Fleetwood Pond Dam Reservoir Report

Last Updated: December 5, 2025

Fleetwood Pond Dam, also known as Tyndalls Dam, is a gravity dam located in Cherry Tree Landing, Sussex County, Delaware.


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Summary

Built in 1968 for the primary purpose of recreation, this dam stands at a height of 10.65 feet and has a length of 530 feet. With a normal storage capacity of 101.79 acre-feet and a maximum discharge of 403 cubic feet per second, this dam plays a crucial role in managing the water resources of the Tyndall Branch river.

Managed by the Delaware Department of Natural Resources and Environmental Control (DNREC), Fleetwood Pond Dam is regulated and inspected regularly to ensure its structural integrity and public safety. The dam has a controlled spillway with a width of 34 feet and is equipped with six other controlled outlet gates. While the dam's hazard potential is rated as high, its current condition assessment is fair. Despite its risk level being classified as very high, the dam's risk management measures and emergency action plan are not explicitly outlined in the available data.

Water resource and climate enthusiasts interested in the management and maintenance of dams will find Fleetwood Pond Dam to be an intriguing case study. With its historical significance, structural details, and regulatory oversight, this dam serves as a focal point for understanding the intersection of water infrastructure, environmental protection, and public safety in the state of Delaware.

Year Completed

1968

Dam Length

530

Dam Height

10.65

River Or Stream

TYNDALL BRANCH

Primary Dam Type

Gravity

Surface Area

34.62

Drainage Area

21.43

Nid Storage

206

Outlet Gates

Other Controlled - 6

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

11
       
Seasonal Comparison

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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.