Judy Wash Retarding Dam is an earth dam located in Graham County, Arizona, built in 1957. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 790 ft long, taller than 68% 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 Judy Wash Retarding Dam
The primary purpose of Judy Wash Retarding 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 Blm;san Jose Canal Co (gila Valley Irrigation District) (federal). It impounds the Judy Wash near Solomon, Az.
The dam stands 30 feet tall and stretches 790 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 310 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1957, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 04/07/2022.
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Location
| State | Arizona |
| County | Graham |
| Nearest City | Solomon, Az |
| River/Stream | Judy Wash |
| Coordinates | 32.80543, -109.61315 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 21 ft |
| Dam Length | 790 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 310 acre-ft |
| Max Storage | 310 acre-ft |
| Normal Storage | 159 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 9,300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Blm;san Jose Canal Co (gila Valley Irrigation District) |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 04/07/2022 |
| Emergency Action Plan | No |
Identifiers
| NID ID | AZ00070 |
| Federal ID | AZ00070 |
| More Info | State Dam Safety Program |