Inter-Ontario (formerly Superior Slag) is uniquely located at the hub of the Great Lakes in Sault Ste. Marie Ontario on the border with our sister city Sault Ste. Marie Michigan. The company is owned by brothers Richard and Michael Prpich Jr. It was founded by the late Mike Prpich Sr. in 1964.



114 Allen's Side Road
Sault Ste. Marie, ON
P6C 5P5




[email protected]

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