Locke Lake Reservoir Report

Last Updated: December 5, 2025

Locke Lake, also known as Fridley Mill Pond, is a picturesque water resource located in Anoka, Minnesota.


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Summary

Managed by the local government, this recreational lake sits along the Rice Creek with a concrete dam that stands at 21 feet high and 100 feet long. Completed in 1956, Locke Lake offers a surface area of 23 acres and a storage capacity of 320 acre-feet, making it a popular spot for outdoor activities and water enthusiasts.

With a significant hazard potential due to its location and structure, Locke Lake is regularly inspected and maintained to ensure its integrity and safety. The dam's condition has been assessed as satisfactory, with the last inspection conducted in October 2014. Despite the very high risk assessment rating, the lake continues to be a beloved recreational spot in the area, drawing visitors for fishing, boating, and enjoying the natural beauty of the surrounding landscape.

Situated within the St. Paul District of the US Army Corps of Engineers, Locke Lake is a key destination for those interested in water resources and climate. Its controlled spillway, very high risk rating, and historical significance make it a valuable site for studying the intersection of human infrastructure and environmental conservation. As an essential part of the local ecosystem, Locke Lake serves as a reminder of the importance of responsible water management practices in the face of changing climate conditions.

Year Completed

1956

Dam Length

100

Dam Height

21

River Or Stream

RICE CREEK

Primary Dam Type

Concrete

Surface Area

23

Drainage Area

200

Nid Storage

320

Structural Height

25

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

25
       
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.