The City of Hamilton, Ontario, is investigating how loads of concrete ended up in a municipal sewer during the construction of a transit station. A contract crew was working at the site and filling caissons when they realized that “one … took more concrete than they were expecting.”“We know we’ve got a problem,” says Dan McKinnon, Hamilton’s director of water and wastewater, in a Hamilton Spectator article.City workers used cameras to view the obstruction. McKinnon doesn’t anticipate the blockage will cause any problems for city residents because the affected sewer backs up into a tank. However, when asked by the
