What is recognized as the primary source of hydropower in Michigan?

The Au Sable River System is recognized as the primary source of hydropower in Michigan due to its significant flow and the historical development of hydroelectric facilities along its course. The river provides a reliable source of water flow that is suitable for generating electricity, making it a key resource for hydropower generation in the state.

The Au Sable River has a relatively large watershed area and is characterized by its consistent water levels, which contribute to its effectiveness as a hydropower source. Additionally, it has an established history of dam construction and hydroelectric projects that leverage its flow for energy production.

In contrast, while other rivers like the Grand River and the Flint River have their own importance and can also contribute to local ecosystems and economies, they do not match the Au Sable in terms of hydropower capacity and historical use for electricity generation. The Rouge River, while significant, also does not serve as a primary hydropower source compared to the Au Sable. This makes the Au Sable River System the most recognized and developed river for hydropower in Michigan.