Conneaut Marsh Reservoir Report

Last Updated: December 16, 2025

Conneaut Marsh, located in Crawford County, Pennsylvania, is a state-regulated water resource managed by the Pennsylvania Department of Environmental Protection.


°F

°F

mph

Wind

%

Humidity

Summary

This recreational dam, completed in 1955, stands at a height of 8 feet and has a storage capacity of 2700 acre-feet. The dam spans 60 feet across Conneaut Creek, providing a surface area of 500 acres for outdoor enthusiasts to enjoy.

Despite its low hazard potential, Conneaut Marsh has not been rated for its condition assessment as of the last inspection in May 2016. The dam serves primarily for recreational purposes and is constructed of concrete with a buttress core design. Its location in Vernon Township offers a peaceful retreat for visitors seeking to explore the natural beauty of the region and engage in outdoor activities such as fishing, boating, and wildlife observation. As a vital water resource in the area, Conneaut Marsh plays a significant role in supporting the local ecosystem and providing a sanctuary for diverse flora and fauna.

With its picturesque setting and strategic location along Conneaut Creek, Conneaut Marsh is a noteworthy destination for water resource and climate enthusiasts. As a state-regulated dam, it ensures the safety and maintenance of the surrounding environment while offering recreational opportunities for the community. Whether for leisurely outings or environmental exploration, this serene marshland serves as a valuable asset for both residents and visitors to appreciate and protect for future generations.

Year Completed

1955

Dam Length

60

Dam Height

8

River Or Stream

CONNEAUT CREEK

Primary Dam Type

Concrete

Surface Area

500

Drainage Area

68

Nid Storage

2700

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.