Dykes Dam Reservoir Report

Last Updated: December 6, 2025

Dykes Dam, located in Floris, Iowa, is a privately owned earth dam designed by USDA NRCS and completed in 2010 for the primary purpose of grade stabilization.


°F

°F

mph

Wind

%

Humidity

Summary

With a height of 27 feet and a length of 323 feet, this dam has a storage capacity of 63 acre-feet and serves to regulate the flow of a tributary to Soap Creek. Situated in Davis County, Iowa, Dykes Dam is regulated by the Iowa Department of Natural Resources and is subject to state permitting, inspection, and enforcement.

The dam's hazard potential is rated as low, and its condition has not been assessed. Despite not having a formal Emergency Action Plan (EAP) or updated emergency contacts, Dykes Dam provides essential flood control and water resource management benefits to the surrounding area. With a spillway width of 14 feet and a surface area of 4.4 acres, this structure plays a crucial role in maintaining the stability of the local watershed and protecting downstream communities from potential flooding events.

While Dykes Dam does not fall under the jurisdiction of the US Army Corps of Engineers, it is a vital infrastructure asset for the region. As a key component in the management of water resources and climate resilience efforts, this dam reflects the collaborative efforts of private owners, regulatory agencies, and designers to ensure the safety and sustainability of the surrounding environment. Dykes Dam stands as a testament to the importance of effective dam management in safeguarding communities and natural ecosystems against the impacts of changing climate conditions.

Year Completed

2010

Dam Length

323

Dam Height

27

River Or Stream

Trib to Soap Creek

Primary Dam Type

Earth

Surface Area

4.4

Drainage Area

0.25

Nid Storage

63

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

27
       
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.