Before an underground construction project begins, knowing exactly what’s beneath the surface is essential. Utility potholing, also called daylighting, is the process of creating small, precisely targeted excavations to visually confirm the location, depth and condition of buried utility lines.
Why Potholing is a Pre-Excavation Best Practice
Comprehensive pipeline assessment solutions tailored to your infrastructure needs
Assess pipeline condition before commencing work to identify issues and plan accordingly
Verify inspection under development to compliance and integrity standards
View documentation and detailed reports for your records and compliance
Underground utility maps are often outdated or imprecise. Lines shift over time due to soil settlement and older installations may not appear on any record at all. In the dense urban and suburban environments of Santa Clara County and San Mateo County—where decades of development have layered gas, water, sewer, electrical, telecommunications and fiber optic lines beneath streets, sidewalks and private property—assumptions about what’s underground can prove expensive or even dangerous.
Potholing provides definitive answers. A small test excavation reveals the exact horizontal position, depth and type of each utility along with any visible damage. This information allows contractors to plan excavation routes, boring operations and foundation work with confidence.
Modern potholing typically relies on hydro excavation, which combines high-pressure water with powerful vacuum extraction. Pressurized water loosens soil while a vacuum system simultaneously removes the resulting slurry into a containment tank. This non-mechanical approach virtually eliminates the risk of striking and damaging buried utilities—a significant concern when using backhoes or even hand tools near electrical lines.
Hydro excavation works effectively in varied soil conditions, from the clay soils common in many San Mateo, Alameda and Santa Clara County communities. The process can also be performed on compacted or challenging ground using heated water when conditions require it.
Virtually eliminates risk of damaging buried utilities
State-of-the-art technology for accurate diagnostics
Our inspections are conducted in accordance with the National Association of Sewer Service Companies (NASSCO) Pipeline Assessment Certification Program (PACP™). This ensures consistent, industry-standard evaluations and enables straightforward comparison with past inspections. Our certified operators use the latest technologies and methodologies so you can count on accurate, reliable assessments.
Common Applications
Residential and commercial projects throughout Silicon Valley that benefit from utility potholing
Knowing precisely where gas, water and electrical services run prevents the possibility of a ruptured line—and the service outages, repair costs and liability that follow.
For contractors working on tight schedules, potholing reduces the risk of project delays caused by unexpected utility strikes.
Comprehensive documentation for complete transparency and compliance
Detailed Video Footage
High-quality digital video appurtenance
PACP™ Reports
Industry-standard inspection observations
Defect Summaries
Clear and precise findings snapshots
Recommendations
Expert guidance for repairs and maintenance
Striking a gas line can endanger lives. Rupturing a water main can flood excavations and disrupt service to surrounding properties. Severing fiber optic cables can trigger business interruptions affecting operations far beyond the immediate project site.
The repair costs, liability exposure and project delays that follow a utility strike routinely exceed the investment in proper potholing by a wide margin.
Potholing Services in the Bay Area
TrenchFree provides hydro excavation and utility potholing throughout Santa Clara County, Alameda County and San Mateo County, serving homeowners, contractors and commercial property owners from Palo Alto and Redwood City, Fremont to San Jose and Morgan Hill.
TrenchFree’s skilled crews work with the underground infrastructure common to southern Bay Area communities—including aging pipes, dense utility corridors and the mix of residential, commercial and industrial development found throughout Silicon Valley.
Contact us today to schedule your potholing inspection and request a detailed assessment of your infrastructure needs.
