My husband and I recently purchased a home that sits up on a hill in Western NY. We are now experiencing problems with our driveway which is developing deep ruts following heavy rains. The soil base appears to be clay like and the driveway is stone. A great deal of the stones have also been washed away at this point. The individual we hired was able to take out the ruts but informed us today that this would not hold up and we would continue to have this problem because of the driveway being on a hill. He suggested in the spring that we have rip rap put into the side of the hill (aprox 50 feet long) and then have someone cover the dirveway with millings. I have also had someone suggest that I cover the side of the hill with hay in an effort to get some type of seed growth (at this point the side of the hill has no ground cover and is again a clay like soil). I was told this would be more cost effective. Does anyone have any suggestions or knowledge about the estimated cost of doing this on a 100 foot driveway. Any help is appreciated.