Chiltern Line works update:
We wrote to you recently about night time works near the Chiltern line. We have revised the dates for these works which will now take place from 15 February to 1 March 2021 and 1 April to 16 April 2021. These dates have been revised due to the piling methodology review being carried out in this area.
Update on Breakspear Road South with revised dates:
We are trying to reduce the number of lorries using local roads. To this end we are continuing to set up a crossing point for our internal haul road across Breakspear Road South. To ensure that this area is ready for our future works we will need to construct wider junctions. These bell-mouth junctions make it easier for lorries to negotiate turns and ensure that they do not enter the opposite carriageways.
We will also secure stronger verges, erect hoarding and carry out modifications to the pedestrian footways and crossings. Most of the works on the carriageways will be under lane closures. However, there will be night time full road closures needed on 23 February and 7 March 2021. This is to ensure that the installation of traffic barriers and bell mouth access can be carried out safely.
To reduce the number of HS2 lorries using local roads we are building an internal haul road between our construction sites, crossing Breakspear Road South. To build the crossing point we will need to close Breakspear Road South from 12-15 March 2021. Closing the road and working over a single weekend will reduce the impact on traffic flow in the area and will allow us to work safely.
We will remove the existing road surface in order to construct wider junctions. Additionally, we will compact the area and resurface the carriageway, which will include new line markings and repositioning of concrete traffic barriers.
Utility surveys at Breakspear Road South:
During the week commencing 1 March 2021, we will be carrying out utility surveys along Breakspear Road South near Fine Bush Lane. This will help to inform our design decisions in the area.
Cedar Avenue and Great Central Avenue update with revised dates:
From 15 March 2021, we will be carrying out ground and sewer system investigation at Cedar Avenue and Great Central Avenue. This will help to inform our design decisions in the area.
UK Power Networks works in the highway
During the start of the Covid-19 outbreak, UK Power Networks, in conjunction with both Harrow and Hillingdon London Boroughs, prioritised work at road junctions due to vehicle numbers being significantly reduced in the area. Works are nearly complete for the duct installation. We are now moving into the joint bay works in February 2021.
Joint Bays and Cable Pulling starting feb 2021
Once these works for installing ducts are complete, we will have to come back at 14 locations across the route to install our cable. The places we will be revisiting will be approximately 50m in length each and will be there around a month at a time. The planned start date is February 2021 in Harrow and we will work towards Hillingdon opening two joint bays at a time to allow for the cable pull between the two. These works area planned to continue until June 2021.
Letter drops will be provided for affected residents and businesses in the area.
At present we are carrying out 11kV cable pulling works in Clacks Lane in order to power the site supplies for the UK Power Networks substation and SCS welfare at the West Ruislip TBM portal. These works will allow a number of the generators on site to be removed.
The joint bays can be found at the these locations. Planned dates for 2021 are below:
Transformer deliveries – West Ruislip TBM Portal
As part of the substation installation, we will have 2no. Electrical Voltage Transformers delivered to our site. These transformers will change the incoming voltage from 33kV down to 11kV so that we can eventually power the Tunnel Boring Machines at their required voltages.
Our transformers will be delivered at the weekend as they are coming directly from their delivery port, as they have been shipped from overseas. They are delivered through the night due to the load and will arrive at the West Ruislip portal in the morning in each instance. The works to install these transformers will be carried out across the following weekends:
Transformer 1 delivery: Saturday 13th March and Sunday 14th March
Transformer 2 delivery: Saturday 27th March and Sunday 28th March
At present, these dates are planned with our suppliers, however should there be any changes to the delivery due to freight passing the UK border we will update all residents and businesses accordingly.