The Columbia Encyclopedia, Sixth Edition. 2001-07.
Menai Strait
(mn´) (KEY) , channel of the Irish Sea, 14 mi (23 km) long and from 200 yd (183 m) to 2 mi (3.2 km) wide, between the island of Anglesey and mainland Gwynedd, NW Wales. Thomas Telfords suspension bridge (1826; rebuilt 193841) carries the road from Bangor on the mainland to Anglesey, over the strait, and Robert Stephensons tubular bridge (1850) carries a railroad. Caernarvon is on the strait; Llanfair-Pwllgwyngyll is nearby.