Henderson Drain Detention, located in Laramie, Wyoming, is a state-owned earth dam designed by Leno Menghini in 1987 for flood risk reduction along the Henderson Drain tributary of Crow Creek. With a structural height of 10 feet and a length of 1250 feet, this detention structure has a storage capacity of 126 acre-feet and serves the primary purpose of flood risk reduction. The dam's spillway type is uncontrolled, with a width of 200 feet, and it features a single valve outlet gate.

Despite being classified as having a low hazard potential and fair condition assessment, Henderson Drain Detention is subject to regular state inspection, permitting, and enforcement to ensure its continued safety and functionality. The dam has a drainage area of 3 square miles and a maximum discharge capacity of 171 cubic feet per second. With a surface area of 26 acres and a normal storage capacity of 101 acre-feet, this detention structure plays a crucial role in mitigating flood risks in the region and protecting nearby communities like Cheyenne.

Water resource and climate enthusiasts will appreciate the strategic location and design elements of Henderson Drain Detention, which highlight the importance of proactive flood risk management. As part of the larger water infrastructure network in Wyoming, this earth dam serves as a vital piece in maintaining the safety and resilience of the region's water resources. With a moderate risk assessment rating and a history of regular inspections, Henderson Drain Detention stands as a testament to effective water resource management practices and the ongoing efforts to safeguard communities from potential flooding events.