The National Diving and Activity Centre (NDAC), was a facility located at a large flooded quarry at Tidenham, Gloucestershire, England, near to the border with Wales at Chepstow. It was previously Dayhouse Quarry, a source of limestone, which was flooded in 1996. The diving centre opened in 2003, and closed in 2022.
Facilities An inland scuba diving site, it was popular with technical and free divers due to the depths of up to , with underwater attractions in depths ranging from to . PADI and IANTD training was provided on site, and many local BSAC and SAA clubs used the site for training. All freediving at the NDAC was undertaken through SaltFree Divers.
The site also included an inflatable assault course, bungee jumps, paddle boarding and a long zip wire.
Closure On 18 February 2022, the NDAC issued a statement via social media saying that the site was permanently closed.Rosemary E Lunn NDAC: Top UK dive training quarry closes XRay Mag, 18 February 2022. The following month it was reported that the site had been purchased by a company seeking to develop equipment to enable people to live deep under water. Carmelo Garcia, "National Diving Centre's new owners plan 'research pods for underwater living' in £150 million scheme", Gloucestershire Live, 9 March 2022. Retrieved 14 April 2022 In September 2023 it was revealed that the site had been acquired by The DEEP Institute and renamed DEEP Campus.
In media In 2017, the NDAC was a location for the Netflix folk horror film Apostle starring Michael Sheen and Dan Stevens.https://id-id.facebook.com/NationalDivingAndActivityCentre/photos/apostle-is-a-new-horror-from-netflix-and-it-looks-absolutely-terrifying-as-well-/2240916865953411/
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