Cylindrical feature by Mugdock Reservoir
Introduction
The photograph on this page of Cylindrical feature by Mugdock Reservoir by Stephen Sweeney as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © Stephen Sweeney Taken: 16 Feb 2008
I do not know the exact purpose of this feature - perhaps an access tunnel of some description, or a small pumping station - any info would be much appreciated.