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Constellation Energy, parent of Baltimore Gas and Electric Co., Monday said it had reached an agreement with Toyota Motor Engineering & Manufacturing, North America Inc. to provide an array of integrated natural gas services and energy market analyses to Toyota facilities in the United States, Canada and Mexico.

El Paso Pipeline Partners LP is buying an additional 25% stake in southeastern interstate pipeline system Southern Natural Gas Co. (SNG) from El Paso Corp., the parent of both companies, for a total of $667 million. The master limited partnership would own an 85% interest in SNG once the transaction closes. SNG’s throughput volumes in 4Q2010 were 2,542 billion Btu/d, compared with 2,329 billion Btu/d in the year-ago quarter. SNG’s 2010 volumes totaled 2,505 billion Btu/d versus 2009 volumes of 2,322 billion Btu/d.

El Paso Pipeline Partners LP (EPB) is buying an additional 22% stake in southeastern interstate pipeline system Southern Natural Gas Co. (SNG) from El Paso Corp., the parent of both companies, for $587 million.

Western Gas Partners LP, which until now has built its portfolio by acquiring assets from parent Anadarko Petroleum Corp., agreed last week to pay $303.3 million to buy some U.S. midstream properties from Encana Corp.

Western Gas Partners LP, which until now has built its portfolio by acquiring assets from parent Anadarko Petroleum Corp., said Tuesday it would pay $303.3 million to buy some midstream properties from Encana Corp.’s U.S. subsidiary.

The Riverstone/Carlyle Global Energy and Power Funds Monday announced completion of the acquisition of USA Compression Holdings LP, the parent company of USA Compression Partners LLC, a natural gas compression services company headquartered in Austin and Dallas, TX. Terms of the transaction were not disclosed.

Targa Resources Partners LP said it is buying a stake in a Gulf of Mexico region gas gathering and processing business from its parent, Targa Resources Inc., for about $167.5 million.

Moody’s Investors Service last Thursday downgraded the senior unsecured debt ratings of NGPL PipeCo LLC, parent of Natural Gas Pipeline Co. of America (NGPL), to junk status (Ba1) from the lowest investment grade (Baa3) following FERC’s approval of a settlement of allegations that NGPL over-recovered its cost of service.

Moody’s Investors Service Thursday downgraded the senior unsecured debt ratings of NGPL PipeCo LLC, parent of Natural Gas Pipeline Co. of America (NGPL), to junk status (Ba1) from the lowest investment grade (Baa3) following FERC’s approval of a settlement of allegations that NGPL over-recovered its cost of service.