The alleged incident involved the Roosevelt High School baseball team from Johnstown during a preseason tournament trip to Delta on March 1.
Freshman players reported that upperclassmen restrained them in the team's hotel rooms and rubbed their genitals on their faces.
Several Roosevelt students indicated this was a yearly ritual for members of the baseball team.
Six students received a week-long suspension and three of those students were later expelled for the remainder of the 2007-2008 school year.
The Colorado Bureau of Investigation (CBI) recently turned over results of a five-month investigation to the Delta County District Attorney's office.
Because the teenagers' cases are being handled in juvenile court, exact details on charges and those accused are sealed by law.
Delta County District Attorney Myrl Serra said the charges are not felonies but said he could not comment further.
Several of the teens are expected in Delta District Court for a closed-door hearing later this month.
"I'm glad they're taking this seriously," said Jenn Baucum, the mother of one alleged victim. "This wasn't funny and it wasn't a joke."
The Delta County District Attorney's Office said negotiations related to the case are ongoing.
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