<p>Having departed Buckshaw Parkway Station, Class 331 (331 027) is about to enter Hartwood Tunnel after passing under the Chorley Flying Arches.
</p><p>There are 16 flying arches just north of the Hartwood Tunnel. The arches which were constructed in 1841 support retaining walls in the deep cutting. They are a Grade11 listed structure and the first flying arches to be used in railway construction.
In 2008 the arches were removed to allow the tracks to be lowered ahead of electrification of the line. Originally self supporting, the arches which were replaced in 2016 are now supported by steel girders.
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Removal and reconstruction was carried out by Stobart Rail.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/126293612@N07">JOHN DICKINSON</a> from Chorley, Lancashire, United Kingdom
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