[5] A doorway in the north-west corner of the bridge gives access to a small cell built into the structure.

[4] It is possible that the upper, two-span tier was built on top of an existing, single-span structure, giving rise to the unusual design.

[5][7][8] This would likely have been because the a road leading up the ravine from the level of the lower tier, while suitable for foot traffic, would have been too steep for a carriage to manage.

[3] It is probable that Robert Adam, who designed the house, also worked on the bridge,[1] but no drawings or documentation survive to confirm this.

[4] It was added to the Buildings at Risk Register for Scotland in 2008, due to the invasion of vegetation leading to bulging walls and the loss of pointing and masonry.