Shipleys Crossing North Dam 1 (Galiot Dr) Reservoir Report

Last Updated: December 5, 2025

Shipleys Crossing North Dam 1 (Galiot Dr) is a privately owned earth dam located in Old Mill, Maryland, designed by David Hursh Chisholm.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 2008, this dam serves as a crucial flood risk reduction structure along Marley Creek-TR. With a height of 9 feet and a length of 290 feet, it has a storage capacity of 2 acre-feet and a drainage area of 0.08 square miles.

Despite being privately owned, Shipleys Crossing North Dam 1 is regulated and inspected by the Maryland Dam Safety agency. Its hazard potential is classified as significant, but its condition assessment as of July 2018 was deemed satisfactory. With a moderate risk level and a regular inspection frequency of 3 years, this dam plays a crucial role in mitigating flood risks in the area.

In the event of an emergency, the dam's Emergency Action Plan (EAP) preparation status and adherence to guidelines remain unspecified. However, the dam's risk management measures and inundation maps readiness are also not specified. With its location in Anne Arundel County, Maryland, this dam stands as a testament to the importance of proactive water resource management and climate resilience efforts in the face of increasing environmental challenges.

Year Completed

2008

Dam Length

290

Dam Height

9

River Or Stream

Marley Creek-TR

Primary Dam Type

Earth

Surface Area

0.5

Drainage Area

0.08

Nid Storage

2

Hazard Potential

Significant

Foundations

Soil

Nid Height

9
       
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.