Stennett-Red Oak Watershed Site 1 Reservoir Report
Last Updated: December 14, 2025
Stennett-Red Oak Watershed Site 1 is a low hazard potential dam located in Montgomery County, Iowa, along the TR-NISHNABOTNA RIVER.
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Summary
Built in 1971, this earth dam serves multiple purposes including fire protection, stock maintenance, and small fish pond management. With a maximum storage capacity of 68 acre-feet and a normal storage of 36 acre-feet, the dam covers a surface area of 6 acres and has a drainage area of 0.31 square miles. Despite being classified as low risk, the dam has a moderate risk assessment rating of 3, highlighting the importance of ongoing monitoring and maintenance.
Owned and regulated by the local government, specifically the Iowa Department of Natural Resources, Stennett-Red Oak Watershed Site 1 is designed and managed by the USDA NRCS. The dam stands at a height of 29 feet and spans a length of 533 feet, with an uncontrolled spillway type. While the dam has not been assessed for its current condition, it is crucial for stakeholders and authorities to ensure that the structure remains in optimal working order to mitigate any potential risks associated with its operation. The site is situated in Red Oak, Iowa, and falls within the jurisdiction of US Army Corps of Engineers' Omaha District.
As a key contributor to flood risk reduction in the area, Stennett-Red Oak Watershed Site 1 plays a vital role in water resource management and climate resilience efforts. With its strategic location along the TR-NISHNABOTNA RIVER, the dam not only provides essential services for fire protection and agricultural purposes but also serves as a valuable asset for the local community. Moving forward, continued collaboration between various agencies, stakeholders, and the public will be essential to ensure the sustainable operation and maintenance of this critical water infrastructure in Montgomery County.
Year Completed |
1971 |
Dam Length |
533 |
Dam Height |
29 |
River Or Stream |
TR-NISHNABOTNA RIVER |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
0.31 |
Nid Storage |
68 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Legion City Park
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Viking Lake State Park Campground
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Viking Lake State Park
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Pilot Grove Co Park
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Hacklebarney Woods County Park
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Stennett-Red Oak Watershed Site 1