Ryan Detention Dam is a gravity dam located in Graham County, Arizona, built in 1967. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 37 ft37 ft tall and 2,000 ft long, taller than 83% 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 Ryan Detention Dam
The primary purpose of Ryan 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 Ryan Draw near Solomon, Az.
The dam stands 37 feet tall and stretches 2,000 feet across, creates a reservoir covering 38 acres, and has a maximum storage capacity of 435 acre-feet. Completed in 1967, 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 07/09/2015. That was over 11 years ago.
At 37 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | Arizona |
| County | Graham |
| Nearest City | Solomon, Az |
| River/Stream | Ryan Draw |
| Coordinates | 32.49546, -109.44894 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 37 ft |
| Dam Length | 2,000 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 435 acre-ft |
| Max Storage | 435 acre-ft |
| Surface Area | 38 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/09/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ20024 |
| Federal ID | AZ20024 |
| More Info | State Dam Safety Program |