Basin `A' Reservoir Report

Last Updated: December 5, 2025

Basin `A' is a significant Earth dam located in Hamilton, Ohio, with a primary purpose of tailings storage.


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Summary

Constructed in 1976 by THE H. C. NUTTING CO., this dam stands at a height of 50 feet and stretches 5600 feet in length, providing a storage capacity of 1050 acre-feet. Situated along the Ohio River offstream, this dam is regulated by the Department of Natural Resources in Ohio and is subject to state permitting, inspection, and enforcement.

Despite its importance for tailings storage, Basin `A' faces challenges in terms of condition assessment, with its current state rated as poor. The dam has a significant hazard potential, prompting the need for regular inspections every five years. The last inspection took place in April 2016, raising concerns about its structural integrity and overall safety. While the dam has not undergone modifications in recent years, efforts to improve its condition and address potential risks are essential to ensure the protection of surrounding communities and water resources.

With its location in Lawrenceburg, Indiana, Basin `A' serves as a crucial infrastructure for managing water resources in the region, but its poor condition and significant hazard potential highlight the need for proactive risk management measures. As water resource and climate enthusiasts, it is important to stay informed about the current state of Basin `A' and advocate for necessary improvements to safeguard against potential hazards and ensure the sustainable management of water resources in the area.

Year Completed

1976

Dam Length

5600

Dam Height

50

River Or Stream

OHIO RIVER - OFFSTREAM

Primary Dam Type

Earth

Drainage Area

0.04

Nid Storage

1050

Hazard Potential

Significant

Nid Height

50
       
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.