Mcninch Lloyd Reservoir Report
Last Updated: December 21, 2025
Mcninch Lloyd is a privately owned dam located in Sparks, Oklahoma, along the TR-COON CREEK.
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Summary
Built in 1960, this earth dam stands at 20 feet tall and stretches 790 feet in length, providing a storage capacity of 150 acre-feet. The dam's primary purpose is classified as "Other" and it is regulated by the Oklahoma Water Resources Board, with state permitting, inspection, and enforcement all in place.
Despite its low hazard potential, Mcninch Lloyd is deemed to have a very high risk assessment, with a risk level of 1. The dam's condition is currently marked as "Not Rated," with the last inspection taking place in May 2011. The structure features a controlled spillway, valve outlet gates, and a surface area of 9 acres. With a maximum discharge of 3000 cubic feet per second, Mcninch Lloyd serves as a critical water resource in the region, contributing to flood control and irrigation.
For water resource and climate enthusiasts, Mcninch Lloyd presents an intriguing case study of a privately owned dam in Oklahoma. With its unique design features and regulatory oversight, this earth dam offers valuable insights into the management and assessment of dams in the state. As discussions around water security and climate change continue to gain traction, understanding the role of structures like Mcninch Lloyd becomes essential for ensuring sustainable water management practices in the future.
Year Completed |
1960 |
Dam Length |
790 |
Dam Height |
20 |
River Or Stream |
TR-COON CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
20 |
Nid Storage |
150 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
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.
Mcninch Lloyd