Crossbore

HOW CROSS BORES HAPPEN

For many years, utilities nationwide have
installed gas pipelines by boring underground,
rather than digging trenches, to avoid tearing
up paving and landscaping.
Existing underground pipes and wires are
marked, when possible, before work begins. But
sewer pipes often go unnoticed because they
are regularly unmapped and are undetectable
using above-ground locating devices.
Crossbores are a rare side effect that can happen
when the machine used to install gas pipelines
inadvertently bores through sewer lines.