Huff Subwatershed Sta 77+72 #1 is a local government-owned structure located in Castana, Iowa, designed by USDA NRCS. This earth dam, completed in 1963, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a maximum storage capacity of 152 acre-feet and a normal storage capacity of 106 acre-feet, this dam plays a crucial role in water resource management in the area.

Situated on the TR-MAPLE RIVER, this dam has a low hazard potential and is not currently rated for condition assessment. Despite its moderate risk level, the structure has not been modified in recent years and lacks certain emergency preparedness measures such as an Emergency Action Plan (EAP). As part of the Iowa Department of Natural Resources' state-regulated network, this dam undergoes state permitting, inspection, and enforcement processes to ensure public safety and environmental compliance.

The Huff Subwatershed Sta 77+72 #1 serves as a key feature in the local water infrastructure, providing essential services for fire protection, agriculture, and flood mitigation. As climate change continues to impact water resources, structures like this earth dam play a vital role in managing water levels and protecting communities from potential risks. With its strategic location and multi-purpose design, this dam exemplifies the importance of sustainable water resource management in the face of evolving environmental challenges.