Oct 11 (Reuters) -

PetroChina Canada will no longer be a committed shipper on

the Trans Mountain oil pipeline after assigning its contracts

to another party, the company said in a letter filed with the

Canada Energy Regulator, dated Oct. 10.

The recently expanded Trans Mountain pipeline has capacity

to ship 890,000 barrels per day (bpd) of crude from Alberta's

oil sands to the Port of Vancouver in British Columbia.

The company is a subsidiary of China's top oil-producing firm

PetroChina and holds six assets in western Canada,

including the MacKay River and Dover oil sands projects and a

stake in the LNG Canada liquefied natural gas project, due to

start operating next year.

A spokesperson for PetroChina Canada did not immediately

respond to a request for comment on why the company had given up

its committed shipping agreements.

PetroChina Canada wrote to regulators to say it was

withdrawing as an intervenor in a

long-running dispute

between Trans Mountain and its committed shippers over

pipeline tolls.

"PCC has now assigned these agreements to another party

and will not be a committed shipper going forward," the letter

said.

PetroChina did not name the other party.