Washington County Cons Bd Dam Reservoir Report

Last Updated: December 6, 2025

The Washington County Conservation Board Dam, located in Coppock, Iowa, serves the primary purpose of grade stabilization along the TR- Skunk River.


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Summary

Constructed in 2000 by the NRCS, this earth dam stands at a height of 29 feet and stretches 325 feet in length, with a storage capacity of 33 acre-feet. The dam is classified as having a low hazard potential and a moderate risk level, making it an essential structure for managing water resources in the area.

Despite not being regulated or inspected by state agencies, the Washington County Conservation Board Dam plays a crucial role in flood control and water management in the region. With a spillway type of uncontrolled and a surface area of 2 acres, this dam helps mitigate the risk of flooding and provides essential support for the surrounding ecosystem. The proximity of the dam to the Skunk River highlights its significance in preserving water quality and ensuring the stability of the local environment for both wildlife and residents.

As a key feature in the Rock Island District, the Washington County Conservation Board Dam contributes to the overall water infrastructure of the area, with its stone core and soil foundation enhancing its structural integrity. While currently not rated for condition assessment, this dam remains a vital asset for Washington County, demonstrating how local governments can effectively manage water resources and address climate-related challenges through strategic infrastructure development.

Year Completed

2000

Dam Length

325

Dam Height

29

River Or Stream

TR- SKUNK RIVER

Primary Dam Type

Earth

Surface Area

2

Drainage Area

0.03

Nid Storage

33

Hazard Potential

Low

Foundations

Soil

Nid Height

29
       
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.