Project Case Study · Kent
How KD Restored an Asbestos-Contaminated Rising Main in Kent
When a critical rising main failed, KD Drainage & Asbestos managed a complex £120,000 programme combining licensed asbestos controls, CCTV investigation, tanker support, civil engineering and structural pipe rehabilitation.
£120,000 Project
3-Week Programme
175m UV Lining
Project at a Glance
A Complex Infrastructure Repair Delivered as One Programme.
A collapsed rising main, licensed asbestos contamination, temporary wastewater management, extensive investigation, civil engineering and structural rehabilitation all had to be coordinated within one controlled project.
£120k
Project Value
3
Week Programme
175m
UV Lining
14m
New Pipework
300–340mm
Pipe Diameter
The Challenge
A Failed Rising Main With an Added Asbestos Complication.
When critical drainage infrastructure fails, responding quickly is only part of the solution. The underlying cause must be identified, risks controlled and the correct repair delivered with minimal disruption.
This was the challenge facing Cappagh Browne following the collapse of a rising main in Kent.
The discovery of licensed asbestos-containing materials made the project considerably more complex. Standard drainage repairs had to be suspended while specialist controls were established.
KD Drainage & Asbestos coordinated asbestos remediation, drainage investigation, tanker operations, excavation, civil engineering and structural pipe rehabilitation within one project.
Integrated Delivery
One Contractor. One Programme. One Point of Responsibility.
The key to delivering the project efficiently was coordinating specialist disciplines rather than treating asbestos, drainage, tankering, civil engineering and structural rehabilitation as unrelated packages.
Licensed Asbestos Remediation
Controlling the Hazard Before Drainage Work Could Continue.
Once asbestos-containing material had been identified, the affected area required specialist control before normal drainage repair activity could proceed safely.
The asbestos phase incorporated controlled working arrangements appropriate to the licensed material, including enclosure, negative-pressure controls and decontamination procedures.
Independent monitoring and clearance formed part of the process before subsequent repair activities could progress.
Having drainage and asbestos expertise coordinated within the same project helped maintain continuity between remediation and infrastructure repair.
Investigation & Planning
Understanding the Damage Before Choosing the Repair.
Once the site was controlled, KD could investigate the rising main properly and build a repair strategy around the actual condition of the pipework.
01 — Survey
CCTV Investigation
The pipeline was inspected internally to establish condition and identify the extent of structural failure.
02 — Assess
Structural Defects
Investigation identified significant deterioration including crown collapse, voids and pitted cast-iron sections.
03 — Maintain Flow
Tanker & Over-Pumping
Temporary tanker and over-pumping arrangements supported the site while affected sections were unavailable.
04 — Repair
Rehabilitate & Replace
The final solution combined trenchless structural lining with new high-pressure pipework where replacement was required.
Structural Rehabilitation
175m
of UV-cured structural lining.
Installed through pipework ranging from approximately 300mm to 340mm in diameter.
UV Structural Lining
Rebuilding the Existing Main From the Inside.
Where excavation of the entire rising main was unnecessary, structural lining provided a way to rehabilitate long sections of damaged pipework without replacing every metre conventionally.
Approximately 175 metres of the existing main were rehabilitated using UV-cured lining technology.
Once positioned within the host pipe, the structural liner was cured to create a new pipe within the existing pipeline, restoring structural integrity across the rehabilitated sections.
Using rehabilitation alongside targeted replacement allowed the repair method to be matched to the actual condition of each section.
Civil Engineering & Replacement
Where Lining Wasn’t the Right Answer, New Pipework Went In.
Some defects required conventional civil-engineering intervention rather than rehabilitation alone.
KD installed approximately 14 metres of new 300mm high-pressure pipework as part of the programme.
The work required excavation, preparation of affected sections, installation of replacement pipeline and integration with the repaired rising main.
Combining targeted replacement with structural lining produced a repair strategy based on engineering need rather than applying one repair method everywhere.
New Infrastructure
14m
of new 300mm pipework.
Targeted replacement where existing sections could not simply be rehabilitated.
Keeping the Site Operational
Tanker Operations & Temporary Flow Management.
Repairing a critical rising main is not simply a case of isolating the pipe and starting work. Wastewater still has to be managed while sections of infrastructure are unavailable.
Tanker and over-pumping operations formed an important part of the programme, allowing flows to be managed while investigation, remediation and repair progressed.
The result was a programme designed around maintaining control of the system throughout the works.
The Result
A High-Risk Failure Converted Into a Coordinated Repair Programme.
By coordinating asbestos control, investigation, temporary wastewater management, civil engineering and trenchless rehabilitation, KD delivered the complete project within a three-week programme.
Risk Managed
Licensed Asbestos Controls
Specialist controls allowed drainage repair work to proceed safely after the asbestos risk had been addressed.
Infrastructure Restored
Rehabilitation + Replacement
175m of structural lining combined with new high-pressure pipework where targeted replacement was required.
Programme Delivered
Three Weeks
Multiple specialist disciplines coordinated within one controlled project programme.
Why Integrated Capability Matters
Complex Drainage Failures Rarely Involve Just One Problem.
The rising main could not be investigated fully until the asbestos risk was controlled. Repair work could not proceed without wastewater flows being managed. And the final engineering solution required both trenchless rehabilitation and conventional civil works.
KD’s ability to coordinate those requirements created one programme with clear responsibility from initial response through to completion.
Integrated Services
One coordinated programme included:
✓ Licensed asbestos remediation
✓ CCTV drainage investigation
✓ Tanker operations
✓ Over-pumping
✓ Excavation & civil engineering
✓ UV structural lining
✓ New high-pressure pipework
Project FAQs
Frequently Asked Questions.
What caused the rising main project to become so complex?
The pipeline had suffered significant structural damage and the discovery of licensed asbestos-containing material meant specialist controls were required before normal drainage repair work could proceed.
How much of the rising main was structurally lined?
Approximately 175 metres of pipework, with diameters in the region of 300mm to 340mm, were rehabilitated using UV-cured lining.
Was all of the damaged pipework relined?
No. The repair strategy combined structural rehabilitation with targeted conventional replacement where the condition of the existing main required it.
How much new pipework was installed?
Approximately 14 metres of new 300mm high-pressure pipework were installed as part of the civil engineering works.
Why were tankers and over-pumping required?
Wastewater still had to be managed while affected sections of the rising main were unavailable, so temporary tanker and pumping arrangements formed part of the programme.
How long did the complete project take?
The coordinated programme was delivered over approximately three weeks.
Related KD Services
Specialist Services Used Across Complex Drainage Projects.
CCTV Drain Surveys
Internal inspection to establish condition, defects and repair requirements.
Drain Relining
Trenchless structural rehabilitation for damaged underground pipework.
Drain Repairs
Repair and replacement where existing infrastructure requires conventional remedial work.
Combination Tankers
Jetting, suction and wastewater support for complex drainage works.
Pipework Replacement
Renewal of underground infrastructure where local repair is not sufficient.
Commercial Tendering
Specialist drainage support for larger commercial and infrastructure projects.
Complex Drainage Projects
Need One Contractor to Manage a Complex Drainage Problem?
KD Drainage supports commercial organisations and contractors with investigation, tankering, civil engineering, pipe rehabilitation and specialist drainage works.
Speak to our team about planned works, emergency infrastructure failures or drainage tender requirements.
Talk to KD Drainage
Discuss your drainage project.
01622 919012
info@kddaa.co.uk
