John Tumlin Pond Dam Reservoir Report

Last Updated: December 5, 2025

John Tumlin Pond Dam, located in Hamilton, Ohio, on TRIB SAND RUN, was completed in 1973 by the USDA NRCS and serves as a recreational water resource for the community.


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Summary

The dam is classified as an Earth dam with a height of 29 feet and a length of 190 feet, providing storage for up to 32 acre-feet of water. The dam has a spillway width of 12 feet and is considered to have a low hazard potential with a moderate risk assessment rating.

Despite being privately owned, John Tumlin Pond Dam is not regulated by the state and does not require permitting, inspection, or enforcement. The dam's primary purpose is recreation, attracting visitors to its 2-acre surface area for activities such as fishing and boating. While its condition assessment is currently not rated, the dam is noted to have an uncontrolled spillway and outlet gates, with no associated locks for navigation.

Overall, John Tumlin Pond Dam stands as a picturesque water resource in Ohio, offering a tranquil setting for outdoor enthusiasts to enjoy nature and engage in recreational activities. Its earth structure, designed by the USDA NRCS, contributes to the local ecosystem and watershed, providing a valuable habitat for wildlife and a source of leisure for the surrounding community.

Year Completed

1973

Dam Length

190

Dam Height

29

River Or Stream

TRIB SAND RUN

Primary Dam Type

Earth

Surface Area

2

Hydraulic Height

29

Drainage Area

0.04

Nid Storage

32

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

29
       
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.