As Al Gore once said, the maximum that is politically possible to preserve the biosphere is less than what is technically needed.

Only about one percent of the Coast Range forest is in old growth.  The Elliott Forest isn't protected if a lot of it will still be subjected to industrial deforestation.  Oregon's coastal forests have among the highest tonnage of biomass per hectare of any place on the planet, using all of that land for carbon sequestration would be a minimal requirement for restoration.  There are plenty of tree farms surrounding that site.

Exporting logs and wood chips from Coos Bay is the wrong direction.