Around 2006, planning permission had been granted to fill in the tunnel and the adjoining cuttings, but work has not started yet.

An application has been made to Leeds city council for complete full landfill as of October 2018 The tunnel is located west of the site of Pudsey Greenside railway station and of the bridge leading Carlisle Road across the former line, and east of a bridge of Smalewell Quarry track, beneath the Fox and Grapes public house.

The tunnel has not been built in a straight line, but with a slight S-shaped curvature that nevertheless allows to keep at least one entrance in sight at any point of its route.

[5] The eastern portal is located below steep retaining walls on the south side of the approach cutting.

The lining consists of masonry side walls with a height of about 7 ft (2.1 m), the roof arch has been constructed from engineering brick.