Davis Subwatershed M-3398 is a vital water resource located in Woodbury County, Iowa, with a primary purpose of fire protection, stock, or small fish pond. Managed by the local government and designed by USDA NRCS, this earth dam was completed in 1958 and has a height of 47 feet, providing a storage capacity of 71 acre-feet. With a drainage area of 0.37 square miles and a surface area of 2.4 acres, this dam plays a crucial role in flood risk reduction in the region.

The dam's low hazard potential and moderate risk assessment make it an important asset for water management in the area. While its condition has not been rated, state regulation, permitting, inspection, and enforcement ensure that it is maintained and operated effectively. The dam, situated on the TR-Cottonwood Hollow river or stream, serves as a key component in safeguarding the local environment and communities against potential water-related disasters.

Despite its uncontrolled spillway type, Davis Subwatershed M-3398 stands as a reliable structure for water storage and management, contributing to both environmental conservation and public safety in Woodbury County, Iowa. Its strategic location, efficient design, and state oversight make it a valuable resource for protecting against floods and ensuring sustainable water use in the region.