Landson Le Reservoir Report
Last Updated: December 18, 2025
Landson Le, located in Weleetka, Oklahoma, is a privately owned Earth dam completed in 1972 on the TR-North Canadian River.
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Summary
This dam stands at a height of 22 feet, with a maximum storage capacity of 90 acre-feet and a normal storage level of 35 acre-feet. It has a controlled spillway with a width of 1 foot and a single valve outlet gate. Despite being classified as low hazard potential, Landson Le is considered to have a very high risk assessment rating.
Managed by the Oklahoma Water Resources Board, Landson Le is subject to state regulation, permitting, inspection, and enforcement. While the dam itself has not been rated for its condition assessment, it has a scheduled inspection frequency of 5 years, with the last inspection conducted in August 2011. The dam's risk management measures and emergency action plan status are currently unspecified, indicating potential areas for improvement in its overall safety and readiness for potential hazards. Enthusiasts of water resources and climate in the region may find Landson Le an intriguing case study for its combination of low hazard potential with a high risk assessment.
Year Completed |
1972 |
Dam Length |
410 |
Dam Height |
22 |
River Or Stream |
TR-NORTH CANADIAN RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
90 |
Structural Height |
22 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Canadian River Near Wetumka
|
308cfs |
Canadian River At Calvin
|
336cfs |
Little River Near Sasakwa
|
9cfs |
Deep Fork Near Beggs
|
98cfs |
North Canadian River At Shawnee
|
174cfs |
Little River Near Tecumseh
|
10cfs |
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.
Landson Le