Ready to Excavate? MAKE SURE YOU HIRE AN EXPERIENCED EXCAVATING CONTRACTOR IN SOUTH LYON, MI D&T Excavating and Construction provides a wide variety of construction and pre-construction services in the South Lyon, MI area. With over 20 years of land prep experience, you can trust our excavating contractor to clear and grade your property. We have the equipment and experience needed to remove vegetation, slope lots and install retaining walls. If you need a seawall or dock built, we can do that, too.