Bowie Town Center Lake Reservoir Report

Last Updated: December 5, 2025

Bowie Town Center Lake, also known as Excalibur Dam, is a local government-owned water resource located in Prince George's County, Maryland.


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Summary

Completed in 1990, this earth dam stands at a height of 20 feet and spans a length of 600 feet, with a storage capacity of 100 acre-feet and a maximum storage of 196 acre-feet. The primary purpose of this dam is flood risk reduction, but it also serves as a recreational area for the community, covering a surface area of 7 acres.

Managed by the Maryland Dam Safety regulatory agency, Bowie Town Center Lake is inspected annually for safety and condition assessment, with the most recent inspection indicating a fair condition. The dam has a high hazard potential, prompting the implementation of risk management measures to ensure the safety of the surrounding area. Despite the potential risks, the moderate risk assessment indicates a manageable level of danger, with the dam meeting guidelines for emergency action plans and inundation maps prepared for potential scenarios.

Situated along Mill Branch, a tributary in Collington, Bowie Town Center Lake not only serves as a vital flood control structure but also provides a serene recreational space for water resource and climate enthusiasts to enjoy. With its strategic design and regulatory oversight, this dam plays a crucial role in protecting the community from flood risks while offering a picturesque setting for outdoor activities.

Years Modified

1990 - Seismic

Year Completed

1990

Dam Length

600

Dam Height

20

River Or Stream

Mill Branch

Primary Dam Type

Earth

Surface Area

7

Drainage Area

0.32

Nid Storage

100

Hazard Potential

High

Foundations

Soil

Nid Height

20
       
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.