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Why Old Utility Drawings Are a Starting Point, Not a Complete Locate

Modern white house with herringbone paver driveway, green front lawn with paint markings, and white mailbox labeled 401.

A set of utility drawings from permit records or an as-built file is often the first thing a project team reaches for before excavation. Those records have real value, but they represent a snapshot of what was recorded at one point in time, not a verified picture of what is underground today.

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★★★★★August 2026

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★★★★★August 2026

​GPR Bros delivered top-tier service! 811 only marks public utilities, so we hired GPR Bros for private locating before excavating. Their tech arrived on time, used advanced GPR equipment, and precisely mapped out all underground utilities on-site. Fast, accurate, and professional—they saved us from costly line damage. Highly recommend!

★★★★★August 2026

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