Bellevue Lake Dam Reservoir Report

Last Updated: December 5, 2025

Bellevue Lake Dam, also known as Stoney Creek Dam, is a privately owned gravity dam located in New Castle, Delaware.


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Summary

Built in 1933, it serves primarily as a water supply for the area, with a storage capacity of 145 acre-feet and a normal storage level of 125.57 acre-feet. The dam stands at a height of 15 feet and spans a length of 330 feet, containing a spillway width of 30 feet for controlled water release.

Despite its critical role in water supply, Bellevue Lake Dam has a high hazard potential, with a very high risk assessment rating. While the dam's condition is currently not rated, it is essential for stakeholders to monitor and assess its structural integrity regularly. The dam is not state-regulated, inspected, or enforced, making it crucial for the private owner to take responsibility for its maintenance and emergency preparedness.

With Lisa Blunt Rochester serving as the Congressional Representative for the area, Bellevue Lake Dam remains a key infrastructure for water resource management in the region. As water resource and climate enthusiasts, it is vital to ensure the continued safety and functionality of this dam to mitigate potential risks and safeguard the surrounding community and environment.

Year Completed

1933

Dam Length

330

Dam Height

15

River Or Stream

STONEY CREEK

Primary Dam Type

Gravity

Surface Area

14.29

Drainage Area

2

Nid Storage

145

Outlet Gates

Other Controlled - 2

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

15
       
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.