A Coaldale woman was sentenced to a federal prison term this week on drug charges.

Brianna Koschak, 22, was sentenced on Tuesday in U.S. District Court in Wilkes-Barre, to serve 16 months in prison.U.S. District Judge A. Richard Caputo also ruled that Koschak must serve three years of supervised release following the prison term and pay a special assessment of $100.Koschak pleaded guilty on April 18, 2011, to criminal conspiracy to distribute more than 50 grams of cocaine, crack cocaine, marijuana and methamphetamine.According to U.S. Attorney Peter J. Smith, a grand jury indicted Koschak and nine other people, including her sister, Beth Koschak, on Oct. 7, 2008.It was alleged that the 10 participated in the drug-trafficking ring starting in April 2008 and continuing until October.Authorities charged that the ring obtained drugs in New York and Schuylkill County and distributed them in the county.The ring also carried firearms to collect drug debts and used cell phones as part of the conspiracy.An investigation into the operation was conducted by the federal Drug Enforcement Administration and local police in the county.All 10 members of the conspiracy have pleaded guilty to various charges.Brianna Koschak is the seventh to be sentenced and received the same sentence as her sister.Assistant U.S. Attorney Francis P. Sempa, who prosecuted the case, said Zachary Guichard, of New York, the leader of the conspiracy, received the longest prison term of 72 months in prison.