Located in Weld County, Colorado, Charles Wilson Detention Dam #1, also known as Wilson Detention #1, was completed in 1964 with the primary purpose of flood risk reduction. This private earth dam stands at a height of 18 feet with a hydraulic height matching that measurement. The dam's structure stretches 401 feet in length and boasts a maximum storage capacity of 55 acre-feet, primarily serving the purpose of flood risk reduction and irrigation within the area.

With a low hazard potential and a moderate risk assessment rating, Charles Wilson Detention Dam #1 is regulated and inspected by the Colorado Department of Water Resources. The dam, situated along the Little Thompson River, operates under the oversight of the state regulatory agency for permitting, inspection, and enforcement. Despite its age, the dam's condition is currently listed as "Not Rated," with the last inspection conducted in April 2001 on a biennial basis, ensuring the safety and functionality of this crucial water management structure.

This uncontrolled spillway dam provides essential flood control measures for Milliken residents, offering protection against potential inundation events. With a moderate risk profile and a history of effective flood mitigation, Charles Wilson Detention Dam #1 stands as a vital component of the water resource infrastructure in Colorado, serving both practical and environmental purposes in the region.