Porter Lake Dam Reservoir Report
Last Updated: December 6, 2025
Porter Lake Dam, located in Graff, Missouri, was completed in 1960 and serves as a recreational site for water resource and climate enthusiasts.
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Summary
This private dam, with a height of 25 feet, offers a serene environment along TR-Beaver Creek, providing a surface area of 3 acres and a storage capacity of 40 acre-feet. While the dam's primary purpose is recreation, it also contributes to flood control and water storage within its 280-acre drainage area.
Managed by private owners, Porter Lake Dam has a low hazard potential and has not been rated for its condition assessment. Despite not being regulated or inspected by state agencies, the dam remains a popular spot for fishing, boating, and wildlife observation. While there are no associated structures or emergency action plans in place, Porter Lake Dam continues to stand as a symbol of human-nature interaction, offering a tranquil retreat for those seeking to connect with the natural world in Wright County, Missouri.
Year Completed |
1960 |
Dam Height |
25 |
River Or Stream |
TR-BEAVER CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
280 |
Nid Storage |
40 |
Structural Height |
25 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Porter Lake Dam