Utility Locating at Power Plant for New Security Fencing

Nuclear plant security fencing is governed by strict federal regulations. The planned new security barrier required installing fence posts using an auger, a high risk activity without accurate subsurface utility data.

Complicating factors included:

• Extensive private utilities not marked by 811
• The presence of high voltage electrical, water, and storm sewer lines
• The need to maintain plant security and operational continuity throughout the project

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GPRS deployed advanced locating technologies, as part of the Subsurface Investigation Methodology process (SIM), including:

• Ground Penetrating Radar (GPR)
• Electromagnetic (EM) pipe and cable locating

GPRS identified both metallic and non-metallic utility lines, including high voltage lines, enabling accurate subsurface mapping. All utilities were clearly marked on the surface using paint, flags, and appropriate indicators.

All findings were collected via GPS and delivered through SiteMap^®, GPRS’ GIS platform, providing:

• CAD and PDF utility maps
• KMZ and SHP file exports
• Full digital map viewer access for collaboration and project coordination

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The client relied on GPRS to deliver precise, field‑validated utility locations and digital maps, ensuring safe excavation and installation.

• GPRS SIM certified, security cleared Project Managers, performed consistent, high quality locating in a sensitive environment
• Accurate, field validated utility data helped the client eliminate guesswork and reduce the risk of strikes during excavation
• Centralized, digital utility maps in SiteMap foster seamless communication and collaboration across the project team

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