Jones Brothers Dam Reservoir Report

Last Updated: January 11, 2026

Jones Brothers Dam, located in Rome, Iowa, along the TR-Walnut Creek, was completed in 1965 by the USDA NRCS and serves multiple purposes, including fire protection, stock, small fish pond, recreation, and water supply.


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Summary

With a height of 24 feet and a length of 330 feet, the dam has a storage capacity of 62 acre-feet and covers a surface area of 4 acres. Despite its low hazard potential, the dam is regulated by the Iowa DNR and undergoes regular inspections to ensure its safety.

Owned privately, Jones Brothers Dam is situated in Jefferson County, Iowa, and is managed by the Natural Resources Conservation Service. The dam's primary purpose is to provide essential services like fire protection and water supply, while also offering recreational opportunities. With a moderate risk assessment score of 3, the dam is part of the Rock Island District and falls under the jurisdiction of the state of Iowa. Although its hazard potential is low, the dam's condition and safety are continuously monitored to mitigate any potential risks.

Jones Brothers Dam, constructed with soil foundations, features an uncontrolled spillway and an earth dam structure. It is a vital resource for the local community, providing water for various uses and maintaining a stable ecosystem along the TR-Walnut Creek. Despite being privately owned, the dam plays a crucial role in enhancing the region's resilience to climate change and ensuring the sustainable management of water resources in the area.

Year Completed

1965

Dam Length

330

Dam Height

24

River Or Stream

TR-WALNUT CREEK

Primary Dam Type

Earth

Surface Area

4

Drainage Area

0.28

Nid Storage

62

Hazard Potential

Low

Foundations

Soil

Nid Height

24
       
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.