Devonshire Tunnel is on the closed

Somerset & Dorset Joint Railway The Somerset and Dorset Joint Railway, also known as the S&D, SDJR or S&DJR, was an England, English railway line connecting Bath, Somerset, Bath (in north-east Somerset) and Bournemouth (now in south-east Dorset but then in Hampshire), with ...

main line, between

Midford Midford is a village approximately south-south-east of Bath, Somerset, England. Although relatively small, it extends over 2 counties (Wiltshire and Somerset), is part of two unitary authorities (Wiltshire and Bath and North East Somerset) and i ...

and

Bath Green Park railway station Green Park railway station is a former railway station in Bath, Somerset, England. For most of its life, it was known as ''Bath Queen Square''. Architecture and opening Green Park station was opened in 1870 as the terminus of Midland Railway's ...

s, below high ground and the southern suburbs of

Bath Bath may refer to: * Bathing, immersion in a fluid ** Bathtub, a large open container for water, in which a person may wash their body ** Public bathing, a public place where people bathe * Thermae, ancient Roman public bathing facilities Pl ...

, England, emerging below the northern slopes of

Combe Down Combe Down is a village on the outskirts of Bath, England in the Bath and North East Somerset unitary authority within the ceremonial county of Somerset. Combe Down village consists predominantly of 18th and 19th century Bath stone-built villas ...

village. It opened in 1874 and was named after the road called Devonshire Buildings which lie immediately above the tunnel. It now forms one of the eponymous tunnels in the

Two Tunnels Greenway The Two Tunnels Greenway is a shared use path for walking and cycling in Bath, Somerset, England. The route links National Cycle Route 24 south of Bath with National Cycle Route 4 in the town centre, and is designated as National Cycle Route 244. ...

Gradient

The tunnel had a gradient of 1 in 50, on a line where the

ruling gradient The term ruling grade is usually used as a synonym for "steepest climb" between two points on a railroad. More simply, the steepest grade to be climbed dictates how powerful the motive power (or how light the train) must be in order for the run to ...

was also 1 in 50.

References

* Map sources for: , West portal; , East portal Tunnels completed in 1874 Rail trail tunnels in England Buildings and structures in Bath, Somerset History of Bath, Somerset Transport in Bath, Somerset Rail transport in Somerset Somerset and Dorset Joint Railway Tunnels in Somerset Footpaths in Somerset Combe Down {{Somerset-struct-stub