How to stabilize a 50 degree slope of rocks and fill?

[mardenm]

I had a similar dangerous hill that runs for about 120' across the back of my property. It is 40' wide that 12' off my house dropped with a 10' verticle like a ski slope. I ended up bringing in 18 truckloads of dirt fill. It was too steep to use my tractor until that raking that I rented a bulldozer the for 2 days.

It still has the dropoff, but is now a gradual hill.