Summary
This earth-type dam stands at a height of 7 feet and has a hydraulic height of 4.7 feet, with a total length of 500 feet. The dam's primary purpose is for recreation, offering a surface area of 2200 acres and a normal storage capacity of 1760 acre-feet.
Despite its low hazard potential and satisfactory condition assessment as of June 2015, Potagannissing Dam is subject to moderate risk, with a moderate risk assessment rating. The dam's spillway type is uncontrolled, with a width of 50 feet, and it does not feature locks or associated structures. The dam is not under state jurisdiction or regulation, with no state permitting, inspection, or enforcement in place. The last inspection of the dam took place in June 2015, with an inspection frequency of every 5 years.
Overall, Potagannissing Dam presents an intriguing case study for water resource and climate enthusiasts, showcasing the complexities of managing recreational dams in the face of potential risks and regulatory challenges. Its location in Chippewa County, Michigan, within the Detroit District, highlights the importance of maintaining and monitoring such structures to ensure their continued safety and functionality for both recreational and environmental purposes. As a focal point for outdoor activities and water-based recreation, Potagannissing Dam serves as a vital part of the local landscape, requiring ongoing attention and assessment to mitigate any potential hazards and ensure its long-term sustainability.
Year Completed |
1948 |
Dam Length |
500 |
Dam Height |
7 |
River Or Stream |
Potagannissing River |
Primary Dam Type |
Earth |
Surface Area |
2200 |
Hydraulic Height |
4.7 |
Drainage Area |
32.8 |
Nid Storage |
6160 |
Structural Height |
7 |
Hazard Potential |
Low |
Nid Height |
7 |
Seasonal Comparison
Weather Forecast
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.
Potagannissing Dam