Mackiewicz Reservoir Report
Nearby: Maggio Estate No 2 Pond
Last Updated: December 8, 2025
Mackiewicz is a privately owned Earth dam located in Liberty, Pennsylvania, with a primary purpose of recreation.
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Summary
Built in 1969 by the USDA NRCS, this dam stands at a height of 15 feet and has a length of 750 feet. It has a storage capacity of 54 acre-feet and is situated on the Blockhouse River, within the Buffalo District. With a low hazard potential and moderate risk assessment, Mackiewicz is categorized as having a risk level of 3.
Although primarily used for fish and wildlife pond purposes, Mackiewicz also serves as a recreational area for visitors. The dam features an uncontrolled spillway and outlet gates, with a spillway width of 31 feet. While the dam is currently in good condition and meets safety guidelines, there is limited data available on its inspection history and emergency preparedness measures. As a point of interest for water resource and climate enthusiasts, Mackiewicz offers a unique location for outdoor activities and wildlife observation in the Tioga County area of Pennsylvania.
Year Completed |
1969 |
Dam Length |
750 |
Dam Height |
14 |
River Or Stream |
Blockhouse |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Drainage Area |
0.22 |
Nid Storage |
54 |
Structural Height |
15 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
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.
Mackiewicz