GUELPH – There’s roughly 700 acres of aggregate divided by a road straddling two towns.How do you get material from one side of the other without crossing the road? You go under – through a tunnel, with a conveyer belt – it turns out.Bolton-based James Dick Construction wants to move aggregate from a Caledon pit to one in Erin, directly across Winston Churchill Boulevard, with a 260-foot tunnel/belt system.“We’re starting to dig a hole for where…