Morrison Onan Farm Dam Reservoir Report
Nearby: Sam Smith Dam Aw Tate Dam
Last Updated: December 5, 2025
Morrison Onan Farm Dam, also known as Onan Farm Lake, is a private-owned water resource located in the Rineltown area of Washington County, Kentucky.
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Summary
Built in 1967 by the Soil Conservation Service, this Earth-type dam stands at 26 feet tall and spans a length of 424 feet, with a storage capacity of 56 acre-feet for irrigation purposes. The dam is regulated by the Kentucky Division of Water and has a low hazard potential, with a moderate risk assessment rating.
The dam is situated on Mill Creek offstream and serves as a crucial water source for the surrounding agricultural lands. Despite its age, the condition of the dam is not rated, and it has not been inspected since 2004. The dam features an uncontrolled spillway type, and while it meets state regulatory standards, there are no emergency action plans in place. With a drainage area of 0.06 square miles and a normal storage capacity of 37 acre-feet, the Morrison Onan Farm Dam plays a vital role in sustaining local water resources for irrigation purposes in the region.
As a key structure in the water management system of Kentucky, the Morrison Onan Farm Dam represents a blend of historical significance and practical utility. Although it has not undergone recent inspections or condition assessments, the dam continues to provide essential irrigation water to the agricultural community in the Rineltown area. With its moderate risk assessment rating and low hazard potential, the dam stands as a testament to the importance of maintaining and monitoring water resources to ensure their safety and sustainability for future generations.
Year Completed |
1967 |
Dam Length |
424 |
Dam Height |
26 |
River Or Stream |
MILL CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.06 |
Nid Storage |
56 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Beech Fork At Maud
|
101cfs |
Beech Fork At Bardstown
|
177cfs |
Salt River At Glensboro
|
70cfs |
Kentucky River At Lock 6 Near Salvisa
|
5420cfs |
Kentucky River At Lock 7 At Highbridge
|
5960cfs |
Brashears Creek At Taylorsville
|
144cfs |
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.
Morrison Onan Farm Dam