SNOFLO
 


RIGGS FLAT

RESERVOIR LEVELS
Rock Dam Grant Creek - Tr
May 8, 2025


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Riggs Flat is a state-regulated water resource located in Graham, Arizona, with a primary purpose of recreation. The dam, completed in 1951, stands at a height of 45 feet and has a storage capacity of 155 acre-feet. The reservoir covers an area of 11 acres and is fed by Grant Creek, providing a tranquil setting for outdoor enthusiasts to enjoy water-based activities.

Managed by the Arizona Department of Water Resources, Riggs Flat has a low hazard potential and is categorized as having a moderate risk level. The dam features an uncontrolled spillway with a width of 20 feet, capable of handling a maximum discharge of 400 cubic feet per second. The structure is inspected every five years, with the last assessment conducted in December 2013.

With its scenic location and recreational opportunities, Riggs Flat serves as a popular destination for those interested in water resources and climate. Visitors can experience the beauty of the surrounding landscape while appreciating the engineering feat of the earth dam that creates this peaceful reservoir in the heart of Arizona's natural beauty.

Year_Completed 1951
Dam_Height 45
River_Or_Stream GRANT CREEK - TR
Dam_Length 390
Primary_Dam_Type Earth
Surface_Area 11
Hydraulic_Height 45
Drainage_Area 0.55
Nid_Storage 155
Hazard_Potential Low
Foundations Rock
Nid_Height 45
       

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