Ontario Ministry of Agriculture, Food and Rural Affairs - Drainage Page
www.omafra.gov.on.ca/english/landuse/drainage.htm

DFO Drain Primer, Ontario Edition
http://www.dfo-mpo.gc.ca/regions/central/pub/drain-on/index-eng.htm

OSPE (Ontario Society of Professional Engineers)
www.ospe.on.ca

Ontario Ministry of Transportation - Drainage Management
http://www.mto.gov.on.ca/english/engineering/drainage/index.shtml

Note: Each Link opens in a new page.