A hidden treasure located outside of Forest, Ontario, lies Birnam Excavating Ltd. A company with almost 40 years of proven quality construction experience serving Southwestern Ontario. The Birnam Team has worked with many Engineers, Consultants, Developers and Farmers to come up with innovative solutions and cost effective methods to handle various construction projects. While our mainstay is in civil engineering projects, mainly sewer, watermain and road reconstruction, over the years Birnam has completed excavating projects of all types. Quality and Service. A tradition since 1973 Serving Forest, Warwick Township, Sarnia Lambton, Huron, Elgin, Middlesex County and Southwestern Ontario more... See more text