Hartman Dam Reservoir Report

Last Updated: December 5, 2025

Hartman Dam, also known as White Pond, is a private earth dam located in West Clarksfield, Ohio.


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Summary

Built in 1972 by the USDA NRCS, the dam serves primarily for recreational purposes and is regulated by the Department of Natural Resources in Ohio. With a height of 19.1 feet and a length of 120 feet, the dam has a normal storage capacity of 41.4 acre-feet and a maximum discharge of 394 cubic feet per second.

Situated on a tributary to the Vermilion River, Hartman Dam covers a surface area of 10.8 acres with a drainage area of 0.13 square miles. Despite being classified as having a low hazard potential, the dam's condition is assessed as fair. The last inspection in October 2016 indicated that the dam meets regulatory standards, with an inspection frequency of every five years. With a moderate risk assessment score of 3, there are currently no specific risk management measures in place for the dam.

Overall, Hartman Dam serves as a significant recreational resource in Huron County, Ohio, providing opportunities for water-based activities and wildlife habitat. As a privately owned structure, it contributes to the local landscape while being subject to state regulation and inspection to ensure its continued safety and functionality for the community.

Year Completed

1972

Dam Length

120

Dam Height

19.1

River Or Stream

TRIBUTARY TO VERMILION RIVER

Primary Dam Type

Earth

Surface Area

10.8

Drainage Area

0.13

Nid Storage

136

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

19
       
Seasonal Comparison

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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.