Timber Lake Reservoir Report
Nearby: Lake Jo-Ann Trax Farms
Last Updated: December 26, 2025
Timber Lake, located in Peters Township, Pennsylvania, is a privately owned earth dam that serves the primary purpose of flood risk reduction along the TR Peters Creek.
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Summary
Completed in 1990, this dam stands at a height of 17 feet with a length of 575 feet, providing a storage capacity of 63 acre-feet. With a surface area of 3 acres and draining an area of 1.12 square miles, Timber Lake plays a crucial role in mitigating flood risks in the region.
Managed by the Pennsylvania Department of Environmental Protection, Timber Lake is subject to state regulations, inspections, and enforcement measures to ensure its safety and functionality. Despite being classified as having a significant hazard potential, the dam's condition assessment is listed as fair as of its last inspection in July 2017. The dam's Emergency Action Plan status, risk assessment, and management measures are currently unspecified, highlighting the importance of ongoing monitoring and maintenance efforts to safeguard the surrounding community and water resources.
As a vital infrastructure for flood control in Washington County, Pennsylvania, Timber Lake serves as a critical component in the region's water resource management and climate resilience strategies. With its strategic location and design features, this dam not only helps reduce flood risks but also underscores the importance of proactive dam safety practices and emergency preparedness efforts to ensure the continued protection of communities and the environment.
Year Completed |
1990 |
Dam Length |
575 |
Dam Height |
17 |
River Or Stream |
TR PETERS CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
1.12 |
Nid Storage |
63 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Monongahela River At Elizabeth
|
21100cfs |
Chartiers Creek At Carnegie
|
117cfs |
Youghiogheny River At Sutersville
|
2190cfs |
Little Pine Creek Near Etna
|
1cfs |
Ohio River At Sewickley
|
34500cfs |
South Fork Tenmile Creek At Jefferson
|
53cfs |
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.
Timber Lake
Canonsburg Lake