(Adds PHMSA statement, share activity)
WINNIPEG, Manitoba, Feb 19 (Reuters) - TransCanada Corp restarted a section of the Keystone oil pipeline on Tuesday, following a leak in Missouri earlier this month, company spokesman Terry Cunha said.
TransCanada had shut an arm of Keystone from Steele City, Nebraska to Patoka, Illinois on Feb. 6 after leaking 43 barrels of crude oil.
The shutdown restricted the flow on the 590,000 barrels-per-day Keystone pipeline system, a critical artery taking Canadian crude from northern Alberta to refineries in the U.S. Midwest.
The line restarted with a 20 percent reduction of pressure, a spokesman for U.S. regulator PHMSA (Pipeline and Hazardous Materials Safety Administration) said.
TransCanada shares finished up 0.3 percent at C$56.90 in Toronto. (Reporting by Rod Nickel in Winnipeg, Manitoba Editing by Marguerita Choy)