Jones Dam Reservoir Report
Nearby: Studer Dam Greogory Dam
Last Updated: December 14, 2025
Jones Dam, located in Taylor County, Iowa, was completed in 2002 and serves as a crucial resource for fish and wildlife conservation, grade stabilization, and water supply.
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Summary
The dam, designed by NRCS, is an earth-type structure with a height of 25 feet and a length of 330 feet, providing a storage capacity of 44 acre-feet. It is situated on a tributary to the East Fork river and falls under the regulatory jurisdiction of the Iowa Department of Natural Resources.
Despite being classified as having a low hazard potential, Jones Dam is subject to regular state inspections, permitting, and enforcement to ensure its continued safety and effectiveness. The spillway, with a width of 14 feet, is uncontrolled, allowing for a maximum discharge of 80 cubic feet per second. The risk assessment for the dam is moderate, with a rating of 3, highlighting the importance of ongoing risk management measures.
In the event of an emergency, the dam does not currently have an Emergency Action Plan (EAP) in place, and the condition assessment is listed as "Not Rated." With its location in a rural area, Jones Dam plays a vital role in supporting the local ecosystem and maintaining water resources for the surrounding community.
Year Completed |
2002 |
Dam Length |
330 |
Dam Height |
25 |
River Or Stream |
Trib to East Fork |
Primary Dam Type |
Earth |
Drainage Area |
0.18 |
Nid Storage |
44 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Jones Dam