BILLINGS, Mont. (AP) — An electricity co-op will continue its fight to cut ties with a bankrupt wholesale supplier after a federal judge ruled Beartooth Electric Cooperative had proven enough to proceed with two claims against Southern Montana Electric Generation and Transmission Cooperative.

U.S. Bankruptcy Judge Ralph Kirscher’s Dec. 20 order allows the Red Lodge-based co-op, Beartooth, to pursue its legal challenge that its contract with Southern is invalid.