Gannon Dam, located in Jasper County, Iowa, was completed in 1970 by the USDA NRCS and serves multiple purposes including fire protection, stock, and small fish pond management. This earth dam stands at a height of 20 feet and has a length of 387 feet, providing a storage capacity of 60 acre-feet. Situated on TR-Indian Creek, the dam is regulated by the Iowa Department of Natural Resources and is subject to regular inspections, enforcement, and permitting to ensure its safety and functionality.

Despite its low hazard potential, Gannon Dam is considered to have moderate risk due to its location and design. The dam has not been rated for its condition, but its emergency action plan status and risk management measures remain unclear. With a surface area of 4.2 acres and a drainage area of 0.33 square miles, the dam plays a crucial role in water resource management in the area. Although it has not been modified in recent years, ongoing monitoring and maintenance are essential to mitigate potential risks and ensure the safety of the surrounding community and environment.