Diamond Lake Reservoir Report
Nearby: Waynesburg Lakes Wisecarver
Last Updated: December 12, 2025
Diamond Lake, located in Greene County, Pennsylvania, is a privately owned recreational lake regulated by the Pennsylvania Department of Environmental Protection.
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Summary
The dam at Diamond Lake is an earth dam with a height of 35 feet, creating a storage capacity of 47 acre-feet. The primary purpose of the dam is for recreation, with a normal storage capacity of 6 acre-feet and a surface area of 4 acres.
The dam at Diamond Lake has a low hazard potential and is in fair condition as of the last inspection in July 2017. The inspection frequency is every 5 years, indicating regular maintenance and monitoring of the dam's safety. While the dam has not been modified in recent years, it meets state regulatory requirements and is equipped with emergency action plans to ensure the safety of the surrounding community in case of a dam failure. Diamond Lake provides a valuable recreational resource while also being managed responsibly to mitigate any potential risks associated with dam ownership.
Dam Height |
35 |
River Or Stream |
TR RUFF CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.15 |
Nid Storage |
47 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Fork Tenmile Creek At Jefferson
|
69cfs |
Monongahela River Near Masontown
|
4890cfs |
Dunkard Creek At Shannopin
|
201cfs |
Redstone Creek At Waltersburg
|
42cfs |
Monongahela River At Elizabeth
|
21100cfs |
Wheeling Creek At Elm Grove
|
117cfs |
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.
Diamond Lake