Permission is being sought to demolish EventCity and the vacant SoccerDome to make way for a £250m water park in Manchester.
Peel L&P is behind the application which would lead to the creation of Therme Manchester.
The regeneration business has submitted plans to Trafford Council to knock down the 28,000 sq m EventCity conference and exhibition space on Barton Dock Road.
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If approved, the 18-acre resort would be located opposite Trafford Palazzo and The Trafford Centre and is expected to be open in 2025.
It would create 1,200 jobs, Peel has said, and have an economic impact of over £4.5bn.
The development is expected to feature a waterpark, thermal bathing, a wellbeing spa, "immersive" digital art, an on-site urban farm and botanical gardens.
It will also include a green 'vertical forest' multi-storey car park to be located at Peel L&P’s Trafford Palazzo as well as an all-season urban beach and waterslides surrounded by plants.
There will also be a snow room, multi-sensory showers, oxygen rooms and a visitor and education centre.
James Whittaker, Peel L&P’s executive director of development, said: "Therme Manchester is an attraction like no other and it’s incredibly exciting to be making preparations to bring the UK’s first resort of this kind to TraffordCity for people of all ages to enjoy.
"It will attract visitors and investment from across the globe to TraffordCity and the wider city region and we’re proud to be the host venue for such an exceptional development with a strong focus on sustainability, health and wellbeing."
Richard Land, chief development officer, Therme Group UK, added: "We are delighted to have reached this critical stage with Peel L&P, which marks the beginning of on-site works for Therme Manchester.
"An iconic project for the city as well as for the entire UK, this milestone confirms the arrival of Therme in the North. It also solidifies our vision for 90% of the UK to be within easy reach of a Therme destination, with future developments planned for Glasgow, London and other key cities."
If approved, the demolitions would start as early as the end of September/beginning of October and be complete around spring 2023.
The construction of Therme Manchester is set to begin in 2023 with a build time of approximately two years.
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