Organizers say events included a walk Saturday along the Kalamazoo River near Battle Creek.
The Enbridge spill released more than 800,000 gallons of oil from a broken pipeline in 2010. It spoiled approximately 40 miles of the Kalamazoo River and Talmadge Creek. State regulators say any remaining oil isminimal and at the bottom of the river or in the banks.
Enbridge has agreed to restore or create 300 acres of wetlands to improve the Kalamazoo River watershed. The company also will continue monitoring the impact of the spill and spend $75 million on various projects in the area.