Wolfclyde Bridge carries the A72 across the River Clyde a mile or so west of Biggar. It is a highly unusual structure in a number of respects. The river itself is spanned with two wide, shallow arches which have been substantially widened on their upstream side to approximately three times the original width. The old stone bridge is believed to date back to the early part of the 19th century, while the widening, in concrete, appears to be from the 1950s. This provides a wide S2 carriageway flanked with wide pavements across the river. The structure the continues for some distance on the west bank over a causeway type structure. The first section of this is also built of masonry and provides four small flood arches. There is then a short section of grassy embankment before a further two masonry flood arches are found, with the grass embankment continuing some distance beyond these.
The facings of the structure are generally of coursed rubble stone, with neater parapets and ashlar arch rings. These is no real embellishment beyond this. All of the piers are protected by triangular cutwaters, although the various abutments are square-cut. The arch rings on the flood arches are in squared rubble, and long diagonal walls separate the masonry sections of the embankment from the grassy slopes.
