This week we examined three fir trees that sustained root damage due to excavation for a drainage ditch. The photo shows a major 4" critical root that has been badly severed. While underground utilities are necessary to maintain our health and safety, it is always wise to put up tree protection fencing or have an arborist on site during excavation projects near trees. If cutting roots is necessary for the project, an arborist can ensure the cuts are made properly to give the tree the best chance at retaining vigor in the future.