Wen:
First of all, If the guy drives a flashy color chevy 1 ton with the "Hot" stuff....BEWARE! The ride is rough, the material is junk.
No sir, I shut the excavation side of my company down over a year ago. I still have a lot of the equipment and, 90% of it is For Sale./w3tcompact/icons/smile.gif
On some new property my wife and I purchased a few years back, we were faced with the same problem, just not as severe as your son's sounds. I had a 5000 sq. foot shop built on the property and had to have a good drive to access it (in any weather condition). I used the clay base method I spoke of and then topped it with aprox 6" of #2 base material. the drive is 12' wide and aprox. 1000 feet in total length, also constructed a 30' wide entrance, in a ditch that was about 4 1/2 feet deep and, 14' wide, wherein I installed an 18"x 32' culvert pipe. It took a great deal of material to construct all of the above. (somewhere around 500 tons). The drive has now been in heavy service for 4 years, and has only required maintance (blade work) one time. The pulverized hot top that has been mentioned works well for an under layment. but can be very difficult to maintain as a surface material. If you choose this method, have a good dozer operator do the finish work. any chunks that are in it can be broken up by the dozer. The best use I have found for it is, filler around a culvert pipe then topped with a quality material. Vulcan sells this stuff (if they have any) for about 2.00 a ton (thats an old price est.) plus trucking.and it does have a lower dust factor than base in most cases.
If you would like for me to, I would be glad to meet with you and your son and look at the site. We can set up the T.- level and check out the grades, I can make some suggestions and point you in a, "whats worked for me" direction.
I have built or re-built several miles of drives over the years and, no one method applies to the same task. Whatever your decision. a big beefy crown is the first step to having a near maintance free driveway, unfortunately, a maintance free is expensive in the beginning.
Drop me an e-mail if I can be of assistance.
Thanks
Cowboy
BigBoyz Toyz