Confined Space Point Cloud Survey of Clean Water Sump in Kent Using Elios 3
When working with complex, narrow, or restricted infrastructure, particularly in the water sector, the ability to capture accurate spatial data safely and efficiently is critical. DJM Aerial Solutions recently undertook an internal point cloud survey of a clean water sump system in Kent using the Elios 3 confined space drone, delivering highly accurate LiDAR data in under ten minutes — without requiring any manned entry.
The Challenge: No Drawings, Complex Geometry, and Confined Access
The client, responsible for a clean water infrastructure asset in Kent, required accurate spatial data of a vertical sump system with the following characteristics:
Approx. 1 metre wide internal space
Tall vertical geometry
Multiple horizontal reinforced concrete supports
No existing as-built drawings
This presented a logistical challenge — not only was there no internal access data for maintenance planning, but the tank’s design made traditional survey methods time-consuming, risky, and potentially incomplete.
Our Solution: Internal 3D Modelling Using Elios 3
Rather than rely on legacy access techniques or handheld scanning equipment, DJM Aerial Solutions deployed the Elios 3, a collision-tolerant confined space drone equipped with an onboard LiDAR sensor.
Within minutes, we:
Entered the clean water sump safely
Captured the entire internal geometry as a point cloud
Delivered a full LAS dataset suitable for integration into CAD or BIM workflows
Avoided any human entry or scaffolding requirements
Total flight time: 10 minutes.
Processing and delivery time: under 48 hours.
Why Use Elios 3 for Sump and Tank Surveys?
| Benefit | Details |
|---|---|
| Non-entry access | No confined space permits or entry needed |
| Rapid deployment | Survey completed in minutes, not days |
| Full spatial capture | LiDAR data provides a measurable 3D model |
| No disruption | Asset remains undisturbed, no need for entry points or invasive equipment |
| Safe and repeatable | No risk to personnel, suitable for routine or emergency inspection |
Alternative Methods: Time-Consuming and Invasive
Had the Elios 3 not been deployed, the only viable alternative would have been:
A manned entry into the clean water tank
Use of multiple laser scanning instruments placed at various levels
Scaffold or rope access setup to capture high and low points
Significant time on site, likely multiple days
Risk of data distortion due to access limitations or occlusion from structural elements
This approach would not only have increased cost and downtime but could also have introduced health and safety concerns due to the confined environment.
Deliverables and Integration
The LAS point cloud model we delivered can be:
Imported into AutoCAD, Revit, or Civil 3D
Used for reverse engineering and digital twin creation
Referenced for repair planning, pipe routing, or structural modifications
Aligned with topographical or GPR data for full asset mapping
We also offer integration of these internal scans with topographic surveys, allowing for seamless overlay of above-ground and subsurface features.
Ideal Applications for Elios 3 in Water Infrastructure
This project in Kent highlights a growing use case for confined space drone technology in water infrastructure. Applications include:
Clean water sump and tank surveys
Stormwater attenuation systems
Sewer and culvert inspections
Wastewater treatment chambers
Pumping station assessments
Reservoir and asset mapping for water utilities
Frequently Asked Questions About Drone Surveys
It’s a non-entry inspection method using drones to access hazardous or enclosed spaces like tanks, sumps, and culverts without putting personnel at risk.
We used the Elios 3, a confined space drone with an onboard LiDAR sensor and high-resolution camera system.
The internal survey was completed in under 10 minutes, compared to days using traditional methods.
We provided a full LAS point cloud, compatible with AutoCAD, Revit, and other modelling platforms.
The sump was narrow, tall, and included multiple horizontal reinforced concrete supports, making conventional access and scanning highly difficult.
Absolutely. Our outputs include annotated video, imagery, and point clouds for technical review by plant engineers and OEMs.
Traditional scanners would require manned entry, complex setups at multiple elevations, and days of effort, increasing cost and risk.
Yes. It is safe for use in clean environments where contact is minimal and no contamination occurs.
Absolutely. It is ideal for clean and wastewater tanks, culverts, pumping stations, and other confined infrastructure.
Yes. While clean water tanks have specific hygiene protocols, drone entry avoids the contamination risks posed by personnel or equipment.
Yes. Alongside LiDAR data, the Elios 3 captures high-quality stabilised video and stills for visual condition surveys.
Conclusion: The Safer, Smarter Way to Survey Confined Water Assets
This clean water sump survey clearly demonstrates how Elios 3 confined space drone surveys offer a faster, safer, and more accurate alternative to traditional inspection and modelling techniques. With no scaffolding, no manned entry, and rapid deployment, asset managers can make informed decisions without unnecessary cost or risk.
If you’re managing water infrastructure without accurate spatial data, we can help.
Ready to Survey Your Confined Space Water Asset?
DJM Aerial Solutions delivers confined space surveys across the UK, using state-of-the-art drone platforms to support engineering, asset integrity, and water utility clients.
Fully CAA-approved
Confined-space trained
High-resolution LiDAR and photogrammetry capability
Nationwide deployment
Get in touch today to arrange your internal drone survey.