Sunbury Upground Reservoir No. 1 Reservoir Report
Last Updated: December 20, 2025
Sunbury Upground Reservoir No.
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Summary
1, located in Sunbury, Ohio, is a local government-owned water resource designed by Burgess and Niple, Ltd. The reservoir, completed in 1955, serves primarily for recreational purposes and is regulated by the Department of Natural Resources in Ohio. With a dam height of 16.5 feet and a storage capacity of 91 acre-feet, it offers a surface area of 7.2 acres for recreational activities such as boating and fishing along the Big Walnut Creek.
The reservoir's hazard potential is classified as high, although its condition assessment was rated as fair during the last inspection in December 2020. The Emergency Action Plan (EAP) status and risk assessment measures are still pending updates, suggesting ongoing efforts to ensure the safety and maintenance of the reservoir. With its proximity to the Louisville District of the US Army Corps of Engineers, Sunbury Upground Reservoir No. 1 remains a significant asset for water resource and climate enthusiasts seeking sustainable outdoor recreational opportunities in Delaware County, Ohio.
Year Completed |
1955 |
Dam Length |
2251 |
Dam Height |
16.5 |
River Or Stream |
BIG WALNUT CREEK - OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
7.2 |
Drainage Area |
0.03 |
Nid Storage |
91 |
Hazard Potential |
High |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Sunbury Upground Reservoir No. 1
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