Island Lake Wpa Reservoir Report

Last Updated: December 5, 2025

Island Lake Wpa in Morris, Minnesota, is a Federal-owned Fish and Wildlife Pond managed by Ducks Unlimited.


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Summary

Completed in 1990, this Earth dam structure stands at 16 feet high and spans 290 feet in length, with a storage capacity of 700 acre-feet. Situated on the Pomme de Terre River, this low hazard dam serves as a crucial resource for waterfowl and wildlife conservation in the area.

Despite its low hazard potential, Island Lake Wpa is classified as having a very high risk due to its location and surrounding environment. While the dam itself is in good condition and has not been recently inspected, its emergency action plan and preparedness measures remain unclear. With a drainage area of 3 square miles and a maximum discharge of 160 cubic feet per second, this dam plays a significant role in water resource management in the region.

Although the dam's condition assessment is marked as "Not Rated," its strategic location and purpose as a wildlife sanctuary make it a vital asset for climate and water resource enthusiasts. As efforts continue to maintain and monitor this structure, Island Lake Wpa stands as a testament to the importance of sustainable water management practices in safeguarding our natural ecosystems.

Year Completed

1990

Dam Length

290

Dam Height

12

River Or Stream

POMME DE TERRE RIVER-TR

Primary Dam Type

Earth

Surface Area

100

Drainage Area

3

Nid Storage

700

Structural Height

16

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

16
       
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.