Naji Lake Dam Reservoir Report
Last Updated: December 24, 2025
Naji Lake Dam, located in Mechanicsville, Ohio, is a privately owned earth dam completed in 1963 for the primary purpose of recreation.
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Summary
The dam stands at a height of 18.7 feet and has a storage capacity of 85.2 acre-feet, with a normal storage level of 20.7 acre-feet. The dam holds back Mill Creek, contributing to a drainage area of 2.36 square miles and covering a surface area of 6.2 acres.
Despite its recreational importance, Naji Lake Dam poses a high hazard potential due to its poor condition assessment as of the last inspection in March 2016. The dam's emergency action plan (EAP) status is unclear, and there are no inundation maps prepared to outline potential risks in case of a failure. With a history of repairs in 1977 by Robert E. Phillips from Chardon, Ohio, the dam remains under the regulatory oversight of the Ohio Department of Natural Resources, indicating state permitting, inspection, and enforcement protocols are in place.
Water resource and climate enthusiasts interested in Naji Lake Dam will find it to be a significant structure in Ashtabula County, Ohio, serving both recreational and flood control purposes. The dam's location along Mill Creek within the Pittsburgh District adds to its regional importance. However, concerns over the dam's high hazard potential and poor condition assessment highlight the need for continued monitoring and maintenance to ensure the safety of surrounding communities and the preservation of this valuable water resource.
Year Completed |
1963 |
Dam Length |
385 |
Dam Height |
18.7 |
River Or Stream |
MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
6.2 |
Drainage Area |
2.36 |
Nid Storage |
85.2 |
Hazard Potential |
High |
Nid Height |
19 |
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.
Naji Lake Dam