Kiltie Reservoir Report
Last Updated: December 5, 2025
Kiltie is a flood risk reduction dam located in Twin Valley, Minnesota, along the Garden Slough river.
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Summary
Built in 1978 by the NRCS with a primary purpose of flood risk reduction, the earth dam stands at 15 feet tall and stretches 440 feet in length. The dam has a storage capacity of 19 acre-feet and covers a surface area of 2.9 acres, serving the surrounding area with its critical flood control measures.
Despite its important role in mitigating flood risks, Kiltie is currently assessed to be in poor condition with a significant hazard potential. The dam features uncontrolled spillways and outlet gates, which pose a challenge for effective water management in times of heavy rainfall or flooding events. With a risk assessment rating of moderate, there is a need for improved risk management measures to ensure the safety and functionality of the dam for the local community and environment.
Given its location in a state-regulated area with permitting, inspection, and enforcement in place, Kiltie remains a key infrastructure for flood control in Norman County, Minnesota. As water resource and climate enthusiasts, it is crucial to monitor and support the maintenance and improvement of such vital structures to enhance resilience and preparedness for future water-related challenges in the region.
Year Completed |
1978 |
Dam Length |
440 |
Dam Height |
15 |
River Or Stream |
GARDEN SLOUGH |
Primary Dam Type |
Earth |
Surface Area |
2.9 |
Drainage Area |
0.72 |
Nid Storage |
19 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
15 |
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.
Kiltie