Twp Road 29 Reservoir Report
Nearby: Coon Creek 28 & 33 Coon Creek 34 & 35
Last Updated: December 12, 2025
Twp Road 29 is a crucial earth dam located in Lyon County, Minnesota, designed for flood risk reduction along the Cottonwood River.
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Summary
Completed in 1999, this structure stands at a height of 22 feet and spans 500 feet in length, with a storage capacity of 3,235 acre-feet. Despite its low hazard potential, the dam is currently assessed to be in poor condition, highlighting the importance of regular inspections and maintenance to ensure its effectiveness in mitigating flood risks.
Managed by the local government, Twp Road 29 falls under the regulatory oversight of the Minnesota Department of Natural Resources - Division of Ecological and Water Resources. The dam's spillway type is uncontrolled, with a width of 6 feet, allowing for a maximum discharge of 573 cubic feet per second. While the dam is not equipped with outlet gates, its primary purpose remains focused on flood risk reduction, serving the surrounding community of Russell and contributing to the overall water resource management efforts in the region.
As water resource and climate enthusiasts, understanding the structural integrity and functionality of dams like Twp Road 29 is essential for ensuring the safety and resilience of communities in the face of changing weather patterns and increased flood risks. With a moderate risk assessment rating and a history of poor condition, stakeholders must prioritize proactive measures to address maintenance needs and enhance the dam's capacity to protect lives and property in the event of flooding events along the Cottonwood River.
Year Completed |
1999 |
Dam Length |
500 |
Dam Height |
19 |
River Or Stream |
COTTONWOOD RIVER-TR |
Primary Dam Type |
Earth |
Drainage Area |
4 |
Nid Storage |
3235 |
Structural Height |
22 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
22 |
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.
Twp Road 29