Marak Dam, situated in Johnson County, Iowa, is a privately owned earth dam constructed in 1970 by the USDA NRCS. With a height of 30 feet and a length of 382 feet, the dam serves multiple purposes including fire protection, stock, small fish pond, and recreation. The dam has a storage capacity of 110 acre-feet, with a normal storage of 62 acre-feet, covering a surface area of 8.3 acres and draining an area of 0.42 square miles.

Located in the Coralville Reservoir area, Marak Dam is regulated by the Iowa Department of Natural Resources and is rated as having a low hazard potential. Despite not being rated for its condition assessment, the dam is regularly inspected, with state permitting, inspection, and enforcement in place to ensure its safety and functionality. The risk assessment for Marak Dam is moderate, with risk management measures in place to mitigate any potential issues. Overall, Marak Dam serves as a vital resource for water storage and management in the region, supporting various recreational activities while also providing essential services such as fire protection and stock maintenance.