Systemwide

After warning Thursday that one might become necessary, El Paso on Friday declared a systemwide Strained Operating Condition due to high linepack. The tolerance for positive daily imbalances was set at 10%.

Transwestern issued a systemwide Alert Day notice due to low linepack for Monday, prompting Southwest Gas to follow up with a Hold Burn to Scheduled Quantities notice. Both actions were canceled Tuesday as a result of Transwestern linepack returning to normal.

Although Ruby Pipeline operator El Paso Corp. had indicated Tuesday that a systemwide shutdown might be ended as early as Wednesday, the in-service date has been shifted to sometime between Saturday and next Wednesday. Ruby said a full assessment of the scope of necessary repairs has been completed, and the longest lead item is for replacement of the 42-inch block valve. The restoration of service depends on the time required to secure and install the replacement valve.

Pacific Gas and Electric is ending a systemwide low-inventory OFO Wednesday after it had been in effect on the utility’s California Gas Transmission system Monday and Tuesday.

Citing mild weather and limited operational flexibility, Tennessee said a systemwide Imbalance Warning will become effective Saturday. All delivery point operators will be required to keep actual daily takes out of the system equal to or greater than scheduled quantities regardless of their cumulative imbalance position. All receipt point operators must keep actual daily receipts into the system equal to or less than scheduled quantities regardless of their cumulative imbalance position.

Anticipating that storage injection nominations will exceed its capability, Southern said it was implementing a systemwide OFO Type 6 for long imbalances effective Saturday. Tiered penalties would apply to excess imbalances.

Tennessee lifted a systemwide Imbalance Warning Saturday. The pipeline also rescheduled a line abandonment project for the 523M-7300 and 523M-7600 lines offshore Louisiana to Wednesday through Oct. 4. The work, which will require suspension of flows at four Vermilion meters, previously was set for last Saturday through Oct. 2.

Pacific Gas and Electric issued a systemwide Stage 1 high/low-inventory OFO for Friday, setting penalties of 25 cents/Dth for either negative or positive imbalances exceeding a 10% tolerance.

Southern California Gas ended a high-linepack OFO Sunday. Northern California neighbor Pacific Gas and Electric had a systemwide high-inventory OFO in effect Sunday but canceled it Monday.