Clarifiers Reservoir Report
Last Updated: December 5, 2025
Clarifiers in Harrisburg, Illinois, are privately owned structures regulated by the state agency IDNR.
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Summary
These Earth-type dams, standing at a height of 36 feet, serve the primary purpose of water supply, with a storage capacity of 130 acre-feet. The Mine Safety and Health Administration oversees inspections and enforcement at the site, ensuring compliance with safety regulations.
With a low hazard potential and no available condition assessment, the Clarifiers are considered to be in satisfactory condition. The last inspection date was in January 2004, indicating a need for updated assessments to ensure the continued safety and functionality of the structure. While the risk assessment and management measures are not specified, the presence of state permitting, inspection, and enforcement suggests a commitment to maintaining the integrity of the dam.
Located in Saline County, Illinois, the Clarifiers play a vital role in water resource management in the region. As enthusiasts of water resources and climate, it is important to monitor and advocate for the upkeep of such infrastructure to ensure the sustainable utilization of this essential natural resource. With the involvement of regulatory agencies and state oversight, these clarifiers serve as a key component in the water supply network of the area, highlighting the intersection of engineering, environmental stewardship, and regulatory compliance.
Dam Height |
36 |
Primary Dam Type |
Earth |
Nid Storage |
130 |
Hazard Potential |
Low |
Nid Height |
36 |
Seasonal Comparison
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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.
Clarifiers