Hx Detention Dam is a dam located in Graham County, Arizona, built in 1956. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 35 ft35 ft tall and 3,600 ft long, taller than 80% 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 embankment section and the water level is illustrative.
About Hx Detention Dam
The primary purpose of Hx 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 Gold Gulch near Solomon, Az.
The dam stands 35 feet tall and stretches 3,600 feet across, creates a reservoir covering 265 acres, has a maximum storage capacity of 1,600 acre-feet, and collects water from a drainage area of 147 square miles. Completed in 1956, the structure is well into its service life at over 50 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 07/28/2014. That was over 12 years ago.
At 35 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Arizona |
| County | Graham |
| Nearest City | Solomon, Az |
| River/Stream | Gold Gulch |
| Coordinates | 32.44491, -109.50832 |
Physical Characteristics
| NID Height | 35 ft |
| Dam Length | 3,600 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 1,660 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 1,660 acre-ft |
| Surface Area | 265 acres |
| Drainage Area | 147 sq mi |
| Max Discharge | 3,578 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/28/2014 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ20015 |
| Federal ID | AZ20015 |
| More Info | State Dam Safety Program |