YONKERS - Con Edison says it is still investigating the root cause of this week's power failure on Metro-North’s New Haven Line, and service likely won’t be fully restored for more than a week.

Con Ed's target date for getting service fully back up and running is Oct. 7.

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At a news conference today, Con Ed and the MTA discussed a plan to restore service that will create a temporary substation in Harrison from scratch. Crews will try to draw on Harrison's residential feeder systems to bring power to the tracks, and they are performing tests this weekend to see if the system can handle it.

If the substation works, combined with diesel power, the New Haven Line will still only be at half-capacity at the start of the week.

The railroad says it will be providing bus service next week to accommodate affected commuters.