Hap Cremean Lagoon #1 Reservoir Report

Last Updated: December 5, 2025

Hap Cremean Lagoon #1, located in Franklin, Ohio, is a significant earth dam completed in 2011 for the primary purpose of tailings storage.


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Summary

Managed by the local government and regulated by the Department of Natural Resources, this dam stands at a height of 14 feet, with a storage capacity of 232.9 acre-feet. The dam covers a surface area of 17 acres and serves the drainage area of Big Walnut Creek offstream.

Despite its significant hazard potential, Hap Cremean Lagoon #1 has been assessed to be in satisfactory condition as of December 2020. Regular inspections are conducted every 5 years to ensure its structural integrity and safety. The dam has a spillway width of 0 feet and does not have any outlet gates or associated structures. With a solid track record of compliance with state regulations, this lagoon plays a crucial role in water resource management in the region.

Water resource and climate enthusiasts will find Hap Cremean Lagoon #1 to be a fascinating case study in dam engineering and management. Its location, design, and purpose offer valuable insights into the intersection of human infrastructure with natural water systems. As efforts to address climate change and ensure water security continue to be a global priority, understanding the role of dams like Hap Cremean Lagoon #1 is essential for sustainable water resource management.

Year Completed

2011

Dam Length

1000

Dam Height

14

River Or Stream

BIG WALNUT CREEK - OFFSTREAM

Primary Dam Type

Earth

Surface Area

17

Drainage Area

0.03

Nid Storage

232.9

Hazard Potential

Significant

Nid Height

14
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.