Thorston B-2 Reservoir Report
Nearby: Thorston B-2a Swedeburg 2b-2f
Last Updated: December 12, 2025
Thorston B-2, a significant flood risk reduction structure located in Saunders, Nebraska, was completed in 1954 under the design of the USDA NRCS.
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Summary
Standing at a height of 26 feet with a hydraulic height of 22.96 feet, this earth dam spans 734 feet and serves the primary purpose of flood risk reduction along the TR-Wahoo Creek. With a normal storage capacity of 14.4 acre-feet and a drainage area of 0.53 square miles, Thorston B-2 plays a crucial role in managing water flow in the region.
Maintained by the Nebraska Department of Natural Resources, Thorston B-2 has a low hazard potential and is deemed to be in satisfactory condition as of the last assessment in 2016. Despite its age, the dam continues to provide essential flood protection to the local community, with a maximum discharge capacity of 399 cubic feet per second. With a total storage capacity of 217.1 acre-feet and a surface area of 3.6 acres, Thorston B-2 showcases the importance of well-designed infrastructure in mitigating the impacts of climate change on water resources.
With its efficient design and successful track record in flood risk reduction, Thorston B-2 stands as a testament to the dedication of local government agencies and the USDA NRCS in safeguarding communities against water-related disasters. As climate change continues to pose challenges to water management, structures like Thorston B-2 play a critical role in ensuring the resilience of communities in Saunders, Nebraska, and beyond. By upholding rigorous inspection and maintenance practices, Thorston B-2 remains a vital asset in the fight against water-related hazards, showcasing the power of strategic infrastructure in climate adaptation efforts.
Year Completed |
1954 |
Dam Length |
734 |
Dam Height |
26 |
River Or Stream |
TR-WAHOO CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.6 |
Hydraulic Height |
22.96 |
Drainage Area |
0.53 |
Nid Storage |
217.1 |
Structural Height |
32 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wahoo Creek At Ithaca
|
53cfs |
Rock Creek Near Ceresco
|
14cfs |
Wahoo Cr At Ashland
|
78cfs |
Platte River Nr Leshara
|
5270cfs |
Salt Creek At Greenwood
|
125cfs |
Platte R Nr Ashland
|
6290cfs |
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.
Thorston B-2