Cougal Spiral

Cougal Spiral
The Brisbane Mail crossing over No.1 Spiral Tunnel in 1940
Location on the border between New South Wales and Queensland
Overview
Official nameBorder Loop railway formation and landscape
Other name(s)
  • Border Tunnel
  • Border Loop Spiral
  • Cougal To Border Loop
LineNorth Coast railway line
LocationRichmond Gap connecting New South Wales and Queensland, Australia
Coordinates28°21′16″S 152°57′51″E / 28.354390°S 152.964038°E / -28.354390; 152.964038
Operation
Opened29 August 1930
OwnerTransport Asset Holding Entity
OperatorAustralian Rail Track Corporation
Technical
LengthA series of three tunnels:
  • 192 metres (630 ft)
  • 177 metres (581 ft)
  • 1,160 metres (3,810 ft)
Track gauge4 ft 8+12 in (1,435 mm) standard gauge
Grade1.5%
Route map
Official nameBorder Loop railway formation and landscape; Cougal To Border Loop; Railway Spiral and Landscape
TypeState heritage (landscape)
Designated2 April 1999
Reference no.1027
TypeHistoric Landscape
CategoryLandscape – Cultural

The Cougal Spiral is a heritage-listed single track railway tunnel and spiral in Australia. The feature is located on the North Coast railway line in Australia that connects New South Wales with Queensland under the Border Ranges near Richmond Gap. It was built during 1930. It is also known as the Border Loop railway formation and landscape, Cougal To Border Loop and Railway Spiral and Landscape. The property was added to the New South Wales State Heritage Register on 2 April 1999.

The railway line needs to climb at a steady ruling gradient from Kyogle to the summit at a tunnel at the border between the two states. The border is also at the watershed. The rail spiral and associated facilities are located between 871 and 876 kilometres (541 and 544 mi) from Sydney Central railway station.