The valleylands associated with the Speed and Eramosa Rivers form the backbone of the City’s Natural Heritage System. They perform important ecological functions, and contain a diversity of habitats within the city. Valleylands and other river and stream corridors are also an essential element in protecting connectivity within the Natural Heritage System.  The City’s rivers are protected as part of the Natural Heritage System and form part of Significant Valleylands, and Surface Water and Fish Habitat features.