The Mackinac Straits Corridor Authority is one of two state boards that are involved in the proposed tunnel.
Authority chairman, Paul Novak, says Enbridge is now required to submit a detailed risk management plan to the Authority. But the Michigan Public Service Commission's role in this process still remains unclear.
"The point about the risk management plan, requiring not only that it be submitted, but that it be approved -- that is something for which clarification from the PSC could be sought if we don’t think it is sufficiently."
During public comment, several attendees warned that going forward with the tunnel will have dangerous consequences for the Great Lakes.