Round Mountain Detention Dam 1
Round Mountain Detention Dam 1 is a gravity dam located in Greenlee County, Arizona, built in 1954. It carries a Low hazard potential classification and has a fair condition assessment.
About Round Mountain Detention Dam 1
The primary purpose of Round Mountain Detention Dam 1 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 Round Mountain Draw near Franklin, Az.
The dam stands 22 feet tall and stretches 2,109 feet across, creates a reservoir covering 29 acres, has a maximum storage capacity of 116 acre-feet, and collects water from a drainage area of 19 square miles. Completed in 1954, 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 07/28/2011. That was over 14 years ago.
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Location
| State | Arizona |
| County | Greenlee |
| Nearest City | Franklin, Az |
| River/Stream | Round Mountain Draw |
| Coordinates | 32.52778, -109.14722 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 22 ft |
| Dam Length | 2,109 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 116 acre-ft |
| Max Storage | 116 acre-ft |
| Normal Storage | 48 acre-ft |
| Surface Area | 29 acres |
| Drainage Area | 19 sq mi |
| Max Discharge | 4,424 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/28/2011 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ10345 |
| Federal ID | AZ10345 |
| More Info | State Dam Safety Program |