Madsen Dam, located in Marshall County, Iowa, was completed in 1978 by the USDA NRCS and serves multiple purposes including fire protection, stock watering, small fish pond, and recreation. The dam stands at a height of 34 feet and has a storage capacity of 94 acre-feet, with a normal storage level of 59 acre-feet. The dam covers a surface area of 6.7 acres and is primarily regulated by the Iowa Department of Natural Resources.

Situated on the TR-Snipe Creek, Madsen Dam is designed as an earth dam with a soil foundation. It has an uncontrolled spillway type and a low hazard potential, with a moderate risk assessment rating. Despite not receiving a condition assessment rating, the dam is deemed to be in a satisfactory condition. Although there are no associated structures or inspection data available, Madsen Dam remains an important water resource for the local community, providing essential water management and recreational opportunities.

Owned privately, Madsen Dam is a vital asset for water resource and climate enthusiasts in the area. With its multiple purposes and moderate risk assessment rating, the dam serves as a key element in the local water infrastructure, ensuring water availability for fire protection, stock watering, and recreational activities. Its location in Kellogg, Iowa, makes it a significant feature in the region's water management and conservation efforts.