Piedmont Dam Reservoir Report

Last Updated: December 5, 2025

Piedmont Dam, also known as Piedmont Lake, is a vital structure in Harrison, Ohio, designed by US Army Corps of Engineers (CELRH) in 1937.


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Summary

Situated on the Stillwater Creek, this Federal-owned dam primarily serves the purpose of flood risk reduction, while also providing benefits for fish and wildlife, recreation, and water storage. With a hydraulic height of 45 feet and a structural height of 56 feet, the dam has a length of 1750 feet and a storage capacity of 67,000 acre-feet.

Managed by the US Army Corps of Engineers, Piedmont Dam has a high hazard potential and is subject to regular inspections and emergency action plans. The dam's risk management measures include continuous monitoring, prioritized maintenance activities, and collaboration with local emergency managers to ensure public safety in case of a dam-related emergency. Recognizing the role of dams in flood risk mitigation, the USACE takes proactive steps to address potential issues and ensure the structural integrity of the Piedmont Dam for the surrounding community.

With a focus on risk assessment and management, Piedmont Dam stands as a critical infrastructure for flood control and water resource management in the region. By implementing proactive measures and engaging with stakeholders, the US Army Corps of Engineers demonstrates its commitment to safeguarding the dam and addressing potential challenges arising from severe weather events or structural vulnerabilities.

Year Completed

1937

Dam Length

1750

River Or Stream

STILLWATER CREEK

Primary Dam Type

Earth

Surface Area

2312

Hydraulic Height

45

Drainage Area

86

Nid Storage

66700

Structural Height

56

Outlet Gates

Slide (sluice gate) - 4

Hazard Potential

High

Foundations

Soil

Nid Height

56
       
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.