One sits slightly off-centre to the east and is noticeably larger than the others, a quiet irregularity in what is otherwise a composed and deliberate piece of masonry.

The bridge carries a road on a north-south axis and spans the Blackwater across five semicircular arches, each with a clear opening of roughly 5.2 metres. The voussoirs, the wedge-shaped stones that form each arch and lock it in place under compression, are dressed limestone, set in contrast against the body of the bridge, which is built from random-rubble sandstone with limestone used for the finer details. The cutwaters, those angled projections that shed the river's force and protect the piers, appear only on the upstream side, which is the conventional arrangement. The structure has the appearance of nineteenth-century work, a period when road infrastructure across rural Ireland was being consolidated, often under grand jury commission or in the wake of improvement schemes tied to larger estates and regional commerce. The place name Coalpits hints at some kind of industrial past in the locality, though the bridge itself belongs to the vernacular engineering tradition rather than anything monumental.