Granite Reef: (Satellite)
Nov 1, 2026, flood
Stewart Mountain Dam
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| Mark Anderson posted Stewart Mountain Dam releasing water Erik Seineke: Great capture, any Down Stream info for damage? Mark Anderson: Erik Seineke Phon D Sutton is underwater. Same with Granite Reef. There was a car inundated in the Granite Reef lot. Not sure on the diversion dam. I didn’t follow it to the Gila confluence. Jeanie Simmons: Mark Anderson There was a post saying the car belongs to the elderly couple that drowned in the river at the start of flooding. 😞 |
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| usbr "On the Salt River 41 miles northeast of Phoenix, Stewart Mountain Dam created Saguaro Lake, a 69,765 acre-foot capacity reservoir. The dam is a concrete thin-arch structure, 207 feet high, with gravity abutments. When built by the Salt River Valley Water Users' Association from 1928-1930, the dam included an open, super-elevated channel spillway equipped with radial gates. "The spillway was modified by Reclamation in 1936. The work consisted of building a concrete-lined spillway discharge channel, 450 feet long by 265 feet wide, below the existing ogee spillway; reconditioning the hoisting equipment for the radial gates; and installing individual gate operating motors and two 10-kilovolt-ampere gasoline-engine driven generators. "From 1988 to 1992, the dam was again modified by Reclamation, to meet concerns about its stability in a probable maximum flood or maximum credible earthquake. To address PMF concerns, a new spillway was constructed on the dam`s right abutment to increase its ability to safely release flood waters. As part of earthquake protection measures, a new concrete overlay was placed over areas on the right and left abutments to improve the dam`s stability. The existing power penstock and river outlet works were also replaced, the road on the top of the dam was raised and widened, and the existing left spillway and spillway wall was modified. In addition, drainage holes were drilled at selected locations in the dam`s foundation to help relieve hydraulic uplift pressures, and some areas of the foundation were grouted to help reduce seepage. Finally, 84 steel cables were installed through the dam and into its foundation to strengthen it." |
Granite Reef Diversion Dam
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| usbr "Granite Reef Diversion Dam is located about 4 miles downstream of the confluence of the Salt and Verde Rivers and about 22 miles east of Phoenix. The dam was constructed between 1906 and 1908 by Reclamation to divert water released from storage dams on the Salt and Verde Rivers to Salt River Project canals. The Arizona Canal serves the north side of the project; the South Canal serves the south side. From these two main canals, water is diverted to secondary canals, then to laterals through which water is delivered to farms, cities, and Indian tribes. "The dam is 1,128 feet long, and 29 feet high. The sluiceway contains four 15-by-9-foot slide gates onthe North Side Canal, and two 15-by-9-foot slide gates on the South Side Canal. The North Side Canal headworks contain eighteen 7-by-5-foot slide gates, while the South Side headworks contain nine of these gates." |
The shows the water supply canals on the north and south side of the Salt River.
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