TransCanada said Tuesday capacity of the Northern Ontario Line has been reduced due to an unplanned compressor outage at Station 58 in combination with a planned line outage at Main Line Valve (MLV)58-59 line 3. Based on operational conditions and nomination levels to eastern markets, IT service was not fully authorized for Tuesday’s gas day, the pipeline said. It added that with “current operational conditions and current or increased nominations levels, there is a possibility that discretionary services may not be fully authorized for the duration of these outages.” The planned line outage at MLV 58-59 line 3 is expected to end April 28. The duration of the Station 58 compressor outage is unknown, TransCanada said, but as of Tuesday it was expected to last until at least Friday and possibly beyond.

An emergent situation at Compressor Station 823 is preventing the station from operating, Tennessee said Tuesday morning. Repair assessments are under way, the pipeline said, but it may eventually be required to restrict a portion of Secondary Out of the Path nominations pathed through Station 823 during the outage.

Gulf South, which began an estimated 30 days of maintenance on Bistineau Compressor Station Unit #2 on March 19 (see Daily GPI, March 19), said Tuesday the work has been extended through May 6.

Questar will hold a conference call with storage customers at 1:30 p.m. MDT Thursday to introduce and answer questions about its proposed tariff modifications addressing the Clay Basin conditioning settlement. The dial-in number to participate is (888) 597-3686 and the conference code is 8013245173. Upon connection to the conference call, shippers are asked to announce their name and company name. The proposed tariff sheets can be found at; click on ” Proposed Clay Basin Stipulation Tariff Sheets – April 19, 2007.”

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