Little Black River Structure B Reservoir Report
Last Updated: December 5, 2025
Little Black River Structure B, also known as the Golf Course Structure, is a significant earth dam located in Cheboygan, Michigan.
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Summary
Owned by the local government, this dam was designed by the USDA NRCS and serves the primary purpose of flood risk reduction along the Little Black River. Completed in 1962, the dam stands at a height of 31.1 feet and has a hydraulic height of 22 feet.
With a hazard potential rated as high and a poor condition assessment from its last inspection in 2017, Little Black River Structure B is in need of attention and maintenance to ensure its effectiveness in flood risk reduction. The dam has a drainage area of 14.8 square miles and a maximum discharge capacity of 970 cubic feet per second. The spillway, which is uncontrolled, has a width of 404 feet, and there are no outlet gates associated with the dam.
Despite its limitations, Little Black River Structure B continues to play a crucial role in protecting the surrounding area from flooding. With a risk assessment rating of moderate and a history dating back to the 1960s, this dam serves as a reminder of the importance of maintaining and monitoring our water infrastructure in the face of changing climate conditions.
Year Completed |
1962 |
Dam Length |
940 |
Dam Height |
31.1 |
River Or Stream |
Litle Black River |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Drainage Area |
14.8 |
Nid Storage |
958 |
Structural Height |
31.1 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
31 |
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.
Little Black River Structure B
East Elm Street Cheboygan