Semm Grade Stabilization Dam Reservoir Report
Nearby: South Branch 27 South Branch 63
Last Updated: December 6, 2025
The Semm Grade Stabilization Dam, located in Cook, Nebraska along the TR-Turkey Creek, was completed in 1994 by the USDA NRCS to serve various purposes including flood risk reduction.
°F
°F
mph
Wind
%
Humidity
Summary
As an earth dam with a height of 27 feet and a length of 639 feet, it provides a storage capacity of 178 acre-feet and covers a surface area of 5 acres. The dam is regulated by the Nebraska Department of Natural Resources and undergoes regular inspections to ensure its structural integrity.
This privately owned dam, designed by the Natural Resources Conservation Service, plays a crucial role in managing the water resources in Johnson County, Nebraska. With a low hazard potential and a satisfactory condition assessment, the Semm Grade Stabilization Dam demonstrates its effectiveness in mitigating flood risks and maintaining water quality in the area. The dam's location in a rural setting highlights its importance in sustainable water management practices and climate resiliency efforts.
With its stone core and soil foundation, the Semm Grade Stabilization Dam stands as a testament to the collaborative efforts between private owners and government agencies in safeguarding water resources. Its presence along TR-Turkey Creek not only protects the surrounding areas from potential flooding but also contributes to the overall environmental health of the region. As climate change continues to impact water availability and quality, structures like the Semm Grade Stabilization Dam play a crucial role in ensuring the sustainable management of water resources for future generations.
Year Completed |
1994 |
Dam Length |
639 |
Dam Height |
27 |
River Or Stream |
TR-TURKEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
25 |
Drainage Area |
0.9 |
Nid Storage |
178 |
Structural Height |
31 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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.
Semm Grade Stabilization Dam