Mc Masters Subwatershed 3907 is a vital water resource located in Monona, Iowa, specifically in the city of TURIN. This subwatershed is regulated by the Iowa Department of Natural Resources and is designed by the USDA NRCS, highlighting the collaboration between local government and federal agencies to ensure proper management and protection of the water resource. The dam in Mc Masters Subwatershed 3907 serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction, making it a crucial element in the local ecosystem.

Constructed in 1955, the Earth-type dam in Mc Masters Subwatershed 3907 has a height of 42 feet and a storage capacity of 127 acre-feet. The dam covers a surface area of 5 acres and drains a watershed area of 0.77 square miles, providing essential water storage and flood control capabilities for the surrounding area. Despite its low hazard potential, the dam's risk assessment is rated as moderate, signaling the need for ongoing risk management measures to ensure the safety and integrity of the structure.

With its strategic location along the TR-LITTLE SIOUX RIVER, Mc Masters Subwatershed 3907 plays a crucial role in water management and conservation efforts in the region. Its association with the Natural Resources Conservation Service and other federal agencies underscores the importance of collaboration in maintaining sustainable water resources for future generations.