Madison County Roadgrade Dam 14-76-26 Reservoir Report

Last Updated: December 10, 2025

Madison County Roadgrade Dam 14-76-26, located in Carlisle, Iowa, serves multiple purposes including fire protection and creating a small fish pond.


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Summary

Constructed in 1996, this earth dam stands at a height of 44 feet and has a length of 535 feet, providing a storage capacity of 90 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its safety and compliance with state regulations.

Situated on the TR- North River, Madison County Roadgrade Dam 14-76-26 has a low hazard potential and is classified as being in moderate risk. The dam's spillway type is uncontrolled, with a surface area of 4.1 acres and a drainage area of 0.12 square miles. Despite not being rated for its condition assessment, the dam is equipped with emergency action plans and emergency contacts to manage any unforeseen events. With its strategic location and significant storage capacity, this dam plays a crucial role in water resource management and climate resilience efforts in the region.

Managed by the local government, Madison County Roadgrade Dam 14-76-26 stands as a vital infrastructure for the community, providing essential services for fire protection and recreational activities. With its earth structure and soil foundation, the dam represents a key asset in the region's water management system. As climate change continues to pose challenges to water resources, this dam serves as a critical component in safeguarding against flooding and ensuring water availability for various uses.

Year Completed

1996

Dam Length

535

Dam Height

44

River Or Stream

TR- NORTH RIVER

Primary Dam Type

Earth

Surface Area

4.1

Drainage Area

0.12

Nid Storage

90

Hazard Potential

Low

Foundations

Soil

Nid Height

44
       
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.