Resources
Guides for the people who open the ground.
Plain answers on 811, GPR, soil, and what a damage-prevention record should hold.
Guides
811 marks, GPR surveys, and dig-point verification: what each one tells youThree different answers to the same question, and why a crew needs all three.
Can ground penetrating radar detect plastic and PVC pipe?Yes, and here is what decides whether it will on your site.
Why GPR loses depth in clay and wet soil, and how progressive scanning gets around itDepth is set by the ground, not the radar. Here is the fix.
How to verify buried utilities before you digA step-by-step guide to the pre-dig process: 811, locating, surveys, and the final check at the dig point.
What fully polarimetric GPR means, in plain termsWhy two polarizations see what one misses, and why it matters for utilities.