Wengler Wpa 2 Dam Reservoir Report

Last Updated: December 14, 2025

Wengler Wpa 2 Dam, located in Cavalier, North Dakota, is a federal-owned structure designed by Ducks Unlimited and managed by the Fish and Wildlife Service.


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Summary

Completed in 1995, this earth dam stands at a height of 7 feet and stretches 3503 feet long. With a primary purpose of providing fire protection and serving as a stock or small fish pond, the dam has a storage capacity of 402 acre-feet, with a normal storage level of 184 acre-feet.

Despite its low hazard potential, the dam's condition assessment is rated as poor, with the last inspection conducted in August 2015. The dam's risk assessment is considered moderate, with a risk level of 3. While there are no associated structures or outlet gates, the dam features an uncontrolled spillway with a width of 50 feet. The Fish and Wildlife Service is responsible for the construction, regulation, inspection, and operation of the dam, ensuring its compliance with state regulatory agencies.

Water resource and climate enthusiasts interested in the management and maintenance of dams will find Wengler Wpa 2 Dam to be an intriguing case study. With its unique design and purpose, as well as its location in the Omaha District of the USACE, this dam serves as a vital component of the local ecosystem, providing essential services such as fire protection and stock maintenance. Despite its poor condition assessment, efforts are likely underway to address any concerns and ensure the dam's continued functionality for the community it serves.

Year Completed

1995

Dam Length

3503

Dam Height

7

River Or Stream

Offstream

Primary Dam Type

Earth

Surface Area

65.9

Hydraulic Height

7

Drainage Area

30

Nid Storage

402

Structural Height

7

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

7
       
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.
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