San Simon Barrier Structure Detention Dam is a gravity dam located in Graham County, Arizona, built in 1980. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 4,214 ft long, taller than 72% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About San Simon Barrier Structure Detention Dam
The primary purpose of San Simon Barrier Structure Detention Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Doi BLM (federal). It impounds the San Simon River near Solomon, Az.
The dam stands 31 feet tall and stretches 4,214 feet across, creates a reservoir covering 290 acres, has a maximum storage capacity of 1,659 acre-feet, and collects water from a drainage area of 2,192 square miles. Completed in 1980, the structure is 46 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 05/22/2013. That was over 13 years ago.
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Location
| State | Arizona |
| County | Graham |
| Nearest City | Solomon, Az |
| River/Stream | San Simon River |
| Coordinates | 32.77974, -109.61141 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 31 ft |
| Dam Length | 4,214 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 1,659 acre-ft |
| Max Storage | 1,659 acre-ft |
| Surface Area | 290 acres |
| Drainage Area | 2,192 sq mi |
| Max Discharge | 22,960 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/22/2013 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ20025 |
| Federal ID | AZ20025 |
| More Info | State Dam Safety Program |