Evergreen Geotechnical is based out of 150 Mile House and works in the Williams Lake Area. EGI was formed in 2003 by Robert Wilson, P.Eng., P.Geo. EGI works with Industry, Government, First Nations and the Private sector on Geotechnical solving geotechnical engineering issues such as road and subdivision development, retaining walls, landslide assessments, earth structures like dams and embankment construction along with general consulting issues.