Buried beneath the gravel shoulder of the intersection is a 16-inch diameter wide water main. The pipe is part of the Lake Huron Primary Water Supply System, the same vast network that carries treated Lake Huron water to 15 municipalities across an area the size of Prince Edward Island. Parts of London, along with Middlesex Centre, Strathroy-Caradoc, Lucan-Biddulph, Grand Bend and others, are supplied by this system.