Hieronymous Reservoir Report
Nearby: Miller W.N. Oklahoma State Of
Last Updated: December 19, 2025
Hieronymous is a private earth dam located in Harper County, Oklahoma, near the city of Laverne.
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Summary
Built by the USDA NRCS, this dam on Buffalo Creek has a height of 25 feet and a storage capacity of 30 acre-feet. While it serves a primary purpose not specified in the data, it has a low hazard potential and a moderate risk assessment score of 3.
Managed by the Natural Resources Conservation Service, Hieronymous does not fall under state jurisdiction or regulation. Despite its uncontrolled spillway type and lack of inspection history or emergency action plan, the dam is deemed to be in "Not Rated" condition. With its location in a rural area and minimal associated structures, Hieronymous remains a lesser-known but important water resource in the region for climate and water resource enthusiasts to explore.
Dam Height |
25 |
River Or Stream |
BUFFALO CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
25 |
Nid Storage |
30 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cimarron R Near Buttermilk
|
46cfs |
Bluff Creek Nr Buttermilk
|
41cfs |
Cimarron River Near Buffalo
|
73cfs |
Crooked C Nr Englewood
|
7cfs |
North Canadian River At Woodward
|
68cfs |
Cimarron River Near Forgan
|
19cfs |
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.
Hieronymous