Williamstown Lake Dam
Williamstown Lake Dam is an earth dam located in Grant County, Kentucky, built in 1957. It carries a Significant hazard potential classification and has a fair condition assessment.
About Williamstown Lake Dam
The primary purpose of Williamstown Lake Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Williamstown (local government). It impounds the Grassy Creek near Demossville.
The dam stands 62 feet tall and stretches 680 feet across, creates a reservoir covering 300 acres, has a maximum storage capacity of 8,600 acre-feet, and collects water from a drainage area of 8 square miles. 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. 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 09/12/2024.
At 62 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Kentucky |
| County | Grant |
| Nearest City | Demossville |
| River/Stream | Grassy Creek |
| Coordinates | 38.67809, -84.51920 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 62 ft |
| Dam Height | 62 ft |
| Dam Length | 680 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 8,600 acre-ft |
| Max Storage | 8,600 acre-ft |
| Normal Storage | 6,200 acre-ft |
| Surface Area | 300 acres |
| Drainage Area | 8 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF WILLIAMSTOWN |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/12/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KY00080 |
| Federal ID | KY00080 |
| More Info | State Dam Safety Program |