Drainage Areas

This map shows the five major ocean drainage areas in Canada: Hudson Bay, Arctic Ocean, Atlantic Ocean, Pacific Ocean and Gulf of Mexico. An inset map shows the major dams with reservoir capacity larger than 1 billion cubic metres. Six of the 10 largest hydro-electric generating stations by capacity are located in the province of Quebec; whereas, the largest, Churchill Falls is in Newfoundland and Labrador. The other 3 are located in British Columbia.

Data and Resources

Additional Info

Field Value
Last Updated April 17, 2026, 20:23 (UTC)
Created April 17, 2026, 20:23 (UTC)
contact_email geoinfo@nrcan.gc.ca
contact_person {}
criticality_level []
data_dictionary ["boundaries", "society"]
geographic_scope []
open_canada_collection geogratis
open_canada_date_published 2006-01-01 00:00:00
open_canada_keywords {"fr": ["barrage", "bassin hydrologique", "carte géographique"], "en": ["dams", "geographical maps", "watersheds"]}
open_canada_subject ["government_and_politics", "society_and_culture"]
sensitivity_level unrestricted
title_fr Aires de drainage
update_frequency as_needed