Merrill Trust Dam, located in Comanche, Kansas, is a privately owned earth dam that was completed in 1970. Standing at a height of 20 feet, the dam serves the primary purpose of water storage with a capacity of 80 acre-feet. The dam is situated on the Indian Creek-TR river and is under the jurisdiction of the Kansas City District.

Despite being classified as having a low hazard potential, Merrill Trust Dam has not been rated for its condition assessment as of the last inspection in July 2009. The dam does not have a spillway or outlet gates, and there are no associated structures or locks. The risk assessment, emergency action plan, and inundation maps for the dam have not been updated or prepared, indicating a lack of comprehensive risk management measures in place.

Water resource and climate enthusiasts interested in the Merrill Trust Dam may find its unique design as an earth dam with buttress core types intriguing. The dam's location in Alva, Oklahoma, and its proximity to the Indian Creek-TR river make it a significant feature in the local landscape. The dam's history, construction details, and its role in water storage in the area provide valuable insights into the intersection of infrastructure and environmental conservation.