Round Mountain Detention Dam 3
Round Mountain Detention Dam 3 is a gravity dam located in Hidalgo County, New Mexico, built in 1956. It carries a Low hazard potential classification and has a fair condition assessment.
About Round Mountain Detention Dam 3
The primary purpose of Round Mountain Detention Dam 3 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 Railroad Wash near Duncan, Az.
The dam stands 41 feet tall and stretches 1,176 feet across, creates a reservoir covering 64 acres, has a maximum storage capacity of 167 acre-feet, and collects water from a drainage area of 36 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 07/20/2015. That was over 10 years ago.
At 41 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | New Mexico |
| County | Hidalgo |
| Nearest City | Duncan, Az |
| River/Stream | Railroad Wash |
| Coordinates | 32.57367, -109.04344 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 41 ft |
| Dam Length | 1,176 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 460 acre-ft |
| Max Storage | 167 acre-ft |
| Normal Storage | 460 acre-ft |
| Surface Area | 64 acres |
| Drainage Area | 36 sq mi |
| Max Discharge | 1,918 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/20/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NM00119 |
| Federal ID | NM00119 |
| More Info | State Dam Safety Program |