A Mystery?!

Down by the river Devon, just behind the Cambus low road. This derelict building sits in a field with tree`s covering it. There is nothing else around it besides the river. Having a look through google to try and find out what this was actually used for, wondering if it was an old railway house or something of the sort. Back when Alloa was a source of all trades such as docklands, coal trains passing through, brickhouses ect.