Simpson Creek Watershed Site 1, located in Fremont, Iowa, is a vital water resource managed by the local government with design input from the USDA NRCS. This site plays a crucial role in fire protection, stock, and small fish pond purposes, as well as flood risk reduction. The earth dam, completed in 1958, stands at a height of 46 feet and spans a length of 872 feet, with a storage capacity of 400 acre-feet and a drainage area of 1.38 square miles.

Despite being classified as having a low hazard potential, Simpson Creek Watershed Site 1 is under the regulation of the Iowa DNR, with state permitting, inspection, and enforcement processes in place. The dam's condition is currently not rated, but a moderate risk assessment of 3 has been assigned. With an emphasis on emergency preparedness, the site's emergency action plan and risk management measures are yet to be fully evaluated. This data-rich profile of Simpson Creek Watershed Site 1 highlights its importance in water resource management and climate resilience efforts within the region.