Landmark Lake Dam is an earth dam located in Pulaski County, Arkansas, built in 1957. It carries a Significant hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 360 ft long. 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 Landmark Lake Dam
The primary purpose of Landmark Lake Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Martin Robinson (private). It impounds the Treadway Branch Ne.
The dam stands 18 feet tall and stretches 360 feet across, and has a maximum storage capacity of 58 acre-feet. Completed in 1957, 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 | Pulaski |
| Nearest City | None |
| River/Stream | Treadway Branch Ne |
| Coordinates | 34.60500, -92.32333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Length | 360 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 58 acre-ft |
| Max Storage | 58 acre-ft |
| Normal Storage | 37 acre-ft |
| Max Discharge | 25 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Martin Robinson |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR00132 |
| Federal ID | AR00132 |
| More Info | State Dam Safety Program |