Steve:
I saw your earlier post, as well. I suspect much has to do with your local soil conditions. I used about 6 inches of crusher run (about 1.5" minus, meaning a lot of finer material mixed with the gravel). Crusher run tends to pack very well, due to the fines. I probably should have used 3 inches or so of dust on top of the crusher run. The dust is smaller (probably 0.25 inch minus) and also packs well. What worked up into the sand would not have been much larger than the sand itself. This would have given a total of about 9 inches of base, which would be plenty for horses in our area.
Your contractor is probably more familiar with your local conditions and what works well there. Mixing clay with the stone dust approximates sand. I would expect the smaller clay particles to be leached down through the sand and help bind the base together. If not, the clay could cause a dust problem during dry spells -- requiring watering to maintain a good surface footing and hold the dust down. Your arena probably works well for your area - enjoy it. /forums/images/graemlins/grin.gif
Merry Christmas!
Kip
I saw your earlier post, as well. I suspect much has to do with your local soil conditions. I used about 6 inches of crusher run (about 1.5" minus, meaning a lot of finer material mixed with the gravel). Crusher run tends to pack very well, due to the fines. I probably should have used 3 inches or so of dust on top of the crusher run. The dust is smaller (probably 0.25 inch minus) and also packs well. What worked up into the sand would not have been much larger than the sand itself. This would have given a total of about 9 inches of base, which would be plenty for horses in our area.
Your contractor is probably more familiar with your local conditions and what works well there. Mixing clay with the stone dust approximates sand. I would expect the smaller clay particles to be leached down through the sand and help bind the base together. If not, the clay could cause a dust problem during dry spells -- requiring watering to maintain a good surface footing and hold the dust down. Your arena probably works well for your area - enjoy it. /forums/images/graemlins/grin.gif
Merry Christmas!
Kip