I had a retaining wall installed by a contractor. Now I need to bring in dirt and install sod. Problem arises with bringing in dirt. Can not bring in through drive way may crack clients cement. Can bring in through street but may crack cement (city owned). What are my options? Also, originally I did not recognize that with all the dirt I am bringing in I may need to extend the retaining wall to secure the dirt. This may add an extra 6k to the job. I am looking at other options. How do I approach the client and tell them I missed a possible problem, you will need to add an additional wall which will cost roughly six more grand? Help couldnt sleep last night trying to figure alternatives to get job done.