The document compares the potential savings from using Eco-Groomers at Mammoth Mountain and Vail Resorts compared to traditional snowcats. It estimates that Mammoth Mountain could save $787,400 annually and $3.94 million over 5 years by replacing 3 of its snowcats with Eco-Groomers. For Vail Resorts, the estimated annual savings are $3.4 million with total savings of $17.2 million over 5 years by replacing 20 of its snowcats with Eco-Groomers. The Eco-Groomer is a new snow grooming device that uses tillers and tracks to process snow more efficiently than traditional snowcats.