Coulbourn Mill Dam (South Division Street) Reservoir Report
Last Updated: December 5, 2025
Located in Shad Point, Maryland, the Coulbourn Mill Dam (South Division Street) is a historic structure also known as Fooks Pond or Colburn Pond.
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Summary
Built in 1947 for recreational purposes, this earth dam stands at 12 feet high and stretches 342 feet in length, creating a storage capacity of 70 acre-feet. The dam is situated on Tonytank Creek and is state-regulated by the Maryland Dam Safety agency.
Despite its age, the Coulbourn Mill Dam has undergone modifications in 2006 to enhance its hydraulic and structural integrity. However, its current condition assessment is deemed poor, with a high hazard potential and moderate risk level. The dam's emergency action plan was last revised in April 2022, and regular inspections are conducted to ensure public safety. While the dam serves as a recreational spot, its maintenance and risk management measures are crucial in safeguarding the surrounding area from potential inundation events.
Years Modified |
2006 - Hydraulic, 2006 - Structural |
Year Completed |
1947 |
Dam Length |
342 |
Dam Height |
12 |
River Or Stream |
Tonytank Creek |
Primary Dam Type |
Earth |
Surface Area |
13 |
Drainage Area |
5.5 |
Nid Storage |
70 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
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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.
Coulbourn Mill Dam (South Division Street)