No 1 Reservoir Report

Last Updated: December 9, 2025

No 1 is a privately owned dam located in Coolbaugh Township, Monroe County, Pennsylvania, along the Tobyhanna Creek.


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Summary

Built for purposes other than flood control or water supply, this Earth-type dam stands at a height of 8 feet and has a storage capacity of 334 acre-feet. Despite being regulated by the Pennsylvania Department of Environmental Protection and meeting state permitting, inspection, and enforcement requirements, No 1 is classified as having a low hazard potential and a poor condition assessment.

The dam, managed by a private owner, has not undergone any significant modifications since its construction, with the last inspection taking place in July 2017. Although it does not pose a high risk, its poor condition raises concerns about its long-term safety and functionality. Given its location in a populated area and potential impact on the surrounding environment, continued monitoring and potential rehabilitation efforts may be necessary to ensure the reliability of No 1 as a water resource infrastructure in the face of changing climate conditions.

Dam Height

8

River Or Stream

TOBYHANNA CREEK

Primary Dam Type

Earth

Drainage Area

13.9

Nid Storage

334

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

8
       
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.