0000950137-07-009415 11-K 1 20061231 20070628 20070628 BAY STATE GAS CO /NEW/ 0000010488 4924 042548120 MA 0930 11-K 34 002-35994 07946865 300 FRIBERG PKWY WESTBOROUGH MA 01581-5039 5088367000 300 FRIBERG PARKWAY WESTBOROUGH MA 01581-5039 SPRINGFIELD GAS LIGHT CO 19790108 11-K 1 c16335ae11vk.htm ANNUAL REPORT