The middle river, that being the portion north of the dam at 30th Street holds a portion of the drinking water for the city of Tampa but it is still a part of the larger Hillsborough River which begins in the Green Swamp and flows to Tampa Bay.
The middle river, that being the portion north of the Tampa Dam at 30th Street is commonly referred to as the reservoir because it holds the drinking water for the city of Tampa. Nevertheless it is still a part of the larger Hillsborough River which begins in the Green Swamp and flows to Tampa Bay.