Ash Basin No 1 Reservoir Report
Nearby: Ash Basin No 2 Ash Basin No 3
Last Updated: December 15, 2025
Ash Basin No 1 in Snyder, Pennsylvania, is a privately owned earth dam completed in 1949 with a primary purpose listed as "Other." The dam stands at a height of 22 feet and has a length of 6405 feet, providing a storage capacity of 95 acre-feet.
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Summary
Located in Monroe Township, the dam is regulated by the Pennsylvania Department of Environmental Protection and is inspected regularly to ensure its fair condition and high hazard potential are managed effectively.
Situated in the watershed of the Susquehanna River, Ash Basin No 1 serves as a crucial water resource in the region, with a normal storage capacity of 16 acre-feet and a drainage area of 0.1 square miles. Despite its fair condition assessment, the dam's high hazard potential necessitates strict regulatory oversight and emergency preparedness. With a history dating back to the mid-20th century, Ash Basin No 1 showcases the importance of maintaining aging infrastructure to safeguard against potential risks and ensure the sustainable management of water resources in the face of changing climate patterns.
As an essential component of the water management infrastructure in Pennsylvania, Ash Basin No 1 highlights the intersection of environmental regulation, climate resilience, and public safety. With its location in a region represented by Tom Marino (R) and overseen by the Pennsylvania Department of Environmental Protection, the dam plays a critical role in mitigating flood risks, providing water storage, and supporting the ecological health of the Susquehanna River watershed. As climate change continues to impact water resources, the maintenance and oversight of structures like Ash Basin No 1 are vital for ensuring the long-term sustainability of water systems and the communities that rely on them.
Year Completed |
1949 |
Dam Length |
6405 |
Dam Height |
22 |
River Or Stream |
WTRSHD SUSQUEHANNA RIVER |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.1 |
Nid Storage |
95 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
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.
Ash Basin No 1
Shady Nook