Diamondhead is an earth dam located in Garland County, Arkansas, built in 1974. It carries a Significant hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 470 ft long, taller than 59% 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 Diamondhead
The primary purpose of Diamondhead is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Diamondhead Property Owners Association (private). It impounds the Ouachita River-os.
The dam stands 27 feet tall and stretches 470 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 86 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, 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.
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Location
| State | Arkansas |
| County | Garland |
| Nearest City | None |
| River/Stream | Ouachita River-os |
| Coordinates | 34.43278, -92.95917 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 16 ft |
| Dam Length | 470 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 86 acre-ft |
| Max Storage | 86 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 311 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Diamondhead Property Owners Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR01168 |
| Federal ID | AR01168 |
| More Info | State Dam Safety Program |