I have a potential job in which I'm honestly still deciding if I even want to bid on. The best way to describe it is through the picture that's attached. It would in a nutshell be replacing the wood retaining wall that is currently in place with a SRW. The homeowner would like to utilize Techo's creta for this. My immediate thoughts were semma or suprema. The wall is approximately 90 lineal feet in length and has an exposed height of approximately 30 inches at its highest point. My thoughts were to build a 4' high wall burying approximately 2' of that height. As you can tell in the pic there are lots of trees to contend with. What happens if during excavation I hit one of those oaks roots...overdig yes...but what happens to an 80' tree that I'm tearing out its uphill roots? My other concern would be in the soil, or lackthereof. This area is extremely rocky, its basically on a mountainside. How do I account for all of the costs associated with this. I think my "clauses" are going to wind up being more expensive than the project itself! Anyhow, I'm looking for advice, feedback, opinions and a little bit of an outsiders perspective and how you may or may not approach this. Once again, thx.