A fish farm along Michigan’s famed Au Sable River has gotten the green light to jump production from around 20,000 pounds annually to as much as 300,000 pounds. It is a decision that has environmental activist groups in a lather.

The decision to allow the increase came from Administrative Law Judge Daniel Pulter when he allowed modifications to a previous Department of Environmental Quality that had limited the amount of fish to be raised. The facility is a former fish hatchery for the state of Michigan.

Environmentalists say they are considering possibly appealing the ALJ’s decision because of concerns for the water quality and safety of the famed river.