The utility big has issued a proper tender for the tunnelling and connection works after a 12 months of market engagement.
The dual-tunnel scheme varieties a central a part of its long-term Water Useful resource Administration Plan, permitted by authorities and backed by Ofwat for the AMP8 management interval.
The tunnelling and connection works are being tendered as a two-stage NEC4 contract with as much as 4 bidders because of be shortlisted for closing bids.
Works embrace:
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A 4.2km tunnelled conveyance route utilizing a 3.5m diameter TBM from Mogden Sewage Therapy Works to a brand new discharge level on the Thames upstream of Teddington Weir
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A 150m pipe-jacked 2.2m diameter water switch pipe from a brand new abstraction level to the prevailing Thames Lee Tunnel, linking with East London’s reservoir system
- 4 entry shafts can even be constructed as a part of the tunnel works.
Head of procurement and provide chain Mohit Farmah stated: “We’re in search of business main tunnelling specialists to assist us ship this nationally vital infrastructure venture.
“This scheme will likely be very important as we reply to the challenges of local weather change and inhabitants progress.”
Building is predicted to start out in 2029 topic to planning approval. The tunnels will allow recycled water to be launched upstream to compensate for drought-time abstraction, defending wildlife and river well being whereas bolstering provides.
corporations can register to entry tender paperwork (click here).
The nationally vital venture will present as much as 75 million litres of water per day throughout drought, supported by water recycling from Mogden sewage remedy works. Thames Water forecasts a each day water shortfall of 1 billion litres by 2050 until motion is taken.
Teddington Direct River Abstraction plan
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