Island Lake 22 & 23 Reservoir Report
Nearby: Island Lake 13 & 24 Lynd Twp 30
Last Updated: December 13, 2025
Island Lake 22 & 23 is a water resource managed by the Lyon County Highway Department in Minnesota.
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Summary
This dam structure, completed in 1999, is designed as a buttress type with a height of 33 feet and a length of 730 feet. It has a storage capacity of 530 acre-feet and serves the purpose of regulating Threemile Creek's flow. The dam is regulated by the Minnesota Department of Natural Resources and undergoes inspections every 8 years, with a low hazard potential rating.
Located in S22 T111N R43W, Island Lake 22 & 23 contributes to the local water management and conservation efforts in Lyon County, Minnesota. Despite its age, the dam's condition is currently not rated, and there are no emergency action plans in place. This water resource, situated near the Threemile Creek, plays a crucial role in the region's hydrological cycle and environmental sustainability. With its state-regulated status and inspection protocols, Island Lake 22 & 23 ensures the safety and reliability of its operations.
For water resource and climate enthusiasts, Island Lake 22 & 23 presents a fascinating case study in dam infrastructure management and regulatory oversight. As a locally owned structure with a significant storage capacity, this dam on Threemile Creek showcases the collaboration between the Lyon County Highway Department and the Minnesota Department of Natural Resources in ensuring the integrity of water resources. With its low hazard potential and state-regulated status, Island Lake 22 & 23 stands as a testament to responsible water management practices in the region.
Year Completed |
1999 |
Dam Length |
730 |
Dam Height |
33 |
River Or Stream |
THREEMILE CREEK |
Drainage Area |
21.4 |
Nid Storage |
530 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
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.
Island Lake 22 & 23