Mmk Dam 1 Reservoir Report
Last Updated: December 15, 2025
Mmk Dam 1, located in Holt County, Nebraska, is a privately owned structure designed by the USDA NRCS and regulated by the Nebraska Department of Natural Resources.
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Summary
Completed in 1977, this earth dam stands at 31 feet high and stretches 174 feet in length, with a primary purpose of flood risk reduction. With a normal storage capacity of 15 acre-feet and a drainage area of 0.2 square miles, this dam plays a crucial role in managing water resources in the region.
Despite its low hazard potential, Mmk Dam 1 is currently assessed as being in poor condition, with its last inspection conducted in April 2014. The dam has a maximum discharge capacity of 32 cubic feet per second and is equipped with outlet gates for water control. While there are no associated structures with the dam, its location along TR-BEACON CREEK highlights its importance in water management for the area. Climate and water resource enthusiasts will find Mmk Dam 1 to be an intriguing case study in the intersection of infrastructure, regulation, and environmental stewardship.
As a key feature in the water management infrastructure of Holt County, Mmk Dam 1 serves as a vital tool in mitigating flood risks and regulating water flow along the TR-BEACON CREEK. Its design and construction by the USDA NRCS reflect a commitment to sustainable water resource management, while its state-regulated status ensures compliance with safety and environmental standards. With ongoing inspections and maintenance, Mmk Dam 1 continues to play a crucial role in safeguarding the community and surrounding areas from potential water-related hazards.
Year Completed |
1977 |
Dam Length |
174 |
Dam Height |
30 |
River Or Stream |
TR-BEAVER CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
27 |
Drainage Area |
0.2 |
Nid Storage |
26 |
Structural Height |
31 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Niobrara River At Mariaville
|
1700cfs |
Long Pine Creek Near Riverview
|
191cfs |
Keya Paha R At Wewela Sd
|
54cfs |
Platte Creek Near Platte
|
3cfs |
Niobrara River Nr. Verdel
|
517cfs |
Ponca Creek At Verdel
|
23cfs |
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.
Mmk Dam 1