Pinestone Lake Dam Reservoir Report

Last Updated: December 5, 2025

Pinestone Lake Dam, also known as Lanesville Reservoir Dam, is a privately owned structure located in Harrison, Indiana.


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Summary

Completed in 1958, this earth dam stands at a height of 27 feet and has a structural height of 35 feet, with a length of 420 feet. The dam serves primarily for water supply purposes, with a storage capacity of 192 acre-feet and a normal storage level of 98 acre-feet.

Situated on Panther Creek, Pinestone Lake Dam has a spillway type of "Uncontrolled" with a spillway width of 57 feet. The dam covers a surface area of 11.94 acres and has a drainage area of 0.65 square miles. Although it has a hazard potential rated as "High", the condition assessment as of July 2008 was deemed "Fair", with a moderate risk level of 3. Regular inspections are conducted every two years to ensure the safety and integrity of the dam. While the dam is not owned or funded by any federal agency, it is regulated and permitted by the Indiana Department of Natural Resources (IDNR).

In the event of an emergency, the dam does not have an Emergency Action Plan (EAP) in place, and there are no inundation maps prepared. Despite the moderate risk associated with Pinestone Lake Dam, appropriate risk management measures are yet to be detailed. With its significant role in water supply and recreation, continued monitoring and maintenance of this dam are essential to safeguard the surrounding community and environment from potential hazards.

Year Completed

1958

Dam Length

420

Dam Height

27

River Or Stream

PANTHER CREEK

Primary Dam Type

Earth

Surface Area

11.94

Hydraulic Height

27

Drainage Area

0.65

Nid Storage

192

Structural Height

35

Outlet Gates

Valve

Hazard Potential

High

Nid Height

35
       
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.