Hoikka Reservoir Report

Last Updated: December 6, 2025

Hoikka, John G.


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Summary

is a privately owned earth dam located in Pierce, Wisconsin, with a primary purpose of fire protection, stock, or small fish pond. Built in 1973 by the USDA NRCS, this dam stands at a height of 28 feet and has a length of 324 feet. With a storage capacity of 26 acre-feet and a drainage area of 0.2 square miles, Hoikka, John G. plays a crucial role in managing water resources in the area.

Despite being classified as having a low hazard potential and fair condition assessment, Hoikka, John G. is subject to state regulations and inspections by the Wisconsin Department of Natural Resources (WIDNR). The dam's spillway type is uncontrolled, and it has a maximum discharge capacity of 77 cubic feet per second. With a moderate risk assessment rating, measures for risk management and emergency response may be necessary to ensure the safety and integrity of this structure in the future.

Overall, Hoikka, John G. serves as an important asset for fire protection and water storage in the region, with its construction and maintenance overseen by the Natural Resources Conservation Service. As an earth dam located on an unnamed tributary, its impact on the local hydrology and environment underscores the need for continued monitoring and management to address any potential risks and ensure the sustainable use of water resources in the area.

Year Completed

1973

Dam Length

324

Dam Height

28

River Or Stream

Unnamed Tributary

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

28

Drainage Area

0.2

Nid Storage

26

Structural Height

28

Hazard Potential

Low

Nid Height

28
       
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.