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Shep, Thanks a million for the roadbuilding link! I've been looking for something like this, especially the part on culvert construction and pipe sizing. I'm in the process of building my own 800 foot road up and down hills through some valleys, stream crossings and woods and could use info like this. Dave, sounds like you build a super solid road, but honestly to undercut 3 whole foot the entire length of the road and then backfill with stone, CR-6 and cement dust would be incredibly expensive where I live. My 800' driveway would probably cost at least $50,000 (not including culverts) and probably alot more if I had to dig out 3 foot of fill and then pay for 3 foot of stone/CR-6/cement placement the whole way. I know ideally it would be nice to do it this way, and the road would probably be there longer than the Roman empire lasted. But if it basically lasts indefinitely with just a little maintenance every 4-5 years, I think that's not a bad compromise for an average homeowner. I was discussing driveway construction with one of my neighbors, and he said he had some soft spots that were really spongy. He didn't undercut them, he just had a few loads of recycled concrete with big chunks brought in and had it spread. This tightened everything up really good. Even after a good rain, he said 20 ton trucks roll right over it and it doesn't yield a bit. I think I may take this same tack. I'll remove the topsoil and obvious organics, but not significantly undercut. Then just keep adding however many loads of recycled concrete (which is much cheaper than crushed stone or CR6) it takes to make it ROCK hard. Then finish with crusher run and/or recycled asphalt, grade it with the proper slope, and roll to seal well. How long is your road? Do you have stone available on site or is it available cheaply where you are? Where I live nice stone and CR6 isn't "dirt cheap".
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