Rockefeller Reservoir Report

Last Updated: December 15, 2025

Rockefeller, also known as Peggys Pond, is a privately owned dam located in Plymouth, Vermont.


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Summary

Managed by the USDA NRCS, this Earth-type dam serves primarily for recreational purposes and was completed in 1970. With a height of 31 feet and a length of 292 feet, Rockefeller has a storage capacity of 44 acre-feet and covers a surface area of 4 acres.

Despite its significant hazard potential and poor condition assessment, Rockefeller is regulated by the Vermont Department of Environmental Conservation (DEC) and undergoes regular inspections. The dam is equipped with an uncontrolled spillway and is situated on the Woodward Reservoir-TR river or stream. Its risk assessment is moderate, and while there are no associated locks or outlet gates, the dam's maintenance and emergency preparedness are crucial for ensuring public safety and environmental protection.

Located in Windsor County, Vermont, Rockefeller is a vital piece of infrastructure that not only provides recreational opportunities but also requires careful oversight and management to mitigate potential risks associated with its operation. As a focal point for water resource and climate enthusiasts, understanding the complexities of Rockefeller's structure and regulatory framework is essential for safeguarding its functionality and ensuring the well-being of the surrounding community.

Year Completed

1970

Dam Length

292

Dam Height

31

River Or Stream

WOODWARD RESERVOIR-TR

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

31

Drainage Area

0.14

Nid Storage

44

Structural Height

31

Hazard Potential

Significant

Foundations

Soil

Nid Height

31
       
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.