I'm not a forestry professional, but I am pretty knowledgeable.
They claim to want to plant Red Pine and Jack Pine after the gravel extraction.
The soil will need to be reclaimed after gravel extraction.
Tree's grow best where the soil is native, and has the beneficial fungi that are symbiotic with trees. They won't have that. They know this.
The tree's will need to be at least 10 years old to become seed bearing, and 50 years old before becoming fully productive.
Who would be interested in waiting 5 to 10 years for the extraction, another year or two to reclaim the land, then plant and wait for seed bearing? Your talking 20+ years!
The motivation is shorter term. It has nothing to do with getting seeds.
When the climate is warming, why would you plant trees far south of their native range?
Red Pine Native Range
Jack Pine Native Range
The State owns property in Northern Michigan that already grows Jack Pine and Red Pine. Naturally.
Some of it was planted, in rows... and they are mature (seed bearing).
This doesn't make sense.
The motivation is shorter term.