Lake Overcup Dam is an earth dam located in Logan County, Arkansas, built in 1963. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 5,200 ft long, taller than 55% 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 Lake Overcup Dam
The primary purpose of Lake Overcup Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Arkansas Game and Fish Commission (state). It impounds the Overcup Creek near Morrilton.
The dam stands 26 feet tall and stretches 5,200 feet across, creates a reservoir covering 1,025 acres, has a maximum storage capacity of 12,000 acre-feet, and collects water from a drainage area of 16 square miles. Completed in 1963, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/12/2025.
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Location
| State | Arkansas |
| County | Logan |
| Nearest City | Morrilton |
| River/Stream | Overcup Creek |
| Coordinates | 35.19833, -93.73333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 5,200 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 12,000 acre-ft |
| Max Storage | 12,000 acre-ft |
| Normal Storage | 6,000 acre-ft |
| Surface Area | 1,025 acres |
| Drainage Area | 16 sq mi |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Arkansas Game and Fish Commission |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/12/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR00356 |
| Federal ID | AR00356 |
| More Info | State Dam Safety Program |