Summary
with a primary purpose of flood risk reduction. Completed in 2014, this earth dam stands at a height of 26.5 feet and spans 765 feet in length, providing a storage capacity of 188.4 acre-feet. With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in mitigating flood risks in the area.
Serving the Swede Creek-TR river/stream, the 121 (Johnson) dam boasts a spillway width of 100 feet and a surface area of 4.7 acres, with a normal storage capacity of 20.6 acre-feet. Despite its relatively low hazard potential, the dam has not been rated for its condition assessment, and there are no emergency action plans prepared or last inspection dates recorded. However, with its strategic location and design, this dam contributes significantly to the flood risk reduction efforts in the region.
Managed by the Tulsa District of the US Army Corps of Engineers, the 121 (Johnson) dam has had no federal agency involvement in its funding, design, construction, regulation, inspection, or operation. With its buttress core type and uncontrolled spillway, this dam exemplifies a local government initiative to address flood risks and protect the surrounding communities from potential water resource-related hazards.
Year Completed |
2014 |
Dam Length |
765 |
Dam Height |
26.5 |
River Or Stream |
SWEDE CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
4.7 |
Hydraulic Height |
24.5 |
Drainage Area |
0.66 |
Nid Storage |
188.4 |
Structural Height |
32 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
32 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Eisenhower State Park
|
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Turkey Point - Melvern Lake
|
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Sun Dance - Melvern Lake
|
121 (Johnson)