Spence Dam, located in Carlisle, Iowa, is a privately owned structure designed by NRCS with a primary purpose of fire protection, stock, or small fish pond. Completed in 2003, this earth dam stands at a height of 32 feet and spans a length of 460 feet, with a storage capacity of 127 acre-feet. Situated on TR- North River, the dam serves as a vital resource for water management and conservation in Warren County.

Despite its low hazard potential and moderate risk assessment, Spence Dam is regulated and inspected by the Iowa DNR to ensure its safety and functionality. With a surface area of 7.7 acres and a drainage area of 0.5 square miles, the dam plays a crucial role in flood control and water supply management for the surrounding area. While it lacks certain features like outlet gates and a spillway, the dam continues to serve its intended purposes effectively.

Water resource and climate enthusiasts will appreciate the significance of Spence Dam in sustaining local ecosystems and providing essential resources for the community. As a key infrastructure for water storage and management, the dam contributes to the overall resilience of the region against droughts and floods. With its strategic location and design, Spence Dam stands as a testament to the importance of sustainable water resource management in Iowa.