Canterbury Works headhouse and compoundDesign engagement – November 2020

The HS2 route between Euston and West Ruislip

The information on the following slides is presented to show you the design for the Canterbury Works headhouse and compound.

We are also asking for your feedback to help shape our final design of the headhouse and compound. Your comments will be considered in the next stage of review, which will take place within the next couple of months.

Skanska Costain STRABAG Joint Venture (SCSJV) is our Main Works Civils Contractor between Euston and West Ruislip (see map above). They are responsible for building the HS2 ventilation shafts, headhouses, tunnels and other structures in London.

Old Oak Common

station

Euston

station

Granby Terrace Bridge

headhouse

Euston Portal

headhouse

Euston Cavern

headhouse

Adelaide Road

headhouse

Canterbury Works

headhouse

Victoria Road

crossover box

Westgate

headhouse

Mandeville Road

headhouse

Green Park Way

headhouse

South Ruislip

headhouse

West Ruislip Portal

LocationThe Canterbury Works site is located in South Kilburn, behind Canterbury Road and Canterbury Terrace and next to the existing railway tracks.

View along Canterbury Terrace

View of St Mary’s Catholic Primary School

3

St Mary’s Catholic

Primary School

Former Pub

Canterbury House

1

2

View of Canterbury House from Canterbury RoadSite boundary

Residential propertiesoverlooking the site

Locally Listed Buildings

Site access / exit points

School

1

2

3

Wider site context

Canterbury Works site

Overview of a vent shaft and headhouseThe vent shaft and headhouse are key components in any rail infrastructure

What is a vent shaft?A vent shaft, or ventilation shaft is a vertical opening that connects the tunnels to the surface and open air. It uses fans situated in the fan house to regulate air quality and temperature in the tunnels, provides access for emergency services and allows smoke to be extracted in the event of a fire.

What is a headhouse?The headhouse is the building on top of the vent shaft which contains the fire control and ventilation systems for the railway tunnels below. The headhouse will include a fan room.

When will the fans operate?The fans will operate when extra ventilation is needed to the HS2 tunnels, during maintenance and during an emergency. You should not hear the fans running above the normal noise of the local area. However, you might notice the fans running during an emergency as they will need to run at a greater rate to provide ventilation and extract smoke in the event of a fire.

The headhouse will be above ground

The ventilation shaft and running tunnels will be below ground

Previous design

1

1 ATS

Scheme Design characteristics

• Single volume ventilation stack with large blank wall and screen

• Long auto-transformer station (ATS) compound with brick screening wall

• Headhouse embedded into landscape

• Green roofs

Current design

1

1

Dark grey brick

Auto –transformer station

Revised design characteristics from previous design

• Smaller and articulated ventilation exhausts reducing visual impact

• Smaller auto-transformer station building to reduce visual impact

• Small increase in two-storey building

• Curved feature wall adding visual interest to view from train

• Headhouse embedded into landscape

• Further development of plans for green roofs

• Boundary treatments to be confirmed

Headhouse section viewpoint

Headhouse appearancePlanned materials The material pallet has been chosen according to the environment, moving from brick, through metal towards wood as we move between rural and urban locations.2. TIMBER

Accoya or similar modified softwood naturally weathered to silver grey colour

1. BRICKEngineering brick for walls, retaining wall and paviours in dark grey or similar

5. GREEN ROOFIntensive Green Roof with deep growing substrate and biodiverse planting.

4. STAINLESS STEELKick plates, handles and special panels in brushed finish

3. METALSteel cladding panels, doors and louver panels, polyester powder coated dark grey

Visualisations of the headhouse

2.

1.

*Landscape elements are shown indicatively

please refer to landscape drawings for proposals

1. Low view of the headhouse from St Mary’s School

2. Low view of the headhouse from Canterbury House

Visualisations of the headhouse

*Landscape elements are shown

indicatively please refer to landscape

drawings for proposals

3. Low view of the headhouse from railway

4. Raised view of the headhouse from railway

Visualisations of the headhouse

6.

5.

*Landscape elements are shown indicatively

please refer to landscape drawings for proposals

5. Raised view of the headhouse from St Mary’s School

6. Raised view of the headhouse from Canterbury Terrace

Visualisations of the headhouse

*Landscape elements are shown

indicatively please refer to

landscape drawings for proposals 7. View of the headhouse from the south east of Canterbury Terrace

External lighting

Key

Lighting Zones

We will be illuminating various zones throughout the site with a mixture of lighting fixtures. When the site is unoccupied these lights will emit a low dim. This will increase in the following situations:- emergencies, when switched on

locally/remotely, - when vehicles are manoeuvring- upon gate opening- when intrusion is detected to aid

enhanced CCTV surveillance.

Headhouse Access Point

Here you can see our future lighting plans

Examples of wall wash feature lighting

Local materials and colours

Principle building materials Brick / rendered brick Metal cladding

Principle paving materials Concrete slab / block paving Concrete / granite kerbs

Principle boundary treatments Brick walls Metal fencing

Principle vegetation types Street trees Ornamental / amenity planting

Photographic survey of materials and colours in the local area

Landscape masterplan

Trees and scrub habitat planting Grassland habitat planting Green roof

2.8m high security wall / fence

Deep substrate green roof

Trees and scrub habitat planting

Grassland habitat planting

Biodiverse green roof

Brick pavers

Auto-transformer station

Scrub habitat planting

Feature shrub planting

Feature shrub planting

Access gate

Access gate

Tarmac

Climber planting

Concrete block / slab paving

2.8m high security wall

Here you can see the different areas of our future landscaping plans

Landscape sections

2.8m high security wall/

fence

Security fence to ATS

Biodiverse green roof

Semi-mature tree

2.8m high security wall/

fence

2.8m high security fence

2.8m high security wall/

fence

Biodiverse green roof

Deep substrate green roof

Semi-mature tree

Headhouse Headhouse

PathPath

Path Path

Feature planting Feature

planting

HardstandingATS

Grassland planting

Scrub Planting Scrub

Planting

Section A-AA is a section viewpoint from Canterbury House Section B-BB is a section viewpoint from St Mary’s School

Here you can see our future landscaping plans from different viewpoints

Security boundaries

Security Gate -visual permeability

Vertical metal railing

Options for site boundary

Security fence Existing gate by the Canterbury House

Current proposal: Brick boundary wall

Alternative proposal: Combination of brick wall and vertical rails

Shared access with Network Rail to/from

Albert Road

Access to HS2 Compound

Maintenance access gate

Access gate to HS2 compound to/from

Canterbury Road

Access to HS2 Compound

Key:

Brick wall 2.8m overall height

Brick wall – Design to tie in with streetscape

Brick wall – Design to meet NR requirements

Metal fence – HS2 standard 2.8m overall height

Metal vertical railing fence 2.8m overall height

Metal vertical railing fence 1.4m overall height

Brick wall 2.8m overall height

Brick wall 2.8m overall height

Here you can see our plans for security boundaries and fencing

Planting palette

Acer campestre ‘Streetwise’Field Maple Streetwise’

Carpinus betulus Common Hornbeam

Betula pendulaSilver Birch

Coryllus avellanaHazel

Ilex aquifoliumHolly

Sorbus ariaWhitebeam

Here you can see our plans for tree planting

St Mary’s School – Learning landscapes

SCSJV will be engaging with St Mary’s School to discuss possible landscaping opportunities for the ‘’pocket park’’ area of the site. Some of the topics to be discussed are as follows:

Future proposal• Sensory garden – edible species, aromatic

herbs, contrasts, planting with texture • Educational green wall – improvements to

air pollution and potential to learn about planting

• Maximising biodiversity – species to encourage wildlife

• Ecological features for invertebrates• Play opportunities• Sustainable drainage

Construction Phase• Integration of art into the hoarding design• Green wall to reduce air pollution• Construction views through the hoarding• Interactive opportunities for play

The pocket park is the purple zone on the diagram

We would like to hear from you

• Do you like the materials proposed for the headhouse?

• Do you think the materials will blend in with the wider area?

The materials proposed in our current scheme design for the Canterbury Works headhouse are timber, steel,

concrete and brickwork. We are planning to use similar materials at all headhouses between Euston

and West Ruislip but the combination of materials will vary depending on the local area.

• Do you like the landscaping plans for this site?

Our future landscaping plan for the Canterbury Works site considers local ecological and vegetation

requirements, whilst blending into the current live railway. The current landscape design also includes

block/slab paving, tree planting, scrub and grassland habitat planting and a green roof topping the

headhouse.

We would like to hear from you

• Do you prefer the following:

• 2.8 solid brick boundary wall or

• A combination of 1.2 metre high brick boundary wall with railing to total height of 2.8 metres

We are proposing to install 2.8 metre high brick boundary wall to the back of Canterbury House and

Canterbury Terrace residential buildings.

• Do you like our plans for sensory gardens and tree planting next to St Mary’s Catholic Primary School?

• Would you like this area to include any of the following: insect hotel, education green wall, opportunities for play, susttaibnle drainage feature?

We are proposing to install a sensory garden and tree planting area next to the boundary with St Mary’s

Catholic Primary School.

Works planned at Canterbury Works site

Planned works Planned dates for works*

Changes to existing worksite fencing, gates and security Autumn / winter 2020

Works to remove foundations from previous buildings Autumn 2020

Clearance of vegetation inside site boundary Winter 2020

Installation of working platforms Winter 2020

Works to strengthen existing retaining wall Winter 2020

Ongoing utility surveys in your area Autumn 2020

Start excavation to build ventilation shaft From spring 2021

Start works to build the headhouse From spring 2022

SCSJV started works to set up the Canterbury Works site in August 2020.

Our ongoing works to set up the site and future works to build the ventilation shaft and headhouse are shown in the table to the right.

*The dates for these works may change. We’ll provide updates at HS2inKilburn-Northolt.co.uk

Our lorry routes

Our lorry routesOur lorry routes have been agreed with Brent Council. We will use the most suitable routes between our worksite and the Transport for London Road Network (TLRN). You can find out more at HS2inKilburn-Northolt.co.uk

Construction traffic Construction of the vent shaft and headhouse will have varied periods of construction activity. During phases of high activity on site, such as piling, excavation and construction of the shaft, there will be a corresponding increase in heavy goods vehicle (HGV) movements. There will also be periods during construction where the need for HGV movements will be lower.

Kilburn Lane

A40Wood Lane

Barlby Road

Ladbroke Road

Carlton Vale

A5

Canterbury Works site

Site exit

Site entry

Maida Vale

Canterbury Works site

KeyWorksite access locations

--- Lorry route (Local authority roads)--- Lorry routes (Transport for London Road Network)

Here you can see the lorry routes and site access points for the Canterbury Works site

How to find out more and have your say

Attend our online information event

Due to the Covid-19 pandemic we are not currently able to hold face-to-face public events.

We are holding online information events on 10 and 12 November to share information about the design of the Canterbury Works headhouse and compound. You will be able to ask questions during these events.

For more information and to find out how to join these meetings visit hs2inkilburn-Northolt.co.uk

How to have your say

Please provide us with your feedback by 20 November 2020. You can do this by:• Completing our survey at hs2inkilburn-Northolt.co.uk• Emailing hs2enquiries@hs2.org.uk• Phoning the HS2 Helpdesk on 08081 434 434 • Using our minicom service on 08081 456 472

Unfortunately due to the current global pandemic we are unable to process responses received by post.

Next steps

We will consider the comments and feedback received to see what can

included in our final design

We will provide information and hold an event to let you how the comments and feedback

have been included in our final design

We will request for approval of the planning application for the design

from Brent Council

We will keep the local community updated about

construction at the Canterbury Works site