Dennis Gisvold Reservoir Report

Last Updated: December 6, 2025

Dennis Gisvold is a privately-owned earth dam located in Taylor, Wisconsin, along the Tr South Fork Yellow River.


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Summary

Designed by the USDA NRCS and completed in 1965, this recreational dam stands at a height of 12 feet with a length of 550 feet, providing storage of 100 acre-feet of water. With a low hazard potential and a moderate risk assessment rating of 3, this structure is currently in good condition with a 10-year inspection frequency.

Managed by the Natural Resources Conservation Service, Dennis Gisvold serves primarily for recreational purposes and is equipped with an uncontrolled spillway and outlet gates. While the dam itself has not undergone modifications in recent years, it remains a key feature in the local water resource management system. The dam's location within the Detroit District under the ownership of private individuals highlights its importance in flood control and water conservation efforts in the area.

Overall, Dennis Gisvold serves as a vital component in the water infrastructure of Taylor, Wisconsin, contributing to the overall water management and recreational activities in the region. Its design and construction by the USDA NRCS reflect a commitment to sustainable water resource practices, while its low hazard potential and moderate risk assessment underline the importance of regular maintenance and inspection to ensure its continued safety and efficiency. As a significant earth dam structure, Dennis Gisvold plays a crucial role in supporting the local ecosystem and enhancing water resilience in the face of changing climate conditions.

Year Completed

1965

Dam Length

550

Dam Height

12

River Or Stream

Tr South Fork Yellow

Primary Dam Type

Earth

Nid Storage

100

Outlet Gates

Uncontrolled

Hazard Potential

Low

Nid Height

12
       
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.