Hill is a privately owned irrigation dam located in Weld County, Colorado, near the city of Milliken. Completed in 1920, this earth dam on the Little Thompson River serves the primary purpose of irrigation and water supply. With a height of 5 feet and a storage capacity of 287 acre-feet, Hill Dam plays a crucial role in managing water resources in the area.

Despite its low hazard potential and satisfactory condition assessment, Hill Dam is classified as having a high risk level due to its location and potential impact on the surrounding area. The dam has undergone regular inspections, with the last one conducted in August 2013. The state of Colorado regulates and inspects the dam, ensuring that it meets necessary safety standards for continued operation.

Located within the jurisdiction of the Colorado Division of Water Resources, Hill Dam serves as a vital infrastructure for water management in the region. Its historical significance and ongoing role in irrigation make it a noteworthy structure for water resource and climate enthusiasts to study and appreciate.