Miller Subwatershed 3-A-1500 is a local government-owned dam located in Woodbury County, Iowa, near the city of Correctionville. Built in 1960 by the USDA SCS, this earth dam serves multiple purposes, including fire protection, stock watering, and flood risk reduction. With a height of 34 feet and a length of 250 feet, the dam has a storage capacity of 16 acre-feet and covers a surface area of 0.6 acres.

Situated on the TR-Little Sioux River, the dam is regulated by the Iowa Department of Natural Resources and is inspected regularly for safety and compliance. Despite being classified as having a low hazard potential, the dam is considered to have a moderate risk level due to its condition assessment being "not rated." The spillway type is uncontrolled, and the dam is designed to handle a maximum discharge of 0 cubic feet per second.

Overall, Miller Subwatershed 3-A-1500 plays a crucial role in managing water resources in the area, providing essential services for fire protection, agriculture, and flood control. As climate change continues to impact water availability and quality, it is essential to ensure the proper maintenance and management of such infrastructure to safeguard communities and the environment.