Hillman Reservoir Dam is an earth dam located in Arkansas County, Arkansas, built in 1946. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 860 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 Hillman Reservoir Dam
The primary purpose of Hillman Reservoir 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 F E Hillman (private). It impounds the Little La Grue Bayou near De Witt.
The dam stands 12 feet tall and stretches 860 feet across, and has a maximum storage capacity of 208 acre-feet. Completed in 1946, 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.
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Location
| State | Arkansas |
| County | Arkansas |
| Nearest City | De Witt |
| River/Stream | Little La Grue Bayou |
| Coordinates | 34.37333, -91.38028 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Length | 860 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 208 acre-ft |
| Max Storage | 208 acre-ft |
| Normal Storage | 160 acre-ft |
| Max Discharge | 424 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | F E Hillman |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR01029 |
| Federal ID | AR01029 |
| More Info | State Dam Safety Program |