Florida Gas Transmission extended an Overage Alert Day for customers in its market area into its fourth day Thursday and further loosened the tolerance for negative daily imbalances from 15% to 25%.

As anticipated, Southern Natural Gas was able to return the 20-inch diameter Main Pass-Franklinton Line offshore Louisiana to service Thursday morning, allowing it to cancel a force majeure and resume accepting nominations at the Cox Bay receipt point (see Daily GPI, Aug. 22). Southern reported completing repairs to a unit at DeArmanville Compressor Station and bringing it back on-line. Repairs to a Rome Compressor Station unit are still in progress, Southern said, and the unit is anticipated to return to service no sooner than Friday. Until that happens, the pipeline may be required to allocate/limit interruptible capacity (B-1 and IT) in Group 4-Chattanooga Group, Group 13-East Tennessee Group and Group 59-Tallapoosa Group and/or limit deliveries to 6% hourly entitlement rights.

Based on results of an Aug. 16 anomaly investigation, Northwest said it will perform another 15 high-priority anomaly digs just south of the Muddy Creek Compressor Station beginning Aug. 28 and continuing through Sept. 10. The work will reduce available capacity at the Muddy Creek South Constraint Point from 513,000 Dth/d to 160,000 Dth/d. Recent average northbound nominations through the constraint point have been approximately 234,000 Dth/d, Northwest said, further noting that the Opal, Frontier and Shute Creek receipt points are north of the Muddy Creek South Constraint Point. “In addition, there are several planned maintenance projects at various points north of Muddy Creek that will run concurrently with the anomaly investigations,” the pipeline said. “The Baker Compressor [Station] annual inspection is scheduled for Aug. 27-30 and will reduce the available capacity at the station from 444,000 Dth/d to 392,000 Dth/d. On Aug. 28-30 there will be a complete mainline outage for pigging facility installations between the Plymouth and Goldendale Compressor Stations. Nominations at the Plymouth North Constraint Point must net to zero during this work. The Kemmerer Compressor [Station] annual inspection work scheduled for Aug. 28-31 has been postponed to a later date due to a shortage of resources.” If primary nominations exceed available capacity during any of those outages, Northwest said, it will declare a Deficiency Period and cut nominations accordingly. It noted that because all of these projects impact northbound nominations, they may offset each other to some extent. During the mainline outage work between Plymouth and Goldendale, Northwest will decrease the south-end anomaly work between the Pleasant View and La Plata compressor stations in order to allow full design volume of 352,446 Dth/d to be scheduled through the Pleasant View Compressor Station.

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