We are excited about establishing a footprint in this world-class basin and beginning a strategic relationship with MarkWest. We look forward to working with MarkWest on this and future opportunities to expand this relationship and complement its industry leading position in the Marcellus and Utica." SMLP also announced today that its wholly-owned subsidiary, Summit Midstream Holdings, LLC, has exercised the $50 million accordion feature on its revolving credit facility to increase the capacity from $550 million to $600 million, effective June 4, 2013. The other terms of the revolving credit facility put in place on May 7, 2012 remain unchanged. The terms of the Bison drop down transaction were approved by the board of directors of SMLP's general partner and by the board's conflicts committee, which consists entirely of independent directors.