Wyo. Stat. Ann. § 34-27-107

Unless otherwise agreed between the surface owner and wind energy developer, all easement interests acquired after April 1, 2011 for the purpose of producing wind energy shall revert to the owner of the surface estate if wind energy production has ceased for a continuous period of ten (10) years or if the generation of electricity by a turbine has not commenced within twenty (20) years after the execution of a wind energy agreement. Reversion of an interest under this section does not transfer any obligation to restore or reclaim the surface estate.