Verde River, dropping some 1,600 feet during its course and, at the turn of the century, enticed miners in the copper-rich Irving area to use a new technology -- hydroelectric power. A seven-mile series of flumes brings the water from a dam below Fossil Spring to the Irving Plant and then to Stehr Lake.
YearAdded:
Image Credit: Original Image: Public Domain (National Park Service)Image Caption: Childs-Irving Hydroelectric ProjectEra_date_from: 1909
1976
Innovations
Fossil Creek meanders ten miles to the Verde River, dropping some 1,600 feet during its course and, at the turn of the century, enticed miners in the copper-rich Irving area to use a new technology -- hydroelectric power. A seven-mile series of flumes brings the water from a dam below Fossil Spring… Read More
Developed by the Hohokam, a prehistoric group of Native Americans, the canal system in the Salt River Valley serviced more than 100,000 acres of mostly arid desert country in what is now southern Arizona. The prehistoric Hohokam constructed one of the largest and most sophisticated irrigation…
Read More
In 1918, the U.S. Reclamation Service's director and chief engineer Arthur P. Davis proposed a dam of unprecedented height to control the devastating floods on the Colorado River, generate hydroelectric power, and store the river's ample waters for irrigation and other uses. A dam project of…
Read More
Navajo Bridge spans Marble Canyon, 470 feet above the Colorado River in Grand Canyon National Park. It was considered the highest steel arch bridge in America when completed.
The Navajo Bridge (also known as the Grand Canyon Bridge) was built in 1929 by the Arizona Highway Department and…
Read More
The first electric power generated by the Theodore Roosevelt Dam for commercial use was transmitted over a high-voltage line to Phoenix, where it was employed to operate the city's new streetcar system.
The Salt River Project, including the Theodore Roosevelt Dam, was the first major…
Read More
The first wave pool in North America to consistently generate 3-5 foot spilling waves suitable for surfing
Big Surf Waterpark uses 15 gates that empty water into a 2.5 acre lagoon with contours…
Read More
The Magma Copper Mine AC system designed by the Carrier Corporation was the first underground mechanical air conditioning system in North America. The initial installation of refrigerated cooling equipment in the Magma Mine at Superior, Arizona was necessary due to the increase in temperature…
Read More