Fish Lake Reservoir Report
Nearby: Herwig Pond Albert Lake
Last Updated: December 5, 2025
Fish Lake, located in Kanabec, Minnesota, is a gravity dam constructed in 1930 with a primary purpose of "Other." The dam stands at a height of 10 feet, with a hydraulic height of 4.5 feet and a structural height of 13 feet.
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Summary
With a length of 1200 feet, Fish Lake has a storage capacity of 3663 acre-feet and a normal storage capacity of 2442 acre-feet. The dam's surface area covers 440 acres and its drainage area spans 87 square miles.
The dam's spillway, an uncontrolled type, is 40 feet wide, and the hazard potential is rated as low with a fair condition assessment. The last inspection was conducted in September 2015, with a frequency of once every 8 years. Fish Lake poses a moderate risk level (3) according to the risk assessment, and emergency action protocols are yet to be prepared. The dam is under state jurisdiction and regulation by the Minnesota Department of Natural Resources (MNDNR EWR), ensuring compliance with permitting, inspection, and enforcement measures. Fish Lake serves as a vital water resource in the region, providing essential environmental and recreational benefits for the local community.
Year Completed |
1930 |
Dam Length |
1200 |
Dam Height |
10 |
River Or Stream |
ANN RIVER |
Primary Dam Type |
Gravity |
Surface Area |
440 |
Hydraulic Height |
4.5 |
Drainage Area |
87 |
Nid Storage |
3663 |
Structural Height |
13 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Snake River Near Pine City
|
127cfs |
Kettle River Below Sandstone
|
170cfs |
Rum River Near St. Francis
|
209cfs |
Elk River Near Big Lake
|
274cfs |
St. Croix River At St. Croix Falls
|
1470cfs |
Mississippi River At Anoka
|
2940cfs |
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.
Fish Lake