Bacon Creek Watershed Site L-1 in Plymouth County, Iowa, is a flood risk reduction structure designed by the USDA NRCS and completed in 1976. This earth dam, standing at a height of 53 feet and a length of 322 feet, serves the primary purpose of flood risk reduction along the TR-Floyd River. With a storage capacity of 49 acre-feet and a drainage area of 0.27 square miles, this low-hazard potential structure plays a crucial role in protecting the surrounding area from potential flooding events.

Managed by the local government and regulated by the Iowa Department of Natural Resources, Bacon Creek Watershed Site L-1 is equipped with an uncontrolled spillway and has a surface area of 3 acres. Despite its moderate risk assessment rating, the dam is not currently rated for its condition and does not have an emergency action plan prepared. The structure has not been modified since its completion and does not have any associated locks or outlet gates. As a key component of the flood risk reduction infrastructure in the area, this site plays a vital role in mitigating the impacts of potential flooding events along the TR-Floyd River.

Located near Sioux City, Bacon Creek Watershed Site L-1 is situated in a strategic position to provide fire protection, stock watering, and small fish pond benefits in addition to its primary flood risk reduction function. With its historic completion in 1976 by the Natural Resources Conservation Service, this structure continues to serve the community by managing water resources and contributing to climate resilience in the region.