Ben is a privately owned earth dam located in Arvada, Wyoming, along the Arpan Draw. Built in 1960, Ben serves multiple purposes including fire protection, stock watering, and small fish pond maintenance. With a height of 29 feet and a length of 273 feet, the dam has a storage capacity of 52 acre-feet and a surface area of 3 acres.

Despite its low hazard potential, Ben is currently in poor condition according to a 2021 assessment. The dam has a hydraulic height of 24 feet and a spillway width of 40 feet, with no outlet gates. The last inspection in August 2021 revealed a need for maintenance and repairs to ensure the safety and functionality of the structure.

Located in a congressional district represented by Liz Cheney (R), Ben is regulated by the Wyoming State Engineer's Office and undergoes regular inspections. While the risk assessment deems it as moderate, the dam's condition assessment underscores the importance of ongoing monitoring and maintenance to mitigate potential risks and ensure the long-term resilience of this vital water resource.