Otter Creek Lake Dam Reservoir Report
Nearby: Chizek Dam Velky Dam
Last Updated: December 5, 2025
Otter Creek Lake Dam, located in Tama, Iowa, stands as a testament to the harmonious blend of water resource management and climate conservation efforts.
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Summary
Constructed in 1968, this earth dam spans 935 feet in length and reaches a height of 45 feet, providing critical water storage capacity for the region. With a primary purpose focused on recreation, the dam not only safeguards the surrounding area from potential flood risks but also offers a scenic backdrop for outdoor enthusiasts to enjoy.
Managed by the local government and regulated by the Iowa Department of Natural Resources, Otter Creek Lake Dam undergoes regular inspections to ensure its structural integrity and operational safety. Despite being classified with a significant hazard potential, the dam received a satisfactory condition assessment in 2017. Its spillway, although uncontrolled, remains effective in managing water flow, while the dam's core foundation of stone and soil ensures stability in various weather conditions. With a moderate risk assessment level, the dam continues to play a crucial role in water resource management for the community.
Otter Creek Lake Dam's strategic location along the Otter Creek river not only enhances the region's drainage and water storage capabilities but also contributes to the overall environmental resilience of the area. As climate change increasingly impacts water resources, this dam stands as a vital infrastructure asset that balances the needs of recreation, flood protection, and environmental conservation. By prioritizing safety, regulation, and risk management measures, Otter Creek Lake Dam remains a beacon of sustainable water resource management practices in Iowa.
Year Completed |
1968 |
Dam Length |
935 |
Dam Height |
45 |
River Or Stream |
OTTER CREEK |
Primary Dam Type |
Earth |
Surface Area |
60 |
Drainage Area |
1.74 |
Nid Storage |
1290 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
45 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Richland Creek Near Haven
|
12cfs |
Salt Creek Near Elberon
|
42cfs |
Walnut Creek Near Hartwick
|
13cfs |
Timber Creek Near Marshalltown
|
37cfs |
Iowa River Near Belle Plaine
|
966cfs |
Wolf Creek Near Dysart
|
35cfs |
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.
Otter Creek Lake Dam
ATV Trail Tama