Marysville Upground Reservoir Reservoir Report
Last Updated: December 28, 2025
Located in Union, Ohio, the Marysville Upground Reservoir is a vital water source designed by BBCM Engineering, Inc.
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Summary
The reservoir, completed in 2009, stands at a height of 48.3 meters and has a storage capacity of 4634 acre-feet, serving as a reliable water supply for the region. With a surface area of 114 acres and a drainage area of 0.18 square miles, this offstream reservoir plays a crucial role in meeting the water needs of the community.
Regulated by the Department of Natural Resources in Ohio, the Marysville Upground Reservoir is inspected regularly to ensure its structural integrity and safety. Classified as having a high hazard potential, the dam is deemed to be in satisfactory condition as of the last assessment in November 2020. Despite its hazard potential, the reservoir continues to provide essential water supply services, contributing to the overall water management efforts in the area.
As a key infrastructure for water supply in Union, Ohio, the Marysville Upground Reservoir underscores the importance of sustainable water resource management in the face of climate change. With its significant storage capacity and strategic location, this reservoir stands as a testament to the community's commitment to ensuring a reliable and safe water supply for current and future generations.
Year Completed |
2009 |
Dam Length |
11155 |
Dam Height |
48.3 |
River Or Stream |
OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
114 |
Drainage Area |
0.18 |
Nid Storage |
4634 |
Hazard Potential |
High |
Nid Height |
48 |
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.
Marysville Upground Reservoir