Monter Group Dam Reservoir Report
Nearby: Dwinell Dam Sergel Dam
Last Updated: December 6, 2025
Monter Group Dam, located in Arapahoe, Nebraska, is a privately owned structure designed by the USDA NRCS to primarily reduce flood risks along the TR-Muddy Creek.
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Summary
Completed in 1979, this earth dam stands at 33 feet tall with a hydraulic height of 33 feet and a structural height of 35 feet. With a storage capacity of 303 acre-feet and a drainage area of 2.3 square miles, Monter Group Dam plays a crucial role in managing water flow and preventing potential flooding in the area.
Managed by the Nebraska Department of Natural Resources, Monter Group Dam has a low hazard potential and is rated as being in satisfactory condition as of the last inspection in April 2019. The dam's normal storage capacity is 58 acre-feet with a maximum discharge rate of 5089 cubic feet per second. Despite its relatively small surface area of 8 acres, Monter Group Dam serves as a vital piece of infrastructure for flood control in the region, showcasing effective design and engineering by the Natural Resources Conservation Service.
In addition to its flood risk reduction purpose, Monter Group Dam stands as a testament to successful collaboration between private ownership and state regulatory agencies. With a solid foundation of soil and core made of stone, this dam exemplifies the importance of proactive water resource management in mitigating potential climate-related disasters. As water resource and climate enthusiasts, the significance of Monter Group Dam lies not only in its structural integrity but also in its essential role in safeguarding communities and ecosystems from the impacts of extreme weather events.
Year Completed |
1979 |
Dam Length |
1083 |
Dam Height |
33 |
River Or Stream |
TR-MUDDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
33 |
Drainage Area |
2.3 |
Nid Storage |
303 |
Structural Height |
35 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Republican River At Cambridge
|
60cfs |
Beaver Creek Near Beaver City
|
1cfs |
Platte River Near Overton
|
1040cfs |
Spring Creek Nr Overton
|
7cfs |
Red Willow Creek Near Red Willow
|
3cfs |
Sappa C Nr Lyle
|
1cfs |
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.
Monter Group Dam