Allen Street Detention Pond Dam Reservoir Report
Nearby: Warner Dam Anderson Dam
Last Updated: December 24, 2025
The Allen Street Detention Pond Dam, located in Jamestown, New York, serves as a crucial flood risk reduction infrastructure on the OS-CHADAKOIN RIVER.
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Summary
This earth dam stands at a height of 21 feet and has a length of 180 feet, providing a storage capacity of 7.6 acre-feet. With a spillway width of 20 feet and uncontrolled spillway type, the dam is designed to manage significant hazard potential and moderate risk, according to assessments.
Owned and regulated by the local government and the New York State Department of Environmental Conservation, the Allen Street Detention Pond Dam undergoes regular inspections to ensure its structural integrity. The dam's primary purpose is flood risk reduction, aligning with its critical role in protecting the surrounding Chautauqua County community. Despite not being rated for its condition, the dam's risk management measures and emergency preparedness protocols contribute to maintaining its functionality and safeguarding residents from potential flooding events. As climate change continues to impact water resources, structures like the Allen Street Detention Pond Dam play a vital role in mitigating risks and protecting communities from natural disasters.
Dam Length |
180 |
Dam Height |
21 |
River Or Stream |
OS-CHADAKOIN RIVER |
Primary Dam Type |
Earth |
Surface Area |
0.7 |
Drainage Area |
0.69 |
Nid Storage |
7.6 |
Hazard Potential |
Significant |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Chadakoin River At Falconer Ny
|
745cfs |
Conewango Creek At Russell
|
3550cfs |
Brokenstraw Creek At Youngsville
|
737cfs |
Allegheny River Bl Conewango Creek At Warren
|
9280cfs |
Allegheny River At Kinzua Dam
|
5820cfs |
Allegheny River At Salamanca Ny
|
3300cfs |
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.
Allen Street Detention Pond Dam