Jar Farms Reservoir Report

Last Updated: December 13, 2025

Jar Farms is a privately owned earth dam located in Montgomery County, Iowa, near the city of TENVILLE.


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Summary

Built in 2001 by the Natural Resources Conservation Service (NRCS), this dam serves the primary purpose of grade stabilization along TR- FULTONS CREEK. With a height of 37 feet and a length of 320 feet, Jar Farms has a storage capacity of 29 acre-feet, providing a crucial water resource for the surrounding area.

Despite its low hazard potential and moderate risk assessment, Jar Farms has not been rated for its condition assessment. The dam features an uncontrolled spillway and is designed to handle a maximum discharge of 0 cubic feet per second. While the dam has not been modified over the years, it remains an essential infrastructure for water management in the region, covering a surface area of 5 acres and draining an area of 0.11 square miles.

For water resource and climate enthusiasts, Jar Farms represents a vital piece of infrastructure that contributes to the sustainable management of water resources in Iowa. As a key element in grade stabilization and flood control efforts, this earth dam plays a crucial role in protecting the surrounding area from potential water-related hazards. With its strategic location and design features, Jar Farms stands as a testament to the importance of responsible water resource management in the face of changing climate patterns.

Year Completed

2001

Dam Length

320

Dam Height

37

River Or Stream

TR- FULTONS CREEK

Primary Dam Type

Earth

Surface Area

5

Drainage Area

0.11

Nid Storage

29

Hazard Potential

Low

Foundations

Soil

Nid Height

37
       
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.