Nichols Dam, located in Warren County, Iowa, serves multiple purposes including fire protection, stock, and a small fish pond. The dam, completed in 1992, is primarily an earth dam with a height of 28 feet and a length of 440 feet. It has a storage capacity of 46 acre-feet and covers a surface area of 3.1 acres. The dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections, with a low hazard potential rating and a moderate risk assessment.

Situated on TR-Deer Creek, Nichols Dam plays a vital role in water resource management in the region. Its location in Carlisle, Iowa, makes it a key asset for the community in terms of water supply, irrigation, and recreational activities. Despite being a private-owned structure, the dam is subject to state regulations and inspections to ensure its safety and functionality in mitigating flood risks and providing essential water resources for various uses.

With its controlled spillway and soil foundation, Nichols Dam continues to contribute to the sustainable management of water resources in the area. While it has not been rated for its condition assessment, the dam is considered to be in moderate risk with appropriate risk management measures in place. Enthusiasts of water resources and climate will find the design and operational details of Nichols Dam intriguing, as it represents a critical infrastructure for both human and environmental needs in the region.