This is the third swing bridge to cross the river mourne, after the previous two where wash away by flooding. they where built for workers to get to Herdman linen mill. it doesn't actually swing but if several people cross it quickly then it bounces up and down alot. In my younger days I cross it on my motorbike.
The mill shut down years ago and has been set on fire several times since.
The mill race is now used to produce electric for the national grid.