The Liffey Service Tunnel (Irish: Tollán Sheirbhísí na Life) is a service tunnel for various pipelines in Dublin, Ireland, owned by Dublin City Council.

[1] The tunnel was designed by British company Atkins[2] and constructed by a joint venture of the German contractor Züblin and the Irish contractor Cleary & Doyle of Wexford.

[citation needed] The tunnel is 260 m (280 yd) long and consists of a single bore of diameter 2.96 m (9 ft 9 in).

It was built in pipe-jacking using a Herrenknecht tunnel-boring machine and 2.5 m (8 ft 2 in)-long precast reinforced-concrete pipes.

The tunnel leads from the southern edge of the East Link Bridge, underneath the River Liffey towards the North Quay Wall, approximately 150 m (160 yd) west of 3Arena.