A GPRS Case Study

Protecting College Campus’ Wastewater Infrastructure During Excavation

Protecting College Campus’ Wastewater Infrastructure During Excavation

Highlights

THE BIG IDEA

GPRS paired specialized equipment with our industry-leading sewer pipe inspection process to locate a sewer line hidden 40 feet below the campus of the 124-year-old Carnegie Mellon University and ensure the safe installation of a foundation for a new building.

INDUSTRY

SERVICE

LOCATION

PM Insight

Deliverables

PROJECT APPLICATION

TASK

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Task

PROBLEM

  • Existing as-built documentation indicated that a sewer line ran through the planned location for the new building’s foundation, but the contractor had not been able to locate the line themselves
  • The sondes (instrument probes) built into GPRS’ sewer inspection rovers can only locate sewer lines up to 15 feet deep
  • Due to the hilly conditions on campus, the sewer line was presumed to be located deeper than normal

Solution

  • GPRS Project Manager deployed a Prototek Durasonde ‘super sonde’ Transmitter, which is locatable in nonmetallic pipes over 50 feet in depth
  • Sewer pipe was located, and location and depth were marked on the surface using spray paint, so project team knew where they could and could not dig
  • Data was uploaded into SiteMap® to document sewer line’s location for future O&M purposes

Benefits

  • GPRS helped prevent subsurface damage that could have otherwise derailed the project and led to service interruptions
  • Documentation of the line’s location and depth in SiteMap® will streamline future O&M

CASE STUDY GALLERY

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“Our team was more effective and efficient because of SiteMap, allowing us to provide better results from more informed decision-making.”
Alexander Valigosky
Project Environmental Scientist

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