Little Turtle River Reservoir Report

Last Updated: December 5, 2025

Little Turtle River is a state-regulated water resource located in Iron, Wisconsin.


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Summary

This recreational dam, completed in 1972, stands at a height of 11 feet and spans 580 feet in length. With a storage capacity of 3,090 acre-feet and a surface area of 290 acres, this earth dam serves multiple purposes, including recreation and water storage for the surrounding area.

Despite its low hazard potential and fair condition assessment, the Little Turtle River dam poses a high risk due to its very high risk assessment rating. While it has undergone modifications in 2002, its emergency action plan and risk management measures are not clearly outlined in the available data. However, with state permitting, inspection, and enforcement in place, the dam is continuously monitored to ensure the safety of the community and the environment.

Located in a picturesque setting, the Little Turtle River dam offers a tranquil spot for water and climate enthusiasts to enjoy recreational activities while appreciating the importance of proper dam management and maintenance in preserving our natural resources. With its controlled spillway and state oversight, this dam serves as a valuable asset in the region's water resource management efforts.

Years Modified

2002 - Other

Year Completed

1972

Dam Length

580

Dam Height

11

River Or Stream

LITTLE TURTLE RIVER

Primary Dam Type

Earth

Surface Area

290

Hydraulic Height

3.9

Drainage Area

16.5

Nid Storage

3090

Structural Height

11

Hazard Potential

Low

Nid Height

11
       
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.