You want to make sure you have a good base down. That is removing the sode, and going down about a foot. I'm not sure what 23A's are, but I've always called it "ballast" for a base. That is the stone that is between golf ball, and tennis ball size. You want that down while they are building your house if they are in the process right now. That way, the trucks can run in and out on it to pack it down tight.
If per chance that the house is completed, and this is a new drive that you are cutting in, go down about 8"-12". Forget the ballast, but put some geo-textile, weed guard, whatever one wants to call it, down. Then start putting some #58 Crushed stone down in layers.....wetting and running the plate compactor over it on each layer. The tighter you can get the stone the better. Also when you order the stone, ask if they can put some extra "fines" in with it, or extra stone dust. This will help with compaction. # 58 stone is roughly 5/8" in size. And make sure you use "crushed" stone and not creek run stone. Creek run will not compact and will roll on you every time you turn your steering wheel. Creek run is round stone, and crushed stone locks together.
Crushed Limestone is the ideal stone as it gives you the light gray color. But in some areas, and if you are lucky enough to have a brick manufacturer close, you can get crushed brick. It really looks nice. Or if you have a concrete block factory close, ask if they have crushed blocks. Those will really pack tight.
We have a place to get crushed limestone, but they also carry a white crushed limestone. The white looks nice the first year, and packs down SUPER tight, but the dust in it goes everywhere. It sticks to your tires, to your shoes, you get it in your vehicles from it sticking to your shoes, and anywhere else you walk. A few years back they were selling the heck out of it around here because it was different looking, but since then, everyone has went back to the light gray all due to it being cleaner than the white.
One other thing....I don't know how you feel about chemicals, but you can use a good all vegetation killer before you put down any stone. Dig your sod and dirt out first. Then if you use a weed guard, before putting it down, spray where the drive is going with a good all vegetation killer. NOT Roundup. If you have a Farm Store around, get a vegetation killer that the farmers use, or you can get some Pramitol and mix it with some diesel fuel, spray things with it, and it will sterilize the ground sprayed for up to two years. Then go ahead with all of your weed guard and stone
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. See my post for the on going saga of my battle to reclaim a poorly made driveway. AndI would go with the fabric under the rocks.
