Maclise Road car park and woodland, adjacent to Kensington Olympia Station … · 2016-10-14 ·...

Counters Creek storm relief sewer

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Site information paper

Site 3

Maclise Road car park and woodland, adjacent to Kensington Olympia Station

Key information boxSite name Maclise Road car park and woodland, adjacent to Kensington Olympia Station

Local Authority Royal Borough of Kensington and Chelsea and London Borough of Hammersmith and Fulham

Names of the sewers we are intercepting at this location Hammersmith storm relief sewer duplication branch

Site type Interception shaft site, spur tunnel drive site to Holland Villas Road site, active air management building

Depth of shafts Drop shaft for spur tunnel is approximately 25 metres deep and the interception shaft is approximately 12 metres deep

Approximate length of construction time 26 months

Roads affected Olympia Way, Maclise Road, Beaconsfield Terrace, Blythe Road, Hammersmith Road A315, Elsham Road, Masbro Road

Anticipated dates on site (subject to planning permission) September 2017 to November 2019

Key Proposed storm relief sewer

1 Cremorne Wharf Depot, Lots Road, Chelsea

2 Land adjacent to Talgarth Road and Trevanion Road, Hammersmith

3 Maclise Road car park and woodland, adjacent to Kensington Olympia Station

4 A section of the car park at Tesco Superstore, Shepherd’s Bush Road

5 Holland Villas Road at its junction with Lower Addison Gardens

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2 Counters Creek storm relief sewer

The Counters Creek Flood Alleviation Scheme is required to reduce the risk of flooding to basement properties within the Counters Creek catchment in the London Borough of Hammersmith and Fulham and the Royal Borough of Kensington and Chelsea. The present Counters Creek flooding register shows that over 1,700 properties are subject to flooding. It’s believed there are also unreported basement flooding incidents in the area and new reports of flooding continue to be received.

Basement flooding occurs when sewers become overwhelmed by storm water runoff and local sewer water levels rise and back up the sewerage network into basement properties. Several factors contribute to local sewer flooding:

Underground buildingProperties with areas below ground are more likely to be flooded because they are closer to or below the level of the sewers in the road.

The wider catchmentThe Counters Creek catchment receives storm flows from as far away as Brent and Camden reducing the capacity to deal with local storm flows.

Loss of natural drainageA loss of green space and an increase in impermeable surfaces results in more rainwater entering the sewer network.

We analysed each area to identify the cause of flooding and to establish the best solution to reduce the problem. We considered a number of possible solutions including installing anti-flooding devices which are small pumping devices known as Flooding Local Improvement Programmes (or FLIPs), constructing Sustainable Drainage Systems (or SuDS) and improving the existing

sewers. These approaches only provided some protection for some properties. A new storm relief sewer is needed in addition to these other measures to substantially reduce the risk of sewer flooding.

Related documents:

• Why we need the Counters Creek storm relief sewer

Background

HAMMERSMITH

BARNES

CHISWICK

West Kensington South Kensington

KENSINGTON

KENSINGTON AND CHELSEA

Shepherd’s Bush

Earls CourtExhibiton Centre

Westfield Shopping Centre

Stamford Bridge

Barons Court

GloucesterRoad

High StreetKensington

GoldhawkRoad

StamfordBrook

RavenscourtPark

Fulham Broadway

ParsonsGreen

HAMMERSMITH AND FULHAM

EarlsCourt

Olympia London

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Key Proposed storm relief sewer The main sewers in this area of London

1 Cremorne Wharf Depot, Lots Road, Chelsea

2 Land adjacent to Talgarth Road and Trevanion Road, Hammersmith

3 Maclise Road car park and woodland, adjacent to Kensington Olympia Station

4 A section of the car park at Tesco Superstore, Shepherd’s Bush Road

5 Holland Villas Road at its junction with Lower Addison Gardens

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Counters Creek storm relief sewer 3

IntroductionThis site information paper sets out our proposals at the Maclise Road car park and woodland, adjacent to Kensington Olympia Station as shown in Figure 1. We have also produced additional documents which explain general topics relating to the project. Where we consider an additional document is particularly relevant, we have highlighted this in a related documents box. At the end of this site information paper is a list of other documents which may be of interest.

Site location and surroundingsThe site, shown in Figure 1, lies within two local authority boundaries, the London Borough of Hammersmith and Fulham to the west and the Royal Borough of Kensington and Chelsea to the east.

The site is located in an area with a mix of land uses including a residential area to the west with the site boundary immediately next to back gardens of properties along Sinclair Road.

The site is located in an area of vegetation containing trees and is in a small northern section of the car park located off Maclise Road, known as Olympia Motorail Car Park 4. The car park is an essential component of the Olympia Exhibition Centre’s vehicle marshalling and parking system for the management of events.

Directly below the northern area of the woodland lies the Hammersmith storm relief sewer duplication branch. This presents an opportunity to access the sewer at this point to make the required interception.

The woodland is a Site of Borough Importance for Nature Conservation.

The Olympia Motorail Car Park 4 includes a paved area, a porta cabin and infrastructure associated with the operation of the car park (ticket machine and barrier, ticket attendant office and substation). Next to the car park entrance is a pair of Grade II listed telephone boxes. There is an open building covering part of the car park extending 20m-30m from the site entrance. This would either be removed or heightened during construction to allow construction vehicles to access the site. The details of reinstatement would be agreed with the landowners and Local Planning Authority. Once operational, we would need access to the infrastructure at the site.

To the south west of the site beyond the car park is Olympia Exhibition Centre, which includes the Grade II listed Olympia Grand Hall. Earls Court and Olympia Group have undertaken refurbishment work and in December 2011, Olympia West opened following reconstruction work. Olympia Central has also undergone refurbishment which re-opened in September 2012.

To the east of the site is the railway line and Kensington Olympia Station, with services from the London Overground, Southern and London Underground District Lines.

The site can be accessed via the Olympia Motorail Car Park 4 to the south. The car park is accessed off Maclise Road via Olympia Way. Both roads are one-way streets with Olympia Way under the private control of Capco and the Olympia Exhibition Centre. Maclise Road has on-street parking. Hammersmith Road, which provides access to the A4, can be accessed off Blythe Road via Maclise Road.

We will need three additional satellite sites with the Maclise Road car park and woodland site, as shown

Section 1: Introduction and site information

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Metres

Drive shaftInterception shaftNew storm relief sewerMain site

Borough boundariesExisting Counters Creek sewerHammersmith Storm Relief Sewer duplication branchExisting local sewers

Key:

Car park

RailwaySinclair RoadElsham

Road

Figure 1 Site map


in Figure 2. Two sites are needed for access to and emergency exit from the existing Hammersmith storm relief sewer duplication branch. Two of these satellite sites would be located within Elsham Road and Masbro Road where we would use the existing manholes sited in the roads to access the sewers, with temporary traffic management measures put in place. The third satellite

site is located within the Olympia Motorail Car Park 4 where we would either remove or heighten the open building to allow construction vehicles to access.

Based on the initial construction layout, the nearest residential properties are within 10m of the site, with back gardens immediately adjacent to the site. Once operational we would require maintenance access to the infrastructure at the site.

The site is covered by various planning and environmental plural: designations in the London Borough of Hammersmith and Fulham Core Strategy October 2011, and the Royal Borough of Kensington and Chelsea Consolidated Local Plan July 2015. The site is designated as a Site of Nature Conservation Importance (RBKC) and a Green Corridor (LBHF). The site lies immediately next to the Lakeside/Sinclair/Blythe Road Conservation Area and is located in Flood Zone 2.

Related documents:

• How we would build the proposed storm relief sewer

How we chose this siteWe’ve carried out a detailed site selection process to assess and identify the most suitable locations for the range of construction sites required to deliver the proposed storm relief sewer.

This process takes into account the community, property, environment, transport, engineering and planning issues relevant to the selection of the most suitable combination of sites. In particular, public and stakeholder feedback received over the past year has influenced the selected sites and the way we propose to use them.

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Metres

Drive shaftInterception shaftNew storm relief sewerSatellite siteMain site

Borough boundariesExisting Counters Creek sewerHammersmith Storm Relief Sewer duplication branchExisting local sewers

Key:

Car park

Railway

Sinclair Road

Elsham Road

Elsham Roadsatellite site

Masbro Roadsatellite site

Olympia Motorailcar park satellite site

Figure 2 Satellite sites

Figure 3 Alternative sites considered to Maclise Road car park and woodland, adjacent to Kensington Olympia Station



The alternative sites we looked atThe alternative sites considered at this location through our phase 1 and interim engagement processes are shown in Figure 3. The key reasons for not taking them forward are listed below:

Rifle Place and Edward Woods Town ParkConsulted on during the interim engagement process as a site to intercept the Counters Creek sewer and the Hammersmith storm relief sewer duplication branch.

• Reason: The London Borough of Hammersmith and Fulham confirmed the land will not be made available for use. The location is also surrounded by dense residential development and would have taken the open space out of use causing a considerable amount of disruption. This limits the opportunity to secure planning permission for the proposed site and to secure future access rights over the land for operational use.

Swanscombe Road and Norland HouseConsulted on during the interim engagement process as a site to intercept the Counters Creek sewer and the Hammersmith storm relief sewer.

• Reason: The London Borough of Hammersmith and Fulham confirmed this site is not available to use. The location is also surrounded by dense residential development and would have taken the open space out of use causing a considerable amount of disruption. This limits the opportunity to secure planning permission for the proposed site and to secure future access rights over the land for operational use.

Related documents:

• How we chose our preferred sites

What we are proposing at this siteTaking previous feedback received and the issues relating to alternative sites into account, the Maclise Road car park and woodland, adjacent to Kensington Olympia Station is the most suitable location. We are proposing to use the majority of the woodland and a small northern section of car park to construct an interception shaft to connect to the Hammersmith storm relief sewer duplication branch which lies directly under the woodland.

Making an interception in this area will provide flood alleviation benefits for basement properties that are currently impacted by flooding from the Hammersmith storm relief sewer duplication branch.

This location is also close enough to use as a drive site for the spur tunnel to the proposed site at Holland Villas Road. A second shaft will need to be constructed in the southern end of the site to drive the tunnel boring machine to the site at Holland Villas Road. It will also be used to connect the interception shaft to the storm relief sewer.

This will mean storm flows from the existing Counters Creek Sewer will be able to flow from the interception at Holland Villas Road through the spur tunnel and into the proposed storm relief sewer. We are also proposing to construct an air management building which will incorporate a ventilation stack to manage air pressures within the storm relief sewer. We would require permanent access to this site to maintain the sewer and air management building.

How our proposals for this site have changed since we last consulted on themSince our previous proposals, we are no longer proposing to use Kensington Olympia car park as the main tunnel construction drive site because the Olympia venue is planning to use the car park more often in the future for its events. We are now planning to drive the tunnelling for the proposed storm relief sewer from the site by the River Thames at Cremorne Wharf Depot, Lots Road.

We now propose to use the woodland to the north of the Maclise Road car park to intercept the Hammersmith storm relief sewer duplication branch as we have not identified any other suitable sites for this. We are also able to maintain access to the car park as required by the Olympia Exhibition Centre.

We are proposing to use the Maclise Road site to construct a small branch sewer to Holland Villas Road. This would connect the interception of the Counters Creek sewer at Holland Villas Road to the main storm relief sewer as it passes under the Maclise Road site.

Related documents:

• Have your say• How we chose our preferred sites


Section 2: Construction

Construction activitiesWe will clean and strengthen the existing Hammersmith storm relief sewer duplication branch and then construct an interception shaft to pick up flows from this existing sewer into the proposed storm relief sewer. We will drive the tunnel boring machine in a north easterly direction from the second shaft in the southern end of the site. This will be for the construction of a spur tunnel to the Counters Creek sewer interception site at Holland Villas Road. We would need to remove the trees at this site to allow us to carry out the work. After construction, a ventilation column, manhole covers and an air management building would remain. We would plant new tree species to enhance the woodland area.

Construction phasesWe expect construction here to take 26 months. The main stages of construction are described below and shown in Figure 4.

Typical working hoursThe following working hours are proposed and shown in Figure 5.

We will agree working hours with the Local Authority. It is likely for a 7am to 7pm dayshift, the first hour would be the ‘start up’ and the final hour ‘close down’, with ‘noisy’ activities limited to 8am to 6pm. We will put in place appropriate mitigation measures to reduce noise and prevent disturbance where practical.

There are approximately five weeks of 24 hour working involved for when the main tunnel boring machine passes through the site and when the second tunnel boring machine passes beneath the railway to construct the spur tunnel.

Main stages of construction

Days Hours of work

Site establishment, piling, chamber construction, shaft sinking, finishings and demobilisation

Monday to Friday 07:00 to 19:00

Saturday 07:00 to 13:00

Sunday No work

Tunnelling (within the zone of influence of the railway or other asset), and during the crossing of the shaft by the main tunnel boring machine

Monday to Friday 24 hours

Saturday 00:00 to 13:00

Sunday No work

Works altering the cladding of the building at the south end of the car park


Works within the existing sewer


Figure 5 Proposed working hours

Site layout The site layout has been designed according to the size of the infrastructure proposed, construction methods required and location of the neighbouring buildings and structures. It has been developed to minimise effects on the local community and environment.

The site layouts, a version of which is provided in Figure 6 and more details of which are provided at our drop-ins and online, show our current proposals. The details may still change in light of feedback from our phase 2 consultation.

2017 2018 2019 2020

Drawing phase

Main stages of construction Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Advance works

Site set up

1 Shaft sinking

2 TBM drive to Holland Villas Road

3 Connection works

4 Permanent works

Site reinstatement

* The dates are indicative and subject to further considerations in consultation with Tideway and landowners.Figure 4 Site construction phasing



Wandsworth

Kensington &Chelsea

Hammersmith &Fulham

Hyde Park

CremorneWharf

WormwoodScrubs

BatterseaPark

Westminster

CONCEPT DESIGN DRAWINGS. ALL LAYOUTS AND DETAILSLIABLE TO CHANGE AS THE DESIGN DEVELOPS.ALL MEASUREMENTS IN mm UNLESS OTHERWISE STATED.ALL LEVELS IN METRES ABOVE ORDNANCE DATUM.

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INTERNAL SITE ROAD

SITE ACCESS

SINCLAIR ROAD

RUSSELL GARDENS MEWS

NASBORO' ROAD

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Thames Water Utilities Ltd 2006c

Drawing No:

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Figure 6 Site layouts for construction phases

Key

Maximum extent of phase incorporating site hording

Site support/welfare

Excavated material storage and processing

Maintenance workshop and storage

Construction support

Internal site road

Site access

Phase 1 Phase 2

Phase 4Phase 3


Construction traffic routes and accessWe are working with the highways departments of Transport for London, London Borough of Hammersmith and Fulham and Royal Borough of Kensington and Chelsea to confirm the exact construction vehicle route. We are proposing the following routes described below and as shown in Figure 7.

For large vehicles and also when Blythe Road is exit only, traffic would access the site from the A315. They would turn onto Olympia Way, pass Kensington Olympia Exhibition Centre and station and drive through the Maclise Road car park and into the site.

If Olympia Way is congested, the alternative access to site for smaller construction vehicles would be to approach on the A315, turn into Blythe Road and follow this road taking two left turns. Turn right into Hazlitt Road, right into Sinclair Road and left into Maclise Road. They would then enter the Maclise Road car park and into the site.

Traffic leaving the site would be turned on a specially installed vehicle turntable inside the site. Traffic would then leave through site entrance and Maclise Road car park, turn right onto Maclise Road, left into Beaconsfield Terrace Road (becoming Blythe Road) and left onto the A315. Beyond this, construction traffic would use the major road network to get to and from its final destination.

Access through Maclise Road car park would require coordination with Kensington Olympia to make sure there is the minimum amount of disruption. It’s anticipated this may at times require the short-term suspension of constructions operations or the storage of materials on site. This means construction could continue for a few days without HGV access.

Construction traffic managementWe will review the effect of traffic to and from Kensington Olympia. We will be working closely with the owners of the Kensington Olympia Exhibition Centre before and during the work. We may restrict our construction traffic during events at Kensington Olympia.

As part of the work on the storm relief sewer in the Maclise Road car park and woodland site, we will be upgrading the existing Hammersmith storm relief sewer at our satellite sites on Masbro Road and Elsham Road. This means sections of roads would be reduced to a single lane for an estimated eight weeks. This would affect the junctions of Masbro Road with Sinclair Road and Elsham Road with Addison Road.

Masbro RoadWe will need to close a lane on Masbro Road to access the existing Hammersmith storm relief sewer duplication branch. We would use temporary traffic lights to safely control traffic past the work and through the Masbro Road junction with Sinclair Road. This is expected to be between 8pm to 6am when each shift is carried out at night. At the end of each shift, we will close the manhole, reduce the site boundary and open the traffic lane along Masbro Road.

Elsham RoadTo access the existing Hammersmith storm relief sewer duplication branch, we will need to suspend a few car parking spaces for a short period of time and impact the cycle route as detailed under the parking suspensions and cycle route sections.

Figure 7 Construction traffic routes



Construction vehiclesAll materials to and from site would be transported by road. Vehicles leaving site must do so under the direction of a qualified traffic marshal to make sure there’s no risk to passing traffic, cyclists or pedestrians.

The anticipated average daily number of lorries travelling to and from the site during the peak months of each phase are shown in Figure 8.

Advance Works

Site Set up Shaft sinking Tunnel drive Shaft internal works

Permanent Works

Site reinstatement

Typical working hours Variable Standard Standard with extended standard

Standard with some continuous

Standard with extended standard

Standard with extended standard

Standard

Utilities diverted and connected ✓

Site clearance ✓

Site facilities ✓

Piling ✓

Shafts excavated and built ✓

TBM drive ✓

Connection pipejack ✓

Existing sewer connection ✓

Shaft internals ✓

Air management works ✓

Site reinstatement ✓

Average daily number of lorries 2 4 12 14 8 6 4

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* Standard working hours: 8am - 6pm Monday to Friday, 8am - 1pm Saturday* Extended standard working hours: 6pm - 10pm Monday to Friday, 1pm - 5pm Saturday Figure 8 Average daily number of lorries


Parking suspensionsWhile some parking on the Kensington Olympia site will be lost, no parking suspensions are anticipated on the roads next to the main site.

We will need to temporarily suspend approximately four parking bays on the northern side of Masbro Road and four parking bays on the western side of Elsham Road for short periods of time. This is when we access the existing Hammersmith storm relief sewer at night. At the end of each shift, the manhole would be closed and the site boundary reduced.

We will assist with alternative parking where possible. We will carry out parking surveys to identify the parking capacity of the area and see if vehicles can park elsewhere.

Bus services and bus stopsWe do not expect any bus routes will be affected by the proposals.

Emergency services accessWe will be working with the fire, police and ambulance services to make sure access can be maintained to all properties.

Pedestrian routesWe will need to divert the Addison Gardens southern pavement crossing on Elsham Road during our night work on the sewers. This would be clearly signposted to direct pedestrians around the site safety. All other pedestrian routes are expected to remain unaffected. We will provide effective pedestrian and vehicle separations to ensure the safety of pedestrians around Kensington Olympia and the station. There will be an increase in traffic along

Olympia Way and it could take pedestrians slightly longer to cross the road from the station to the exhibition centre than at present.

Cycling routesWe will need to stop the on-road contra-flow cycle lane along Elsham Road to the south of the junction with Addison Gardens only at night. At all other times the cycle lane will be open as usual. This is because the cycle lane will be obstructed during the night work. We would use clear signs to show cyclists to dismount and use the pavement to travel towards Addison Gardens where they can resume their journey. We do not expect any other cycle lanes or facilities will be affected by the proposals.

Access to propertiesThere may be temporary access restrictions to some properties during some phases of construction work. If this should happen, we will notify residents in advance.

Bin collectionsWe do not expect any residential bin collections will be affected by the work.

DeliveriesWe do not expect any deliveries to residents’ properties will be affected.

Provision of alternative facilities during constructionIt is anticipated that the Maclise Road site (in common with other satellite sites) would be supported by an off-site logistics centre. This is where larger delivery vehicles would be unloaded and materials taken onto the Maclise Road on smaller vehicles, at pre-arranged times.

Health and SafetyWe will make sure we create a safe workplace on and around our site for the public, site neighbours, our employees and contractors. We will regularly audit the site to make sure all activities are in line with our strict health and safety policies.

Tree removalIf we are to use the site for construction then a substantial amount of tree removal is unavoidable but we aim to retain as many trees as possible, especially around the site boundary for screening purposes. We have undertaken a tree survey which shows that the best tree specimens are those along the western boundary of the site. Many of these are in people’s gardens and these will not be removed. We also hope to avoid any impact on these trees and their root structures. We are currently reviewing the construction site layout. We will optimise the construction layout for this site to save as many trees as we can and we will work with the London Wildlife Trust on the best method of achieving this.

The Maclise Road site is also part of a larger area designated as a Site of Borough Importance for Nature Conservation which means that it has a value for wildlife. Our ecological survey work shows this area consists of a high proportion of non-native sycamore trees which best practice habitat management suggests should be replaced with native species. Therefore, we are confident that we can provide ecological enhancement as part of our site restoration works through planting native species such as oak and other ecological measures which we will agree with the London Wildlife Trust.

Section 3: Issues relating to construction



Full details of the ecological surveys and mitigation proposals will be available in the Environmental Statement which will accompany the planning applications.

Noise and vibrationDuring constructionThe site layout is being carefully considered to ensure noisy equipment and construction activities are positioned to minimise impacts. Where possible, we will avoid the use of noisy machines. For instance, we would use power from the electricity grid rather than on-site generators.

We are carrying out noise modelling to predict and mitigate noise impacts from construction activities. Full details will be available in the Environmental Statement which will accompany the planning application.

An increase in noise is expected during construction but we’ll make every effort to reduce the noise impacts on residents. We will select quieter construction methods and equipment where possible and place acoustic barriers around specific equipment and operations. Other noise and vibration control measures will be implemented at the site and will be explained in the Environmental Statement.

Continuous tunnelling works would be undertaken for approximately five weeks as tunnel boring machines pass the site. Tunnelling works are not expected to cause substantial noise or vibration.

Vibrations generated from the tunnelling work are not normally expected to cause any disturbance. If vibration thresholds are breached, we will identify the cause

and take appropriate measures to reduce or eliminate the impact.

After construction We don’t expect any noise impacts or vibration during operation. We will carry out a full inspection of the main sewer alignment at least once every ten years. With all sewer operations, emergency night time access may be required in the future which may cause temporary noise impacts.

Dust Dust control measures will be put in place including:

• Additional screening of construction activities known to generate dust

• Sealing dust generating surfaces, for example stripped soil and sandy surfaces

• Regular road sweeping where possible• Water sprinklers and wheel washes to reduce dust

transferWe will carry out dust monitoring on the construction site while work is taking place, the details of which will be agreed with The Royal Borough of Kensington and Chelsea and The London Borough of Hammersmith and Fulham Environmental Health Officer.

Air qualityWe have agreed air quality monitoring locations with The Royal Borough of Kensington and Chelsea and The London Borough of Hammersmith and Fulham Environmental Health Officer and the findings will be reported as part of the Environmental Assessment. The monitoring will be part of an air quality assessment which

will determine what appropriate mitigation measures we will need to reduce any air quality impacts. These measures may include:

• Making sure all vehicles and machine engines are switched off when not in use

• Using low emission vehicles and machines• Minimising construction vehicle movementsIt is unlikely there will be any negative impacts on air quality during the construction phase or operational phase with appropriate mitigation in place.

Our baseline air quality monitoring has identified the main source of air pollutants is exhaust emissions from vehicles on the A3220 Holland Road, Hammersmith Road to the east of the site, and the A315 Hammersmith Road to the south of the site.

OdourDuring constructionThere may be some odour for a short period of time during the interception work with the existing sewers.

After constructionThe results of our odour modelling have been used to plan the layout of the site after construction. The active air management building and ventilation column will become permanent above ground structures and will be used to control the release of displaced air from the proposed storm relief sewer. These columns will be approximately ten metres high in order to disperse air and will also contain carbon filter panels to absorb any odours.


LightingTemporary lighting will be provided during the construction phase for safety and security reasons. Potential impacts of lighting on ecology and townscape will be considered as part of the Environmental Assessment.

Lighting will be required during construction work depending on daylight conditions. Lights would be positioned on posts and face downwards, away from the windows of residents. We will need lighting on smaller stands for task specific work. These lights will be switched off at the end of the working shift.

Additional lighting will be installed around the site boundary, wherever the site’s hoarding blocks street lighting. These lights will be turned on at dusk and remain on throughout the night. If a pavement is permanently dark, these lights will remain on at all times.

Related documents:

• Being a good neighbour• Environment• How we would build the proposed storm

relief sewer• Transport

Figure 9a An artist’s impression of the site – after the works are completed

Shaft and connection culverts located below ground

Air management building with 10m high ventilation column

Car parking reinstated

New semi-mature tree planting to reinstated woodland area

Grass planting to access route

Sinclair RoadM

asbr

o Rd

Elsham Road

Railway

Maclise Road Car Park



What we will leave at the siteThe site would need permanent below and above ground structures. Designs of permanent above ground structures will still need to be confirmed. We want to

know what you think of these proposals for this site and how it would look after we have finished construction.

Section 4: After construction

Figure 9b An artist’s impression of the site – after the works are completed

Manhole coversWe will need to install manhole covers in the car park for the south shaft. It is estimated these will include:

• Access and exit cover• Man rider access cover• Davit and safety railing sockets covers• Valve access coverWe will need to install manhole covers in the car park for the north shaft. It is estimated these will include:

• Access and exit cover• Man rider access cover • Davit and safety railing sockets covers• Penstock access cover

Ventilation It is currently anticipated that Maclise Road is likely to have an above ground active air management building which would include the following:

• One ventilation column 2.5m diameter and approximately 10m high

• Carbon panel filter units• High pressure emergency relief dampers that bypass

the carbon filter panels• Below ground access ducting• Air sampling points before and after the filter panels• Air extracting and control equipment

KioskTo operate the mechanical equipment installed at the site, a Glass Reinforced Plastic (GRP) kiosk measuring a maximum of 2m x 1.5m x 2m high would also be installed


above ground to house telemetry, and control panels for the penstock operation. According to standard details, the kiosk would be green in colour. We are intending to place the kiosk in the air management building to reduce impact.

The new air management building and the paved areas required for maintenance will be sensitively integrated

into the south end of the site. We plan to maximise areas of soft landscape and plant new trees of species that will enhance the ecological diversity and character of the existing woodland area and respect the site’s designation as a Site of Borough Importance for Nature Conservation. Trees may also be selected for their size and ability to screen the structures from the properties to the west of the site.

Operation and maintenanceMaintenance access would be required at all chamber locations, below ground structures, kiosks and weir structures. A full inspection of the main sewer alignment is expected to be required at least once every ten years.

We would need to use a mobile crane and support vehicles to make sure this operation is carried out safely. Regular operating and maintenance of penstocks would be required on a more frequent basis, and access would be needed on a six monthly basis.

The filter media would be changed as and when required. This would be dependent on the sampled air leaving the chamber, monitored at regular intervals. It is expected that replenishing/replacement of the carbon filters would be once every three years. A number of these maintenance visits would be scheduled to coincide with each other.

Maintenance access would require vehicular access to the site. The number of vehicles and personnel required would depend on the timing and type of operational activity being carried out. With all sewer operations there is a probability that night-time access may be required in the future.

Related documents:

• Being a good neighbour• How we would build the proposed storm

relief sewer

Figure 9c An artist’s impression of the active air management building – after the works are completed



Your comments on our proposals will help us to understand the local issues that matter to you. We will look carefully at all comments and make changes to improve our proposals where possible.

You can send us your comments in the following ways:

• Visit our website thameswater.co.uk/counterscreek and complete our online feedback form.

• Pick up a paper feedback form and freepost envelope from one of our drop-ins or call us on 0800 316 9800 to request one.

• You can send us your comments by email to [email protected]

• You can also send us your comments in a letter to: Counters Creek sewer flooding alleviation scheme consultation Freepost RTHE-CJYY-CXCJ 7 St Peter Street Winchester SO23 8BW

Tell us what you thinkThis section provides details of the other consultation documents that you may find particularly useful.

Phase 2 public consultation materialsThere are 12 additional documents set out in the table below that may be of particular interest. They explain general topics relating to the Counters Creek sewer flooding alleviation scheme.

Further information on our proposals can be found on our website at thameswater.co.uk/counterscreekEmail us at [email protected] us on 0800 316 9800 and select option 2 and quote reference number BB 968577Follow us on Twitter @CountersCreek

Further information

Title DescriptionBeing a good neighbour Includes information on what measures we will put in place at our sites during

construction to minimise disruption. Environment Sets out the process the project is following to assess potential environmental effects

of the Counters Creek scheme.Feedback from our phase 1 consultation and engagement process

Summarises feedback received from our phase 1 consultation and interim engagement.

Getting planning permission Explains the stages of planning application process from our phase 2 consultation through to a decision being made on our application.

Have your say Shows where you can find further information and provide feedback on our proposals.How we chose our preferred sites

Sets out the process we followed to find our preferred sites.

How we would build the proposed storm relief sewer

Provides information on the different types of sites required for the Counters Creek scheme and the typical construction activities that will be undertaken at each site.

Site suitability report (SSR) Provides an assessment of the opportunities and constraints associated with developing the site for the storm relief sewer.

Timing Describes the next steps following our phase 2 consultation from submitting our planning application to the end of construction.

Transport Contains information on the different transport options we have considered for delivering and removing materials from our sites.

Tunnel drive strategy Describes how we will drive the tunnel boring machine and create the storm relief sewer.

Why we need the Counters Creek storm relief sewer

Explains why we are proposing the sewer flooding alleviation scheme and outlines the problems with sewer flooding in the area.


Project contact details:

Web: www.thameswater.co.uk/counterscreek

Email: [email protected]

Phone: 0800 316 9800

Postal address: Counters Creek sewer flooding alleviation scheme consultation, Freepost RTHE-CJYYCXCJ, 7 St Peter Street, Winchester SO23 8BW

Related documentsThe following documents are available at our drop-in sessions and to download from the document library on our website - www.thameswater.co.uk/counterscreek

Phase 1 consultation and engagement process• Feedback from our phase 1 consultation and

engagement process• Phase 1 Consultation and Engagement Process

Feedback Report

Project information• Being a good neighbour• Environment• Getting planning permission• Have your say• How we chose our preferred sites• How we would build the proposed storm relief sewer• Transport• Timing• Tunnel drive strategy• Why we need the Counters Creek storm relief sewer

Site information• Cremorne Wharf Depot, Lots Road, Chelsea • Land adjacent to Talgarth Road and Trevanion

Road, Hammersmith• Holland Villas Road at its junction with Lower

Addison Gardens• Tesco Superstore car park, Shepherd’s Bush Road

Site Suitability Reports• Cremorne Wharf Depot, Lots Road, Chelsea• Land adjacent to Talgarth Road and Trevanion

Road, Hammersmith• Maclise Road car park and woodland adjacent to

Kensington Olympia Station• Holland Villas Road at its junction with Lower

Addison Gardens• Tesco Superstore car park, Shepherd’s Bush Road

Maclise Road car park and woodland, adjacent to Kensington Olympia Station … · 2016-10-14 ·...

Documents

Transcript of Maclise Road car park and woodland, adjacent to Kensington Olympia Station … · 2016-10-14 ·...