FredH
Platinum Member
We use 3/4 crushed blue shale on our driveway which somewhat resembles yours , flat to start but goes to 14% grade for last 1/3 of 800+ foot driveway . As noted by others , to much rock without being compacted or rolled , Basically Sucks . Been there , Done That , Just Last Summer .
My blades are angled at 10 degrees with a pitch of 45 .

Old photo's of mine , before completion and after first test run . Added additional bracing , 3 point to back , etc... , just took these after first test before I got to far .
The only way I was able to correct wash boarding in one area that had never experienced problems before , was to scrape off maybe 1/2 a pick up load over about 100' length in trouble spot . Ended up being maybe actually 2 to 2 1/2 bucket loads on my TC 30 of rocked I scraped down and off drive . Problem has not returned since . Truck operator had no gate chains on his truck , thus when he was dumping / spreading and started up the hill , BOOM , rock went from 1.5" / 2" thick to almost 5" . My first passes moved a lot farther uphill , then I moved some all down to the end by highway . Regardless were I spread that other though , it jut ended up being to thick for that given area , So finally it went into the dirt on the side and no issue's since .
Fred H.
My blades are angled at 10 degrees with a pitch of 45 .


Old photo's of mine , before completion and after first test run . Added additional bracing , 3 point to back , etc... , just took these after first test before I got to far .
The only way I was able to correct wash boarding in one area that had never experienced problems before , was to scrape off maybe 1/2 a pick up load over about 100' length in trouble spot . Ended up being maybe actually 2 to 2 1/2 bucket loads on my TC 30 of rocked I scraped down and off drive . Problem has not returned since . Truck operator had no gate chains on his truck , thus when he was dumping / spreading and started up the hill , BOOM , rock went from 1.5" / 2" thick to almost 5" . My first passes moved a lot farther uphill , then I moved some all down to the end by highway . Regardless were I spread that other though , it jut ended up being to thick for that given area , So finally it went into the dirt on the side and no issue's since .
Fred H.