Pacific Gas and Electric did not extend a systemwide Stage 2 high-inventory OFO on its California Gas Transmission system beyond Thursday.
After tightening an Overage Alert Day (OAD) tolerance for negative daily imbalances from 20% to 15% Wednesday, Florida Gas Transmission reduced the tolerance further to 10% Thursday. The OAD has been in effect continuously since July 8.
Saying it found a leak on the Bluewater System upstream of Station 523, Tennessee declared a force majeure Thursday for five Ship Shoal and two South Pelto meters. “Based on current flows, Tennessee is not requiring adjustments to nominations at this time but is requiring the [affected] operators and producers to keep physical flow to zero” until repairs are completed, the pipeline said.
Estimating that the work will take three to five days, Transco said it began repairs Thursday to the coating of its 12-inch diameter line on the Southeast Louisiana Lateral between Ship Shoal 214C and Ship Shoal 214F. The Ship Shoal 214F and South Timbalier 198 and 217 platforms, which have a normal aggregate flow of about 7,000 Dth/d, are not be available during the repairs, Transco said.
Cheyenne Plains Gas Pipeline reported completing repair of a compressor vibration issue to permit Cheyenne Compressor Station to return to full capacity of 809 MMcf/d Tuesday. In announcing an associated force majeure Monday afternoon, Cheyenne Plains had cut station capacity to 696 MMcf/d for Tuesday’s Evening Cycle nominations.
In an update on the force majeure event last Friday at Laramie East Compressor Station (see Daily GPI, July 26), CIG said it had expected to complete the required engine turbocharger maintenance Wednesday, but based on information from field personnel, the force majeure will continue until further notice.
Tennessee said Wednesday heavy rains in the area have halted construction that began June 7 between Main Line Valves 17-2 and 20-2, delaying the section’s return to service and keeping physical flows suspended at the Katy Transport meter for a while longer. Tennessee said current projections now indicate that the work will be completed Friday afternoon; previously it had expected to finish Wednesday (July 28).
Citing gas quality issues, ANR said it has shut in the BURDETTE INT receipt point in Mississippi and will not accept nominations or flow gas there until further notice.
Noting that a capacity allocation was implemented for five group segments last Saturday, Southern said it added three more groups to the restriction Thursday. See the bulletin board for a list of affected groups.
Rockies Express (REX) said Thursday gas quality problems involving exceeding its tariff specification have been resolved at the Wamsutter Echo Springs receipt point. REX will continue to monitor the point’s gas quality and notify shippers of any changes.
Opal Plant operator Williams Field Services (WFS) said it will take the plant’s Hamsfork compressor down Tuesday through Thursday next week for preventative maintenance. Estimating the impact at 8 MMcf/d, WFS said affected customers will be contacted.
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