Mammoth Springs Dam 3 is a concrete dam located in Fulton County, Arkansas, built in 1930. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 700 ft long, taller than 68% 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 concrete gravity section and the water level is illustrative.
About Mammoth Springs Dam 3
The primary purpose of Mammoth Springs Dam 3 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 Spring River.
The dam stands 30 feet tall and stretches 700 feet across, creates a reservoir covering 109 acres, has a maximum storage capacity of 350 acre-feet, and collects water from a drainage area of 20 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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 08/20/2025.
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Location
| State | Arkansas |
| County | Fulton |
| Nearest City | None |
| River/Stream | Spring River |
| Coordinates | 36.46667, -91.53000 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 700 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 350 acre-ft |
| Max Storage | 350 acre-ft |
| Normal Storage | 327 acre-ft |
| Surface Area | 109 acres |
| Drainage Area | 20 sq mi |
| Max Discharge | 4,200 cfs |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Arkansas Game and Fish Commission |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/20/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR01157 |
| Federal ID | AR01157 |
| More Info | State Dam Safety Program |