McChooky
Free Ranging
They worked the sawmill 20 years.It was closed after my grandfather was injured and died in the 50's (73 years ago) The sawdust piles were still steaming in the 60's when we were kids growing up .They're long gone now.I raised a garden there in the 80'sLots of respect to those guys risking their lives everyday felling trees. Although I have lots of DIY experience taking down trees, cutting the wood up, and maybe splitting it into firewood, it's not like I am out there risking life and limb every day. Most of my office jobs had a risk of a papercut...
I have watched a lot of Paul Gautschi YouTube videos on his Back to Eden method of composting wood chips and making soil. I imagine that sawdust made some great soil when mixed with other organics and left to compost. What many people miss in Paul's method is that the wood chips he uses are actually composted with animal manures before he puts the "wood chips" out in his garden. Plants don't grow well in plain wood chips. I think many of us would his "wood chip" use as compost based on wood chips.
I think sawdust would make great filler for the voids left between the larger logs in the bottom of a hügelkultur raised bed. You could really pack that stuff in those voids and make the bed even better with less soil level loss in the raised bed in those first years.
I am assuming that your sawdust garden had been sitting for a number of years and composting in place. I don't think plants would grow well in fresh sawdust.