Prompton Reservoir Reservoir Report

Last Updated: December 6, 2025

Prompton Reservoir is a man-made lake located in Wayne County, Pennsylvania.


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Summary

It was built in the 1960s to provide a reliable water supply to the surrounding communities. The reservoir is fed by a network of streams and rivers, which are monitored by the hydrology department to ensure adequate flow. It also gets water from the melting winter snow that accumulates in the surrounding hills. The reservoir has a surface area of 289 acres and a maximum depth of 70 feet. It is used for recreational activities like fishing, boating, and hiking. The area around the reservoir is also used for agriculture, with many farmers relying on its water supply for their crops. Overall, the Prompton Reservoir is a vital source of water and an important recreational resource in Northeastern Pennsylvania.

Reservoir Details

Elevation Of Reservoir Water Surface Above Datum, Ft 24hr Change -0.01%
Percent of Normal 100%
Minimum 1,121.53 ft
2020-07-07
Maximum 1,133.94 ft
2022-04-08
Average 1,126 ft
Hydraulic_Height 127
Drainage_Area 60
Year_Completed 1961
Nid_Storage 72800
Structural_Height 140
Primary_Dam_Type Earth
Foundations Rock, Soil
Surface_Area 290
Hazard_Potential High
Outlet_Gates Uncontrolled - 0
River_Or_Stream LACKAWAXEN RIVER
Dam_Length 1200
Nid_Height 140
       
Seasonal Comparison
Elevation Of Reservoir Water Surface Above Datum, Ft Levels

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.