Rolling Hills Swm Pond Reservoir Report

Last Updated: December 5, 2025

Rolling Hills Stormwater Management Pond, also known as Mcdep Asset No.


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Summary

10860, is a privately owned flood risk reduction structure located in Germantown, Montgomery County, Maryland. Designed by JMT-Johnson, Mirmiran, and Thompson, this earth dam stands at a height of 15 feet and has a length of 200 feet. Completed in 1982, the pond has a storage capacity of 10.5 acre-feet and serves the primary purpose of flood risk reduction.

With a high hazard potential, Rolling Hills SWM Pond is regularly inspected by the Maryland Dam Safety agency to ensure its structural integrity. The latest inspection conducted on March 11, 2022, found the dam to be in satisfactory condition. Despite its moderate risk assessment rating, the pond does not currently have an Emergency Action Plan in place, indicating a need for further risk management measures.

Located along Gunners Branch-TR, this stormwater management pond plays a crucial role in mitigating flooding in the area. As water resource and climate enthusiasts, it is important to monitor and support the maintenance and upkeep of such structures to ensure the safety and well-being of the surrounding community and environment.

Year Completed

1982

Dam Length

200

Dam Height

15

River Or Stream

Gunners Branch-TR

Primary Dam Type

Earth

Drainage Area

0.05

Nid Storage

10.5

Outlet Gates

Needle - 0

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

15
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.