SNOFLO



CARLSON DAM

RESERVOIR LEVELS
Soil Dam Tr-Jordan Creek
April 15, 2025


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Carlson Dam, located in Monona, Iowa, was completed in 1971 and serves multiple purposes, including fire protection and providing water for stock or small fish ponds. Owned privately, the dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections and enforcement to ensure its safety and compliance with state regulations. The dam, primarily constructed of earth and soil foundations, stands at a height of 27 feet with a length of 460 feet, holding a maximum storage capacity of 122 acre-feet.

Situated on the TR-Jordan Creek, Carlson Dam has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. Despite its moderate risk level, the dam has not been modified in recent years and lacks detailed emergency action plans. With a surface area of 3.5 acres and a drainage area of 1.48 square miles, the dam plays a crucial role in water resource management in the region. While it does not feature outlet gates or locks, the dam is equipped with an uncontrolled spillway to manage excess water flow.

Water resource and climate enthusiasts interested in the Carlson Dam will find it to be a vital structure in the local ecosystem, providing essential services for both fire protection and agricultural needs. With its location in Monona, Iowa, the dam offers a glimpse into the intersection of human infrastructure and natural resources management. While maintaining a low hazard potential, the dam's risk assessment suggests a need for updated emergency preparedness measures to ensure the safety of surrounding communities and the sustainability of the dam's operations in the face of potential climate challenges.

Year_Completed 1971
Dam_Height 27
River_Or_Stream TR-JORDAN CREEK
Dam_Length 460
Primary_Dam_Type Earth
Surface_Area 3.5
Drainage_Area 1.48
Nid_Storage 122
Hazard_Potential Low
Foundations Soil
Nid_Height 27
       

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