No I do not. I worked for the highway commission in Iowa for a time. We ran a new 2 lane state highway in the back of a lake. The engineer put a 10 foot over burden of dirt on the right of way for a year on the area where the lake was. Then it was paved. Road bed sank over a inch in the first 3 years. Engineer said should have waited another year. Gravel is a pain in the ass agreed. Water a lot and wait another year. Just my opinion.