Dillon Dam
Dillon Dam is an arch dam located in Garland County, Arkansas, built in 1903. It carries a Significant hazard potential classification and has a poor condition assessment.
About Dillon Dam
The primary purpose of Dillon Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Hot Springs Municipal Water System (local government). It impounds the Bull Bayou-tr near Hot Springs.
The dam stands 44 feet tall and stretches 220 feet across, creates a reservoir covering 43 acres, has a maximum storage capacity of 858 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1903, the structure is over a century 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 07/25/2024.
At 44 feet, this dam is taller than 90% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Arkansas |
| County | Garland |
| Nearest City | Hot Springs |
| River/Stream | Bull Bayou-tr |
| Coordinates | 34.54000, -93.06167 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 220 ft |
| Year Completed | 1903 (123 years old) |
Storage & Hydraulics
| NID Storage | 858 acre-ft |
| Max Storage | 858 acre-ft |
| Normal Storage | 800 acre-ft |
| Surface Area | 43 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 6,200 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Hot Springs Municipal Water System |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 07/25/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR00728 |
| Federal ID | AR00728 |
| More Info | State Dam Safety Program |