Citing anticipated demand in conjunction with below-normal temperatures forecast for much of its market area, Transco said an Imbalance OFO will become effective Tuesday. The OFO requires shippers to ensure that daily due-pipe imbalances be limited to 5% or 1,000 Dth, whichever is greater, Transco said. Due-shipper imbalances will not be subject to penalty. In addition, effective Sunday Transco was not allowing either makeup nominations for due-shipper imbalances or excess storage withdrawals under Rate Schedules GSS and WSS.

Due to forecasts of colder-than-normal temperatures, Northern Natural Gas said System Overrun Limitations will be in effect Monday for all market-area zones and for the New Market, MN, #1 Town Border Station. Northern projected that its system weighted average temperature will drop to five degrees that day.

Saying its ML-7 market area is expected to have temperatures near or below zero beginning Monday and continuing through the rest of this week, ANR declared an “Extreme Condition,” effective Monday, that will lower its Swing Percentage (imbalance tolerance) from 10% to 5%. See the bulletin board for other related restrictions.

Northwest said Thursday it could no longer offset OFOs at Kemmerer Compressor Station by using north-end system storage. The pipeline reminded shippers of a previous notice that said Northwest would allow Kemmerer to be overscheduled until its north-end storage balance went below 1.5 Bcf. “Currently our north-end storage balance is at 1.3 Bcf,” Northwest added. It said that beginning Saturday (Jan. 10) it would send out daily OFO notices of realignment volumes whenever Kemmerer was scheduled at more than 680,000 Dth/d.

Southwest Gas lifted Friday the “hold to burn” notice it had issued Tuesday due to low linepack and “repeated overpulls” by customers. In a related note, Kern River said Friday its linepack had returned to normal systemwide.

Tennessee reported being informed by Crosstex Energy, operator of the Sabine Gas Processing Plant located at the terminus of Tennessee’s Offshore Sabine Pipeline System at Johnsons Bayou, LA, that it started gas processing operations at the plant Friday. “Acceptable HDP [hydrocarbon dew point] levels have been achieved” at the plant tailgate, Tennessee said, and thus shippers will no longer be required to nominate gas to third-party pipelines at Johnsons Bayou. It reminded customers upstream of the plant that they should start making Plant Thermal Reduction nominations.

Tennessee also said it planned to initiate pressure testing Friday (Jan. 9) of the 36-inch diameter Bluewater East Leg between Cocodrie, LA, and Ship Shoal 198. Producers in that segment were required to shut in. Contingent upon a successful leak test over the weekend, Tennessee said it would allow all production (a) attached to the 30-inch diameter Bluewater Header between Ship Shoal 198 and Main Line Valve 523M-105 in the South Marsh Island 79 block; (b) attached to the 30-inch diameter “Triple T” system between Ship Shoal 198 and Eugene Island 349; and (c) attached to the 36-inch diameter East Leg between Ship Shoal 198 and Cocodrie to recommence flows early this week, provided that the meters have met Tennessee’s meter reactivation requirements.

Gulf South said it will begin two days of scheduled maintenance Monday on Unit #1 at Montpelier Compressor Station, during which capacity through the station could be reduced by as much as 75,000 Dth/d. Gulf South had started an estimated six to eight weeks of unscheduled maintenance a week earlier on the station’s Unit #3, which it said could result in a similar capacity reduction (see Daily GPI, Jan. 7).

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