The Walling Subwatershed Sta 18+50 #1j is a local government-owned earth dam in Woodbury County, Iowa, designed by the USDA NRCS and completed in 1953. This dam serves multiple purposes, including fire protection, stock watering, and small fish pond creation, as well as flood risk reduction for the surrounding area. With a maximum storage capacity of 48 acre-feet and a normal storage capacity of 28 acre-feet, this dam plays a crucial role in managing water resources in the region.

Located in Oto, Iowa, along the TR-Little Sioux River, the Walling Subwatershed Sta 18+50 #1j dam has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. While the dam has not undergone recent inspections or maintenance, it is regulated by the Iowa DNR and falls under state jurisdiction for permitting, inspection, and enforcement. The risk assessment for this dam is moderate, highlighting the need for continued monitoring and potential risk management measures to ensure its safety and functionality for both water resource management and flood control purposes.

Despite its age and lack of recent assessments, the Walling Subwatershed Sta 18+50 #1j dam remains a key infrastructure for water resource management in the area. As climate change continues to impact water availability and flood risks, the importance of maintaining and potentially upgrading this dam to meet current safety standards and operational needs becomes increasingly apparent. Water resource and climate enthusiasts should keep an eye on developments surrounding this dam to ensure its continued effectiveness in protecting the local community and environment.