Mt. Tom Wildlife Marsh Reservoir Report

Last Updated: December 5, 2025

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Summary

Tom Wildlife Marsh, also known as Ri Noname #3, is a private fish and wildlife pond located in Exeter, Rhode Island. Managed by the USDA NRCS, this gravity dam was completed in 1964 and serves as a habitat for various species of fish and wildlife. With a normal storage capacity of 130 acre-feet and a surface area of 25 acres, this marsh plays a vital role in supporting the local ecosystem.

Despite its importance in providing recreational opportunities and supporting wildlife, the condition assessment of Mt. Tom Wildlife Marsh is rated as poor, with a very high risk level of 1. The dam structure, with a height of 8 feet and a length of 230 feet, faces potential hazards and requires attention to ensure its safety and functionality. The dam's spillway type is controlled, with a width of 40 feet, and it is equipped with vertical lift outlet gates.

Water resource and climate enthusiasts visiting Mt. Tom Wildlife Marsh can appreciate its role in conservation efforts and enjoy the beauty of the surrounding area. With a low hazard potential but a high risk level, there is a need for ongoing monitoring and maintenance to safeguard this valuable ecosystem and ensure its continued contribution to the region's biodiversity and recreational opportunities.

Year Completed

1964

Dam Length

230

Dam Height

6

River Or Stream

WOODY HILL BROOK

Primary Dam Type

Gravity

Surface Area

25

Hydraulic Height

4

Drainage Area

2

Nid Storage

180

Structural Height

8

Outlet Gates

Vertical Lift

Hazard Potential

Low

Foundations

Soil

Nid Height

8
       
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.