driveway culvert width? Highway tractor + 53' trailer

After you have your base and it is compacted, top it with some crushed asphalt. Talk about smooooooth

 

I put down 40 tons on #1 reclaimed from a well site and then added another 10 tons beside my entrance and let it pack. Topped with 20 tons of 304 which made it like a concrete pad. I still have about a ton or two of 304s. To top any spots or add a little more after entrance settles.

 

If you have that heavy black soil, probably #2's, then some #4's. Then top it with dense grade road base(or as some of the dirt guys call it, pug). Has fines, dust, 57's,67's, 2"etc. Gets damp and rolled over, tight as concrete. All gonna depend on what ya got underneath.

 

Lime stabilize It first. Blade off top soil, lime, then 2's and top with CA6. If you can, you could try to get millings. Sometimes places darn near give it away. But no matter what, lime first will give you a strong base so your rock, whatever size you use, doesn't "disappear". Spend a little more upfront, and save the time and money fixing it later over the long term. Actually, see what it would cost to have it oiled and chipped. That's what we did at the farm, it's a lot nicer than just rocking it.

 

You want road base. Go with 6-8" of compaction. That is what the county requires here but they also require 2 80# bags of cement mixed in per every yard of material. This setup makes the stuff #### near as hard as a 4" slab. But 1 bag per yard will still yield good results and I dount you would have any issue with it.

 

@rollin coal
Just make shure that at the point where the trailerwheels make the shortest part off the turn (which would be around where you planned the culvert) there reinforce it .
In a wet periode that area will be under most strain.

 

30' in summer becomes 20' with winter snow plowed.

 

That's typically not an issue in TN

 

Sounds like fun.