Union-Lancster Wat Sup Dm Reservoir Report
Last Updated: December 15, 2025
Union-Lancaster Wat Sup Dm, located in Lancaster, South Carolina, is a crucial water supply dam along the Catawba River.
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Summary
Completed in 1992, this Earth-type dam stands at a height of 65 feet and has a length of 830 feet, providing a storage capacity of 389 acre-feet. Despite its low hazard potential and fair condition assessment, this dam is regulated and inspected by the South Carolina Department of Health and Environmental Control to ensure its safety and functionality for water supply purposes.
Owned by the local government, Union-Lancaster Wat Sup Dm plays a vital role in providing water to the surrounding communities. It is designed with a buttress core type and is equipped with outlet gates for water release. The dam's emergency action plan, last revised in 2011, ensures preparedness for potential risks and emergencies, although the risk assessment and management measures are currently unspecified. With its close monitoring and regulatory oversight, Union-Lancaster Wat Sup Dm stands as a reliable infrastructure for water resource management in the region.
As water resource and climate enthusiasts, it is important to recognize the significance of Union-Lancaster Wat Sup Dm in sustaining water supply and ensuring community resilience. By understanding its design, operation, and regulatory framework, we can appreciate the efforts made to manage and maintain this essential infrastructure. With its capacity to store and provide water, this dam serves as a key component in the water supply system, contributing to the sustainable management of water resources in Lancaster, South Carolina, and beyond.
Year Completed |
1992 |
Dam Length |
830 |
Dam Height |
65 |
River Or Stream |
TR-CATAWBA RIVER |
Primary Dam Type |
Earth |
Surface Area |
16 |
Nid Storage |
389 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
65 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Andrew Jackson State Park
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Cane Creek Park
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Sign Language
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Union-Lancster Wat Sup Dm
Catawba Nation Greenway Trail York County