Norelius Dam, located in Crawford County, Iowa, is a privately owned structure designed by the USDA NRCS and completed in 1997. This earth dam serves multiple purposes including fire protection, stock, and small fish pond, with a storage capacity of 88 acre-feet. Situated on TR- OTTER CREEK, the dam has a modest height of 27 feet and a length of 380 feet, covering a surface area of 4.5 acres with a drainage area of 0.74 square miles.

Despite its low hazard potential, Norelius Dam is regulated by the Iowa DNR and undergoes state permitting, inspection, and enforcement measures. The dam's spillway is uncontrolled, and it has not been rated for condition assessment. While the risk assessment categorizes it as moderate, with a DSAC assigned date yet to be determined, the dam's emergency action plan status and inundation maps preparation remain unclear. Overall, Norelius Dam serves as a crucial water resource for the surrounding area, providing essential benefits for fire protection, livestock, and aquatic life in a region prone to climate variability.