Mud River Frs No 45 Reservoir Report
Nearby: Mud River Frs 44 Mud River Frs No 43
Last Updated: December 6, 2025
Mud River FRS No 45, also known as Grise Heirs Lake, is a flood risk reduction structure located in Butler, Kentucky.
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Summary
Constructed in 1963 by the Soil Conservation Service, USDA/NRCS, this earth dam stands at a height of 18 feet and spans a length of 680 feet, with a storage capacity of 166 acre-feet. The primary purpose of this dam is flood risk reduction along the Mud River, with a low hazard potential and a satisfactory condition assessment as of May 2017.
Managed by the Kentucky Division of Water, Mud River FRS No 45 is state-regulated, permitted, inspected, and enforced to ensure its operational integrity. The dam serves to protect the surrounding area of Forgys Mill and has a drainage area of 0.92 square miles, with a normal storage capacity of 26.7 acre-feet. Despite its moderate risk assessment level, the dam has not been modified in recent years, and its emergency action plan and risk management measures are currently not updated.
Water resource and climate enthusiasts can appreciate the vital role Mud River FRS No 45 plays in mitigating flood risks along the Mud River in Kentucky. With its historical significance and ongoing state regulation and inspection, this earth dam stands as a testament to the importance of flood risk reduction structures in safeguarding communities and ecosystems from potential water-related hazards.
Year Completed |
1963 |
Dam Length |
680 |
Dam Height |
18 |
River Or Stream |
MUD RIVER |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
0.92 |
Nid Storage |
166 |
Hazard Potential |
Low |
Nid Height |
18 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Green River At Paradise
|
2680cfs |
Pond River Near Apex
|
57cfs |
Barren River At Bowling Green
|
464cfs |
Caney Creek Near Horse Branch
|
47cfs |
Drakes Creek Near Alvaton
|
224cfs |
West Fork Drakes Creek Near Franklin
|
46cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Mud River Frs No 45