The scheme is an integral part of Highways England's commitment to deliver a high-performing, high-quality route along the A303/A358 corridor between the South West and South East. It will also help to conserve, reconnect and enhance the Stonehenge World Heritage Site (WHS), making it easier to reach and explore, as well as improving biodiversity and providing a positive legacy for nearby communities.

The scheme will be approximately 8 miles (13 km) long and comprises the following key components:

— a northern bypass of Winterbourne Stoke with a viaduct over the River Till valley,

— a new junction between the A303 and A360 to the west of and outside the WHS, replacing the existing Longbarrow roundabout,

— a twin-bore tunnel approximately 2 miles (3,3 km) long through the WHS, and

— a new junction between the A303 and A345 at the existing Countess roundabout.

Extended TitleA303 Amesbury to Berwick Down
Extended Description

Highways England is looking to work collaboratively with a high performing partner, their supply chain and stakeholders to successfully realise the aims of this challenging and rewarding scheme.

The requirements of the scheme that will be the responsibility of the successful applicant are principally captured in the following areas:

1) Design and construction of the new works

The scheme's new works includes the design and construction of the civil, Mechanical, Electrical and Plumbing (MEP), technology and environmental components, key features of the new works are summarised below:

— tunnel: a twin-bore tunnel, approximately 2 miles (3,3 kilometers) long beneath the Stonehenge World Heritage Site, including tunnel portals and approach structures, tunnel service buildings and plant rooms, tunnel control system and mechanical, electrical and plumbing systems,

— tunnel boring machine — design, manufacture, testing, shipping and on-site assembly,

— carriageway works,

— bridge works to form a viaduct over the River Till, an under bridge for the B3083, a flyover at the A345 Countess Roundabout, and 4 green bridges (Parsonage Down accommodation bridge, Winterbourne Stoke accommodation bridge, A360 Longbarrow Junction and green bridge No 4),

— carriageway and tunnel technology,

— landscaping and habitat creation,

— extension of parsonage down national nature reserve,

— protected species mitigation measures,

— ensure rights of way and private means of access,

— mainline earthworks,

— utilities works.

2) Refurbishment, replacement and modification of existing assets;

There are works required on existing assets under the current ownership of both Highways England and Wiltshire Council. Continued engagement and consultation will be required with both parties throughout the design and construction phases for these elements including:

— existing A303 de-trunking works,

— demolition works and site clearance works,

— modification works to existing structures.

3) Maintenance and operation during construction

Maintenance and operation of the existing A303 within the site boundary will be required for the duration of the construction works. The appointed contractor will be required to liaise with Highways England, its maintenance contractors and Wiltshire Council to coordinate activities.

4. Post construction maintenance period

There is an extended maintenance period (minimum of 5 years, maximum of 7 years) after construction to 'prove' the tunnel performs as intended. Maintenance is included as part of this period and the contractor will be responsible for all elements of the infrastructure associated with the tunnel and its approaches. The appointed contractor will be required to liaise with Highways England, its maintenance contractors and Wiltshire Council to coordinate activities and tunnel operations.

The appointed Contractor will be required to fulfil the duties of principal designer and principal contractor under the Construction (Design and Management) Regulations 2015.

Deadline Date2019-09-13
Publication Date2019-07-15
CountryUnited Kingdom
Procurement StatusActive
TypeCompetitive dialogue
Contract TypeWorks
Award CriteriaThe most economic tender
Value1250000000
OrganisationHighways England Company Ltd
AddressTemple Quay House, 2 The Square, Temple Quay
TownBristol
Postal CodeBS1 6HA
Class Code45221241
Class DescriptionRoad tunnel construction work
SourceOffice for Official Publications of the European Communities - Tenders electronic daily (Ted)

Version of 2019-02-06

Construction work

Highways England is charged with operating, maintaining and improving England's motorways and major A roads. We want to engage with suppliers to inform our approach to procuring our complex infrastructure projects.

Highways England wishes to formally make the market aware of potential opportunities in relation to the A303 Amesbury to Berwick Down project which passes through the Stonehenge, Avebury and Associated Sites World Heritage Site (WHS).

The project comprises of a new dual, two-lane carriageway approximately 13 kilometres long between Amesbury and Berwick Down consisting of:

— a bypass to the north of Winterbourne Stoke with a viaduct over the River Till,

— a new junction between the A303 and A360 to the west of and outside the WHS, replacing the existing Longbarrow Roundabout,

— a twin-bore tunnel through the WHS and past Stonehenge c.2 miles in length,

— a new junction between the A303 and A345 at the existing Countess Roundabout.

Extended TitleAmesbury to Berwick Down A303
Extended Description

Highways England commenced an engagement process in 2018 to identify suppliers who are interested in working with us on the A303 Amesbury to Berwick Down project.

This is a large and complex project, which will require critical capabilities from balanced, diverse and sustainable supply chain partners. Highways England remains committed and looks forward to talking to all those in the UK, European and International markets who are interested in helping us deliver this project.

Highways England intends to use an e-Sourcing portal (Bravo) to communicate and undertake further Market Engagement activities for the above project. Please register on the portal in order to be involved in future market engagement for any aspect of the A303 Amesbury to Berwick Down project.

Details of any further events will be provided to those registered to this PIN and your comments sought, on more specific elements of the projects. Invites to specialist events will be targeted to suit those relevant specialisms.

Collaboration is at the heart of the relationships necessary to deliver at the scale and pace required. Highways England are planning to hold supplier engagement events such as an Interactive webinar session in early 2019 and an Industry day prior to the launch of the procurement exercise. This is to provide an overview of Highways England’s opportunities available to the market related to the A303 Amesbury to Berwick Down project.

Publication Date2019-02-06
CountryUnited Kingdom
Procurement StatusFuture
TypeNot applicable
Contract TypeWorks
Award CriteriaNot applicable
OrganisationHighways England
Attention OfProcurement Delivery Manager
AddressThe Cube, 199 Wharfside Street
TownBirmingham
Postal CodeB1 1RN
Phone+44 1210000000
Class Code45000000
Class DescriptionConstruction work
SourceOffice for Official Publications of the European Communities - Tenders electronic daily (Ted)

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