Gross Dam 1 Reservoir Report
Nearby: Barnett Dam Gross Dam 2
Last Updated: December 6, 2025
Gross Dam 1, located in Gosper, Nebraska, is a privately owned earth dam primarily designed for fire protection, stock, or small fish pond purposes.
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Summary
Constructed in 1961 by the USDA NRCS, this dam stands at a height of 13 feet with a length of 295 feet, providing a storage capacity of 118 acre-feet. Despite its low hazard potential, the dam's condition assessment is rated as poor based on the last inspection conducted in May 2019.
Managed by the Nebraska Department of Natural Resources, Gross Dam 1 is regulated and inspected by state authorities to ensure its structural integrity and compliance with safety standards. Situated on TR-DEER CREEK, this dam plays a vital role in water resource management within the region, contributing to flood control and irrigation needs. Although the dam's condition is assessed as poor, ongoing maintenance and risk management measures are essential to mitigate any potential hazards and ensure its long-term sustainability.
Located in the Omaha District and within the jurisdiction of Nebraska, Gross Dam 1 serves as a crucial infrastructure for water storage and management in the area. With a drainage area of 4.8 square miles and a normal storage capacity of 46 acre-feet, this dam plays a significant role in supporting agricultural and environmental needs. As climate change impacts water resources, the importance of maintaining and upgrading dams like Gross Dam 1 becomes increasingly essential to ensure sustainable water supply and resilience in the face of changing weather patterns.
Year Completed |
1961 |
Dam Length |
295 |
Dam Height |
13 |
River Or Stream |
TR-DEER CREEK |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
13 |
Drainage Area |
4.8 |
Nid Storage |
118 |
Structural Height |
13 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Gross Dam 1