Collington Facility 14 Swm Dam Reservoir Report

Last Updated: December 5, 2025

Collington Facility 14 Swm Dam, located in Upper Marlboro, Maryland, is a local government-owned structure designed for flood risk reduction along the Western Br-Patuxent River.


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Summary

Built in 1992, this earth dam stands at a height of 16 feet and spans a length of 393 feet, with a storage capacity of 73 acre-feet. Despite its relatively low hazard potential and satisfactory condition assessment, the dam is subject to regular state inspections and enforcement measures by the Maryland Dam Safety regulatory agency.

This dam features an uncontrolled spillway with a width of 5 feet and is surrounded by a surface area of 2.27 acres, serving a drainage area of 0.43 square miles. The primary purpose of the Collington Facility 14 Swm Dam is to mitigate flood risks in the area, with a moderate risk assessment rating. While it has not undergone any significant modifications in recent years, the dam is equipped to handle emergency situations, although details about the emergency action plan are not readily available in the provided data.

With its critical role in flood risk reduction and its strategic location within the Prince George's County watershed, the Collington Facility 14 Swm Dam serves as a vital piece of infrastructure in the region's water resource management efforts. Its presence underscores the importance of maintaining and monitoring dams to ensure the safety and security of communities in the face of changing climate patterns and water resource challenges.

Year Completed

1992

Dam Length

393

Dam Height

16

River Or Stream

Western Br-Patuxent River-TR

Primary Dam Type

Earth

Surface Area

2.27

Drainage Area

0.43

Nid Storage

73

Hazard Potential

Low

Foundations

Soil

Nid Height

16
       
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.