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Level monitoring protects natural spring waters

Vinci Construction proves compliance during £50m hotel renovation

The redevelopment of an architecturally significant building into a 5-star hotel and spa in Buxton brought many challenges for main contractor Vinci Construction. Not least was the requirement to protect the network of ancient thermal springs that run underneath Buxton Crescent. Endress+Hauser helped by installing a level monitoring solution for three swimming pools to ensure they didn’t leak into the aquifer and cause problems for the nearby Nestlé bottling plant.

Buxton Crescent

Buxton Crescent

FMR60 radar installed in a stilling tube to eliminate outside influences

FMR60 radar installed in a stilling tube to eliminate outside influences

The benefits

  • Natural spring waters protected by monitoring the pool levels.

  • Nearby Nestlé bottling plant was unaffected by the hotel renovation.

  • Vinci Construction was able to prove compliance with the national standard for design of concrete structures for retaining aqueous liquids (BS 8007:1987).

  • The project engineer was satisfied with data recorded by an FMR60 level device and exported from a Memograph M RSG45 advanced data logger.

Jenny Baxter, Senior Engineer, Vinci Construction

“Endress+Hauser’s involvement was immensely helpful.”

Jenny Baxter, Senior Engineer
Vinci Construction

The refurbishment and remodelling of a Grade I listed building in the heart of the Peak District is one of the most complex construction projects undertaken in the UK in recent years. Main contractor Vinci Construction had the task of redeveloping Buxton Crescent into an 80-bedroom 5-star hotel and adjoining thermal natural mineral water spa.

The challenge

As well as being architecturally significant, the Georgian and Victorian buildings stand directly above a network of ancient thermal springs, including the only source of natural mineral water used by Nestlé’s state-of-the-art bottling plant. This meant that all the construction work, including the development of three swimming pools, had to be carefully monitored.

Vinci Construction needed to comply with British Standard 8007:1987, which sets the permissible limit for loss of water at 1/500th of the maximum level of the pool, which worked out at around 1 mm. “The issue for us was how to monitor the water level when we had to record differences of just 1 mm,” explains Jenny Baxter, Senior Engineer for Vinci Construction. “All our usual techniques weren’t going to work, so we spoke to Nestlé and they suggested getting in touch with Endress+Hauser.”

Our solution

Endress+Hauser’s FMR60 radar device, which is accurate to +/-1 mm, was used to monitor the level of the main pools and a reference pool that was built to take into account evaporation and rainfall.

At the end of a test period, the data from the swimming pools and the reference tank was compared to determine the change in level. "The project engineer was delighted with the amount of data he got,” says Jenny. “It was clear from the data that the test had been passed, so it was a good result.”

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