Lake Grampus Dam is an earth dam located in Ashley County, Arkansas, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 508 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 Lake Grampus Dam
The primary purpose of Lake Grampus Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Arkansas Game and Fish Commission (state). It impounds the Bayou Bartholomew-tr near Portland.
The dam stands 16 feet tall and stretches 508 feet across, and has a maximum storage capacity of 1,320 acre-feet. Completed in 1968, the structure is well into its service life at over 50 years old.
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 | Ashley |
| Nearest City | Portland |
| River/Stream | Bayou Bartholomew-tr |
| Coordinates | 33.34000, -91.55167 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 508 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 1,320 acre-ft |
| Max Storage | 1,320 acre-ft |
| Normal Storage | 960 acre-ft |
| Max Discharge | 192 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Arkansas Game and Fish Commission |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AR00685 |
| Federal ID | AR00685 |
| More Info | State Dam Safety Program |