Oak-Middle 58-B Reservoir Report
Nearby: Oak-Middle 57-A Hudkins Road Dam
Last Updated: December 6, 2025
Oak-Middle 58-B is a significant earth dam located in Raymond, Nebraska, designed by the USDA NRCS to reduce flood risk along the TR-OAK CREEK.
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Summary
Completed in 1965, this dam stands at 42 feet high and spans 820 feet in length, with a storage capacity of 350 acre-feet and a drainage area of 1.1 square miles. Despite its age, the dam has been well-maintained, with a satisfactory condition assessment as of June 2016 and a low hazard potential.
Operated by the local government, Oak-Middle 58-B is regulated, permitted, inspected, and enforced by the Nebraska Department of Natural Resources. While the dam has not undergone any modifications in recent years, its emergency action plan and risk assessment measures are currently not specified. With a primary purpose of flood risk reduction, this structure plays a crucial role in protecting the surrounding area from potential inundation events, with a maximum discharge capacity of 1,084 cubic feet per second. Overall, Oak-Middle 58-B serves as a vital infrastructure for water resource management and climate resilience in Seward County, Nebraska.
Year Completed |
1965 |
Dam Length |
820 |
Dam Height |
40 |
River Or Stream |
TR-OAK CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
39 |
Drainage Area |
1.1 |
Nid Storage |
350 |
Structural Height |
42 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
42 |
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.
Oak-Middle 58-B
Meadow Lark