Combe Down Tunnel

Combe Down Tunnel is on the now-closed Somerset and Dorset Joint Railway main line, between Midford and Bath Green Park railway station, below high ground and the southern suburbs of Bath, England, emerging below the southern slopes of Combe Down village.

Combe Down Tunnel
The tunnel portal in 2013
Overview
LineSomerset and Dorset Joint Railway
Locationc. 2.5 miles from Bath Green Park
Operation
Opened1874
Closed1966 (railway)
OwnerWessex Water
Technical
Length1,829 yards (1,672 m)
No. of tracksSingle
Tunnel clearancethe crown of the arch is between 14'9"-18'0" above the invert.
Widthvaries from 11'6"-13'7"
Grademostly 1 in 100 (1%) descending towards Midford (away from Bath)

Opened in 1874, this 1,829-yard (1,672 m) long disused railway tunnel was once the UK's longest without intermediate ventilation. The tunnel now forms part of the £1.8 million Two Tunnels Greenway walking and cycling path opened on 6 April 2013 and is the longest cycling tunnel in Britain. Its custodian is Wessex Water.

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