steep hill digging

the company i work for is bidding on a 7 mile 12" cross country type waterline in the hills of northern calif. my super asked me whats the steepest hill i've dug down. i told him they have all been engineered cut or fill slopes. usually the steepest has been 2:1's. i don't think iv'e ever tried to work on something steeper. he tells me this waterline job is all original ground, kinda rocky and has hills of 1:1 and 1&1/2:1 slopes. i said in my experience a komatsu 300 or 400 sized machine...

steep hill digging

steep hill digging