Ceres converted it from storage to a grain terminal which London Agricultural Commodities has been leasing.
It paid $5.42 million.
The terminal was built as a Robin Hood flour mill, but closed in 2008.
In January the federal government announced that it and St. Lawrence Seaway Management will spend $45.3 million on three wharf sites at Port Colborne.
Port Colborne is at the end of the Welland Canal between lakes Erie and Ontario.
The federal government, which put up $22.7 million for that project under the National Trade Corridors Fund, said the project will help relieve “supply chain congestion” in the region.