MarkWest Liberty Midstream & Resources has executed a long-term agreement with affiliates of Chesapeake Energy to provide additional natural gas midstream services for Chesapeake’s rich-gas Marcellus shale in northern West Virginia.

MarkWest Liberty will provide the midstream services at its Majorsville, West Virginia processing complex, which includes a 135 million cubic feet per day (mmcf/d) cryogenic gas processing plant that is operating near capacity.

MarkWest Liberty is nearing completion of a second 135mmcf/d cryogenic plant at Majorsville and is evaluating the addition of a third plant.

The natural gas liquids (NGLs) recovered at Majorsville are transported through pipeline to MarkWest Liberty’s fractionation, storage, and marketing complex in Houston, Pennsylvania.

By mid 2012, MarkWest Liberty will operate 745mmcf/d of cryogenic processing capacity serving Marcellus rich-gas producers in southwestern Pennsylvania and northern West Virginia from its Houston, Majorsville.

MarkWest Liberty Midstream & Resources is a partnership between MarkWest Energy Partners and the Energy & Minerals Group.