Located in Marshalltown, Iowa, the South 6th St Stormwater Detention Basin is a vital structure designed by VEENSTRA & KIMM to assist in flood risk reduction along Anson Creek. Completed in 1997, this earth dam stands at a height of 9 feet and spans a length of 220 feet, with a capacity to store 69 acre-feet of water. With a primary purpose of flood risk reduction, this basin plays a crucial role in managing stormwater during heavy rainfall events.

Owned and regulated by the local government, the South 6th St Stormwater Detention Basin is under the jurisdiction of the Iowa Department of Natural Resources. Despite its low hazard potential and moderate risk assessment, the structure has not been rated for its condition assessment. However, it serves as a key asset in protecting the surrounding area from potential flooding, with a normal storage capacity of 32 acre-feet and a surface area of 4.3 acres.

With its uncontrolled spillway type and location in a designated flood risk area, the South 6th St Stormwater Detention Basin stands as a critical infrastructure for water resource and climate enthusiasts. As a key component in the flood risk reduction strategy for Marshalltown, this earth dam plays a crucial role in managing stormwater flow and protecting the community from potential flood events along Anson Creek.