|Date||6 November 2010|
|Location||A55, North Wales Coast||
SH 78130 78407; 53.28856°N, 3.82967°W (Conwy)
SH 74738 78352; 53.28727°N, 3.88051°W (Penmaenbach)
SH 70028 76080; 53.26573°N, 3.95019°W (Pen-y-clip)
The Conwy Tunnel was opened in 1991 and is 1060 m long. It goes under the River Conwy estuary and was the UK’s first immersed tube tunnel.
The westbound Penmaenbach tunnel was opened in 1989 and is 658 m long. It is next to the 172 m long eastbound tunnel that was opened in 1932.
The westbound Pen-y-Clip tunnel is 930 m long and was opened in 1994.