Jack Williams, also known as Fish Pond, is a privately owned water structure located in Las Animas, Colorado. Built in 1965 by the USDA NRCS, the dam serves multiple purposes including fire protection, stock, small fish pond, flood risk reduction, irrigation, and recreation. With a height of 20 feet and a storage capacity of 179 acre-feet, the dam sits on the Tejana Arroyo river and covers a surface area of 17 acres.

Despite being categorized as having a low hazard potential, Jack Williams is regulated and inspected by the Colorado Department of Water Resources. The dam has a hydraulic height of 21 feet and a structural height of 32 feet, with a maximum discharge capacity of 7200 cubic feet per second. Although it is not equipped with a spillway, the dam's spillway width is recorded at 112 feet. The dam's condition assessment is currently listed as "Not Rated" as the last inspection took place in February 1992.

Located in a picturesque setting with a rich history dating back to the mid-20th century, Jack Williams serves as an important water resource and recreational area in the region. With its diverse usage for both human and ecological needs, the dam stands as a testament to sustainable water management practices and the importance of maintaining critical infrastructure for the well-being of the community. As climate change continues to pose challenges to water resources, Jack Williams remains a vital asset in the fight against environmental risks and the preservation of water security in Colorado.