Larson Dam, located in Big Creek Reservoir, Iowa, is a privately-owned structure designed by J. Russell Hochstetler and completed in 2001. The dam serves multiple purposes including fire protection, stock maintenance, and as a small fish pond. It stands at a height of 33 feet and has a length of 680 feet, with a storage capacity of 239 acre-feet. The dam is primarily made of earth and sits on a soil foundation, with a spillway type classified as "Uncontrolled" and a low hazard potential.

Managed by the Iowa Department of Natural Resources, Larson Dam is state-regulated and undergoes inspections, permitting, and enforcement to ensure its safety and functionality. With a moderate risk assessment rating of 3, the dam is considered to have moderate risks associated with its operation. While the dam is not currently rated for its condition, it is monitored regularly for any potential issues. Overall, Larson Dam plays a crucial role in water resource management and climate resilience in the region, providing essential services for both human and natural ecosystems.