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VOBSTER QUAY INLAND DIVING & SWIMMING CENTRE
VOBSTER QUAY
3D MODELS COURTESY OF MARCUS BLATCHFORD & SIMON BROWN
3D MODELS COURTESY OF
MARCUS BLATCHFORD
& SIMON BROWN
SURFACE WATER TEMP:  10.8 °C    UPDATED:  02-12-2021
SURFACE WATER TEMP:  10.8 °C
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DIVE ATTRACTION
Stone Delivery Tunnel
Photos copyright © Jason Brown
For more seasoned divers with experience of overhead environments, we've got something very special to offer - an 18 metre-long concrete-lined 'cave' cut through the limestone from the days when the quarry was still operational.
Our stone delivery tunnel was originally used to transport processed limestone from the adjacent Crushing Works up and out of the quarry via a rail line that was later replaced by a system of conveyors. Whilst the tunnel conveyers have long since been removed, you can still clearly see evidence of their mounts at various points along the floor of the tunnel. Now there are little in the way of obstructions inside the tunnel, making it a relatively simple to navigate for divers with overhead experience.

Perhaps the most interesting aspect of the stone delivery tunnel is the semi-circular roof that runs the full length of the tunnel. Constructed using a series of blocks bolted together to form an 18 metre-long arch, it's quite an impressive feat of engineering! Whilst navigation through the tunnel is pretty straightforward, we've added a sturdy white guideline at the highest point of the roof that runs the full length.
Stone Delivery Tunnel
INFORMATION FOR DIVERS
Despite being reinforced with a concrete liner along its entire length and wide enough for two divers to travel through side by side, the tunnel should only be attempted by divers with overhead environment training - even then, only enter if you like your overhead environments dark and spooky!
Located at a depth of 14 metres, the entrance to the tunnel can be found at the end of the track that leads down from the quayside slipway. Once you reach it, you'll discover a thick white cable tied off at the entrance. Running along the roof for the entire length of the tunnel, this high-visibility cable provides a useful guideline for even the most experienced overhead environment diver.

As you progress through the tunnel, be aware that the depth will steadily increase - and the water temperature drop - until you reach the exit at 22 metres. Visibility, water temperature and ambient light levels can varying massively between the entrance and exit to the tunnel so make sure you that you keep your torch switched on even once you've exited the tunnel. We recommend that any diver entering the tunnel carries at least *two* torches.

At the tunnel exit, you'll find yourself very close to the base of the Crushing Works. To locate the Crushing Works from the tunnel exit, fin forward with the wall on your right hand shoulder for approximately 5 metres.
Essential Information
Buoy #
14
Location
Minimum Depth
14 metres
Maximum Depth
22 metres
Best Bits
The darkness beckons!
Concrete lined ceiling
Hazards
Overhead environment
Loss of visibility
Disorientation
Entanglement
Depth
SAFETY FIRST: Only experienced divers with overhead environment training should enter this dive attraction. Movement inside is restricted and the cold, darkness and depth can be very disorientating. If in doubt, DO NOT ENTER!
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