Toadmoor Tunnel (originally called Hag Wood Tunnel) was built at Ambergate in Derbyshire, England, as part of the North Midland Railway, which opened in 1840. [1]
128 yards long, it was cut through an unstable hillside on a notoriously difficult line of route. What had initially been expected to be acceptably strong coal-bearing rock turned out to be wet shale. On beginning excavation a landslide occurred, the effects of which can still be seen further up the bank in Thatcher's Wood. [2]
The engineer Frederick Swanwick decided to proceed using the cut-and- cover method, with stone retaining walls and invert, and a brick-built masonry arch over the top, which gives it its unusual elliptical shape. Because of this, it took 15 months to build, instead of the planned two.
It is thought that a second landslip may have occurred sometime later, so that it was braced with steel hoops at its southern end. [2]
Because of the tunnel cross section the depth of ballast under the track is adequate in the centre but almost nothing close to the walls, which produces settlement in the middle and crushed ballast at the edges. [3]
Other problems arise with a need for increased line speed and the arrival of electrification, not least because it is grade 2 listed and part of the Derwent Valley World Heritage Site.
The Derwent is a river in Derbyshire, England. It is 50 miles (80 km) long and is a tributary of the River Trent, which it joins south of Derby. Throughout its course, the river mostly flows through the Peak District and its foothills.
Ladybower Reservoir is a large Y-shaped, artificial reservoir, the lowest of three in the Upper Derwent Valley in Derbyshire, England. The River Ashop flows into the reservoir from the west; the River Derwent flows south, initially through Howden Reservoir, then Derwent Reservoir, and finally through Ladybower Reservoir. The reservoir is owned by Severn Trent.
Cromford is a village and civil parish in Derbyshire, England, in the valley of the River Derwent between Wirksworth and Matlock. It is 17 miles (27 km) north of Derby, 2 miles (3.2 km) south of Matlock and 1 mile (1.6 km) south of Matlock Bath. It is first mentioned in the 11th-century Domesday Book as Crumforde, a berewick of Wirksworth, and this remained the case throughout the Middle Ages. The population at the 2011 Census was 1,433. It is principally known for its historical connection with Richard Arkwright and the nearby Cromford Mill, which he built outside the village in 1771. Cromford is in the Derwent Valley Mills World Heritage Site.
The Ecclesbourne Valley Railway is a 9-mile (14.5 km) long heritage railway in Derbyshire. The headquarters of the railway centre on Wirksworth station, and services operate in both directions between Wirksworth and Duffield and from Wirksworth to Ravenstor.
The Cromford Canal ran 14.5 miles from Cromford to the Erewash Canal in Derbyshire, England with a branch to Pinxton. Built by William Jessop with the assistance of Benjamin Outram, its alignment included four tunnels and 14 locks.
Peak Rail is a preserved railway in Derbyshire, England, which operates a steam and heritage diesel service for tourists and visitors to both the Peak District and the Derbyshire Dales.
The Midland Railway – Butterley is a heritage railway and museum complex at Butterley, near Ripley in Derbyshire.
The Derwent Valley line is a railway line from Derby to Matlock in Derbyshire.
Whatstandwell railway station is a railway station owned by Network Rail and managed by East Midlands Railway. It serves the villages of Whatstandwell and Crich Carr in Derbyshire, England. The station is located on the Derwent Valley Line from Derby to Matlock.
Matlock railway station is owned by Network Rail and managed by East Midlands Railway; it serves the Derbyshire Dales county town of Matlock, Derbyshire, England. The station is the terminus of both the Derwent Valley Line from Derby and Peak Rail who operate heritage services to Rowsley South. Both lines are formed from portions of the Midland Railway's former main line to Manchester Central. Through running is technically possible but is not done in normal service.
Belper railway station serves the town of Belper in Derbyshire, England. The station is located on the Midland Main Line from London St Pancras to Leeds via Derby, a little under 8 miles (13 km) north of Derby.
Ambergate railway station is a railway station owned by Network Rail and managed by East Midlands Railway. It serves the village of Ambergate in Derbyshire, England. The station is located on the Derwent Valley Line from Derby to Matlock, which diverges from the Midland Main Line just south of the station at Ambergate Junction.
Milford Tunnel is a double-track railway tunnel on the Midland Main Line in Derbyshire which runs under a hill called the Chevin between Duffield and Belper. It was built in 1840 by the Stephensons for the North Midland Railway. At 856 yards (783 m) long, Milford Tunnel was the second-longest tunnel on the North Midland Railway when it was built.
The Manchester, Buxton, Matlock and Midland Junction Railway ran from a junction with the Midland Railway at Ambergate to Rowsley north of Matlock and thence to Buxton.
Ambergate is a village in Derbyshire, England, situated where the River Amber joins the River Derwent. It is about 6 miles (9.7 km) south of Matlock.
Shining Cliff Woods are on the west bank of the River Derwent near to Ambergate in Derbyshire, England.
The River Alport flows for 5.6 miles (9 km) in the Dark Peak of the Peak District in Derbyshire, England. Its source is on Bleaklow, 3 miles (4.8 km) east of Glossop, from which it flows south through the Grains in the Water bog, then over gritstone below the Alport Castles landslide to Alport Bridge on the A57 Snake Pass route from Sheffield to Manchester, where it joins the River Ashop. The Ashop flows into Ladybower Reservoir about 2.5 miles (4.0 km) down the valley, which discharges via the Rivers Derwent and Trent to the North Sea. The source of the Alport is close to the Pennine watershed.
The Derwent Valley Heritage Way (DVHW) is a 55 miles (89 km) waymarked footpath along the Derwent Valley through the Peak District. The walk starts from Ladybower Reservoir in the Peak District National Park via Chatsworth, the scenery around the Derbyshire Dales, and through the Derwent Valley Mills World Heritage Site. It follows the Riverside Path through Derby and continues onwards to the historic inland port of Shardlow. Journey's end is at Derwent Mouth where the River Derwent flows into the River Trent.
High Peak Junction, near Cromford, Derbyshire, England, is the name now used to describe the site where the former Cromford and High Peak Railway (C&HPR), whose workshops were located here, meets the Cromford Canal. It lies within Derwent Valley Mills World Heritage Site, designated in 2001, and today marks the southern end of the High Peak Trail, a 17 miles (27 km) trail for walkers, cyclists and horse riders. The Derwent Valley Heritage Way also passes this point, and popular walks lead from here along the towpath in both directions.
Cromford Wharf is at Cromford in Derbyshire, England.