The Winona County Sheriff's Department says a 54-year-old Witoka area man was jailed early today (Wednesday) on preliminary charges of sexual assault. Investigator Kraig Glover identified the man as Gaylin Lynn Eide. Glover said a 56-year-old Witoka woman awoke in her home about 1:00 a.m. to a man on top of her. The incident was reported to the sheriff's department about 4:00 a.m. Glover said Eide is facing preliminary charges of foruth degree criminal sexual conduct and first degree burglary. The case is being reviewed by the county attorney's office for possible formal charges.