West Douglas Watershed Site B-1 Reservoir Report

Last Updated: December 13, 2025

West Douglas Watershed Site B-1, located in Villisca, Iowa, is a local government-owned dam designed by USDA NRCS for fire protection, stock, and small fish pond purposes.


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Summary

Completed in 1968, this earth dam stands at 35 feet high and spans 564 feet in length, with a storage capacity of 116 acre-feet. The dam is regulated by the Iowa DNR and is inspected for compliance with state regulations.

With a low hazard potential and a moderate risk assessment rating, West Douglas Watershed Site B-1 plays a crucial role in flood risk reduction for the area. The dam, situated on the TR-Middle Nodaway river, covers a drainage area of 0.44 square miles and has a surface area of 6 acres. Despite not being currently rated for its condition, the dam serves as an essential structure for water resource management and climate resilience in Adams County, Iowa.

Managed by the Natural Resources Conservation Service, this dam is a key component in the region's water infrastructure, providing essential services while also contributing to environmental protection and sustainable development efforts. As climate change continues to impact water resources, sites like West Douglas Watershed Site B-1 demonstrate the importance of proactive management and maintenance to ensure the safety and resilience of our communities in the face of changing environmental conditions.

Year Completed

1968

Dam Length

564

Dam Height

35

River Or Stream

TR-MIDDLE NODAWAY

Primary Dam Type

Earth

Surface Area

6

Drainage Area

0.44

Nid Storage

116

Hazard Potential

Low

Foundations

Soil

Nid Height

35
       
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.