Summit Hall Park Dam Reservoir Report

Last Updated: December 25, 2025

Summit Hall Park Dam, located in Gaithersburg, Maryland, is a vital water supply structure designed by Macris and Hendricks.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1993, this multi-arch dam stands at a height of 14 feet with a length of 700 feet, providing a storage capacity of 16 acre-feet. Its primary purpose is water supply, serving the local community and ensuring water availability for various uses.

Managed by the Maryland Dam Safety regulatory agency, Summit Hall Park Dam has a fair condition assessment and a high hazard potential. Despite its moderate risk rating, the dam is regularly inspected and meets state permitting and enforcement requirements. With a spillway width of 38 feet and a maximum discharge capacity of 1000 cubic feet per second, the dam is equipped to handle potential flood events and ensure public safety.

Surrounded by the scenic Muddy Branch-TR river, Summit Hall Park Dam plays a crucial role in water resource management in Montgomery County, Maryland. As a key infrastructure for water supply, the dam serves as a testament to the importance of maintaining and monitoring critical water resources in the face of changing climate conditions and increasing water demands.

Year Completed

1993

Dam Length

700

Dam Height

14

River Or Stream

Muddy Branch-TR

Primary Dam Type

Arch

Surface Area

0.5

Drainage Area

0.1

Nid Storage

16

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

14
       
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.