Skip to main content
Drone flying through underground tunnel

A sewer inspection service that delivers decision-ready data, not risk

Sending people underground can be unsafe, slow or impractical. We send drones and robotic crawlers in instead, capturing the 2D and 3D data your team needs to grade defects and determine if and what action is required.

All the evidence, none of the exposure.

Who Inspection Services Are For

Water utilities and infrastructure operators

Teams responsible for the condition, maintenance and long-term planning of sewer and underground networks, where direct access is difficult, unsafe, or simply impractical at scale.

Benefits

Value For You Today

No personnel exposure during sewer and confined-space surveys

Reliable 2D and 3D data, even from degraded, hard-to-reach assets

Pinpoint and grade defects to prioritise remedial works with confidence

Long-Term Value

A permanent digital record for future review without returning underground

Track deterioration and changes over time with repeat surveys

Use condition trends to plan future maintenance and capital works

What We Deliver

IMAGE DATA

420k+ Survey Photos Taken

Every survey includes high-resolution stills, so your team can zoom in on the fine detail of a specific defect whenever they need a sharp, precise reference.

VIDEO DATA

40+ Hours of Video Recorded

Every survey includes a complete video record, full visual evidence of hazardous assets, captured by drone or robotic crawler without anyone needing to go in.

3D DATA

1k+ Point Clouds Generated

Every survey delivers a digital twin, measurable 3D data your team can use to extract distances, volumes and defect dimensions.

Trusted by operators and inspection partners

Good Friday Robotics

"Subterranean has really helped us to achieve predictable and controllable flights in really tough conditions"

Environmental Techniques

"Subterranean provides us with accurate survey data that has enabled us to deliver a reliable inspection service for our customers"

Uisce Éireann

"Subterranean enables us to understand the condition of our Victorian-era sewer system so we can deliver reliable services for our customers"