Portland, OR -

The shipment of a giant piece of oil refinery equipment through Eastern Oregon has been put off until Sunday night.

An Oregon company transporting the 900,000-pound load has reported difficulty loading and securing it.

Spokeswoman Holly Zander says those difficulties have been overcome, and the load was ready to move Tuesday night.

But that left only one night before the Thanksgiving holiday -- the rig blocks two-lane highways, so it's restricted to nighttime travel.

Zander says there's no big rush to get the equipment to Alberta, Canada, so rather than parking along the road, it will remain at the Port of Umatilla through the holiday.

The company expects the trip to take 20 days, the first six through mostly byways in Eastern Oregon, and then on to Idaho and Montana.