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There are plenty of good reasons to protect trees when building on previously undeveloped land. Healthy trees can shield a house from noise, block cold winter winds and hot summer sunlight, and make backyard recreational space more attractive. Strong, healthy trees also boost the value of a home or building lot, so preserving trees saves money that might otherwise be spent for landscaping. Given these benefits, it pays to put some effort into protecting what's already there. During excavation and grading, trees on the job site receive the worst treatment they will ever get. Specifically, it is the root system of trees that is most frequently injured by excavation equipment. The depth and spread of a