There is no slush in this picture. All that clear stuff is ice and the stuff that looks like dirt is ice with dirt mixed into it. I got one successful drainage ditch out of the green run extension, one moderately successful ditch draining away from the door (the base is just barely above the ice level by a couple millimeters) and one failed attempt between them where the shovel just bounced back up and nearly hit me in the face with the handle.
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At least I was able to get out of the driveway today. The more miraculous part was being able to get back up it on the way back since it's currently coated in the same stuff as in the picture above. Anyway, I now have two bags of pine bark chips; that was all I could pry off the frozen pile without ripping the bags. The chips are larger than I would have liked, more like 1-2", but the smaller ones I've used before were completely frozen in place. Tomorrow I'm inclined to rake the straw to one side, put the chips down where it's wet, and then rake the straw back over the top. I realize it would mix slowly over time but it feels like in the short term the straw needs to be lifted up a bit while things drain.