North Aeration Stabilization Basin Lady Island Reservoir Report
Last Updated: December 14, 2025
North Aeration Stabilization Basin Lady Island in Washington is a privately owned water resource facility that plays a crucial role in water quality management and climate resilience.
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Summary
Constructed in 1977, this Earth-type dam stands at a hydraulic height of 20 feet, with a storage capacity of 1040 acre-feet and a normal storage level of 767 acre-feet. The dam's primary purpose is categorized as "Other," indicating its significance in maintaining environmental balance and safeguarding water resources in the region.
Managed by the Washington Department of Ecology, the North Aeration Stabilization Basin Lady Island boasts a satisfactory condition assessment and a significant hazard potential, highlighting the importance of regular inspections and maintenance activities. With a last inspection date in May 2017 and an inspection frequency of 5 years, this facility is equipped to handle emergencies effectively. Despite its relatively small drainage area of 0 acres, the dam serves a critical role in water management and climate adaptation efforts in Clark County, Washington.
As a part of Congressional District 03, this water resource structure exemplifies the collaborative efforts between private ownership and state regulatory agencies in ensuring efficient water resource management. With a focus on sustainability and environmental protection, the North Aeration Stabilization Basin Lady Island stands as a testament to the vital role of infrastructure in addressing the challenges posed by climate change and water scarcity.
Year Completed |
1977 |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
1040 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
20 |
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.
North Aeration Stabilization Basin Lady Island
Heritage Park