Aerated Stabilization Basin Reservoir Report

Last Updated: December 6, 2025

The Aerated Stabilization Basin in Penrose, North Carolina, is a private water resource facility designed to treat and manage wastewater effectively.


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Summary

Completed in 1977, this Earth dam structure stands at a hydraulic height of 20 feet and a structural height of 23.5 feet, with a storage capacity of 1,200 acre-feet. The basin covers a surface area of 60 acres and is regulated by the NCDEQ's Dam Safety Program, ensuring compliance with state permitting, inspection, and enforcement requirements.

Located in Transylvania County along the Stream Waste Lagoon-Os, the Aerated Stabilization Basin plays a crucial role in water quality management and environmental protection. With a high hazard potential, the facility undergoes regular inspections every two years to assess its satisfactory condition and ensure emergency preparedness. Its proximity to the Nashville District underscores the importance of maintaining proper risk management measures and up-to-date emergency action plans to mitigate potential hazards and protect downstream communities.

As a key component of North Carolina's water infrastructure, the Aerated Stabilization Basin serves as a vital resource for water treatment and conservation efforts. Its operational excellence and adherence to regulatory standards highlight the commitment to safeguarding water resources and supporting sustainable development in the region. With ongoing oversight and maintenance, this facility continues to play a crucial role in promoting water quality, environmental stewardship, and public safety in the state.

Year Completed

1977

Dam Length

5400

River Or Stream

Stream Waste Lagoon-Os

Primary Dam Type

Earth

Surface Area

60

Hydraulic Height

20

Nid Storage

1200

Structural Height

23.5

Hazard Potential

High

Nid Height

24
       
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.