Helen is a privately owned earthen dam located in Converse, Wyoming, along Co. Rd. 43. Completed in 1966, this structure serves the primary purpose of flood risk reduction and has a height of 22 feet with a hydraulic height of 16 feet. The dam holds a total storage capacity of 83 acre-feet, with a normal storage level of 41 acre-feet and a surface area of 7 acres.

The dam is situated on Little Ltng. Creek, a tributary of Lance, and is regulated by the State of Wyoming, with state permitting, inspection, and enforcement in place. Helen has a low hazard potential and is currently assessed to be in fair condition as of the last inspection in May 2018. The spillway type is uncontrolled, with a width of 50 feet, and there is one other controlled outlet gate. While the risk assessment for Helen is moderate, measures for risk management and emergency preparedness are not specified in the available data.