In March 2018, our specialist diving team carried out a tactile underwater examination of the Tay Rail Bridge, Dundee; from sea bed to high water level, working within the Firth of Tay tidal estuary.
The structure is an 86 span viaduct which carries two lines over the Tay Estuary between the City of Dundee and the suburb of Wormit in Fife. 77 of the spans are in the watercourse and this particular project was focused on 38 such spans.
- Recording bed levels around the piers in relation to a fixed datum to check for scour.
- Conducting a debris survey of the bed around the structure.
- Removing hard and soft marine growth from a selection of piers.
The team used a barge and small lightweight RIB to secure the barge to each pier and the divers were in and out of the water between piers. To reduce the considerable workload on the divers, as much as possible of the pier cleaning was carried out from the barge prior to cleaning via diving.