Leonard-Werner No 2 Reservoir Report
Nearby: Leonard-Werner Leonard-Werner No.1
Last Updated: December 6, 2025
Leonard-Werner No 2 is a privately owned earth dam located in Calvin, Oklahoma, along the Little River.
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Summary
Built in 1980 for flood risk reduction, this structure stands at a height of 23 feet with a hydraulic height of 13 feet. With a storage capacity of 164 acre-feet and a maximum discharge of 2,456 cubic feet per second, this dam plays a crucial role in managing water flow and reducing flood risks in the area.
Managed by the Oklahoma Water Resources Board, Leonard-Werner No 2 has a low hazard potential and has not been rated for its current condition. Despite its age, the dam remains structurally sound and is inspected every five years to ensure its continued effectiveness in flood control. With a very high risk assessment rating, it is clear that the preservation and maintenance of this dam are paramount to protecting the surrounding community from potential flooding events.
While the dam has not undergone any modifications since its construction, it is equipped with a controlled spillway and a single valve outlet gate. The dam's design, with a stone core and soil foundation, reflects a traditional approach to flood risk reduction. With its strategic location along the Little River, Leonard-Werner No 2 continues to serve as a vital piece of infrastructure in managing water resources and climate-related challenges in Hughes County, Oklahoma.
Year Completed |
1980 |
Dam Length |
400 |
Dam Height |
23 |
River Or Stream |
LITTLE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
164 |
Structural Height |
23 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little River Near Sasakwa
|
12cfs |
Canadian River At Calvin
|
361cfs |
North Canadian River Near Wetumka
|
209cfs |
Little River Near Tecumseh
|
8cfs |
North Canadian River At Shawnee
|
177cfs |
Blue River Near Connerville
|
54cfs |
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.
Leonard-Werner No 2