The route section for Trenchless Crossing 017/018 runs parallel to the railway line, behind West Heath Road, under Stake Lane, Prospect Road and beneath the allotments.
This summer, when undertaking the E-Power drill, the drill had a technical failure.
The E-Power drill is pushed through the ground to allow the drill head to operate. The pressure needed to push the drill increased significantly above the expected levels, reaching the limit of design of the machine.
We can no longer undertake this trenchless crossing as a combined drill, because the only trenchless method available that complies with the Network Rail standards, is micro tunnelling.
Due to the nature of micro tunnelling, this method wouldn’t be practicable to extend over
500m to complete installation as one section and cannot be undertaken in shorter sections within the space of the Order Limits.
We will now be using open cut installation to install both sections.
Within Queen Elizabeth Park we will be keeping Cabrol Road car park closed until installation between the park and Prospect Road is complete. Compound 4AD off West Heath Road will remain in operation to service works.
These plans are subject to further approvals from Rushmoor Borough Council and others. This includes amendments to the Queen Elizabeth Park Site Specific Plan.
We will be in contact with all landowners and local residents directly impacted by this change in installation method.
This section will now be undertaken as an open cut installation and runs from the east of Cove Brook, along the railway line to Stake Lane. The section is approximately 300m long in total.
Compound 4AD off West Heath Road will be used to support these works.
We are looking at narrow working installation techniques to see if we can avoid undertaking works within private gardens. If we need to work within private gardens, we will discuss this with the affected landowners in early 2023.
Open cut installation is likely to start from April 2023. Work is estimated to take around four months to complete.
Before installation, we will:
Make contact with all residents and landowners who are directly impacted by the works to take detailed records of condition. We will also need to acquire Network Rail permission and other utility owners permissions before starting works.
We will also undertake environmental mitigation. This will include recording habitats suitable for protected species such as reptiles and badgers.
If required, we may remove all resident fences, boundary furniture and garden features as required within the Order Limits.
We will securely fence the site with temporary fencing and install noise mitigation measures such as acoustic blankets to reduce noise and disruption.
This section will now be undertaken as an open cut installation and runs from Stake Lane, across Prospect Road, along the southern boundary of the allotments and into Queen Elizabeth Park.
We will be completing this section of installation in two phases:
1) Stake Lane to Prospect Road and
2) Queen Elizabeth Park to Prospect Road.
Together the sections are approximately 440m long.
Open cut installation in this section will require Network Rail and third party approvals. We will also require a road closure on Prospect Road. For this we will need to seek a permit through the Highways Permitting Scheme.
In this section, there are a number of challenges in this section including a significant number of buried utilities which we need to work close to. In early 2023 we will be undertaking further trial holes in Prospect Road to determine the location of utilities. More specifically to determine the location of two high voltage electrical cables belonging to Scottish and Southern Energy (SSE).
Stake Lane to Prospect Road – Open cut street works
The section between Stake Lane and Prospect Road is approximately 200 metres. We will work in shorter sections to reduce the impact to residential properties and ensure access is retained to Brewers Close. This is known as a rolling works front.
In early 2023 we will confirm the configuration of the works in this area. Stake Lane will remain open with traffic lights for the duration of the works, we will be installing in only one carriageway at any time.
Driveway access directly in front of our fenced working area will be suspended. We will create alternative parking within our Order Limits for residents with restricted driveway access. Residents on Brewers Close will retain access.
Parking will also be suspended at the turning area at the end of Stake Lane.
Stake Lane garages will need to be removed during installation as they will be within the working area. We will contact landowners directly to discuss their arrangements under their existing land agreements.
Queen Elizabeth Park to Prospect Road – Open cut installation
We will be undertaking open cut installation from the park to Prospect Road moving east to west. This change in installation technique will not require any further vegetation removal in Queen Elizabeth Park.
The construction compound off Cabrol Road (Compound 4AE) will support these works.
We will open cut through the allotments, working closely with the Prospect Road Allotments association and its tenants. We will fully reinstate the allotments following completion of the works.
Once installation reaches Prospect Road, we will demobilise from Compound 4AE and reinstate the park’s play area and car park.
For this work there will be a full road closure of Prospect Road. All diversions will be clearly signposted.
We will now be using open cut installation to install:
Using an open cut trench is the most common technique for installation of the pipeline.
To install we will:
When working in the road these activities are undertaken in a different order as the trench is opened first to visually inspect the location of existing pipes and cables (other utilities).
Find out more about this installation technique here.
Section one – East of Cove Brook to Stake Lane
Before we start open cut installation between the east of Cove Brook to Stake Lane, we will need to undertake some vegetation and tree removal.
Section two – Stake Lane to Queen Elizabeth Park
This change in installation technique to open cut will not require any further vegetation removal in Queen Elizabeth Park.
Compound 4AD off West Heath Road will be used to support the works in section one which runs from the east of Cove Brook to Stake Lane (previously TC017).
Compound 4AE off Cabrol Road will be used to support the works in section two but only for the works between Queen Elizabeth Park and Prospect Road. Once installation reaches Prospect Road, we will demobilise from Compound 4AE and reinstate the park’s play area and Cabrol Road car park.
Our working areas are fully secure with locked gates and 24-hour security.
We will fully reinstate the working area and residential gardens once installation is complete. Reinstatement will be undertaken on a like for like basis.