Canonsburg No 2 Reservoir Report
Nearby: Canonsburg No 1 Glencannon Pond
Last Updated: December 13, 2025
Canonsburg No 2, located in Peters Township, Pennsylvania, is a recreational earth dam constructed in 1932 along Johnsons Run.
°F
°F
mph
Wind
%
Humidity
Summary
With a height of 36 feet and a length of 630 feet, this dam has a storage capacity of 825 acre-feet and serves as a popular spot for outdoor activities in the region. Despite its historical significance and recreational value, the dam is currently classified as having a high hazard potential and poor condition assessment, raising concerns about its long-term safety and maintenance.
Managed by the Pennsylvania Department of Environmental Protection, Canonsburg No 2 is subject to state regulation, permitting, inspection, and enforcement to ensure compliance with safety standards and environmental regulations. The dam's last inspection in September 2020 highlighted the need for improved maintenance and emergency preparedness measures to mitigate risks associated with its deteriorating condition. As a vital component of the local water resource infrastructure, efforts to address the dam's safety concerns and enhance its resilience to climate impacts are crucial for protecting both the surrounding community and the natural environment.
As water resource and climate enthusiasts, it is essential to advocate for proactive measures to address the challenges facing Canonsburg No 2 and other critical infrastructure. By promoting sustainable practices, investing in infrastructure upgrades, and enhancing emergency response capabilities, stakeholders can work towards ensuring the long-term viability of water resources and the resilience of dams like Canonsburg No 2 in the face of evolving climate conditions. Only through collaborative efforts and informed decision-making can we safeguard our water resources for future generations and mitigate the potential risks associated with aging infrastructure.
Year Completed |
1932 |
Dam Length |
630 |
Dam Height |
36 |
River Or Stream |
JOHNSONS RUN |
Primary Dam Type |
Earth |
Surface Area |
44 |
Drainage Area |
1.54 |
Nid Storage |
825 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Chartiers Creek At Carnegie
|
105cfs |
Monongahela River At Elizabeth
|
21100cfs |
Youghiogheny River At Sutersville
|
1030cfs |
Little Pine Creek Near Etna
|
2cfs |
Ohio River At Sewickley
|
10300cfs |
South Fork Tenmile Creek At Jefferson
|
50cfs |
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.
Canonsburg No 2
Canonsburg Lake