Effective

Tennessee implemented an Imbalance Warning for market-area Zones 5 and 6 Thursday, saying effective immediately it requested that customers match physical flow with scheduled quantities to prevent imbalances in those zones that would threaten the pipeline’s operational integrity. “Due to the emergent repair issue at Station 321 and high demand in the Northeast, Tennessee does not have the ability to absorb imbalances caused by underdeliveries by receipt point operators into the system and overtakes from the system by delivery point operators.”

Northern Natural Gas declared a System Overrun Limitation for Tuesday in market-area Zone EF due to low temperatures forecasted for that area of its system.

Northern Natural Gas declared a System Overrun Limitation for Tuesday in market-area Zone EF due to low temperatures forecasted for that area of its system.

The Southwest Gas LDC issued a Hold Burn to Scheduled Quantities notice effective Wednesday until further notice due to low linepack on Kern River and drafting of Southwest’s system.

Australia’s Macquarie Group is combining its North American gas and power marketing businesses — Macquarie Cook Energy LLC and Macquarie Cook Power Inc. — under Macquarie Energy LLC, effective Feb. 1, giving the firm a single brand in North America. Last year saw the firm’s gas and power businesses grow through the acquisition of weaker players that had faltered.

Macquarie Group is combining its North American gas and power marketing businesses — Macquarie Cook Energy LLC and Macquarie Cook Power Inc. — under Macquarie Energy LLC, effective Feb. 1, giving the firm a single brand in North America. Last year saw the firm’s gas and power businesses grow through the acquisition of weaker players that had faltered.

MRT said it will lift a System Protection Warning at the start of Wednesday’s gas day.

Tennessee lifted a Critical Day 2 OFO at the start of Wednesday’s gas day, but that afternoon it said that due to colder temperatures and in order to maintain linepack, a Critical Day 1 OFO would become effective Friday until further notice in Zones 0, 1, L and 2 (see the bulletin board for details). Tennessee said it will continue to monitor Zones 3, 4, 5 and 6, and implement an OFO in those zones if necessary. The pipeline ended a force majeure late Tuesday evening at Station 47.

Denver-based MarkWest Energy Partners LP has sold its 50% interest in Starfish Pipeline Co. LLC to Enbridge Offshore (Gas Transmission) LLC, an Enbridge Inc. company, effective Dec. 31, 2009, the company said Monday.