Pacific Gas & Electric expanded what had been a customer-specific OFO for Saturday into systemwide Stage 3 high-inventory OFOs for Sunday and Monday. The sytemwide OFOs carried $5/Dth penalties for positive daily imbalances exceeding a 2% tolerance. However, no order is in place for today.

Northern Natural Gas reported detecting a leak on mainline block valve 665 of Matagorda Offshore Pipeline System, which NNG operates off the Texas coast. A temporary patch was installed pending permanent repairs, tentatively scheduled to begin June 1. Assuming weather conditions don’t cause delays, all MOPS production (about 115,000 MMBtu/d at 33 receipt points) must shut in June 1. Repair work, estimated to last a maximum of three days, will begin June 4. Offshore producers could begin flowing gas again on June 7. The outage will affect volumes entering Florida Gas Transmission at the MOPS interconnect upstream of Station 3 in Zone 1.

Citing construction details, Tennessee said Monday a subsea tie-in outage of the West Cameron 173C and West Cameron 178 meters (see Daily GPI, April 12) will last through at least May 11. The pipeline also said it has delayed a tie-in outage of the 509A-3100 Lateral until May 18-22 due to the unavailability of divers. The lateral work will prevent nominations from being accepted at the Vermilion 200 and Vermilion 203 meters. In addition, due to the unavailability of necessary equipment, Tennessee will postpone a relocation of Main Line Valve 825, previously scheduled for May 13-18, until June 4-12. The valve relocation is prompted by a Louisiana state highway expansion project. Also during June, Tennessee will replace two mainline valves and install a pig launcher and receiver between Stations 856 and 860. See the bulletin board for related service restrictions.

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