Rosenthal Dam Reservoir Report
Last Updated: December 6, 2025
Rosenthal Dam, located in Talmage, Nebraska, is a local government-owned structure designed by USDA NRCS and regulated by the Nebraska Department of Natural Resources.
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Summary
Completed in 1954, this earth dam stands at a height of 28.3 feet and spans 395 feet in length, with a storage capacity of 31.4 acre-feet. Situated on Jones Creek, the dam serves as a crucial water resource for the region with a low hazard potential.
Despite its importance, Rosenthal Dam has not been rated for its condition as of the last inspection in May 2017. The dam features a spillway type and width, but lacks information on surface area and drainage, indicating a need for further data collection and assessment. With a maximum discharge of 582 cubic feet per second, the dam plays a key role in flood control and water management in Johnson County, Nebraska.
Overall, Rosenthal Dam is a significant structure in the local water infrastructure, providing essential benefits for the community while maintaining a low hazard potential. As water resource and climate enthusiasts, it is important to monitor and assess the condition of such dams to ensure their continued safety and effectiveness in managing water resources and mitigating flood risks in the region.
Year Completed |
1954 |
Dam Length |
395 |
Dam Height |
28.3 |
River Or Stream |
JONES CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
28.3 |
Drainage Area |
1.03 |
Nid Storage |
31.4 |
Structural Height |
28.3 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Nemaha River At Auburn
|
82cfs |
Missouri River At Nebraska City
|
22500cfs |
Weeping Water Creek At Union
|
20cfs |
North Fork Big Nemaha River At Humboldt
|
67cfs |
Salt Creek At Roca
|
5cfs |
Nishnabotna River Above Hamburg
|
1350cfs |
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.
Rosenthal Dam