On January 14, 2021, the Court of Appeal upheld the Superior Court’s decision and ordered the City of Montreal to cease all discharges into St. Pierre creek and to ensure its cleanup. However, this victory is bittersweet, as the Court proposed diverting and channeling the creek; while this would solve the problem of spills, it would eventually lead to its drying up and the loss of the last witness of the ancient St. Pierre River that once flowed from Mount Royal to the Old Port, which is what Les Amis du parc Meadowbrook fears.
In 2023, Les Amis du parc Meadowbrook submitted a request to have the St. Pierre River designated as a protected site, which was denied by the Ministry of Culture and Communications in 2024.