Swan Lake Reservoir Report

Last Updated: December 6, 2025

Swan Lake, located in Nicollet, Minnesota, is a state-regulated water resource managed by the Minnesota Department of Natural Resources, Environmental Water Resources division.


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Summary

Built in 1977, this dam serves as a vital component of the local watershed system, with a primary purpose listed as "Other". The dam's design features a buttress core type and stands at a height of 8 feet, with a hydraulic height of 6.6 feet.

With a storage capacity of 56,076 acre-feet and a surface area of 9,346 acres, Swan Lake plays a crucial role in managing water resources in the region. The dam's low hazard potential and satisfactory condition assessment make it a reliable infrastructure for water supply and flood control. The last inspection conducted in April 2014 deemed the structure to be in good standing, with inspection frequency set at every 8 years.

Water and climate enthusiasts can appreciate Swan Lake as a key element in sustainable water management in Minnesota. Its presence on Nicollet Creek and its role in the local watershed system highlight the importance of well-maintained infrastructure in addressing water resource challenges. The dam's capacity, design, and regulatory oversight by the state showcase a commitment to maintaining the integrity of this essential water resource for years to come.

Year Completed

1977

Dam Length

54

Dam Height

8

River Or Stream

NICOLLET CREEK

Primary Dam Type

Other

Surface Area

9346

Hydraulic Height

6.6

Drainage Area

42.3

Nid Storage

56076

Structural Height

7

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

8
       
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.