Prock Lake Dam Reservoir Report
Last Updated: December 13, 2025
Prock Lake Dam, also known as Roy Prock Lake Dam, is a privately owned structure located in Hendricks, Indiana.
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Summary
Completed in 1979, this earth dam stands at a height of 57 feet and serves primarily for recreational purposes. It spans 900 feet in length and holds a maximum storage capacity of 772 acre-feet, with a normal storage level of 525 acre-feet.
Situated on an unnamed tributary of the West Fork White Lick Creek, Prock Lake Dam is regulated by the Indiana Department of Natural Resources and undergoes regular inspections to ensure its fair condition. With a spillway width of 600 feet and a maximum discharge of 1882 cubic feet per second, the dam presents a high hazard potential but is considered to have a moderate risk level. Its hazard potential, combined with its recreational importance and geographic significance, make it an intriguing site for water resource and climate enthusiasts to explore and study.
Despite its high hazard potential, Prock Lake Dam continues to provide essential recreational opportunities and water storage functions in the region. With Lewis Engineering as its designer and a history of state regulation and inspection, this dam represents a balancing act between human activity and environmental stewardship in the face of changing climate conditions. For those interested in water resource management and climate adaptation, Prock Lake Dam offers a compelling case study of the challenges and opportunities associated with maintaining and utilizing critical infrastructure in a dynamic natural environment.
Year Completed |
1979 |
Dam Length |
900 |
Dam Height |
57 |
River Or Stream |
UNNAMED TRIBUTARY WEST FORK WHITE LICK CREEK |
Primary Dam Type |
Earth |
Surface Area |
34 |
Hydraulic Height |
51 |
Drainage Area |
0.82 |
Nid Storage |
772 |
Structural Height |
57 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
57 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Prock Lake Dam