A day after cautioning that it might need to declare an Underage Alert Day Tuesday due to high linepack and soft market-area demand (see Daily GPI, June 20), conditions apparently had changed enough that Florida Gas Transmission issued an Overage Alert Day instead, citing forecasts of 90-degree weather in Florida. The OAD carried 25% tolerance for negative daily imbalances.

MRT said a System Protection Warning will take effect Wednesday until further notice due to high linepack levels throughout its Main Line system. See the bulletin board for the warning’s restrictions.

Northwest expected a Declared Deficiency Period that was implemented at the start of Tuesday’s gas day to last 24 hours. Northwest was installing pigging facilities and replacing a block valve on a section of the mainline just north of the Vernal (UT) Compressor Station. During the outage, scheduled capacity through Vernal was zero. “Since north-flow nominations exceed south-flow nominations, Northwest’s daily deficiency volume will equal the north-flow design capacity of 333,000 Dth/d,” the pipeline said.

An outage of the Sea Robin Processing Plant (see Daily GPI, June 20) has been extended through Wednesday’s gas day. TGT, the only downstream pipe that Sea Robin Pipeline has indicated is accepting deliveries of unprocessed gas, will continue to do so Wednesday, Sea Robin said.

Southern reported experiencing “significant long imbalances in the market area over the [June 17-18] weekend.” As postings in recent weeks have indicated, working gas storage levels are significantly above levels for a comparable period last year, it added. Further, on May 24 announced restrictions being placed on certain storage transactions effective in order to preserve firm storage obligations and interruptible storage quantities that already had been accepted. “We ask you to monitor your business closely to ensure that an out of balance situation does not cause Southern to implement an OFO to protect the operational integrity of the system,” Southern told shippers. “As you are aware, an OFO with associated penalties of up to $15/Dth can be implemented at specific receipt/delivery points or systemwide if imbalances threaten the operational integrity of the system.” Southern said it will post a Type 6 OFO probability notice around 2 p.m. CDT Thursday “or sooner if there are adverse changes in system conditions or on any scheduling cycle.” As of June 15 the pipeline estimated having 46.8 Bcf of working gas inventory, or 78% of its total working capacity of 60.0 Bcf. Comparable figures were 34.2 Bcf (57%) on June 16, 2005 and 34.8 Bcf (58%) on June 17, 2004.

El Paso will reduce North Mainline capacity from a base of 2,200 MMcf/d by varying amounts during much of July due to a series of maintenance projects (see the bulletin board for details). Most of the cuts will be fairly minor; the only ones that will hit three digits occur July 11, 135 MMcf/d; July 12, 350 MMcf/d; and July 13, 110 MMcf/d.

Dominion reported completing maintenance on Cornwell Station’s #9 unit ahead of schedule Tuesday and said producers in bubbles 2207, 3226 and 3227 may bring production back on-line following notification to Dominion field personnel.

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