De Vries Damfountain Hills Plats 3 And 4 Dam Reservoir Report

Last Updated: December 13, 2025

The De Vries Dam in Pella, Iowa, also known as the Fountain Hills Plats 3 and 4 Dam, is a private earth dam designed by Garden and Associates for fire protection, stock, or small fish pond purposes.


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Summary

Completed in 2012, this dam has a height of 25 feet and a length of 375 feet, providing a storage capacity of 33 acre-feet with a normal storage of 22 acre-feet. Situated on TR-Thunder Creek in Marion County, Iowa, the dam serves as a low hazard potential structure with a spillway width of 16 feet.

Managed by the Iowa Department of Natural Resources, the De Vries Dam is regulated, inspected, and enforced by the state, ensuring its safety and compliance with regulations. With a surface area of 3 acres and draining a 0.04 square mile drainage area, the dam has a maximum discharge capacity of 10 cubic feet per second. Despite its "Not Rated" condition assessment, the dam continues to provide essential services and protection to the surrounding area, under the oversight of the state regulatory agency.

As a significant water resource in the region, the De Vries Dam plays a crucial role in providing fire protection and supporting local wildlife through its stock and small fish pond functions. With its strategic location and design, the dam stands as a testament to effective water management and conservation efforts in the state of Iowa.

Year Completed

2012

Dam Length

375

Dam Height

25

River Or Stream

TR-Thunder Creek

Primary Dam Type

Earth

Surface Area

3

Drainage Area

0.04

Nid Storage

33

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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.