Mau Dam Reservoir Report
Last Updated: December 5, 2025
Mau Dam, located in Thayer, Nebraska, is a privately owned earth dam with a primary purpose of flood risk reduction.
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Summary
Built in 1960, this structure stands at a height of 13.7 meters and has a storage capacity of 86.9 million cubic meters. Situated on the TR-SPRING BRANCH river or stream, Mau Dam plays a crucial role in managing water resources in the area.
Operated under the oversight of the Nebraska Department of Natural Resources, Mau Dam is equipped with state-regulated inspection, permitting, and enforcement measures to ensure its structural integrity and safety. With a low hazard potential and a condition assessment of "Not Rated", this dam serves as a key infrastructure for flood control in the region, protecting surrounding communities from potential water-related risks.
Despite its modest size with a surface area of 8.1 hectares, Mau Dam plays a vital role in the local water management system. As climate change continues to impact precipitation patterns and water resources, the importance of structures like Mau Dam in mitigating flood risks and ensuring water security becomes increasingly evident.
Year Completed |
1960 |
Dam Length |
491 |
Dam Height |
13.7 |
River Or Stream |
TR-SPRING BRANCH |
Primary Dam Type |
Earth |
Surface Area |
8.1 |
Hydraulic Height |
13.7 |
Drainage Area |
0.42 |
Nid Storage |
86.9 |
Structural Height |
13.7 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Blue River Near Fairbury
|
230cfs |
Republican R Nr Hardy
|
97cfs |
Little Blue R At Hollenberg
|
70cfs |
Republican R At Scandia
|
110cfs |
Mill C At Washington
|
8cfs |
Little Blue River Near Deweese
|
40cfs |
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.
Mau Dam