Guidera Reservoir Report

Last Updated: December 6, 2025

Guidera is a dam located in Polk, Wisconsin, that serves as a tributary to Bone Lake.


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Summary

This private-owned structure stands at a height of 20 feet with a hydraulic height of 18 feet, providing a storage capacity of 168 acre-feet. With a low hazard potential and fair condition assessment, Guidera has been regulated, inspected, and permitted by the Wisconsin Department of Natural Resources to ensure its safety and compliance.

Despite being uncontrolled, Guidera's spillway boasts a width of 56 feet to handle a maximum discharge of 112 cubic feet per second. The dam, completed at an unknown date, spans a length of 250 feet and covers a drainage area of 0.5 square miles. With its last inspection in November 2020 and a moderate risk assessment score of 3, Guidera is equipped with emergency action plans to manage potential risks and ensure the safety of surrounding communities in case of a breach.

Enthusiasts of water resources and climate will find Guidera's data intriguing, showcasing its vital role in water management and the delicate balance between human intervention and natural forces. As a regulated structure with a moderate risk level, Guidera exemplifies the importance of maintaining and monitoring dams to protect both the environment and public safety in the face of changing climate conditions.

Dam Length

250

Dam Height

20

River Or Stream

Tributary to Bone Lake

Hydraulic Height

18

Drainage Area

0.5

Nid Storage

168

Structural Height

20

Hazard Potential

Low

Nid Height

20
       
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.