SNOFLO



OLGA DETENTION DAM

RESERVOIR LEVELS
Unlisted/Unknown Dam San Simon River
April 24, 2025


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Olga Detention Dam, located in Solomon, Arizona, plays a crucial role in flood risk reduction along the San Simon River. Built in 1940 by the Bureau of Land Management, this gravity-type dam stands at a structural height of 25 feet and has a hydraulic height of 19 feet, with a length of 1300 feet. With a maximum storage capacity of 151 acre-feet and a normal storage level of 90.81 acre-feet, the dam covers a surface area of 23.37 acres and serves a drainage area of 2.02 square miles.

Despite its important function, Olga Detention Dam is rated with a low hazard potential and poor condition assessment. The last inspection took place in 2007, indicating a need for regular maintenance and upkeep. While the dam has not been modified in recent years, its emergency action plan status, risk assessment, and management measures require attention. With a moderate risk rating, it is essential for stakeholders to ensure that the dam's safety and functionality are maintained to protect the surrounding community and environment from potential flood events.

As a federally owned structure under the jurisdiction of the Bureau of Land Management, Olga Detention Dam stands as a testament to the collaborative efforts in water resource management. With its history dating back over eight decades, the dam continues to serve as a vital asset in safeguarding the area against flooding while highlighting the importance of ongoing monitoring and maintenance to ensure its long-term effectiveness.

Year_Completed 1940
River_Or_Stream SAN SIMON RIVER
Dam_Length 1300
Primary_Dam_Type Gravity
Surface_Area 23.37
Hydraulic_Height 19
Drainage_Area 2.02
Nid_Storage 151
Structural_Height 25
Hazard_Potential Low
Foundations Unlisted/Unknown
Nid_Height 25
       

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