Oshawa campus closure – Saturday, July 6 Posted on July 5, 2013 at 9:36 am. Durham College’s Oshawa campus will be closed tomorrow, Saturday, July 6 from 7 a.m. to 7 p.m. for annual electrical substation maintenance. For everyone’s safety, all campus buildings will be closed during the power outage as there is only minimal emergency power available. In addition, there will be no telecommunication or computer service available. Durham College apologizes for any inconvenience this may cause. SHARE: