Hardwood is named on more of these Clare County records than anything else, and species decides more of what a load is worth than the gate it goes through. The sources here go no further than that, which is a starting point rather than a specification. The species guides take the trees one at a time - what each is cut for, how it is graded, and where the line between pulpwood and sawtimber falls.
These 13 listings are 4% of everything the Michigan sources publish, concentrated in one county. A mill does not care which line your ground sits behind, so read outward: all 302 Michigan listings cover 73 counties, 38 of which carry enough listings for a page of their own.
None of this says whether a gate in Clare County is open or what a load would fetch - no agency document records that. A price comes out of a sale run properly: the landowner's guide to selling timber takes the steps in the order they happen, sealed bidding puts one tract in front of several buyers at once instead of taking the first number offered, and a consulting forester runs the whole thing for you if you would rather not.