Ray T Mantz Reservoir Report

Last Updated: December 7, 2025

Ray T Mantz is a privately owned dam located in Luzerne, Pennsylvania, along the Wapwallopen Creek.


°F

°F

mph

Wind

%

Humidity

Summary

Constructed in 1962, this earth dam stands at a height of 13 feet and has a length of 425 feet, serving primarily for recreational purposes. With a storage capacity of 199 acre-feet and a normal storage of 129 acre-feet, the dam covers a surface area of 30 acres and drains an area of 2.3 square miles.

Managed by the Pennsylvania Department of Environmental Protection, Ray T Mantz has a low hazard potential and is currently assessed to be in fair condition. The dam undergoes inspections every five years, with the most recent inspection conducted in December 2020. While no emergency action plan (EAP) has been prepared or updated, the dam meets regulatory guidelines set by the state.

Enthusiasts interested in water resources and climate will find Ray T Mantz to be an intriguing structure due to its recreational purpose, location in the picturesque Dennison Township, and regulation by the Pennsylvania Department of Environmental Protection. With its historical significance dating back to the early 1960s, this dam provides a valuable insight into the management and maintenance of water infrastructure in the region.

Year Completed

1962

Dam Length

425

Dam Height

13

River Or Stream

WAPWALLOPEN CREEK

Primary Dam Type

Earth

Surface Area

30

Drainage Area

2.3

Nid Storage

199

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

13
       
Seasonal Comparison

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.