Welcome to HLW Excavation. We're a local excavation company based in Merrimack, NH and serving surrounding areas. We can help dig the space you need to install a foundation, drainage system or septic system. We can also install high-quality GGT Footing for your western-style horse arena. Our owner started training horses in his 20s and has extensive knowledge about land grading for your arena dirt. We'll work diligently to make sure you get a significant return on your investment.