Green River Lock And Dam 3
Green River Lock And Dam 3 is an other dam located in Ohio County, Kentucky, built in 1836. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Green River Lock And Dam 3
The primary purpose of Green River Lock And Dam 3 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 Rochester Dam Regional Water Commission (local government). It impounds the Green River near Rochester Kentucky.
The dam stands 27 feet tall and stretches 410 feet across, creates a reservoir covering 2,209 acres, has a maximum storage capacity of 40,070 acre-feet, and collects water from a drainage area of 6,142 square miles. Completed in 1836, the structure is one of the older dams in the region, with over a century and a half of service.
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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/21/2025.
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Location
| State | Kentucky |
| County | Ohio |
| Nearest City | Rochester Kentucky |
| River/Stream | Green River |
| Coordinates | 37.21382, -86.90006 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 27 ft |
| Dam Length | 410 ft |
| Year Completed | 1836 (190 years old) |
Storage & Hydraulics
| NID Storage | 40,070 acre-ft |
| Max Storage | 40,070 acre-ft |
| Normal Storage | 13,254 acre-ft |
| Surface Area | 2,209 acres |
| Drainage Area | 6,142 sq mi |
| Max Discharge | 9,000 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Rochester Dam Regional Water Commission |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/21/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | KY03004 |
| Federal ID | KY03004 |
| More Info | State Dam Safety Program |