Linn Energy LLC agreed to acquire US Midcontinent oil and natural gas assets from Plains Exploration & Production Co. for $600 million. The acquisition will double Linn’s inventory of Granite Wash horizontal drilling sites in Texas and Oklahoma to more than 400.

Eagle Rock Energy Partners LP, Houston, will build a 125-MMcfd high-efficiency cryogenic processing plant in Wheeler County, Tex., in the Texas Panhandle’s Granite Wash natural gas play.

Eagle Rock Energy Partners LP, Houston, has amended its long-term NGL marketing agreement with Oneok Hydrocarbon LP to increase Oneok’s volume takeaway commitment from processing plants in the Texas Panhandle.

Parnon Gathering Inc., Tulsa, will lay 109 miles of 8-in. crude oil pipeline between Cherokee and Cushing, Okla.

Eagle Rock Energy Partners LP, Houston, will install a recently acquired 60-MMcfd cryogenic processing plant in Hemphill County, Tex., in the Granite Wash play of the Texas Panhandle.

MarkWest Energy Partners LP, Denver, plans to build a third plant at its Arapaho gas processing complex in western Oklahoma to handle production from the expanding Granite Wash play.

Forest Oil Corp. plans to sell 19.9% of its subsidiary, Lone Pine Resources Inc., in an initial public offering to be followed by a spinoff of Forest’s remaining shares in Lone Pine to Forest’s shareholders.

Unit Corp., Tulsa, is in final stages of completing a 50 MMcfd turboexpander gas processing plant in the northeastern Texas Panhandle, where it is stepping up horizontal drilling in the Granite Wash oil and gas play.

Plains All American Pipeline LP announced its Midcontinent Expansion Project, providing additional takeaway capacity for increased crude production in the Cleveland Sand, Granite Wash, and Colony Wash development areas.