Junction Industrial Park Reservoir Report

Last Updated: December 5, 2025

Junction Industrial Park in Annapolis Junction, Maryland, is home to a privately owned Earth dam constructed in 1984 by Whitney, Baily, Cox, Magnani Consulting Engineers.


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Summary

This dam on the Little Patuxent-Offstream river stands at 18 feet tall and stretches 603 feet in length, providing a storage capacity of 30.7 acre-feet. The dam is regulated by the Maryland Dam Safety agency, ensuring proper inspection, permitting, and enforcement measures are in place.

With a high hazard potential and fair condition assessment, the dam at Junction Industrial Park is subject to regular inspections every three years to ensure its structural integrity. The last inspection took place in March 2019, with the condition assessment updated in April 2021. Despite its age, the dam continues to serve its primary purpose effectively, contributing to water resource management in the Howard County area.

Water resource and climate enthusiasts interested in the Junction Industrial Park dam can appreciate the engineering behind this vital structure, as well as the environmental considerations taken into account in its design. As an essential component of Maryland's infrastructure, this Earth dam plays a crucial role in flood control, water storage, and overall environmental protection in the region.

Year Completed

1984

Dam Length

603

Dam Height

18

River Or Stream

Little Patuxent-Offstream

Primary Dam Type

Earth

Drainage Area

73.57

Nid Storage

30.7

Outlet Gates

Needle - 0

Hazard Potential

High

Foundations

Soil

Nid Height

18
       
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.