Abercarn Aqueduct and Bridge (partly in Abercarn Community)

The Abercarn Aqueduct and Bridge, located in the Carn valley, carries both the canal and the adjacent road. The structure features a high abutment on the west side with a small tunnel for the stream. To the south, there is an extension of the abutment made of different later masonry, with both sections rising to form a low parapet next to the west side of the canal. On the east side, also constructed of later masonry, is the eastern tunnel portal, which does not align with the higher roadside parapet.

The aqueduct's masonry on the west side primarily consists of narrow coursed rubble, forming a massive retaining wall with ashlar voussoirs and tooled quoins. It has a segmental arched portal, with walls that project slightly on either side, leaving the central section, including the arch, recessed. The walls curve outward, with a sharper curve at the northern end. The southern end returns sharply, featuring a change in masonry to rockfaced stone. The parapets at canal level differ in appearance and are mostly covered in ivy.

On the east side, the portal is round arched, with deep narrow rockfaced voussoirs. Angled abutments with heavy capstones, which are incomplete on the left side, are built against the archway, with the masonry bonded at the impost level. Above this is the roadside parapet made of rubble with rockfaced coping, marked with the boundary stone 'Mynyddislwyn Highway District MR 1880'.