Frederick Research Park Lot 4 Swm Pond Reservoir Report

Last Updated: December 5, 2025

The Frederick Research Park Lot 4 Stormwater Management (SWM) Pond is a key infrastructure designed by Macris, Hendricks, and Glascock to address flood risk reduction in the Wormans Mill Industrial Park area of Frederick, Maryland.


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Summary

Completed in 1990, this earth dam structure stands at a height of 20 feet and spans 400 feet in length, with a storage capacity of 70 acre-feet and a drainage area of 0.6 square miles. The pond serves as a crucial flood control measure along the Mononocacy River-TR, with a spillway width of 60 feet for uncontrolled water discharge.

Despite its important role in mitigating flood risks, the SWM Pond at Frederick Research Park Lot 4 is currently in poor condition, with a significant hazard potential due to its age and structural integrity. The last inspection in August 2021 revealed a need for improvement, and the structure has been modified in 2008 for seismic considerations. With a risk assessment rating of moderate (3), there is a pressing need for ongoing maintenance and risk management measures to ensure the safety and effectiveness of this essential water resource infrastructure for the surrounding community and environment.

Years Modified

2008 - Seismic

Year Completed

1990

Dam Length

400

Dam Height

20

River Or Stream

Mononocacy River-TR

Primary Dam Type

Earth

Surface Area

1

Drainage Area

0.6

Nid Storage

70

Hazard Potential

Significant

Foundations

Rock, Soil

Nid Height

20
       
Seasonal Comparison

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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.