Olson Dam Reservoir Report
Nearby: Adamson Dam Johnson Dam
Last Updated: December 10, 2025
Olson Dam, located in Decatur County, Iowa, was completed in 1964 and is primarily used for fire protection, stock watering, and as a small fish pond.
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Summary
Managed by a private owner, this earth dam stands at a height of 25 feet with a length of 408 feet, providing a storage capacity of 53 acre-feet. The dam is situated on TR-STEELE CREEK and is regulated by the Iowa Department of Natural Resources, ensuring its compliance with state permitting, inspection, and enforcement standards.
With a low hazard potential and a moderate risk assessment rating, Olson Dam presents a reliable water resource for the surrounding area. While it has not been assigned a condition assessment rating, the dam's structural integrity and safety measures are continuously monitored. Despite its uncontrolled spillway type and limited drainage area of 0.12 square miles, Olson Dam serves as a vital water management structure in the region, supporting agricultural activities and wildlife habitats.
Water resource and climate enthusiasts will appreciate the strategic placement and functionality of Olson Dam, contributing to the local ecosystem while providing essential services for fire protection and agricultural needs. As a part of the Rock Island District, this dam reflects the collaboration between private ownership and federal agencies such as the Natural Resources Conservation Service in ensuring the efficient operation and maintenance of water infrastructure in Iowa. The dam's historical significance and ongoing role in water management make it a noteworthy site for those interested in sustainable water resource practices and climate resilience efforts.
Year Completed |
1964 |
Dam Length |
408 |
Dam Height |
25 |
River Or Stream |
TR-STEELE CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.12 |
Nid Storage |
53 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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 |
|---|---|---|
Buck Stop Camp
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Bottom Oak Camp
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White Oak Camp
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Black Oak Camp
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Longbeard Camp
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Olson Dam