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Johnston General Engineering is a construction company located in Napa, California, specializing in excavating, grading, and underground utility construction. We proudly serve contractors, property owners, and wineries throughout Napa and Sonoma County, offering a comprehensive range of site work services, including brush removal, land clearing, earthwork, and drainage infrastructure construction. Fire protection is a vital service we provide; we construct water tank pads, install underground piping, and set up fire hydrants and fire apparatus to ensure safety. With our extensive experience and resources, Johnston General Engineering guarantees that every project is completed correctly and efficiently.