Iverson Detention Dam
Iverson Detention Dam is a gravity dam located in Mohave County, Arizona, built in 1959. It carries a Low hazard potential classification and has a poor condition assessment.
About Iverson Detention Dam
The primary purpose of Iverson Detention Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Doi Blm (federal). It impounds the Hurricane Valley Tributary near Saint George, Utah.
The dam stands 25 feet tall and stretches 750 feet across, creates a reservoir covering 257 acres, has a maximum storage capacity of 2,400 acre-feet, and collects water from a drainage area of 84 square miles. Completed in 1959, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 07/29/2003. That was over 22 years ago.
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Location
| State | Arizona |
| County | Mohave |
| Nearest City | Saint George, Utah |
| River/Stream | Hurricane Valley Tributary |
| Coordinates | 36.51663, -113.35593 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 25 ft |
| Dam Length | 750 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 2,400 acre-ft |
| Max Storage | 2,400 acre-ft |
| Normal Storage | 1,843 acre-ft |
| Surface Area | 257 acres |
| Drainage Area | 84 sq mi |
| Max Discharge | 2,850 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 07/29/2003 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ20016 |
| Federal ID | AZ20016 |
| More Info | State Dam Safety Program |