Robinsons Slang Reservoir Report

Last Updated: December 13, 2025

Robinsons Slang, also known as East Slang, is a state-regulated earth dam located in Ferrisburgh, Vermont.


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Summary

Completed in 1956, this dam primarily serves recreational purposes and stands at a height of 15 feet with a length of 500 feet. Situated on the East Slang-TR river or stream, this structure holds a storage capacity of 99 acre-feet and covers a surface area of 6 acres.

Managed by the Vermont Department of Environmental Conservation (DEC), Robinsons Slang poses a low hazard potential and has not been rated in terms of its condition assessment. The dam undergoes inspections every 10 years, with the last one conducted in April 2004. While it lacks specific emergency action plans and inundation maps, the dam remains under state jurisdiction and is subject to regular permitting, inspection, and enforcement measures to ensure public safety and environmental protection.

Overall, Robinsons Slang represents a vital piece of Vermont's water resource infrastructure, providing both recreational opportunities and flood control benefits. Its presence on the East Slang-TR river contributes to the local ecosystem and serves as a testament to the state's commitment to water management and climate resilience. As water resource and climate enthusiasts, understanding the role of structures like Robinsons Slang is crucial in safeguarding our natural environment and promoting sustainable water practices for future generations.

Year Completed

1956

Dam Length

500

Dam Height

15

River Or Stream

EAST SLANG-TR

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

15

Drainage Area

0.76

Nid Storage

99

Structural Height

15

Hazard Potential

Low

Foundations

Soil

Nid Height

15
       
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.