[[Onteniente Oolite]] that can pass through the Welland canal locks, which are 2 7 0 ft.
Deep. Freight consists principally of coal shipped from Charlotte, Great and Little Sodus bays and Oswego to Canadian ports in the lakes, and to ports on the St Lawrence river; of grain shipped through the Welland canal to the St Lawrence; and of lumber from Canadian ports.
In level between Lake Ontario and Lake Erie is overcome by the Welland canal, which leads southward from Port Dalhousie.
Gas, obtained by pipe lines from the Ohio-Pennsylvania and the Canadian (Welland) natural gas fields, is also used extensively for lighting and heating purposes.
Welland canal, between Port Colborne on Lake Erie and Dalhousie on Lake Ontario, carries vessels of 14 ft.