Rediske-Vatland Group Reservoir Report

Last Updated: December 5, 2025

The Rediske-Vatland Group is a privately owned earth dam located in Fillmore, Minnesota, with a primary purpose of flood risk reduction.


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Summary

Built in 1976 by the USDA NRCS, this dam stands at 25 feet tall and spans 46 feet in length, with a storage capacity of 73 acre-feet. Despite its low hazard potential, the dam's condition assessment in 2017 revealed poor structural integrity, indicating a need for maintenance and repair to ensure its continued effectiveness in mitigating flood risks in the area.

Managed by the Minnesota Department of Natural Resources, the Rediske-Vatland Group is subject to state regulations, permitting, inspection, and enforcement to uphold its safety standards. The dam is associated with Donaldson Creek and falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. With a moderate risk assessment rating of 3, there is a need for risk management measures to be implemented to address potential issues and enhance the dam's overall resilience in the face of climate change and evolving water resource challenges in the region.

While the Rediske-Vatland Group serves a critical role in flood risk reduction for the local community, its poor condition and moderate risk assessment underline the importance of proactive maintenance and risk management strategies. As water resource and climate enthusiasts, it is crucial to monitor and support efforts to ensure the longevity and effectiveness of essential infrastructure like the Rediske-Vatland Group to safeguard communities and ecosystems against the impacts of extreme weather events and changing environmental conditions.

Year Completed

1976

Dam Length

46

Dam Height

25

River Or Stream

DONALDSON CR-OS

Primary Dam Type

Earth

Drainage Area

0.8

Nid Storage

73

Structural Height

29

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

29
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.