North Oak Creek 6-C Reservoir Report
Last Updated: December 6, 2025
North Oak Creek 6-C is a flood risk reduction structure located in Valparaiso, Nebraska, designed by the USDA NRCS and completed in 1977.
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Summary
This earth dam stands 47 feet high, with a hydraulic height of 45 feet and a length of 793 feet. It serves the primary purpose of flood risk reduction for the North Oak Creek, offering a storage capacity of 867 acre-feet and a normal storage of 276 acre-feet over a drainage area of 3.1 square miles. The dam has a low hazard potential and is in satisfactory condition as of the last assessment in September 2019.
Managed by the Nebraska Department of Natural Resources, North Oak Creek 6-C is subject to state regulation, permitting, inspection, and enforcement. Perched in Butler County, the structure plays a crucial role in mitigating flood risks and protecting the surrounding area. With a maximum discharge capacity of 724 cubic feet per second, this dam contributes to the overall water resource management in the region. Despite its low hazard potential, the dam is regularly monitored and inspected to ensure its continued effectiveness in flood control.
The location of North Oak Creek 6-C, along with its design and construction by the Natural Resources Conservation Service, highlights the collaborative efforts to manage water resources and address climate-related challenges in Nebraska. As a key component in the flood risk reduction infrastructure, this earth dam serves as a vital resource for the community and underscores the importance of proactive measures in safeguarding against potential water-related disasters. The structure's history, specifications, and operational details underscore its significance in water resource management and climate resilience efforts in the region.
Year Completed |
1977 |
Dam Length |
793 |
Dam Height |
47 |
River Or Stream |
TR-NORTH OAK CREEK |
Primary Dam Type |
Earth |
Surface Area |
29 |
Hydraulic Height |
45 |
Drainage Area |
3.1 |
Nid Storage |
867 |
Structural Height |
47 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wahoo Creek At Ithaca
|
53cfs |
Platte River At North Bend
|
4920cfs |
Oak Creek At Air Park Rd At Lincoln
|
15cfs |
Little Salt Creek Near Lincoln
|
3cfs |
Rock Creek Near Ceresco
|
14cfs |
Salt Creek At 70th St. At Lincoln
|
98cfs |
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 6-C
Timber Point