Gdowski Dam Reservoir Report
Last Updated: December 15, 2025
Gdowski Dam, located in Nance, Nebraska, was completed in 1967 and is currently regulated by the Nebraska Department of Natural Resources.
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Summary
This earth dam, designed by USDA NRCS, serves multiple purposes including fire protection, stock containment, and small fish pond management. With a height of 15 feet and a length of 360 feet, the dam has a storage capacity of 78 acre-feet and a drainage area of 0.9 square miles.
Despite its low hazard potential, Gdowski Dam's condition assessment is currently rated as poor, with the last inspection conducted in April 2020. The dam's emergency action plan status, risk assessment, and inundation maps preparation are all listed as pending. The dam is owned privately and falls under the jurisdiction of the state, with inspection, enforcement, and permitting responsibilities carried out by the NE DNR. Water resource and climate enthusiasts may find Gdowski Dam an intriguing case study for its multi-functional design and regulatory complexities in a rural setting.
Year Completed |
1967 |
Dam Length |
360 |
Dam Height |
15 |
River Or Stream |
TR-CEDAR RIVER |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
14 |
Drainage Area |
0.9 |
Nid Storage |
78 |
Structural Height |
16 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Loup River Power Canal Near Genoa
|
93cfs |
Beaver Creek At Genoa
|
114cfs |
Loup River Near Genoa
|
2300cfs |
Silver Cr
|
3cfs |
Prairie Creek Nr Silver Creek Nebr
|
5cfs |
Warm Slough Nr Central City
|
0cfs |
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.
Gdowski Dam