Rising Main Repairs
Project Overview
Civils and Environmental were appointed to complete long-awaited repairs to a failed rising main in Dartford, England.
The rising main served a pumped sewer system that travelled uphill before discharging into a gravity-fed drainage network. The pipework route crossed:
Council-owned land
Private land
Road-adjacent areas with public access
The client had experienced ongoing issues with the line for several years. Due to prolonged delays and unresolved responsibility between stakeholders, the client elected to proceed with the works independently and pursue cost recovery separately.
Our role was to safely identify, expose, and repair multiple defects on a pressurised sewer line while managing complex stakeholder coordination and working in proximity to existing utilities.
Key Challenges
Pressurised rising main operating under load
Pipe route crossing multiple land ownership boundaries
Works required on council-controlled land
Utilities present adjacent to the line
Public safety considerations near the highway
Long-standing unresolved infrastructure issues
This was not simply a repair — it required structured engineering management and coordinated permissions.
Stakeholder Liaison & Permitting
Before works could begin, we coordinated with:
The client
The local council
Private landowners
This included obtaining:
Access permissions
Site-specific approvals
Safe working agreements
Traffic and public interface considerations
Temporary site fencing, welfare facilities, and vehicle protection measures were installed to ensure works could proceed safely on council land.
Investigation & Fault Identification
Due to the pressurised nature of the line, accurate fault identification was critical.
Our methodology included:
CCTV survey investigation
Pipe probing and tracing
Surface marking
Utility scanning (CAT scan)
This allowed us to precisely locate defective sections before excavation, minimising disruption and unnecessary ground disturbance.
Controlled Excavation & Utility Protection
Utilities were located in close proximity to the rising main. Excavation was therefore undertaken using:
Mechanical excavation with controlled depth
Hand digging near known services
Careful trench management
This ensured surrounding water, gas, electrical, and telecoms infrastructure remained undamaged.
Pressurised Rising Main Repairs
The line travelled uphill before connecting into a gravity drainage system. Repairs included:
Installation of pressure-rated repair sections
Replacement of defective pipe segments
Installation of approved mechanical couplings
Secure fitting of pressure-rated components
Given the operational nature of the system, components were installed to ensure long-term performance under pressure.
Testing, Reinstatement & Handover
Following installation:
Flow into the gravity system was verified
Joints and fittings were inspected
Excavations were backfilled and compacted
Surfaces reinstated appropriately
Works on council-controlled land were completed with careful reinstatement and removal of all temporary site measures.
The rising main was restored to full operational functionality.
Outcome
✔ Rising main fully operational
✔ Pressurised sewer system restored
✔ Multiple defects resolved
✔ Public and stakeholder safety maintained
✔ Controlled excavation with no utility damage
✔ Professional documentation supporting client cost recovery
After years of delay, the client now has a fully functioning and reliable drainage system.
Why This Project Matters
Rising mains crossing mixed land ownership often become stalled due to unclear responsibility and coordination challenges.
This project demonstrates:
Technical capability in pressurised sewer repair
Experience working on council and private land
Strong stakeholder coordination
Safe utility management
Professional civil engineering standards
Civils and Environmental deliver complex drainage infrastructure solutions where engineering expertise and structured management are equally critical.
Image of site completion after regarding the area:
