Smardale Gill Viaduct.

Built in 1861 and closed in 1962. Part of the South Durham and Lancashire Union Railway. Designed, as was the nearby dismantled Belah viaduct, by the Cumbrian engineer Sir Thomas Boucher. Best not to mention the Tay Bridge disaster, that was one of his.

Lots of work recently to maintain the viaduct that carries a public footpath through the rather splendid nature reserve.

Done