North Oak Creek 1-A Reservoir Report
Last Updated: December 5, 2025
North Oak Creek 1-A is a key flood risk reduction structure located in Lancaster, Nebraska, owned and operated by the local government.
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Summary
Designed by the USDA NRCS and regulated by the NE DNR, this earth dam stands at a height of 48 feet with a hydraulic height of 47 feet, providing crucial protection to the surrounding area. Completed in 1979, the dam has a storage capacity of 3222.2 acre-feet, serving a drainage area of 7.85 square miles and boasting a maximum discharge capacity of 4372 cubic feet per second.
With a high hazard potential but a satisfactory condition assessment as of June 2020, North Oak Creek 1-A plays a vital role in managing water resources in the region. Its primary purpose is flood risk reduction, aligning with its construction specifications as an earth dam with a stone core and soil foundation. The dam's normal storage capacity of 948.7 acre-feet and surface area of 107.4 acres make it a crucial asset in mitigating flood risks and protecting local communities along Wagon Tongue Creek. Regular inspections and adherence to regulatory standards ensure the dam's continued effectiveness in safeguarding the area from potential inundation events.
Year Completed |
1979 |
Dam Length |
1910 |
Dam Height |
48 |
River Or Stream |
WAGON TONGUE CREEK |
Primary Dam Type |
Earth |
Surface Area |
107.4 |
Hydraulic Height |
47 |
Drainage Area |
7.85 |
Nid Storage |
3222.2 |
Structural Height |
54 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
54 |
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.
North Oak Creek 1-A
Wild Wood