Former railway bridge, Cahard Road, Ballydyan, Ballynahinch, Co Down is a Grade B2 listed building in the Newry, Mourne and Down local planning authority area, Northern Ireland. First listed on 31 March 2005.

Former railway bridge, Cahard Road, Ballydyan, Ballynahinch, Co Down

WRENN ID
tangled-flue-amber
Grade
B2
Local Planning Authority
Newry, Mourne and Down
Constituency
Strangford MP: Jim Shannon (DUP)
Country
Northern Ireland
Date first listed
31 March 2005
Irish grid reference
J 405 547
Coordinates
54.422, -5.83545
Source
NI Environment Agency listing

Also on this page: radon risk · weather exposure · detailed attributes ↓

Description

This is a single-span, skewed road bridge, built in 1857-58, carrying Cahard Road over the former Belfast & County Down Railway line. The bridge is of industrial archaeological interest, notable for its style, proportion, plan form, and structural system, and possesses local historical interest. The Belfast & County Down Railway line was closed in 1950. The structure is located approximately three miles northeast of Ballynahinch, in the townland of Ballydyan.

The bridge was designed by Sir John MacNeill, chief engineer of the Belfast & County Down Railway Company, and built by contractor Patrick Moore. It was constructed to carry Cahard Road over a new section of the company’s line to Ballynahinch. The bridge is primarily constructed of squared fieldstone with sandstone coping to the parapets, brick voussoirs to the elliptical arch, a sandstone string course at road level, and brick quoins to the parapets. Due to the skew, the underside of the arch is stepped, with further brick voussoirs and sandstone string courses to each side. A section of the parapet coping on the western side has been replaced with concrete, and parts are now rendered.

Local climate

Former railway bridge, Cahard Road, Ballydyan, Ballynahinch, Co Down receives an average of 920 mm of rain a year. This makes it wetter than 70% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 73% of listed buildings.

It experiences an average of 7 freeze-thaw cycles a year, fewer than 95% of listed buildings. Of these, 4 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

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