Spencer Dam, located in Westphalia, Kansas, is a privately owned earth dam with a primary purpose of fire protection, stock, and small fish pond. Built in 1993 by designer B.F. Spencer, the dam stands at a height of 24.5 feet and has a storage capacity of 243.6 acre-feet. Despite its low hazard potential, the dam serves as an important resource for irrigation and water management in the area.

The dam spans 1200 feet in length and has a surface area of 18 acres, with a drainage area of 0.2 square miles. The structure is regulated and inspected by the Kansas Department of Agriculture, ensuring its safety and compliance with state guidelines. With a maximum discharge capacity of 600 cubic feet per second, the dam plays a crucial role in managing water flow in Thomas Creek-TR, a vital river/stream in the region.

Although the dam's condition assessment is currently rated as "Not Rated" and its emergency action plan status is unclear, Spencer Dam remains a key infrastructure for water resource management and climate resilience in Anderson County, Kansas. Its strategic location and design make it a valuable asset for fire protection, agriculture, and environmental conservation in the region.