[4][5][6] Due to the extensive blasting required to create 27-metre deep cuts through granite, the line suffers from rockfalls, with twelve significant falls happening between 1960 and 1987.

In January 1994, the spiral line closed for a four-month rebuild, which saw the cuts widened and regraded to benched 55 degree slopes as part of the One Nation project.

[3] Bethungra Spiral was listed on the New South Wales State Heritage Register on 2 April 1999 having satisfied the following criteria: The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales.

There are other spots on that road from where three railway tracks can be seen at three different heights on the adjacent hillside to the east of the Olympic Highway.

The route of the proposed Inland Rail entails a new section of line from Illabo, west of Bethungra, to Stockinbingal, to obviate the need for northbound trains on the Inland Railway to climb the Bethungra Spiral to Cootamundra then drop down to Stockinbingal to continue north towards Forbes then Parkes.

[9] Around 0340 on 15 January 2022 ten trucks of a 1,500 metres (4,900 ft) freight train left the rails at the highest point of the spiral, above the cutting.

[10] This Wikipedia article was originally based on Bethungra Spiral, entry number 1026 in the New South Wales State Heritage Register published by the State of New South Wales (Department of Planning and Environment) 2019 under CC-BY 4.0 licence, accessed on 5 March 2019.