Complex sentence: The St. Clair Parkway was also a part of the St. Clair River Parkway Commission, (Founded in 1966) until that was disbanded in February 2006, and its parks were reverted to local municipal/town/township control.
Split into simpler sentences: The St. Clair Parkway was managed by the St. Clair River Parkway Commission, (Founded in 1966) until the Commission was disbanded in February 2006. At that time the parks were reverted to local municipal/town/township control.