North Oak Creek 6-G Reservoir Report
Last Updated: December 6, 2025
North Oak Creek 6-G is a vital flood risk reduction structure located in Butler County, Nebraska.
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Summary
Built in 1979 by the USDA NRCS, this earth dam stands at a height of 40 feet and spans 850 feet, with a storage capacity of 506 acre-feet. Situated on the TR-North Oak Creek, the dam serves the primary purpose of flood risk reduction for the local community of Valparaiso. With a drainage area of 1.5 square miles, the dam has a significant hazard potential but is currently assessed as being in satisfactory condition as of May 2020.
Managed by the Nebraska Department of Natural Resources, North Oak Creek 6-G is subject to state regulation, permitting, inspection, and enforcement. The dam's inspection frequency is set at three years, and its last inspection in May 2020 deemed it to be in satisfactory condition. Although no emergency action plan (EAP) has been prepared for the structure, it meets state guidelines and has not undergone recent revisions. Despite its significant hazard potential, the dam's risk assessment, DSAC assignment date, and risk management measures remain unspecified at this time.
North Oak Creek 6-G represents a crucial piece of infrastructure in the flood-prone region of Butler County, Nebraska. With its earth dam construction and stone core, the structure plays a key role in mitigating flood risks and protecting the surrounding community. As water resource and climate enthusiasts, understanding the design, purpose, and regulatory oversight of dams like North Oak Creek 6-G is essential for ensuring the safety and resilience of our water infrastructure in the face of changing climate patterns and increasing flood risks.
Year Completed |
1979 |
Dam Length |
850 |
Dam Height |
39 |
River Or Stream |
TR-NORTH OAK CREEK |
Primary Dam Type |
Earth |
Surface Area |
19 |
Hydraulic Height |
39 |
Drainage Area |
1.5 |
Nid Storage |
506 |
Structural Height |
40 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
40 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wahoo Creek At Ithaca
|
53cfs |
Oak Creek At Air Park Rd At Lincoln
|
15cfs |
Little Salt Creek Near Lincoln
|
3cfs |
Platte River At North Bend
|
4920cfs |
Rock Creek Near Ceresco
|
14cfs |
Salt Creek At 70th St. At Lincoln
|
92cfs |
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-G
Timber Point