Crow Wing 8th Lake Reservoir Report

Last Updated: December 5, 2025

Crow Wing 8th Lake, located in Nimrod, Minnesota, is a state-owned dam on the Crow Wing River with a primary purpose classified as "Other." Built in 1938, this gravity dam stands at a height of 8 feet and has a structural height of 9 feet, serving to store water for various purposes.


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Summary

With a normal storage capacity of 21,033 acre-feet and a maximum storage of 26,000 acre-feet, this dam plays a crucial role in managing water resources in the area.

Managed by the Minnesota Department of Natural Resources, the Crow Wing 8th Lake dam has been deemed to have a low hazard potential and is reported to be in satisfactory condition as of the last assessment in 2009. The dam is inspected every 8 years to ensure its continued safety and functionality. The surrounding area boasts a drainage area of 39.2 square miles, with a maximum discharge capacity of 560 cubic feet per second, highlighting the importance of this structure in regulating water flow and levels in the region.

Overall, Crow Wing 8th Lake serves as a vital component in water resource management and climate resilience efforts in Hubbard County, Minnesota. With its strategic location on the Crow Wing River and its role in storing and regulating water, this dam contributes to environmental sustainability and flood control measures in the area. Its satisfactory condition and regular inspections ensure its continued effectiveness in serving the community and protecting the surrounding ecosystem.

Year Completed

1938

Dam Length

48

Dam Height

8

River Or Stream

CROW WING RIVER

Primary Dam Type

Gravity

Hydraulic Height

1.9

Drainage Area

39.2

Nid Storage

26000

Structural Height

9

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

9
       
Seasonal Comparison

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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.