PXY-887 is a forested world, home to the Salish Indians and the alien Spirits who coexist with them. SG-1 visited the planet when a warning arrow was shot through the stargate after SG-11 failed to return from their mission. The planet has abundant valuable resources of raw trinium for which the SGC unsuccessfully tried to negotiate mining rights. The Spirits plan to bury their stargate to prevent further interference.
Episode Reference: Spirits