Penryn sewer replacement

Works happening on Commercial Road

The situation

Across the South West our sewerage system is showing its age and needs upgrading. This is especially true of the sewer running from the pumping station in Penryn. Following a number of bursts in the past few years, it's reached the end of its working life and needs replacing.

Recent upgrades to the pumping station and this replacement of the main will add resilience to the network and reduce the risk of pollution.

Works taking place

We have made the decision to reschedule the works in Commercial Road. We are currently reviewing the timeline, and it is unlikely that we will be undertaking any further upgrades until after the streets works embargo period. 
This means subject to weather conditions we will be back no earlier than October 2026.

 

Completed works

New mains installation: March 2024

Stage 1: Commercial Road to Falmouth Road

New mains installation, completed between January and February 2024.

Stage 2: Eastwood Road at junction of Falmouth Road

Image of traffic light
Stages of open cut excavation
1/5

1. Preparation

  1. Set up traffic management and safety barriers
  2. Survey the site and mark up the existing services – we do not want to damage other utilities!
Working making repairs in the road
Stages of open cut excavation
2/5

2. Digging down

We excavate down to the correct depth, creating a trench for the new pipe. We use diggers for most of the work, but areas around other services have to be dug out by hand to avoid damage.

Picture of works to separate sewers
Stages of open cut excavations
3/5

3. Installing the pipe

  1. The new pipe is installed on suitable bedding to protect it
  2. It is then pressure tested to ensure it doesn't leak
2 workers wearing hard hats and hi vis jackets by roadwork signs
Stages of open cut excavation
4/5

4. Introduce flow into sewer

The new pipe is connected into the network and the sewer is brought into service.

Water leak in road
Stages of open cut excavation
5/5

5. Restore the working area

We backfill the trench with stone, restore the road surface and repaint any road markings before clearing the site and then the road is opened again as normal.