Located in Monona, Iowa, the Mc Call Subwatershed M-17070 is a local government-owned structure designed by USDA NRCS with a primary purpose of fire protection, stock, or small fish pond. Completed in 1965, this earth dam stands at a height of 23 feet and has a storage capacity of 58 acre-feet. It serves multiple purposes including flood risk reduction and covers a drainage area of 3.33 square miles along the TR- Little Sioux River.

With a low hazard potential and a moderate risk assessment rating, the Mc Call Subwatershed M-17070 is regulated by the Iowa DNR and undergoes state permitting, inspection, and enforcement. Classified as a small structure, it plays a crucial role in managing water resources in the region and contributes to the overall environmental sustainability. Enthusiasts of water resources and climate will appreciate the significance of this structure in maintaining ecological balance and mitigating potential risks in the area.