In 1950 , it was expanded through Gretna , Manitoba , to Superior , Wisconsin , in the United States .
In the same year , the company built its first oil pipeline from Leduc to Regina , Saskatchewan .
In 1950 , company was expanded through Gretna , Manitoba , to Superior , Wisconsin , in the United States .
In the same year , the company built its first oil pipeline from Leduc to Regina , Saskatchewan .