MarkWest expects to invest approximately $50 million in 2008 and anticipates investing up to an additional $125 million in 2009, based on projects currently being developed.

John Pinkerton, chairman and CEO of Range Resources, said: We are very pleased to announce this arrangement with MarkWest Energy Partners. Range has well over one million net acres in the Marcellus play. Having the pipeline and processing infrastructure in place will be important for us to develop the reserve potential of the play.