The NoMol trap, a design used for more than 100 years, is a simple, economical tool to control moles, the company says — noting that it’s pesticide-free, environmentally sound, and effective. An average-sized suburban yard with damage typically has one to three moles. Moles can dig tunnels at approximately 18 feet an hour, depending on soil conditions. Young are born and within three weeks they start feeding on their own. Thus, early trapping is critical to success.