the near-semicircular arches are red brick, constructed in five separate rings, with stone voussoirs. Sleeper walls rise from the arches to support the stone slabs of the viaduct's deck and hollow spandrels support plain solid parapet walls. In total, 1.5 million bricks were used; some of the limestone blocks weigh eight tons.

Ribblehead Viaduct is 300 m above sea level on moorland exposed to the prevailing westerly wind. Its height, from foundation to rails is 50.3 m. It is 404.8 m long on a lateral